JPH09303718A - Burner, and combustion equipment and cooking appliance using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a thin and compact burner which can ensure a wide combustion range and a uniform distribution of radiation and to obtain a gas cooking appliance which necessitates no gas governor, of which the cost is low and which has an excellent cooking performance, by using this burner. SOLUTION: Closed cells 24 are provided inside a combustion board 23 with a cell percentage of 70-80vol.%, while the ratio of board thickness/burner port 22 size of the combustion board 23 is made 8-10, and a beltlike burner port part 25 is provided in the outer periphery of the combustion board 23. A part surrounded by the beltlike burner port part 25 is made a first burner-port-less part 26, while second burner-port-less parts 27 are provided between parts of the beltlike burner port part 25 and the outer periphery of the combustion board 23. According to this constitution, backfire can be prevented even when a burner is made to be of a thin type, and a uniform distribution of radiation can be realized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a burner using gas or the like as a fuel and a cooker using the burner.

[0002]

2. Description of the Related Art A conventional burner and cooker will be described below.

FIG. 9 shows a sectional view of a main part of a conventional burner.
In a conventional burner 90, a large number of flame openings 92 are provided in a plate-shaped molded body 91 of silicon oxide-aluminum oxide short fibers, and the surface portion of the plate-shaped molded body 91 is impregnated with a silicon oxide film 93 of about 10 microns. (See, for example, Japanese Patent Laid-Open No. 62-297611).

With this structure, even if a flame is formed at the flame port 92 due to combustion, the temperature difference between the combustion surface and the back surface at the flame port 92 can be increased, and flashback can be prevented even if the plate thickness is reduced. Since the silicon oxide film 93 is further formed on the surface portion of the silicon oxide-aluminum oxide short fiber plate-shaped molded body 91, the silicon oxide film 93 is likely to crack during repeated thermal expansion and contraction. However, there is a defect that the silicon oxide film 93 is peeled off, and a poor combustion occurs or a backfire easily occurs, which causes deterioration over time.

Further, as shown in FIGS. 10 and 11, on the combustion surface of the combustion plate 102 disposed in the burner main body 101, a convex portion 104 having a flame opening 103 and a concave portion 1 having no flame opening 1 are formed.
The burner 106 having a configuration in which the No. 05 and the No.
There is a cooker 108 installed inside 07, and usually the burner 1
A gas switching device 110 for a burner, which is connected to a gas flow path 111 and has a pressure regulator 109 such as a gas governor built therein.
Is provided on the downstream side of the burner 106 on the downstream side (for example, JP-A-1-234).
707).

[0006] In this structure, the flammability is ensured by alternately sandwiching the concave portion 105 with the flameless opening area and the portion having the reduced heat capacity by the convex portion 104 provided with the flame opening 103. Is the burning surface,
If the central portion of the combustion surface is inevitably heated and the amount of combustion is increased, the flashback is likely to occur from the central portion of the combustion surface, so that it is necessary to keep the thickness of the combustion plate 102 thick to some extent (in practice, 13). Approximately 15 mm is also required). On the other hand, if the amount of combustion is reduced, the combustion plate 10 will be used because of the above-mentioned plate thickness.
The peripheral edge portion of No. 2 was most affected by the cooling action, and thus deteriorated the overall combustibility. Thus, in order to prevent flashback, the range of variable combustion amount was narrowed as a result. Therefore, the gas governor 109 is indispensable in the gas flow passage 111 connected to the burner 106, resulting in a significant cost increase. Furthermore, since the thickness of the combustion plate 102 is increased, the ventilation resistance when the fuel premixture passes through the flame port 103 also increases, and the mixing pipe length of the burner body 101 is increased in order to secure an ideal combustion air amount. Since the length of the burner 106 needs to be long, the burner 106 must be thick and large. Burner 1 like this
When 06 is applied to the baking cooker 108 that requires a wide range of heat power adjustment and a sufficient internal volume, a good cooking result cannot be obtained and a wide cooking menu cannot be supported due to the internal volume. In addition to the above issues, there was the issue of cost increase.

[0007]

As described above, according to the conventional configuration, the burner 90 is configured such that the burner 90 is made of silicon oxide-aluminum oxide while the plate-shaped molded body 91 of short fibers repeats thermal expansion and contraction. The film 93 is likely to be cracked, resulting in the peeling of the silicon oxide film 93, resulting in poor combustion or easy backfire and deterioration over time. Board 10
In order to prevent flashback from 2, it is necessary to increase the plate thickness of the combustion plate 102, which narrows the combustion amount variable range, and in order to prevent unstable combustion due to pressure fluctuation, the gas flow path 111 In addition, there is a problem that the gas governor 109 is required.

The present invention solves the above-mentioned problems of the prior art by improving the combustibility of a combustion disc to ensure a wide combustion amount variable range and a uniform radiation distribution, and as a result, a gas governor is provided in the gas flow path. It realizes a low-cost configuration that does not need to be used, and also realizes a thinner combustion plate to reduce the ventilation resistance when the fuel premixture passes through the flame mouth, resulting in quick combustion and wide range of combustion on the entire combustion surface. We provide a thin and compact burner that not only reduces the amount of unburned components such as CO, but also suppresses flashback and can handle a variety of fuels by using the burner as a cooking burner. An object of the present invention is to provide a cooker capable of obtaining various cooking results.

[0009]

In order to solve the above-mentioned problems, the present invention has improved the heat insulation performance of a combustion board. For that purpose, a large number of air bubbles are provided on the combustion board, and the air bubble ratio is 60 to 8
In addition to 0% by volume, the ratio of the burner plate thickness / flame diameter is 8
The configuration is set to 10. With this configuration, a combustion board with high heat insulation performance can be obtained, flashback can be prevented, and the heat capacity of the entire combustion board is reduced, so that CO emission can be suppressed even with a low combustion amount.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention comprises a combustion plate having a flame outlet and a burner case for accommodating the combustion plate. The inside of the combustion plate is provided with air bubbles and the bubble ratio is 60 to 80% by volume. Furthermore, the ratio of the thickness of the combustion plate to the flame diameter is 8 to 10
And the configuration.

Further, it comprises a combustion plate having a flame port and a burner case for accommodating the combustion plate, and bubbles are provided inside the combustion plate so that the bubble rate is 60 to 80% by volume, and the thickness of the combustion plate corresponds to the flame aperture. The ratio is 8 to 10, and a band-shaped flame opening is provided on the outer circumference of the combustion plate, and a portion surrounded by the band-shaped flame opening is defined as a first flameless opening, and a part of the band-shaped flame opening and the outer circumference of the combustion plate. A second flameless opening is provided between the two.

Further, the combustion disc is provided with a flame port and a burner case for accommodating the combustion disc, and independent bubbles which are not continuous with each other are provided inside the combustion disc, and the inside of the bubbles is evacuated.

Further, it comprises a combustion disc provided with a flame port and a burner case for accommodating the combustion disc. Bubbles are provided inside the combustion disc, and an infrared absorbing film is formed on at least the surface of the burner case facing the combustion disc. It was configured.

Further, it comprises a combustion disc having a flame outlet and a burner case for accommodating the combustion disc. Bubbles are provided inside the combustion disc, and an infrared radiation coating is formed on the surface of the combustion disc facing the burner case. Further, the burner case has an infrared absorbing film formed on at least the surface facing the combustion plate.

The combustion plate is made of ceramics containing at least one of aluminum oxide, silicon oxide, chromium oxide, iron oxide, magnesium oxide, calcium oxide, titanium oxide, zirconium oxide, silicon carbide and silicon nitride. It was configured.

The burner has a flame bore of 1.0 to 1.1.
In addition, the burner, a main body provided with a gas flow passage therein, and a burner gas opening / closing device provided in the gas flow passage, the burner being connected to the burner gas opening / closing device, and a gas In the flow path or in the burner gas switchgear,
A configuration in which a pressure regulator such as a gas governor is not provided, and also includes the burner and a firing chamber in which the burner is provided in an upper portion,
The burning surface of the burner was directed to the inside of the firing chamber.

Further, the burner comprises a burner, a firing chamber provided with the burner in the upper portion and having a grill inside, and a lower heating means provided in the lower portion of the firing chamber through the grill.

The operation of the above configuration will be described below. In this configuration, a large number of independent bubbles are provided inside the combustion plate provided with flame openings, the bubble ratio is 60 to 80% by volume, and the ratio of the thickness of the combustion plate to the flame opening is 8 to 10.
As a result, a combustion board with extremely high heat insulation can be obtained, and since the temperature difference between the front and back surfaces of the combustion board can be increased during combustion, flashback can be prevented, and at the same time, the heat capacity of the entire combustion board can be reduced, which reduces the amount of combustion. Even if it is done, the emission of CO can be suppressed, and as a result, the burner has a wide combustion amount variable range. On the other hand, when the bubble rate is less than 60%, the strength of the combustion plate increases, but the heat insulating property decreases and CO emission due to cooling of the combustion surface increases, and when the bubble rate exceeds 80%, The strength of the burner is extremely reduced. Therefore,
The optimum value of the bubble ratio that can achieve both heat insulation and strength is 65-
70%. Furthermore, when the flame aperture is 1.0 to 1.1,
The thickness of the combustion board can be reduced to 9 to 10 mm. The plate thickness of the conventional combustion disc is about 12 to 14 mm. At this time, if the diameter of the flame is less than 1.0, the ventilation resistance when the fuel gas passes through the flame is increased, and the lift phenomenon is likely to occur due to the increase in the flow velocity. Also, the flame caliber is 1.1
If it exceeds, the flashback is likely to occur due to the decrease in the flow rate of the fuel gas. Therefore, 1.05 is optimal as the flame aperture that can complete the most stable combustion.

Further, a large number of independent bubbles are provided inside the combustion plate provided with a flame port, the bubble ratio is 60 to 80% by volume, the plate thickness / flame aperture ratio of the combustion plate is 8 to 10, and combustion is performed. A band-shaped flame opening is provided on the outer periphery of the board, and the portion surrounded by the band-shaped flame opening is the first flame-free opening.The second flame-free opening is provided between a part of the band-shaped flame opening and the outer circumference of the combustion board. The caliber of the flame is 1.
In the case of 0 to 1.1, even if the thickness of the combustion plate is reduced to 9 to 10 mm, the flame opening can be eliminated from the center of the combustion plate where it is most likely to reach the highest temperature. It becomes a burner that is difficult to do, and a stable combustion state can be obtained even if the combustion amount is increased, and at the same time, the flame mouth part surrounded by the first flameless mouth part and the second flameless mouth part The radiation distribution on the heated surface can be made uniform.

Further, since a large number of independent bubbles are provided inside the combustion plate provided with the flame port and the inside of the bubbles is evacuated,
Since the heat insulation of the combustion board can be improved and the temperature difference between the front and back surfaces of the combustion board can be increased, flashback can be prevented even if the amount of combustion is increased, and at the same time the heat capacity of the entire combustion board is reduced, reducing the amount of combustion. However, CO emission can be suppressed, and as a result, a burner having a wide combustion amount variable range can be obtained.

Further, since a large number of independent bubbles are provided inside the combustion plate provided with flame ports, and an infrared absorbing film is formed on the surface of the burner case which houses the combustion plate, facing the combustion plate, combustion during combustion is achieved. Since heat is transferred from the backside of the panel to the infrared absorption film of the burner case, the temperature of the backside of the combustion panel is further lowered, and in addition to the high heat insulation of the combustion panel, it is more difficult to catch a flashback, and a stable combustion state is achieved even if the combustion amount is increased. Is obtained.

Further, independent bubbles are provided inside the combustion plate having a flame port, and an infrared radiation coating is formed on the surface of the combustion plate facing the burner case, and the surface of the burner case facing the combustion plate absorbs infrared rays. By forming a film, the heat transfer from the infrared radiation film on the back surface of the combustion plate to the infrared absorption film on the burner case is promoted during combustion, and the temperature on the back surface of the combustion plate is further lowered. In addition, the flashback becomes more difficult, and a stable combustion state can be obtained even if the combustion amount is increased.

The combustion plate is made of ceramics containing at least one of aluminum oxide, silicon oxide, chromium oxide, iron oxide, magnesium oxide, calcium oxide, titanium oxide, zirconium oxide, silicon carbide and silicon nitride. As a result, a burner excellent in heat resistance and corrosion resistance can be obtained.

Also, the flame diameter of the burner is 1.0 to 1.1.
By having a millimeter, a burner that can handle gas with a high burning rate can be obtained.

The burner is connected to the burner gas switchgear, and the gas governor is not provided in the gas flow passage or the burner gas switchgear, so that the supply gas pressure can be varied according to the wide burner amount variable range of the burner. Even if fluctuates from the minimum gas pressure to the maximum gas pressure, not only the generation of CO can be suppressed while ensuring a uniform radiation distribution, but also a significant cost reduction can be realized.

Further, since the combustion surface of the burner is directed to the inside of the baking oven, the distance between the combustion surface of the thin burner and the bottom of the baking oven can be increased, and a good cooking result can be obtained with a uniform heat distribution. A thick cooked food or the like can be installed in the baking chamber, and further, a wide range of burning amount of the burner can provide a cooker capable of handling various cooking menus.

Further, by providing a firing chamber having a grill inside, the burner provided above through the grill, and the lower heating means provided at the bottom, the combustion surface of the thin burner and the bottom of the firing chamber are provided. Since the distance can be increased, in order to make the heating distribution on the lower surface of the cooked product uniform, even if the distance between the grill and the lower heating means is increased, the distance from the grill to the burner can be maintained to some extent. Good cooking results can be obtained in a short time.

(Embodiment 1) Embodiment 1 of the burner of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, a burner 10 is a burner case 11 in which a ceramic combustion board 13 having a plurality of penetrating flame openings 12 is housed. The diameter of the burner opening 12 is 1.05 mm. The thickness of the ceramic combustion board 13 is 10 mm, a large number of fine closed cells 14 are formed inside the ceramic combustion board 13, and the bubble rate is 70%.

As described above, according to the present embodiment, the presence of the above-mentioned numerous fine closed cells 14 makes it possible to obtain a thin ceramic combustion disc 13 having a very high heat insulation property. Since the temperature difference can be increased, flashback can be prevented, and at the same time, the heat capacity of the entire ceramic burner 13 can be reduced. Therefore, CO emission can be suppressed even if the combustion amount is reduced, and as a result, a burner having a wide combustion amount variable range can be provided. realizable.

(Second Embodiment) A second embodiment of the burner of the present invention will be described below.

As shown in FIG. 2, the burner 20 is a burner case 21 in which a ceramic combustion board 23 having a plurality of penetrating flame openings 22 is housed. The diameter of the burner openings 22 is 1.05 mm. The thickness of the ceramic combustion board 23 is 10 mm, a large number of fine bubbles 24 are formed inside the ceramic combustion board 23, the bubble rate is 70%, and the flame port 22 is provided on the outer periphery of the ceramic combustion board 23. It is formed as the band-shaped flame opening 25, and the portion surrounded by the band-shaped flame opening 25 is the first flameless opening 26, and the second flame is formed between the part of the band-shaped flame opening 25 and the outer periphery of the ceramic burner 23. This is a configuration in which the flameless mouth portion 27 is provided.

As described above, according to the present embodiment, the presence of the above-mentioned numerous fine closed cells 24 makes it possible to obtain a thin ceramic combustion disc 23 having a very high heat insulating property, and the ceramic combustion disc 23 which is most likely to reach a high temperature. First flameless mouth 2 in the center
Since the burner 20 has a high heat insulating property of the ceramic burner 23 and is less likely to backfire, a stable combustion state can be obtained even if the combustion amount is increased, and at the same time, the band-shaped flame port 2
5, the strip-shaped flame opening 25 surrounded by the first flameless opening 26 and the second flameless opening 27 can uniformize the radiation distribution on the heated surface.

(Third Embodiment) A third embodiment of the burner of the present invention will be described below.

As shown in FIG. 3, the burner 30 is a burner case 31 in which a ceramic combustion board 33 having a plurality of penetrating flame openings 32 is housed. A large number of bubbles 34 are provided, and the inside of the closed bubbles 34 is evacuated. In this case, the method of creating a vacuum in the closed cells 34 is performed by molding a ceramic material in which combustible powder is kneaded into a combustion plate shape, and then burning the combustible powder in a high temperature air atmosphere, and the resulting fine particles are burned. By degassing such bubbles in a vacuum furnace at a higher temperature, the bubbles become independent bubbles that are not continuous with each other.

As described above, according to this embodiment, the presence of the vacuumed closed cells 34 can improve the heat insulating property of the ceramic combustion board 33 and increase the temperature difference between the front surface and the back surface of the ceramic combustion disk 33. Even if the combustion amount is increased, flashback can be prevented, and at the same time, the heat capacity of the entire ceramic combustion plate 33 is reduced, so that CO emission can be suppressed even if the combustion amount is reduced, and as a result, a wide combustion amount variable range is provided. You get a burner.

(Fourth Embodiment) A fourth embodiment of the burner of the present invention will be described below.

As shown in FIG. 4, the burner 40 is a burner case 41 in which a ceramic combustion plate 43 having a plurality of penetrating flame ports 42 is housed. The closed air bubbles 44 are provided, and the infrared absorbing film 45 is formed on the surface of the burner case 41 facing the ceramic combustion board 43.

As described above, according to this embodiment, heat is transferred from the back surface of the ceramic burner board 43 to the infrared absorbing film 45 of the burner case 41 during combustion, so that the back surface temperature of the ceramic burner board 41 is further lowered. In addition to the high heat insulating property of the ceramic combustion board 41, it becomes more difficult to cause a flashback, and a stable combustion state can be obtained even if the combustion amount is increased.

(Embodiment 5) Embodiment 5 of the burner of the present invention will be described below.

As shown in FIG. 5, the burner 50 is a burner case 51 in which a ceramic combustion board 53 having a plurality of penetrating flame openings 52 is housed. The independent air bubbles 54 are provided, and the infrared radiation coating 55 is formed on the surface of the ceramic burner 53 facing the burner case 51.
In this configuration, an infrared absorbing film 56 is formed on the surface facing the ceramic combustion plate 53.

As described above, according to this embodiment, the heat transfer from the infrared radiation coating 54 on the back surface of the ceramic burner 53 to the infrared absorption coating 56 of the burner case 51 at the time of combustion is promoted, resulting in ceramic burning. Since the back surface temperature of the board 53 is further lowered, the ceramic combustion board 53 has a high heat insulating property, and it is more difficult to cause a flashback, and a stable combustion state can be obtained even if the combustion amount is increased.

(Embodiment 6) Embodiment 6 of the combustion apparatus using the burner of the present invention will be described below.

As shown in FIG. 6, the combustion device 60 is provided with a gas flow passage 63 having a burner gas opening / closing device 62, and the burner 20 is connected to the burner gas opening / closing device 62 so that the gas passage 63 Or in the burner gas switchgear 62,
This is a configuration without a gas governor.

As described above, according to the present embodiment, even if the supply gas pressure fluctuates from the minimum gas pressure to the maximum gas pressure, for example, in the case of gas fuel, it is uniform due to the wide combustion variable range of the burner 20. It is possible not only to suppress the generation of CO while ensuring a stable radiation distribution, but also to realize a significant cost reduction.

(Embodiment 7) Embodiment 7 of the cooker using the burner of the present invention will be described below.

As shown in FIG. 7, the cooking device 70 has a structure in which the burner 20 is provided in the upper portion of a baking chamber 72 having a grill 71 near the bottom.

As described above, according to this embodiment, since the distance between the combustion surface of the thin burner 20 and the bottom of the baking chamber 72 can be increased, a good cooking result can be obtained with a uniform heat distribution, and the thick cooking can be performed. Objects and the like can be installed in the baking cabinet 72, and further, a wide burner amount variable range of the burner 20 can provide the cooker 70 that can support various cooking menus.

(Embodiment 8) An embodiment 8 of the cooker using the burner of the present invention will be described below.

As shown in FIG. 8, a cooker 80 is provided with a burner 82 having a grill 81 therein, and the burner 20 is provided above the burner 82 via the grill 81. The lower heating means 83 formed of a Bunsen burner is provided at the lower left and right of the baking chamber 82.

As described above, according to this embodiment, the distance between the combustion surface of the thin burner 20 and the bottom of the baking chamber 82 can be increased, so that the heating net on the lower surface of the cooked product can be made uniform. Even if the distance between 81 and the lower heating means 83 is increased, the distance from the grill 81 to the burner 20 can be maintained to some extent, and the cooker 80 that can obtain a good cooking result in a short time can be realized.

[0052]

As is apparent from the above description, according to the present invention, the following effects can be obtained.

(1) A large number of independent bubbles are provided inside a combustion plate provided with a flame port, the bubble ratio is 60 to 80% by volume, and the plate thickness / flame aperture ratio of the combustion plate is 8 to 10%. As a result, a combustion panel with extremely high heat insulation can be obtained, so that flashback can be prevented, and at the same time, the heat capacity of the entire combustion panel is reduced, so CO emissions can be suppressed even with a low combustion amount, resulting in a wide combustion amount variable range. When the flame caliber is 1.0 to 1.1, the thickness of the combustion plate is 9 to 10
Can be thinned to mm.

(2) A large number of independent bubbles are provided inside the combustion plate provided with flame openings, and the bubble ratio is 70 to 80% by volume.
The ratio of plate thickness / flame aperture of the combustion disc is 8 to 10 and a band-shaped flame port is provided on the outer periphery of the combustion disc, and the part surrounded by the band-shaped flame port is the first flameless port, and the band-shaped flame port is By providing the second flameless opening between a part of the and the outer periphery of the combustion plate, the thickness of the combustion plate can be reduced to 9 to 10 mm when the flame diameter is 1.0 to 1.1. However, it is difficult for flashback to occur, and at the same time, the flame opening surrounded by the first flameless opening and the second flameless opening can realize a uniform radiation distribution.

(3) Since a large number of independent bubbles are provided inside the combustion plate provided with flame ports and the inside of the bubbles is made to be a vacuum, the heat insulation of the combustion plate can be improved, and flashback can be prevented, and at the same time, a low combustion amount can be obtained. In this case, CO emission can be suppressed and a burner having a wide combustion amount variable range can be obtained.

(4) A large number of independent bubbles are provided inside the combustion plate provided with the flame port, and the infrared absorbing film is formed on the surface of the burner case that houses the combustion plate, facing the combustion plate. Since the backside temperature of the combustion plate of No. 1 decreases, it is possible to prevent flashback even when the amount of combustion is large.

(5) A large number of closed air bubbles are provided inside the combustion plate provided with flame openings, and an infrared radiation coating is formed on the surface of the combustion plate facing the burner case. By forming the infrared absorbing film on the surface facing the combustion plate, the temperature of the back surface of the combustion plate at the time of combustion is lowered, so that even when the combustion amount is large, it is possible to prevent flashback.

(5) The burner is connected to the burner gas switchgear, and the gas governor is not provided in the gas flow path or the burner gas switchgear so that the burner has a wide combustion amount variable range. Not only the generation of CO can be suppressed while securing the radiation distribution, but also a significant cost reduction can be realized.

(6) By directing the burning surface of the burner to the inside of the baking oven, the distance between the burning surface of the burner and the bottom of the baking oven can be increased, and good cooking results can be obtained with a uniform heat distribution. A thick cooked food or the like can be installed in the baking chamber, and further, a wide range of burning amount of the burner can provide a cooker capable of handling various cooking menus.

(7) By providing a firing chamber having a grill inside, the burner provided above through the grill, and the lower heating means provided at the bottom, the combustion surface of the burner and the bottom of the firing chamber are provided. Since the distance can be increased, in order to make the heating distribution on the lower surface of the cooked product uniform, even if the distance between the grill and the lower heating means is increased, the distance from the grill to the burner can be maintained to some extent. Good cooking results can be obtained in a short time.

[Brief description of drawings]

FIG. 1 is a partial sectional view of a burner according to a first embodiment of the present invention.

2A is a front view of a burner according to a second embodiment of the present invention, and FIG. 2B is a sectional view of FIG. 2A.

FIG. 3 is an enlarged sectional view of an essential part of a burner according to a third embodiment of the present invention.

FIG. 4 is an enlarged sectional view of a main part of a burner according to a fourth embodiment of the present invention.

FIG. 5 is an enlarged sectional view of an essential part of a burner according to a fifth embodiment of the present invention.

FIG. 6 is a conceptual diagram showing a burner and a gas passage according to a sixth embodiment of the present invention.

FIG. 7 is a sectional view showing the concept of the configuration of a cooking device according to a seventh embodiment of the present invention.

FIG. 8 is a sectional view showing the concept of the configuration of a cooking device according to an eighth embodiment of the present invention.

FIG. 9 is a partial sectional view of a conventional burner.

FIG. 10A is an external perspective view of a conventional burner, and FIG. 10B is an enlarged cross-sectional view of a main part of a combustion panel of the burner. FIG. 10C is a conceptual diagram of a configuration of a cooker using FIG.

FIG. 11 is a conceptual diagram showing a conventional burner and a gas flow path.

[Explanation of symbols]

 10, 20, 30, 40, 50 Burner 11, 21, 31, 41, 51 Burner Case 12, 22, 32, 42, 52 Flame Mouth 13, 23, 33, 43, 53 Combustion Disc 14, 24, 34, 44 , 54 closed air bubbles 25 zonal flame mouth portion 26 first flameless mouth portion 27 second flameless mouth portion 45, 56 infrared absorption coating 55 infrared radiation coating 60 combustion device 61 burner gas switchgear 62 gas passage 70, 80 cooker 71, 81 grill 72, 82 baking chamber 83 lower heating means

Claims (10)

[Claims] 1. A combustion plate having a flame outlet and a burner case for accommodating the combustion plate, wherein a large number of independent bubbles are provided inside the combustion plate and the bubble ratio is 60 to 80% by volume. Burner having a plate thickness / flame caliber ratio of 8 to 10. 2. A plate of a combustion plate, comprising a combustion plate having a flame port and a burner case for housing the combustion plate, wherein a large number of independent bubbles are provided inside the combustion plate and the bubble ratio is 60 to 80% by volume. The thickness / flame diameter ratio is set to 8 to 10 and a band-shaped flame opening is provided on the outer periphery of the combustion plate, and a portion surrounded by the band-shaped flame opening is defined as a first flameless opening, and a part of the band-shaped flame opening is formed. A burner that has a second flameless opening between it and the outer circumference of the combustion board. 3. A burner comprising a combustion disc having a flame port and a burner case for housing the combustion disc, wherein a large number of independent bubbles are provided inside the combustion disc and the inside of the bubbles is a vacuum. 4. A combustion plate having a flame outlet and a burner case for housing the combustion plate, wherein a large number of independent bubbles are provided inside the combustion plate, and infrared radiation is absorbed on the surface of the burner case facing the combustion plate. Burner with a film. 5. An infrared radiation coating comprising a combustion plate having a flame outlet and a burner case accommodating the combustion plate, wherein a large number of independent bubbles are provided inside the combustion plate, and the surface of the combustion plate facing the burner case. Burner in which an infrared absorption film is formed on the surface of the burner case facing the combustion plate. 6. A combustion board comprising aluminum oxide, silicon oxide,
6. A ceramic containing at least one of chromium oxide, iron oxide, magnesium oxide, calcium oxide, titanium oxide, zirconium oxide, silicon carbide, and silicon nitride as a component. Burner. 7. The burner according to claim 1, wherein the flame diameter is 1.0 to 1.1 mm. 8. A burner according to any one of claims 1 to 5, a main body having a gas flow passage therein, and a burner gas switchgear provided in the gas flow passage, A combustion apparatus in which the burner is connected to a burner gas switch, and a gas governor is not provided in the gas flow path or the burner gas switch. 9. A cooker comprising the burner according to any one of claims 1 to 5 and a baking cabinet provided with the burner at an upper part thereof, and a combustion surface of the burner facing the inside of the baking cabinet. . 10. The burner according to any one of claims 1 to 5, a burner provided with the burner in an upper part and having a grill inside, and provided in a lower part of the burner via the grill. Cooker consisting of a lower heating means.