JP2003194310A - Burner for gas stove - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a burner for a gas stove which suitably feeds secondary air in a large combustion amount time and improves heating efficiency, while stably keeping a combustion state in changing over a large combustion amount to a small combustion amount. <P>SOLUTION: This burner for a gas stove is provided with a burner body Bm and a burner cap Bc attached in a mounted form mounted on it, and a flame port H for forming flame toward the outside is formed along the circumferential direction between the burner body Bm and the burner cap Bc. The burner is so structured that the flame port H is provided with a flame keeping opening 19 formed in a gap-like form between the circumferential lower part of the burner cap Bc and the burner body Bm and a flame port forming part 13 for forming the flame port H between the burner cap Bc in the burner body Bm and itself is provided with a pendent part 26 projecting outside the burner cap Bc and positioned on the lower side of the flame port H. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is provided with a burner main body and a burner cap mounted on the burner main body, the burner cap being mounted on the burner main body and facing outwardly between the burner main body and the burner cap. The present invention relates to a burner for a gas stove in which flame openings that form a flame are formed along the circumferential direction.

[0002]

As shown in FIG. 23, such a burner for a gas stove jets a mixed gas of a gas fuel and primary air from a flame port H, and a secondary air (upstream) along an outer peripheral portion of a burner body Bm. (Indicated by a dashed arrow in FIG. 23), the mixed gas ejected from the flame outlet H is supplied with the secondary air for combustion into the combustion region of the mixed gas ejected from the flame outlet H. It is burned (for example, Japanese Patent Laid-Open No. 2001-2001
248809). In FIG. 23, 28
Is a flame port forming portion that forms a flame port H between the burner body Bm and the burner cap Bc. Although not illustrated, as shown in FIGS. 8 and 9 of the above-mentioned publication relating to the conventional technique, the flame port forming portion 28 is connected to the burner cap B.
The projecting portion projecting outward from the lower edge portion of c and located at the same height as the lower edge of the flame opening H has the same small projecting amount over substantially the entire circumference (outwardly than the lower edge portion of the burner cap Bc. The projecting portion 2 prevents the flame F formed at the flame opening H from being blown up by the secondary air flowing upward along the outer peripheral portion of the burner body Bm.
It can be considered to be suppressed by 9.

[0003]

By the way, in such a burner for a stove, although the combustion amount is adjustable, as shown in FIGS. 8 and 9 of the above publication, as in the conventional case,
Simply providing an overhanging portion that is at the same height as the lower edge of the flame outlet and over a substantially entire circumference with the same small overhanging amount, along the outer peripheral portion of the burner body immediately after reducing the combustion amount. If the flame becomes small in a state where the secondary air flowing upward flows in a large amount corresponding to the state in which the combustion amount is large, there is a problem that a small flame is easily agitated by the secondary air. When the flame is agitated, the flame is blown out and the flame does not transfer, making combustion unstable. By the way, the flame port is provided with a flame retaining port formed in a gap shape over the entire circumference or substantially the entire circumference between the lower portion of the outer peripheral portion of the burner cap and the burner body, and immediately after reducing the combustion amount, the flame opening is reduced. The flame holding effect of the flame holding formed at the flame holding mouth prevents the combustion of the flame from becoming unstable due to the flame holding effect. There was room for improvement because combustion itself became unstable because of itself being fueled. Therefore, in order to prevent the flame from being swirled by the secondary air immediately after reducing the amount of combustion, the overhang of the overhanging portion that is at the same height as the lower edge of the flame mouth and over the entire circumference and with the same overhanging amount. Although it is possible to make the amount sufficiently large, simply increasing the amount of protrusion causes the following problems. That is, if the amount of overhang of the overhanging portion is large, the supply of secondary air is likely to be hindered, so when the amount of combustion is increased and the flame becomes large, secondary air tends to run short and combustion becomes unstable. There is a problem that it tends to occur.
Further, when the flame becomes large, the flame tends to stick to the overhanging portion, and the flame is likely to be formed laterally so as to fit over the overhanging portion, resulting in a problem that the heating efficiency deteriorates.
Particularly in the case of a small cooking container, when the flame is formed laterally, the contact area of the flame with the bottom of the cooking container tends to be narrowed, and the heating efficiency is likely to deteriorate. In addition, in such a gas stove burner, in order to suppress the overheating of Gotoku, etc., the flame mouth is provided with a main flame mouth portion and an auxiliary flame mouth portion that forms a flame smaller than the main flame mouth portion. In some cases, the auxiliary flame mouth portion may be arranged corresponding to the Gotoku claw portion. In such a case, if the amount of overhang of the overhanging portion that is overhanging at the same amount over substantially the entire circumference is large, the combustion amount is increased, and when the flame formed at the main flame mouth portion becomes large, It is easy to run out of secondary air,
The problem that combustion becomes unstable easily occurs. In addition, the flame formed at the main flame mouth portion is likely to stick to the overhang portion, and the flame is likely to be formed laterally so as to fit over the overhang portion, resulting in a problem that the heating efficiency is deteriorated.

The present invention has been made in view of the above circumstances, and an object thereof is to maintain a stable combustion state when switching from a large combustion amount to a small combustion amount, and at the same time, to generate secondary air at a large combustion amount. Another object of the present invention is to provide a burner for a gas stove that can be appropriately supplied and can improve heating efficiency.

[0005]

Means for Solving the Problems [Invention of Claim 1]
The characteristic configuration according to claim 1 is configured such that the flame opening includes a flame holding opening formed in a gap shape between a lower portion of an outer peripheral portion of the burner cap and the burner main body. A flame port forming portion that forms the flame port between the burner cap and the burner cap is configured to have a projecting portion that projects outward from the burner cap and that is located below the flame port. is there. According to the characterizing feature of claim 1, the flame opening includes the flame holding opening formed in a gap between the lower outer peripheral portion of the burner cap and the burner body. Due to the flame holding action of the flame holding formed at the mouth, stable combustion can be performed at the flame mouth. And, even if the flame becomes small in a state where a large amount of secondary air is flowing immediately after reducing the combustion amount, it is possible to suppress the small flame from being fanned out by the overhang portion,
Moreover, the flame holding formed at the flame holding opening can be suppressed by the secondary air also by the overhanging portion, and while the combustion state can be stably maintained, the overhanging portion is more than the flame opening. Since it is located on the lower side, even if the amount of combustion increases and the flame grows, the secondary air is appropriately supplied without running out, and the flame easily separates from the overhanging part and overhangs. Since the clinging to the portion is suppressed, the flame is suppressed from being laid sideways, and the flame is easily formed upward. That is, when the flame becomes small immediately after reducing the combustion amount, the small flame is suppressed from being fanned by the secondary air, and in order to suppress the flame holding from being fanned by the secondary air, While the amount of overhang of the overhanging portion is made sufficiently large so that the combustion state when switching from the large combustion amount to the small combustion amount can be stably maintained, the overhanging portion is located below the flame port, Since a gap is likely to be formed between the flame and the overhang, even if the amount of combustion increases and the flame grows, the secondary air is appropriately supplied without running out. It is formed upward so that clinging is suppressed and heating efficiency can be improved. Therefore, while maintaining a stable combustion state when switching from a large combustion amount to a small combustion amount, it is possible to appropriately supply secondary air at the time of a large combustion amount, and further, to improve the heating efficiency. Burners can now be provided.

[Invention of Claim 2] In the characterizing structure of Claim 2, the flame port has a main flame port portion and an auxiliary flame port portion forming a flame smaller than the main flame port portion. The burner body is configured to include a flame port forming portion that forms the flame port between the burner body and the burner cap. The flame port forming portion is provided so as to have a projecting portion that projects outward from the burner cap. Of these, the projecting portion corresponding to the auxiliary flame opening portion is configured to project outward from the projecting portion corresponding to the main flame opening portion. According to the characteristic configuration of claim 2, even if the flame formed in the auxiliary flame opening portion becomes small in a state where a large amount of secondary air is flowing immediately after the combustion amount is made small, the auxiliary flame opening is made small. Since the overhanging amount of the overhanging portion corresponding to the portion is large, it is suppressed that the secondary air flowing upward along the outer peripheral portion of the burner main body is fanned, and the combustion state can be stably maintained, and Even if the amount of combustion increases and the flame grows, the amount of overhang of the overhanging portion corresponding to the main flame mouth is small, so the secondary air is appropriately supplied without shortage of secondary air. Further, the flame is restrained from sticking to the overhang portion, the flame is restrained from being laid sideways, and is formed upward so that the heating efficiency can be improved. In other words, even if the flame formed in the auxiliary flame opening becomes smaller immediately after reducing the combustion amount, the auxiliary flame opening can be sufficiently suppressed from being agitated by the secondary air. Even if the amount of overhang of the corresponding overhang is sufficiently large and the amount of combustion becomes large and the flame formed at the main flame mouth becomes large, the secondary air is appropriately supplied without shortage, and The amount of overhang of the overhanging portion corresponding to the main flame opening portion can be reduced so that clinging to the overhanging portion can be sufficiently suppressed. By the way, since the flame formed at the main flame mouth portion is larger and longer than the flame formed at the auxiliary flame mouth portion,
Even if the amount of overhang of the overhanging portion corresponding to the main flame opening is small, it is possible to prevent the air from being swirled by the secondary air. Also, since the flame formed at the auxiliary flame opening is shorter than the flame formed at the main flame opening, even if the flame easily sticks to the overhanging portion and is easily formed sideways, it will be cooked by heating. The reduction of the contact area of the flame with the bottom of the container is suppressed. Therefore, while maintaining a stable combustion state when switching from a large combustion amount to a small combustion amount, it is possible to appropriately supply secondary air at the time of a large combustion amount, and further, to improve the heating efficiency. Burners can now be provided.

[Invention of Claim 3] According to the characterizing feature of Claim 3, the flame opening includes a main flame opening portion and an auxiliary flame opening portion forming a flame smaller than the main flame opening portion. The flame mouth forming portion configured to include the flame mouth between the burner main body and the burner cap extends outward from the burner cap and is located below the flame mouth. Of the overhanging portion, the overhanging portion corresponding to the auxiliary flame opening portion is configured to project outward from the overhanging portion corresponding to the main flame opening portion. It is in. According to the characteristic configuration of claim 3, the overhanging portion corresponding to the auxiliary flame opening portion is located below the flame opening, and since the overhanging amount is large, it is formed in the auxiliary flame opening portion. The flame is prevented from clinging to the overhanging part, and even if the amount of secondary air is reduced immediately after the combustion amount is reduced, the amount of secondary air flowing upward along the outer peripheral portion of the burner body is reduced. Since it is suppressed from being agitated by the next air,
The combustion state can be maintained in a stable manner, the overhanging portion corresponding to the main flame opening is located below the flame opening, and the amount of overhang is small. , Even if the combustion amount becomes large and the flame becomes large, the secondary air is properly supplied without shortage,
In addition, it is easy to separate from the overhanging portion, clinging to the overhanging portion is suppressed, and the flame is easily formed upward so that the heating efficiency can be improved. In other words, since the overhanging portion is located below the flame mouth and flaring of the flame can be suppressed, it is possible to prevent the flame from clinging to the overhanging portion for the overhanging portion corresponding to the auxiliary flame mouth portion. While suppressing, even if the flame becomes small in a state where a large amount of secondary air flows immediately after reducing the combustion amount, it is possible to sufficiently suppress the flame from being burned by the secondary air. It is possible to increase the amount of overhang. As for the flame formed at the main flame opening, the overhang is located below the flame exit and the overhang of the overhang is small, which prevents the supply of secondary air from being interrupted. In addition, since it is possible to suppress clinging to the overhanging part, the overhanging part corresponding to the main flame mouth part does not run short of secondary air even if the combustion amount increases and the flame grows larger. The amount of overhang should be reduced along the outer periphery of the burner body while the amount of overhang of the overhang is made small so that the flame is adequately supplied and flame is sufficiently suppressed from sticking to the overhang. It is possible to stop the flame from being sufficiently ignited by the secondary air flowing upward. In short, with regard to the flame formed at the auxiliary flame port, even if the flame becomes small immediately after the combustion amount is reduced and a large amount of secondary air is flowing, the flame is fueled by the secondary air. It is also possible to sufficiently suppress the sticking to the overhanging part when the amount of combustion becomes large and the flame becomes large, and to prevent the flame formed at the main flame mouth part. Irrespective of the amount of combustion, the secondary air is appropriately supplied without shortage, and the secondary air immediately after the combustion amount is reduced while sufficiently suppressing clinging to the overhanging part. It is possible to sufficiently suppress the sway. Therefore, while maintaining a stable combustion state when switching from a large combustion amount to a small combustion amount, it is possible to appropriately supply secondary air at the time of a large combustion amount, and further, to improve the heating efficiency. Burners can now be provided.

[Invention of Claim 4] According to the characterizing construction of Claim 4, a concave groove is provided in the overhanging portion corresponding to the auxiliary flame opening portion along the circumferential direction and at both circumferential ends thereof being open. It is being done. According to the characteristic configuration of claim 4, boiling liquid is blown out from the cooking container,
Even if it flows down to the overhanging portion corresponding to the auxiliary flame mouth part, the dripping broth flows along the concave groove and flows down from the openings at both ends of the concave groove. Can be prevented. In other words, the auxiliary flame mouth part is
Since the opening area of the flame mouth is smaller than that of the main flame mouth, it is easy for the broth blown out from the heating and cooking container to enter and become clogged, but along the circumferential direction at the overhang corresponding to the auxiliary flame mouth And by providing a concave groove with both circumferential ends open, the broth that has flowed down to the overhanging portion can be made to flow down the overhanging portion along the concave groove.
It is possible to prevent the auxiliary flame mouth part from being clogged with boiling water. Therefore, it has become possible to reduce the burden on the maintenance work for releasing the blockage of the flame mouth.

[Invention of Claim 5] In the characterizing configuration of Claim 5, the flame openings are provided with a plurality of main flame openings provided at intervals in the circumferential direction, and the plurality of main flames. In a state of communicating with the lower portion of the mouth, the outer peripheral portion between the burner body and the burner cap is provided with a flame holding opening formed in a gap shape over the entire circumference or substantially the entire circumference, In the portion forming the flame holding port in the flame port forming portion, in a state over the entire circumference or substantially the entire circumference in the circumferential direction, a groove is provided, between the main flame openings adjacent to each other in the circumferential direction,
The flame-holding flow passage to which the gas fuel is supplied from the mixing pipe is provided so as to communicate with the concave groove. Claim 5
According to the characteristic configuration described in (1), when the mixed gas of the gas fuel and the primary air is supplied from the mixing pipe, the mixed gas is jetted from the main flame port and flows into the flame holding channel to flow from the flame holding port. It is discharged and burns in a state in which the main flame is formed by the main flame opening and flame holding is formed by the flame holding opening. In this case, part of the mixed gas flowing through the flame holding channel is discharged from the flame holding port between the main flame ports,
Flame-holding is formed between the main flame openings, and due to the ejector action of the mixed gas flowing through the main flame openings, a part of the mixed gas flowing through the flame-holding flow path passes through the concave groove, and the flame holding openings below the main flame openings are formed. Also flows and discharges from there, flame holding is also formed below the main flame opening, so flame holding is formed over almost the entire circumference, and flame holding is formed below the main flame opening. Since the mixed gas ejected from the main flame port burns in a state where the flame is held, the lift of the main flame is suppressed, and stable combustion is achieved as a whole. Then, as described above, the flame holding is formed over substantially the entire circumference along the lower side of the plurality of main flame openings provided at intervals in the circumferential direction, so that the main flame openings are formed. A burner for a gas stove configured to perform stable combustion by holding a main flame to be maintained by a flame holding, the burner having the characteristic configuration according to any one of claims 1, 2 and 3. By providing the overhanging portion in the flame port forming portion of the main body, the flame holding is suppressed from being fanned by the secondary air flowing upward along the outer peripheral portion of the burner main body even if the flame holding amount is reduced immediately after the combustion amount is reduced. Also, the main flame is supplied without a shortage of the secondary air, and the main flame is restrained from becoming sideways, so that the main flame is easily formed upward. By the way,
When a part of the flame mouth in the circumferential direction is formed as an auxiliary flame mouth portion forming a flame smaller than the main flame mouth portion as in the characteristic configuration according to claim 2 or 3, the auxiliary flame mouth portion is , You can eliminate the main flame port and configure it with only the flame retaining port,
It may be composed of an auxiliary flame opening and a flame holding opening whose opening area is smaller than that of the main flame opening. When the auxiliary flame opening portion is formed in this manner, not only the flame holding opening formed by the auxiliary flame opening portion but also the flame holding opening forming the main flame opening portion is formed. With respect to the flame holding, it is possible to prevent the secondary air flowing upward along the outer peripheral portion of the burner main body from being fanned. Therefore, the main flame formed at the main flame opening can be prevented by forming the flame holding along substantially the entire circumference along the lower side of the plurality of main flame openings provided at intervals in the circumferential direction. In a gas stove burner designed to promote stable combustion by holding flames, it is possible to suppress flare of flame holding when switching from a large combustion amount to a small combustion amount. Since the flame holding action by the flame can be further promoted, the combustion state when switching from the large combustion amount to the small combustion amount can be maintained more stably.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS [First Embodiment] A first embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a built-in type gas stove provided with a burner for a gas stove of the present invention (hereinafter, may be simply referred to as a burner). The gas stove has a main body M including three burners B and a grill G. And a top plate 21 that covers the upper surface of the main body M, and a Gotoku 22 that is placed on the top plate 21. On the back side of the main body M,
An exhaust port (not shown) for exhausting combustion exhaust gas in the grill G is provided, and a plurality of types of operation tools R for performing ignition and extinguishing operations and heat power adjustment of the burner B and the grill G are provided on the front surface of the main body M. An opening / closing door D for the grill G is provided.

As the three burners B, a high thermal power burner B1 having the largest combustion amount, and a standard burner B2 having a smaller combustion amount than the high thermal power burner B1 and having a temperature sensor T for detecting the temperature of the pot bottom, Small burner B with the smallest combustion amount
3 are provided, and in the following description, when it is necessary to distinguish and describe the three burners B, they will be referred to as a high thermal power burner B1, a standard burner B2, and a small burner B3, respectively.

As shown in FIG. 2 and FIG.
A circular secondary air passage recess 21a is formed in the boot 21 corresponding to the installation position of each burner B, and the upper portion of the burner B is inserted through the recess 21a at a substantially central portion of the recess 21a. A circular burner through hole 21b is formed, a plurality of secondary air inlets 21c are formed in the outer peripheral portion of the recess 21a at intervals in the circumferential direction, and the exhaust port of the grill G is inserted. An exhaust through hole 21e (see FIG. 1) is opened. The top plate 21 has a ring-shaped juice receiving tray 23 corresponding to the respective secondary air passage recesses 21a.
The outer peripheral portion is placed and supported on the top plate 21 with the inner peripheral portion thereof spaced apart from the top plate 21 to form the secondary air discharge port 24. Secondary air introduced from a plurality of secondary air inlets 21c on the outer peripheral side is discharged from the secondary air outlet 24 on the inner peripheral side between the tray 23 and the secondary air inflow ports 21c on the inner peripheral side so that the secondary air is supplied to the burner B. A generally donut-shaped secondary air flow path 25 is formed. In addition, in FIG. 3, the flow of the secondary air is shown by a dashed arrow. Gotoku 22 has 6 claws 22a for placing pots etc.
And is placed on the top plate 21 via the juice receiving tray 23 in a state where the relative positions of the six claws 22a and the burner B in the circumferential direction have a predetermined set positional relationship. Configured.

Similarly, each of the three burners B comprises a burner body Bm and a burner cap Bc mounted on the burner body Bm, which is mounted in a mounted state, and is fitted to the burner body Bm. Part Sm and burner cap B
The cap-side fitting portion Sc provided in c is fitted to the burner body Bm by moving the burner cap Bc toward the mounted state so that the burner cap Bc can be moved horizontally with respect to the burner body Bm. It is configured to perform positioning of.

Then, FIG. 3, FIG. 4, FIG. 9 to FIG.
Further, as shown in FIG. 14, in a state where the burner cap Bc is mounted on the burner body Bm in a mounted state, the mixed gas distribution chamber 1 is formed between the burner body Bm and the burner cap Bc. And its mixed gas distribution chamber 1
And a flame port H that forms a flame toward the outside and is formed along the circumferential direction.

Of the six locations corresponding to the claws 22a of the Gotoku 22 in the circumferential direction, the one corresponding to the ignition flame port 20 described later.
Five parts except the part are auxiliary flame mouth parts Hs, and parts except six parts corresponding to the claws 22a of the Gotoku 22 in the circumferential direction are main flame mouth parts Hm, and the auxiliary flame mouth parts Hs are main flame mouth parts. Configured to form a flame smaller than Hm,
The claw 22a of the Gotoku 22 is prevented from being overheated. That is, the flame opening H is the main flame opening portion Hm and the auxiliary flame opening portion H that forms a flame smaller than the main flame opening portion Hm.
s.

As shown in FIG. 3, FIG. 4, and FIG. 6 to FIG. 12, for the high thermal power burner B1 and the standard burner B2, the broth is guided to the upper part of the burner cap Bc and discharged in the radial direction. A broth discharge groove 5e is formed.
The broth discharge groove 5e is formed so as to overlap with two auxiliary flame port portions Hs out of the five auxiliary flame port portions Hs when viewed in the vertical direction.

The burner caps Bc of the high-power burner B1 and the standard burner B2 are provided with a plurality of main flame outlets 2 at a position corresponding to the main flame outlet portion Hm in a state where they are opened sideways and are circumferentially spaced apart. The auxiliary flame opening 4 is provided at a portion corresponding to the auxiliary flame opening Hs that does not overlap with the broth discharge groove 5e when viewed in the vertical direction.
Is provided on the outer peripheral portion between the burner body Bm and the burner cap Bc in a state of communicating with the lower portions of the plurality of main flame openings 2 and the plurality of auxiliary flame openings 4 and opening to the side of the burner cap Bc. A flame-holding port 19 having a gap shape is provided over substantially the entire circumference. As described above, the flame opening H is composed of the main flame opening portion Hm and the auxiliary flame opening portion Hs, but the main flame opening portion Hm is composed of the main flame opening 2 and the flame holding opening 19. However, the two auxiliary flame mouth portions Hs (hereinafter, sometimes referred to as auxiliary flame mouth portions Hs for discharging the broth) that overlap the broth discharge groove 5e in the vertical direction are the main flame mouth 2 and the auxiliary flame mouth 4 respectively. Is provided only with the flame holding port 19, and the auxiliary flame port portion Hs other than for discharging the broth is configured with the auxiliary flame port 4 and the flame holding port 19.

Further, as shown in FIGS. 13 and 14, in the small burner B3, the main flame opening portion Hm is composed of the main flame opening 2 and the flame holding opening 19, and the auxiliary flame opening portions Hs at five locations. Each of them is configured by the flame holding port 19 without providing the auxiliary flame port 4.

First, the burner cap Bc will be described. The burner cap Bc of the standard burner B2 will be described with reference to FIGS. 4, 6, and 8 to 10.
The burner cap Bc of the standard burner B2 has an axial center in the vertical direction in a state of communicating with an annular cap main body 5 whose axial center is oriented in the vertical direction in the central portion and a hole of the circular annular cap main body 5. It is manufactured by die-casting using aluminum as a material so as to integrally include a cap-side fitting portion cylindrical body 6 that faces downward and is continuous with the cap body 5. Then, the hole of the annular cap body 5 and the cylindrical hole of the cap-side fitting portion cylindrical body 6 are communicated with each other to form a secondary air hole 5B through which secondary air flows. or,
The cap-side fitting portion Sc is configured by the cap-side fitting portion cylindrical body 6.

The tip of the cap side fitting cylindrical body 6 is
An approximately half-circumferential portion is formed so as to retract along the vertical axis direction, and a concavo-convex portion 6A is formed at the tip of the cap-side fitting portion cylindrical body 6.

The upper part 5C of the cap body 5 is formed in a concave shape, that is, a mortar-like shape that is lowered toward the center side, and an annular thick-walled part 5A protruding downward is provided on the outer peripheral side of the lower part. The lower surface of the thick wall portion 5A is formed as an inclined surface that is located higher toward the outer side. Then, on the lower surface of the thick portion 5A of the cap body 5, a large number of main flame port vertical grooves 5a for forming the main flame port are obliquely upwardly provided at a portion corresponding to the main flame port portion Hm at intervals in the circumferential direction. And the concave portion 5 for flame holding channel is formed between the vertical grooves 5a for main flame openings.
b, and the auxiliary flame mouth part Hs other than for discharging the broth
A vertical groove 5h for auxiliary flame port is formed in a portion corresponding to. Incidentally, as shown in FIG. 3, on the lower surface of the thick wall portion 5A of the cap body 5, an ignition flame port groove for forming the ignition flame port 20 is provided at a position corresponding to the side where the ignition plug 14 is installed. 5d is formed.

The main flame port vertical groove 5a is formed obliquely upward so as to open on both the outer peripheral side and the inner peripheral side of the thick portion 5A, and the auxiliary flame port vertical groove 5h is formed on the thick portion 5A. It is formed on both the outer peripheral side and the inner peripheral side, and is formed obliquely upward so as to be shallower than the main flame port vertical groove 5a, and the flame holding channel recess 5b.
Is formed at the throttle inlet 5c by closing it on the outer peripheral side of the thick portion 5A, opening it on the inner peripheral side, and making the opening on the inner peripheral side narrower than the internal space of the flame holding channel recess 5b.

On the mortar-shaped upper portion 5C of the cap body 5,
The broth discharge groove 5e is formed so that the broth is guided and discharged to the outer peripheral portions corresponding to the two auxiliary flame mouth portions Hs for discharging the broth.
The hole edge portion of the secondary air hole 5B is erected in a cylindrical shape, and the cylindrical erected wall 5f is provided at the hole edge portion of the secondary air hole 5B. The cylindrical standing wall 5f is formed at substantially the same height as the outer peripheral edge of the mortar-shaped upper portion 5C of the cap body 5.

When the broth drainage groove 5e is added,
Two broth discharge grooves 5e are formed so as to extend in the radial direction toward the outer peripheral portions corresponding to the two auxiliary flame mouth portions Hs for broth discharge. The broth discharge groove 5e is formed by denting the mortar-shaped upper portion 5C of the cap body 5 in an inclined shape so as to be located lower toward the outer peripheral side, and further, on the end face portion of the thick portion 5A of the cap body 5, An eaves portion 5g is provided so as to project radially outward from the bottom of the radial tip of the concave portion forming the broth discharge groove 5e. Therefore, the broth discharge groove 5e is provided between the burner body Bm and the burner cap Bc. It is formed so as to project radially outward from the formed flame port H. The lower surface of the eaves portion 5g is formed in a state of being recessed upward. Specifically, the lower surface of the eaves portion 5g is recessed in a substantially inverted V shape when viewed in the circumferential direction.

The burner cap Bc of the high thermal power burner B1 will be described with reference to FIGS. 4, 7, 8, 11 and 12. Burner cap B of high thermal power burner B1
c is the same as the burner cap Bc of the standard burner B2,
The cap body 5 and the cap-side fitting portion cylindrical body 6 are provided, and the umbrella-shaped body 7 is further provided on the upper side of the tubular standing wall 5f of the cap body 5 by the three leg portions 30. The secondary air holes 5B are spaced apart from each other to allow the flow of secondary air.
It is supported to cover. And the umbrella-shaped body 7 is
The burner cap Bc is formed to have a diameter smaller than that of the secondary air hole 5B, and the burner cap Bc is made of aluminum so that it can be die-molded by die casting. Since the cap-side fitting portion cylindrical body 6 is similar to the burner cap Bc of the standard burner B2, its description is omitted.

As with the standard burner B2, the cap body 5
Upper part 5C is formed in a mortar shape that becomes higher toward the outer peripheral side,
An annular thick portion 5A that projects downward is provided on the outer peripheral side of the lower portion, and the lower surface of the thick portion 5A is formed as an inclined surface that is positioned higher toward the outer side. On the lower surface of the thick portion 5A of the cap body 5, as with the standard burner B2, the main flame port vertical groove 5a, the auxiliary flame port vertical groove 5h, and the flame holding channel recess 5 are formed.
b, an ignition flame port groove 5d is formed.

As with the standard burner B2, the cap body 5
In the mortar-shaped upper part 5C, the broth discharge groove 5e is formed so that the broth is discharged from the outer peripheral portions corresponding to the two auxiliary flame mouth portions Hs for discharging the broth, and the edge of the secondary air hole 5B is formed. The portion is erected in a cylindrical shape, and a cylindrical erected wall 5f is provided at the hole edge portion of the secondary air hole 5B. However, the cylindrical standing wall 5f
Is provided so as to be lower than the upper peripheral portion of the mortar-shaped upper portion 5C of the cap body 5.

The description of the broth drainage groove 5e is as follows:
The broth discharge groove 5e has an annular portion surrounding the outer periphery of the cylindrical standing wall 5f, one end communicates with the annular portion, and the other end has 2
It is configured by including two linear portions extending in the radial direction toward the outer peripheral portions corresponding to the respective auxiliary flame mouth portions Hs for discharging the broth. The straight broth discharge groove 5e is
The mortar-shaped upper portion 5C of the cap body 5 is formed by denting in an inclined shape so as to be located downward toward the outer peripheral side, and further, a straight broth discharge groove is formed on the end face portion of the thick portion 5A of the cap body 5. The eaves portion 5g is provided so as to project radially outward from the bottom of the radial tip of the concave portion forming 5e.
Similarly to the standard burner B2, in the high-power burner B1 as well, the broth discharge groove 5e is formed so as to project outward in the radial direction from the flame port H formed between the burner body Bm and the burner cap Bc. I am doing it. Also, the lower surface of the eaves portion 5g is
Similar to the standard burner B2, it is recessed in a substantially inverted V shape when viewed in the circumferential direction.

The standard burner B2 and the high thermal power burner B1 are apparent from the above description, but the common points of the burner B2 and the burner discharge groove 5e of the cap body 5 are described below. The flame holding channel concave portion 5b is formed in, but the main flame port vertical groove 5a and the auxiliary flame port vertical groove 5h are not formed.
A portion of the flame opening H that overlaps the broth discharge groove 5e when viewed from above and below does not have the main flame opening 2 and the auxiliary flame opening 4 and does not have the flame holding opening 1
9 is provided as an auxiliary flame mouth portion Hs for discharging the broth, and a portion which does not overlap with the broth discharge groove 5e in the vertical direction is provided with the main flame mouth 2 and the flame holding mouth 19 for discharging the broth. Main flame mouth portion H forming a larger flame than the auxiliary flame mouth portion Hs of
m, the auxiliary flame port 4 and the flame holding port 19 are provided to form a flame larger than the auxiliary flame port portion Hs for discharging the broth, and is configured as an auxiliary flame port portion Hs other than for the boiling liquid discharge.

As shown in FIGS. 13 and 14, the burner cap Bc of the small burner B3 has a disk-shaped cap main body 5 whose axial center is oriented in the vertical direction, and the axial center below the cap main body 5 in the vertical direction. It is manufactured by die-casting using aluminum as a material so as to integrally include the cylindrical body 8 for the cap-side fitting portion that is continuous and faces each other. And
The cap-side fitting portion Sc is configured by the cap-side fitting portion cylindrical body 8.

The cap-side fitting portion cylindrical body 8 is formed into a cracked tubular shape having a circular arc-shaped cross-section orthogonal to the vertical axis direction, and the crack-cylindrical cap-side fitting portion cylindrical body 8 is formed. The cracked portion 8 is configured to function as an opening 9 into which a protrusion 17 that forms a main body side fitting portion Sm described later is inserted. Further, the crack width of the cracked portion of the cap-side fitting portion cylindrical body 8 is made wider toward the tip end side of the cap-side fitting portion cylindrical body 8 so that the opening width of the opening portion 9 becomes smaller than that of the cap side fitting portion. The portion of the fitting portion cylindrical body 8 located closer to the distal end side is wider.

Like the cap body 5 of the standard burner B2, the cap body 5 of the small burner B3 is provided with a thick wall portion 5A, and the thick wall portion 5A is provided with a vertical groove 5a for the main flame port and a flame holding channel. A concave portion 5b and a throttle entrance 5c are formed.

Next, the burner main body Bm will be described. Since the burner main body Bm of the high heat power burner B1 and the standard burner B2 have the same structure, the burner main body Bm of the high heat power burner B1 and the standard burner B2 will be described. For the standard burner B2, Figs. 3 to 5, 9 and 10
The burner body Bm of the small burner B3 will be described with reference to FIGS. 13 and 14.

As shown in FIG. 3 to FIG. 5, FIG. 9 and FIG. 10, the burner body Bm of the high thermal power burner B1 and the standard burner B2 comprises a mixing tube 10 and a burner base 11 connected to the mixing tube 10. Is integrally formed by die-casting with aluminum as a material. The mixing pipe 10 is provided with a supply port 10i through which gas fuel is jetted and supplied from a gas nozzle (not shown) and primary air is sucked along with the jetted supply of the gas fuel, and is supplied from the supply port 10i. The gas fuel and the primary air are mixed. The burner base 11 is
A mixed gas distribution chamber 1 having a cylindrical inner circumferential wall 12 whose axis is oriented in the up-down direction and having a generally circular ring-shaped opening with an upper opening formed inside is formed in the mixed gas distribution chamber 1.
The mixed gas is supplied from the mixing pipe 10. Then, the cylindrical inner peripheral wall 12 of the burner base 11
Is formed so that the cap-side fitting portion cylindrical body 6 of the burner cap Bc can be fitted therein, and the inner peripheral wall 12 is formed into a body-side fitting portion Sm. The cylindrical body 12 for main body side fitting portion is provided with a ridge 12a projecting inward over the half circumference thereof. is there.

A recess for forming the mixed gas distribution chamber 1 is formed in the central portion of the burner base 11, and the upper portion of the burner base 11 is formed in a mortar shape which becomes higher toward the outer peripheral side, and the mortar-shaped upper portion of the burner base 11 is formed. Is configured to function as a flame port forming portion 13 that forms a flame port H between the burner body Bm and the burner cap Bc.

Further, in the present invention, in each of the high thermal power burner B1, the standard burner B2 and the small burner B3, the flame port forming portion 13 of the burner base 11 is projected outward from the burner cap Bc and the flame port H is formed. It is configured to include the overhanging portion 26 located on the lower side than the above, and further, in each of the high thermal power burner B1 and the standard burner B2, the overhanging portion 26 corresponds to the auxiliary flame port portion Hs for discharging the broth. The overhanging portion 26s (hereinafter, may be referred to as the overhanging portion 26s corresponding to the broth discharge portion),
Auxiliary flame mouth portion Hs and main flame mouth portion Hm other than for discharging broth
It is configured so as to project outwardly from the overhanging portion 26b corresponding to the above (hereinafter sometimes referred to as the overhanging portion 26b corresponding to the main flame opening portion).

A concave groove 13a is formed on the outer peripheral side of the flame opening forming portion 13 of the burner base 11 so as to extend over substantially the entire circumference.
The height of the protrusion 13b that surrounds the outside of the groove 13a is approximately the same as the height of the side wall portion 13c that surrounds the inside of the groove 13a. The ridge 13b surrounding the outside of the groove 13a is
The burner cap Bc is formed so as to be located immediately below the outer peripheral edge portion of the cap body 5 in a state where the burner cap Bc is mounted on the burner body Bm. Further, in the outer peripheral portion of the ridge portion 13b of the flame mouth forming portion 13 of the burner base 11, the portions corresponding to the auxiliary flame mouth portion Hs and the main flame mouth portion Hm except for two places for discharging the broth are the ridge portions. 13b, which is lower than 13b and protrudes outward from the ridge 13b, is formed as a downward step, and the downward step is caused to function as a projecting portion 26b corresponding to the large flame mouth portion. In the outer peripheral portion of the ridge portion 13b of the flame mouth forming portion 13 of the burner base 11, the portions corresponding to the two auxiliary flame mouth portions Hs for discharging the broth are higher than the overhang portions 26b corresponding to the large flame mouth portion. Is formed in a downward step portion that is low in height and projects outward from the overhang portion 26b corresponding to the large flame mouth portion, and the downward step portion functions as the overhang portion 26s corresponding to the broth discharge portion. I am doing it. Also, the overhanging portion 26s corresponding to the broth discharge portion
A groove 27 is provided along the circumferential direction and is open at both circumferential ends. In short, of the overhanging portion 26,
The overhanging portion 26s corresponding to the broth discharge portion is configured to project outward from the overhanging portion 26b corresponding to the large flame mouth portion.

Further, as shown in FIG. 3, the burner base 1
A plug insertion hole 15 for vertically inserting the ignition plug 14 is formed on the outer side of the first mixed gas distribution chamber 1, and a plug cover 16 is provided so as to cover the upper opening of the plug insertion hole 15. The plug cover 16 is provided with a target electrode 16a facing the discharge electrode 14a of the spark plug 14.

As shown in FIGS. 13 and 14, the burner body Bm of the small burner B3 is connected to the mixing pipe 10 and the mixing pipe 10 like the burner body Bm of the high thermal power burner B1 and the standard burner B2. The burner base 11 and the burner base 11 are integrally formed by die-casting using aluminum as a material. Small burner B3 mixing tube 1
0 is a mixing tube 1 for high-power burner B1 and standard burner B2
It has the same configuration as 0. The burner base 11 of the small burner B3 is formed in a generally cylindrical shape having a bottom with an open upper portion, and the inside thereof serves as the mixed gas distribution chamber 1 so that the mixed gas is supplied from the mixing pipe 10. On the burner base 11 of the small burner B3, the protruding portion 1 protruding from the inner peripheral wall
7 and a cylindrical body-side fitting portion shaft body 18 extending upward from the tip of the projecting portion 17 in the projecting direction. The main body side fitting portion shaft body 18 is a burner cap Bc.
It is formed so that the cap side cylindrical body 8 can be externally fitted. Then, the projecting portion 1 projecting the projecting portion 17 from a part of the main body side fitting portion shaft body 18 in the circumferential direction.
The main body side fitting portion Sm is configured to include the main body side fitting portion shaft body 18 and the protruding portion 17.

The burner base 11 of the small burner B3 is provided with a plug insertion hole 15, a plug cover 16, and a target electrode (not shown), like the high thermal power burner B1 and the standard burner B2. Further, like the high-burner B1 and the standard burner B2, the upper part of the burner base 11 of the small burner B3 is formed in a mortar shape that becomes higher toward the outer peripheral side,
The mortar-shaped upper portion of the burner base 11 is configured to function as a flame port forming portion 13 that forms a flame port H between the burner base 11 and the burner cap Bc in the burner body Bm. Further, in the flame port forming portion 13 of the burner base 11, as with the high thermal power burner B1 and the standard burner B2, the concave groove 13a is formed.
The protrusion 13b that surrounds the outer side of the groove 13a is formed, and the protrusion 26 that extends outward from the burner cap Bc and that is located below the flame port H is the same over the entire circumference. The amount of overhang is set.

Next, the burner cap Bc is attached to the burner body B.
A method of assembling the m into the mounted state will be described. As shown in FIGS. 3, 4, and 9 to 12, in the high thermal power burner B1 and the standard burner B2, the cylindrical body 6 for the cap side fitting portion of the burner cap Bc is attached to the burner body Bm.
Of the burner cap Bc and the inner peripheral surface of the main body-side fitting portion cylindrical body 12 and the outer peripheral surface of the cap-side fitting portion cylindrical body 6. By the treatment of
The burner body Bm is rotated while being guided around the vertical axis along the vertical direction, and the phase is adjusted to a specific phase. When the burner cap Bc is adjusted to a specific phase with respect to the burner body Bm, the protrusion of the body-side fitting portion cylindrical body 12 is inserted into the concave portion of the uneven portion 6A at the tip of the cap-side fitting portion cylindrical body 6. The burner cap Bc can be moved closer to the burner body Bm by engaging the portion 12a, and the main body side can be attached to the bottom surface of the concave portion of the concave-convex portion 6A at the tip of the cap-side fitting cylindrical body 6. Ridge portion 12a of the cylindrical body 12 for fitting portion
Are in contact with each other (this state corresponds to a proper fitting state), and the burner cap Bc is fixed in a state in which it is positioned in the horizontal direction with the burner body Bm positioned in a specific phase. The cap Bc is assembled to the burner body Bm in a mounted state with the burner body Bm positioned in a specific phase.

The burner cap Bc is phase-adjusted with respect to the burner main body Bm to a phase other than a specific phase, and the convex portion of the concave-convex portion 6A at the tip of the cap-side fitting portion cylindrical body 6 becomes the main-body-side fitting portion. When the burner cap Bc is in contact with the projection 12a of the cylindrical body 12 for use (corresponding to an improper fitting state), the burner cap Bc is set so that the ignition cannot be performed even if the ignition operation is performed by the ignition plug 14. Concavo-convex portion 6A at the tip of the cap-side fitting portion cylindrical body 6 so as to be separated from the burner body Bm.
Also, the ridge portion 12a of the main body side fitting portion cylindrical body 12 is set.

As shown in FIGS. 13 and 14, in the small burner B3, the cap side fitting portion cylindrical body 8 of the burner cap Bc is connected to the body side fitting portion shaft 1 of the burner body Bm.
8, the burner cap Bc is moved up and down in the burner body Bm by abutting the outer peripheral surface of the main body side fitting portion shaft body 18 and the inner peripheral surface of the cap side fitting portion cylindrical body 8. It is rotated while being guided around the vertical axis along the direction, and the phase is adjusted to a specific phase. Burner cap Bc to burner body B
When the phase is adjusted to a specific phase with respect to m, the main body side fitting portion shaft body 18 is inserted into the opening 9 of the cap side fitting portion cylindrical body 8.
Insert the protrusion 17 that protrudes from a part of the
It becomes possible to move the burner cap Bc closer to the burner body Bm, and the protrusion 17 comes into contact with the upper surface of the opening 9 of the cap-side fitting portion cylindrical body 8. Bc is fixed in a state of being positioned horizontally with respect to the burner body Bm in a specific phase, and thus the burner cap Bc is placed in a state of being positioned in a specific phase with respect to the burner body Bm. Be assembled into.

The burner cap Bc is adjusted to a phase other than the specific phase with respect to the burner body Bm, and the tip of the cap-side fitting portion cylindrical body 8 is in contact with the protruding portion 17 (inappropriate fitting). (Corresponding to the combined state), the spark plug 14
So that ignition is impossible even if the ignition operation is performed,
The opening 9 and the protrusion 17 are set in order to separate the burner cap Bc from the burner body Bm.

That is, the high burner B1 and the standard burner B
In 2 and the small burner B3, the body-side fitting portion Sm and the cap-side fitting portion Sc are phase-adjusted with respect to the burner body Bm to a specific phase around the vertical axis along the vertical direction. At this time, the burner cap Bm is fitted in the proper fitting state in which it is placed, and is not fitted in the proper fitting state in phases other than the specific phase.

Then, as described above, the burner cap Bc
When assembled to the burner body Bm, in the high thermal power burner B1, the standard burner B2, and the small burner B3, similarly, the main flame port vertical groove 5a and the flame holding flow path of the cap body 5 of the burner cap Bc are similarly provided. The concave portion 5b and the flame port forming portion 13 of the burner base 11 of the burner body Bm form the main flame port 2, the flame holding channel 3, and the ignition flame port 20 which communicate with the mixed gas distribution chamber 1. However, in the case of the high thermal power burner B1 and the standard burner B2, the burner cap Bc
The auxiliary flame port 4 is formed by the auxiliary flame port vertical groove 5h of the cap body 5 and the flame port forming portion 13 of the burner base 11 of the burner body Bm.

Further, the protrusion 13b of the flame port forming portion 13 of the burner base 11 is positioned so as to follow the outer peripheral edge of the thick portion 5A of the cap body 5, and the groove 1 of the base surface 13 is formed.
By arranging 3a on the inner side of the outer peripheral edge of the thick portion 5A of the cap body 5, the concave groove 13a is communicated with the main flame port 2 and the flame holding channel 3. Furthermore, by making the height of the protruding portion 13b substantially the same as the height of the side wall portion 13c that surrounds the inside of the concave groove 13a, the flame port forming portion 13 of the burner base 11 and the thick portion 5A of the cap body 5 are formed. A gap is formed between the lower surface and the lower surface over substantially the entire circumference and in a state of communicating with the main flame opening 2 and the flame holding passage 3.
It is configured to function as.

Next, a high thermal power burner B1 and a standard burner B2
The combustion mode in the small burner B3 will be described.
Since the combustion forms of the high thermal power burner B1 and the standard burner B2 are the same, the combustion forms of the high thermal power burner B1 and the standard burner B2 will be collectively described with reference to FIGS. In addition, in the high thermal power burner B1 and the standard burner B2, FIG. 9 to FIG. 12 and FIG. 15 to FIG.
In the secondary air discharge port 24 of the secondary air flow path 25 formed between the top plate 21 and the soup tray 23, the secondary air is discharged from the burner body Bm as indicated by the dashed arrow in FIG.
Is supplied upward along the outer periphery of the burner cap Bc, and is also supplied through the secondary air holes 5B of the burner cap Bc.

When the mixed gas is supplied to the mixed gas distribution chamber 1, the mixed gas is mixed with the main flame port 2, the auxiliary flame port 4, and the ignition flame port 20.
When it is ejected from the flame-holding flow path 3 through the throttle inlet 5c and is depressurized in the flame-holding flow path 3, it is discharged from the flame-holding opening 19 and the ignition plug 14 performs the ignition operation. The mixed gas ejected from the ignition flame port 20 burns to form an ignition flame, and the ignition flame transfers to the mixed gas ejected from the main flame port 2, the auxiliary flame port 4, and the flame stabilizing port 19,
A main flame F1 is formed by the main flame opening 2, an auxiliary flame (not shown) smaller than the main flame F1 is formed by the auxiliary flame opening 4, and a flame holding F2 is formed by the flame holding opening 19 to burn the whole. To do. A main flame F1 is formed obliquely upward by each main flame port 2, and an auxiliary flame is obliquely formed upward by each auxiliary flame port 4. In this case, a part of the mixed gas flowing through the flame holding channel 3 has a flame holding port 19 between the main flame ports 2 and between the main flame port 2 and the auxiliary flame port 4.
Is discharged from the main flame openings 2 and between the main flame openings 2 and the auxiliary flame openings 4, flame holding F2 is formed, and by the ejector action of the mixed gas flowing through the main flame openings 2 and the auxiliary flame openings 4. A part of the mixed gas flowing through the flame holding channel 3 flows through the groove 13a to the flame holding port 19 below the main flame port 2 and the auxiliary flame port 4, and is discharged from the flame holding port 19 and the main flame port 2 and Since the flame holding F2 is also formed below the auxiliary flame port 4, the flame holding F2 is formed over substantially the entire circumference. Therefore, the flame holding F2 is formed below the main flame opening 2 and the auxiliary flame opening 4, and the main flame opening 2 and the auxiliary flame opening 4 are formed.
Since the mixed gas ejected from the fuel burns in a state where the flame is held by the flame holding F2, the lift is suppressed and stable combustion is performed. or,
Since the flame holding F2 is formed below the main flame opening 2 as well, the flame holding F2 formed between the main flame openings 2 can be made small, so that the secondary air can be smoothly supplied to the main flame F1. Therefore, it becomes possible to further improve the combustion stability. Further, since the mixed gas is supplied to the flame holding channel 3 through the throttle inlet 5c, the mixed gas is depressurized in the flame holding channel 3, so that the mixed gas from the flame holding channel 3 becomes more uniform. Since it is supplied to the concave groove 13a and the flame holding port 19 with the changed pressure, and the discharge of the mixed gas from the flame holding port 19 is stabilized,
The flame stabilizer F2 is stably formed, which also makes it possible to further improve the stability of combustion.

In addition, the main flame port 2, the auxiliary flame port 4, and the flame retaining port 19
Since the overhanging portion 26 located below is provided, immediately after the combustion amount is reduced, a large amount of secondary air flows along the outer peripheral portion of the burner body Bm corresponding to the state in which the combustion amount is large. Even if the main flame F1, the auxiliary flame, and the flame holding F2 become small in the state, it is possible to suppress the main flame F1, the auxiliary flame, and the flame holding F2 from being agitated by the secondary air. Since it is located below the flame port 2, the auxiliary flame port 4, and the flame holding port 19, even when the combustion amount is increased and the main flame F1 and the auxiliary flame become longer, the main flame F1 and the auxiliary flame are The secondary air is appropriately supplied without being insufficient, and the secondary air is restrained from clinging to the overhanging portion 26 and is formed upward. Moreover, since the bulging portion 26s corresponding to the broth discharge portion is configured to project outward than the bulging portion 26b corresponding to the large flame mouth portion, it is formed by the auxiliary flame mouth portion Hs for discharging broth. Since the flame-holding F2 has a large protrusion amount of the protrusion 26s corresponding to the broth discharge portion, it is more effectively suppressed from being fanned by the secondary air flowing upward along the outer peripheral portion of the burner body Bm, and the main flame The main flame F1 formed at the mouth portion Hm has a small protrusion amount of the protrusion portion 26b corresponding to the large flame portion, so that the main flame F1 is appropriately supplied without a shortage of secondary air, and The sticking to the overhanging portion 26b is further effectively suppressed, the lateral direction of the main flame F1 is further suppressed, and it is easier to form the main flame F1 upward.

In the high heat burner B1 and the standard burner B2, the cylindrical standing wall 5f is formed even if the boiling liquid spills from the heating and cooking container to the mortar-shaped upper portion 5C of the burner cap Bc.
While being prevented from falling into the secondary air hole 5B, the broth is flowed down and discharged from the outer peripheral portion of the burner cap Bc through the broth discharge groove 5e. Then, the squeeze drainage groove 5e extends the simmered juice 26s corresponding to the broth drainage portion.
Even when it is dropped upward, the overhanging portion 26s is formed lower than the flame port H, and the recessed groove 7 is formed in the overhanging portion 26s.
Since the liquid is formed and the broth is dropped through the concave groove 7, it is suppressed that it enters the flame mouth H, and the clogging of the flame mouth H is suppressed. Further, even if the broth drops on the overhanging portion 26b corresponding to the large flame mouth portion, since the overhanging portion 26b is formed lower than the flame mouth H, entry into the flame mouth H is suppressed, The clogging of the flame mouth H is suppressed.

In the small burner B3, the high fire power burner B is used.
1 and the standard burner B2, the auxiliary flame mouth portion Hs for discharging the broth is not provided, and the overhanging portion 26 is provided with the same overhanging amount over substantially the entire circumference. Therefore, in the main flame mouth portion Hm. Is burned at the main flame opening 2 and the flame holding opening 19 as in the case of the high thermal power burner B1 and the standard burner B2 shown in FIG. 15 and FIG. Similar to the combustion mode shown, flame holding port 1
Burns at 9. However, in the small burner B3, the secondary air is discharged from the secondary air discharge port 24 of the secondary air flow path 25 formed between the top plate 21 and the juice receiving tray 23.
It is supplied upward along the outer peripheral portion of the burner body Bm.

In the small burner B3, the overhanging portion 26 located below the main flame opening 2 and the flame holding opening 19.
As a result, the main flame F1 and the flame holding F2 are provided immediately after the combustion amount is reduced in a state where a large amount of secondary air flows along the outer peripheral portion of the burner body Bm corresponding to the state where the combustion amount is large. Even when the main flame F1 and flame holding F2 are reduced, it is possible to suppress the main flame F1 and flame holding F2 from being blown by the secondary air, and the projecting portion 26 is located below the main flame opening 2 and the flame holding opening 19. Therefore, even when the combustion amount is increased and the main flame F1 is lengthened, the main flame F1 is suppressed from clinging to the overhang portion 26 and is formed upward. Further, even if the broth drops on the overhanging portion 26, since the overhanging portion 26 is formed lower than the flame opening H, it is suppressed from entering the flame opening H and the flame opening H is clogged. Is suppressed.

The second and third embodiments of the present invention will be described below. In each embodiment, the overhanging portion 26 is used.
Since the second embodiment is the same as the first embodiment except that the configuration is different, description and illustration are omitted for the same components or components having the same action in order to avoid redundant description.
The overhanging portion 26 will be mainly described.

[Second Embodiment] In the second embodiment, as shown in FIGS. 19 and 20, a high thermal power burner B1 is used.
In each of the standard burner B2 and the standard burner B2, the flame port forming portion 13 that forms the flame port H between the burner body Bm and the burner cap Bc is located outside the burner cap at the same height as the lower edge of the flame port H. It is provided so as to be provided with an overhanging portion 26 projecting toward one side, and of the overhanging portion 26, an overhanging portion 26s corresponding to the auxiliary flame mouth portion Hs for discharging the broth is
It is configured so as to project outward from the overhanging portion 26b corresponding to the other auxiliary flame opening portion Hs and the main flame opening portion Hm. In addition, in each of the high thermal power burner B1 and the standard burner B2, in the flame mouth forming portion 13 of the burner base 11, a portion surrounding the outer side of the concave groove 13a,
The protrusion 13 as in the first embodiment is formed in a plane shape having substantially the same height as the height of the side wall portion 13c surrounding the inside of the groove 13a.
b is not formed, and the planar portion thereof is the overhanging portion 26.

[Third Embodiment] In the third embodiment, as shown in FIGS. 21 and 22, in the small burner B3, a flame opening H is formed between the burner body Bm and the burner cap Bc. The forming portion 13 is configured to include an extending portion 26 that extends outward from the burner cap Bc and that is located below the flame port H.
The projecting portion 26s corresponding to the auxiliary flame opening portion Hs is configured to project outward from the projecting portion 26b corresponding to the main flame opening portion Hm. The overhanging portion 26s corresponding to the auxiliary flame opening portion Hs has the same structure as the overhanging portion 26s corresponding to the broth discharging portion in the first embodiment.

[Other Embodiments] Next, other embodiments will be described. (A) The overhanging portion 26 can be configured in various ways other than the configurations illustrated in the above-described embodiments.
For example, in the above-described first embodiment, even in the high-power burner B1 and the standard burner B2, as with the small burner B3, the overhang outside the burner cap Bc and below the flame port H is overhang. The portion 26 may be provided with the same protrusion amount over substantially the entire circumference.

Further, in the above-described first embodiment, the protruding portion 26s corresponding to the broth discharging portion is provided so as to be lower in height than the protruding portion 26b corresponding to the large flame mouth portion. The protruding portion 26s may be provided at the same height as the protruding portion 26b corresponding to the large flame mouth portion.

Further, in the above-described third embodiment, the flame opening forming portion 13 of the small burner B3 is provided with an overhanging portion 26 which extends outward from the burner cap Bc and is located below the flame outlet H. And its overhanging portion 2
6, the overhanging portion 26 corresponding to the auxiliary flame opening portion Hs
The case where s is configured to project outward from the overhanging portion 26b corresponding to the main flame opening portion Hm has been exemplified, but instead of this, the flame opening forming portion 13 is provided at the lower edge of the flame opening H (specifically, Specifically, the auxiliary flame outlet portion Hs of the protrusion 26 is configured to be provided with an overhanging portion 26 projecting outward from the burner cap Bc at the same height as the flame retaining opening 19). The overhanging portion 26s corresponding to the main flame mouth portion H
It may be configured so as to project outward from the overhanging portion 26b corresponding to m. In addition, in the flame mouth forming portion 13 of the burner base 11, the portion surrounding the outer side of the groove 13a is formed in a flat shape having substantially the same height as the height of the side wall portion 13c enclosing the inner side of the groove 13a. The projecting portion 13b as in the above embodiment is not formed, and the planar portion thereof is used as the projecting portion 26.

(B) Of the five auxiliary flame mouth portions Hs, the overhanging portions 26 corresponding to the three auxiliary flame mouth portions Hs other than the auxiliary flame mouth portions Hs for discharging the broth are also bulges corresponding to the broth discharge portion. Similar to the portion 26s, it may be configured so as to project outward from the projecting portion 26 corresponding to the main flame opening portion Hm. In addition, in the above-described embodiment, the auxiliary flame opening portions Hs at two of the five auxiliary flame opening portions Hs are provided.
Although the case where the broth discharge groove 5e is provided corresponding to the above is illustrated, the broth discharge groove 5e is provided corresponding to one auxiliary flame mouth portion Hs out of the five auxiliary flame mouth portions Hs,
It may be provided corresponding to three or more auxiliary flame mouth portions Hs. And the auxiliary flame mouth part Hs provided with the broth discharge groove 5e
The overhanging portion 26 corresponding to the above may be configured as the overhanging portion 26s corresponding to the squeeze draining portion projecting outward than the overhanging portion 26 corresponding to the main flame mouth portion Hm, as in the above embodiments.

(C) The present invention is a so-called three-port gas stove equipped with three burners B as exemplified in the above embodiment, and a so-called two-port gas stove equipped with two burners B. It is also possible to apply to a gas stove burner of various gas stoves such as a so-called single-port gas stove equipped with one burner B.

[Brief description of drawings]

FIG. 1 is a perspective view of a gas stove provided with a burner for a gas stove according to the present invention.

FIG. 2 is a plan view of a main part of a gas stove provided with a gas stove burner according to the first embodiment.

FIG. 3 is a vertical cross-sectional view of a main part of a gas stove provided with a burner for a gas stove according to the first embodiment.

FIG. 4 is an exploded perspective view of a main part of the gas stove burner according to the first embodiment.

FIG. 5 is a plan view showing a burner body of the gas stove burner according to the first embodiment.

FIG. 6 is a plan view of a burner cap of the gas stove burner according to the embodiment.

FIG. 7 is a plan view of a burner cap of the gas stove burner according to the embodiment.

FIG. 8 is a bottom view of the burner cap of the burner for a gas stove according to the embodiment.

9 is a view taken in the direction of arrows X-O-Y in FIG.

FIG. 10 is a view on arrow V-O-W in FIG.

FIG. 11 is a view on arrow X-O-Y in FIG.

FIG. 12 is a view as seen in the direction of the arrow VOW in FIG.

FIG. 13 is an exploded perspective view of a main part of the gas stove burner according to the first embodiment.

FIG. 14 is a vertical cross-sectional view of a main part of the burner for a gas stove according to the first embodiment.

FIG. 15 is a vertical cross-sectional view of a main portion of the gas stove burner according to the first embodiment.

FIG. 16 is a vertical cross-sectional view of a main part of the burner for a gas stove according to the first embodiment.

FIG. 17 is a vertical cross-sectional view of a main part of the gas stove burner according to the first embodiment.

FIG. 18 is a perspective view of a main part of the gas stove burner according to the first embodiment.

FIG. 19 is a vertical cross-sectional view of a main part of the burner for a gas stove according to the second embodiment.

FIG. 20 is a vertical cross-sectional view of a main part of the burner for a gas stove according to the second embodiment.

FIG. 21 is a plan view showing a burner body of a gas stove burner according to a third embodiment.

FIG. 22 is a vertical cross-sectional view of the main part of the gas stove burner according to the third embodiment.

FIG. 23 is a vertical cross-sectional view of a main part of a conventional gas stove burner.

[Explanation of symbols]

2 Main flame mouth 3 Flame holding channel 10 mixing tubes 13 Flame formation part 13a groove 19 Flame retaining mouth 26 Overhanging part 26b Overhang corresponding to the main flame mouth 26s Overhanging part corresponding to auxiliary flame mouth part 27 groove Bc burner cap Bm burner body H flame mouth Hm main flame mouth part Hs auxiliary flame mouth part

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Takahito Yokoyama             3-2-1 Kasuga Minami, Konohana-ku, Osaka City, Osaka Prefecture             Issue Harman Pro Co., Ltd. (72) Inventor Takamasa Sumikawa             3-2-1 Kasuga Minami, Konohana-ku, Osaka City, Osaka Prefecture             Issue Harman Pro Co., Ltd. F-term (reference) 3K017 AA02 AB02 AD01 AD11

Claims (5)

[Claims] 1. A burner main body and a burner cap mounted on the burner main body and assembled in a mounted state are provided, and a flame port for forming a flame toward the outside between the burner main body and the burner cap. Is a burner for a gas stove formed along the circumferential direction, wherein the flame port is provided with a flame holding port formed in a gap between an outer peripheral lower portion of the burner cap and the burner body. A flame opening forming portion that forms the flame opening between the burner body and the burner cap is provided with an overhanging portion that projects outward from the burner cap and is located below the flame opening. Burner for gas stove configured. 2. A burner main body and a burner cap mounted on the burner main body and assembled in a mounted state are provided, and a flame port that forms a flame toward the outside between the burner main body and the burner cap. Is a burner for a gas stove formed along the circumferential direction, the flame port is configured to include a main flame port portion and an auxiliary flame port portion that forms a flame smaller than the main flame port portion, A flame port forming portion that forms the flame port between the burner body and the burner cap is provided so as to include a projecting portion that projects outward from the burner cap. A burner for a gas stove configured such that an overhanging portion corresponding to the flame opening portion projects further outward than an overhanging portion corresponding to the main flame opening portion. 3. A burner main body and a burner cap mounted on the burner main body and assembled in a mounted state are provided, and a flame port for forming a flame toward the outside between the burner main body and the burner cap. Is a burner for a gas stove formed along the circumferential direction, the flame port is configured to include a main flame port portion and an auxiliary flame port portion that forms a flame smaller than the main flame port portion, A flame port forming portion that forms the flame port between the burner body and the burner cap is provided with a projecting portion that projects outward from the burner cap and is located below the flame port. A burner for a gas stove configured such that an overhanging portion of the overhanging portion, which corresponds to the auxiliary flame port portion, projects further outward than an overhanging portion corresponding to the main flame port portion. 4. The burner for a gas stove according to claim 2, wherein the projecting portion corresponding to the auxiliary flame opening portion is provided with a concave groove along the circumferential direction and open at both circumferential ends thereof. 5. The burner body and the burner cap in a state where the flame port communicates with a plurality of main flame ports provided at intervals in the circumferential direction and a lower portion of the plurality of main flame ports. It is configured to include a flame holding port formed in a gap shape over the entire circumference or substantially the entire circumference in the outer peripheral portion between and, in the portion forming the flame holding port in the flame opening forming portion of the burner body, A groove is provided over the entire circumference or substantially the entire circumference in the circumferential direction, and between the main flame ports adjacent to each other in the circumferential direction, the flame holding flow path to which the gas fuel is supplied from the mixing pipe is the concave. The burner for a gas stove according to any one of claims 1 to 4, which is provided so as to communicate with the groove.