JP4720389B2 - Burner - Google Patents

Description

  The present invention relates to a stove burner used for a cooker that uses gas or petroleum as fuel.

There exists a conventional stove burner as shown in Patent Document 1. As shown in FIGS. 9, 10, and 11, the burner body 63 having an annular head portion 62 having an opening 61 on the upper surface and a flame detachably fitted to the annular head portion 62. A mouth plate 64 is provided, and the flame mouth plate 64 is provided with convex portions 65 radially and equally spaced toward the center, and the flame ports 66 are disposed radially and equally spaced on the convex portion 65. In the longitudinal section of the mouth 66, one end 67 of the flame mouth 66 protrudes above the other end 68 of the flame mouth 66 to form an upper end surface 69 and a lower end surface 70 of the flame mouth 66, and A stove having a small variation in the dimensions of the flame port 66 and good workability, in which the end surface 69 and the lower end surface 70 are press-molded so as to form flat portions 71 and 72, respectively, and the flame 73 is ejected obliquely upward. By becoming a burner and the flame 73 from the flame outlet 66 being obliquely upward A swirling flame is generated by the force that the flame 73 blows in the circumferential direction and the exhaust heat rises to an upward flow, and the combustion air is sucked from the annular central portion and the outer peripheral portion of the flame port plate 64 in a good combustion state. As a result, since the distance between the pan bottom and the stove burner can be made closer, the thermal efficiency can be improved.
JP 2000-8896 A

  However, in the above-described conventional configuration, in the cross section perpendicular to the longitudinal direction of the flame port 66, the convex portion 65 of the flame port plate 64 in the WXYZ expanded cross section of the flame port plate 64 of FIG. 10. Since an inclined surface 74 is formed between the rectangular surface on one side and the upper end surface 69 of the flame port 66, the flame 73 a is ejected from the flame port 66 a immediately before the flame port 66 with respect to the ejection direction of the flame 73. The inclined surface 74 is inevitably heated, so that the inclined surface 74 may be overheated and excessive thermal expansion may occur, and the flame port 66 is formed only by the flat portion of the upper end surface 69 of the flame port 66. In some cases, it was not possible to suppress the change in the opening size of. As a result, the opening size of the flame mouth 6 is often increased, the amount of suction air is increased, the temperature of the flame 73 and the flame mouth 66 itself are increased, and the ejection angle of the flame 73 is changed. As a result, the stability of combustion may be reduced.

  The present invention solves the above-described conventional problems, prevents deformation due to external force, reduces contact with the flame outlet of the adjacent flame to prevent overheating of the flame mouth, and opens the flame mouth due to thermal expansion. An object is to secure a flame opening configuration capable of minimizing dimensional changes, thereby maintaining good combustion and realizing high thermal efficiency.

  In order to solve this problem, the stove burner of the present invention has a burner body having an annular head portion provided with an opening on the upper surface, and the annular head upper surface of the burner body and the outer peripheral surface of the annular head portion are detachable from above. The flame mouth plate is provided with a sheathed fitting, and the flame mouth plate has a first convex portion provided radially from the center to the outer peripheral side and a second convex portion provided above the second convex portion. Are provided at regular intervals to form a first flat surface portion and a second flat surface portion on the upper surface of the first convex portion and the upper surface of the second convex portion, respectively. A slit-like flame opening that opens radially in a constant circumferential direction from the center of the flame mouth plate toward the outer peripheral side is provided in one rectangular part of the parts.

In this way, not only are the two-stage convex portions radially provided from the center toward the outer peripheral side of the flame port plate, but also the first flat portions on the upper surface of the first convex portion and the upper surface of the second convex portion, respectively. And the second flat surface portion, the rectangular portion of the first convex portion, the first flat surface portion, the rectangular portion of the second convex portion, and the second flat surface portion are sequentially configured and structurally deformed. Since the slit-shaped flame opening is provided in one rectangular portion of each second convex portion based on this structure, the portion heated by the flame ejected from the immediately preceding slit-shaped flame opening is mainly the second Of the projecting portion of the convex portion of the projecting portion which is not provided with the slit-shaped flame mouth and transitions from the rectangular portion to the second plane portion, and as a result, the area where the slit-shaped flame mouth is heated from behind by the adjacent flame is minimized. can do. Therefore, the change in the opening size of the slit-shaped flame opening is inevitably minimized, and the good suction combustion amount and the flame ejection angle can be made constant to maintain good combustion. In particular, since the generation of unburned gas due to the contact between the flame mouth plate and the flame can be minimized, the distance between the flame mouth plate and a heated object such as a pan can be approached, and high thermal efficiency can be realized.

  The stove burner of the present invention is not only provided with a two-stage convex portion radially from the center toward the outer peripheral side of the flame port plate, but also on the upper surface of the first convex portion and the upper surface of the second convex portion, respectively. By forming the flat surface portion and the second flat surface portion, the structure is difficult to structurally deform, and based on this, a slit-shaped flame mouth is provided in one rectangular portion of each second convex portion The area where the slit-shaped flame opening is heated from behind by the adjacent flame can be minimized. Therefore, it is possible to suppress the thermal expansion of the flame mouth plate due to the contact between the flame mouth plate and the flame and minimize the generation of unburned gas, so that the distance between the flame mouth plate and the heated object such as a pan can be approached and high thermal efficiency can be achieved. Can be realized.

  A first aspect of the present invention is a burner body having an annular head having an opening on its upper surface, and a flame mouth plate in which the upper surface of the annular head of the burner body and the outer peripheral surface of the annular head are detachably covered and fitted from above. The flame mouth plate is provided with a two-stage convex portion configured with a first convex portion provided radially from the center toward the outer peripheral side and a second convex portion provided above the first convex portion at regular intervals. Forming a first flat surface portion and a second flat surface portion on the upper surface of the first convex portion and the upper surface of the second convex portion, respectively, and in one of the rectangular portions in the longitudinal direction of the second convex portion By providing a slit-like flame opening that radially opens from the center of the flame mouth plate toward the outer circumference side in a certain circumferential direction, the rectangular surface of the first convex part, the first flat part, the second convex part The rectangular plane of the part and the second plane part are configured in sequence, making it difficult to structurally deform. Based on this configuration, one rectangular part of each second convex part Because the lit-like flame outlet is provided, the portion heated by the flame ejected from the immediately preceding slit-like flame opening is near the intersection of the rectangular plane where the slit-like flame outlet of the second convex part is not provided and the second plane portion As a result, the area in which the slit-shaped flame opening is heated from behind by the adjacent flame can be minimized. Therefore, the change in the opening size of the slit-shaped flame opening is inevitably minimized, and the good suction combustion amount and the flame ejection angle can be made constant to maintain good combustion. In particular, since the generation of unburned gas due to the contact between the flame mouth plate and the flame can be minimized, the distance between the flame mouth plate and a heated object such as a pan can be approached, and high thermal efficiency can be realized.

  According to a second aspect of the present invention, the slit-shaped flame mouth is formed by rupturing at the same time as molding the second convex part of the two-stage convex part of the flame-mouthed plate, and an upper and lower opening cross section perpendicular to the longitudinal direction of the slit-shaped flame mouth In the above, the upper end and the lower end of the slit-shaped flame mouth are respectively matched with the second plane part and the first plane part, thereby reducing the number of processing steps and keeping the slit-shaped flame opening size constant. Can be configured.

  According to a third aspect of the present invention, the flame mouth plate is formed by forming a cylindrical portion so as to cover and fit the outer peripheral surface of the annular head of the burner body, and bending the lower end portion of the cylindrical portion upward from the outer peripheral direction. By forming the cylindrical portion, deformation due to external force of the cylindrical portion and deformation due to thermal expansion due to combustion heat are suppressed, and the fitting of the annular head portion of the burner body and the cylindrical portion of the flame port plate is prevented. The state can be kept good and leakage of fuel gas and the like can be prevented.

  According to the fourth aspect of the present invention, the infrared radiation film is formed on the surface of the flame mouth plate, so that the heat is constantly radiated from the surface of the flame mouth plate during combustion, and the temperature of the flame mouth plate surface can be prevented from becoming high.

  In the fifth aspect of the invention, the infrared radiation coating is composed of a heat-resistant hard radiation coating containing titanium, so that heat is constantly radiated from the surface of the flame front plate during combustion to prevent the surface of the flame front plate from becoming hot. In addition, it is possible to obtain a highly durable infrared radiation film that can withstand frictional cleaning by the user due to corrosion resistance and high hardness due to the titanium content, and as a result, a burner that is easy to maintain can be realized.

  The sixth aspect of the present invention is that the flame mouth plate is made of a material having excellent heat resistance and corrosion resistance and workability such as stainless steel, and the infrared radiation film on the surface of the flame mouth plate is a flame mouth plate after the slit-like flame mouth is formed. Is heated for a certain period of time at a temperature of 700 to 850 ° C. in a low oxygen concentration atmosphere having an oxygen concentration of 17 to 19%, so that not only Fe 2 O 3 produced by heating in air but also emissivity of Since a relatively large amount of high-hardness Fe3O4 is formed, an infrared radiation coating film having a high hardness and a high emissivity can be formed at a low cost without requiring a separate coating process.

  According to a seventh aspect of the present invention, the flame mouth plate is made of an aluminum-plated steel plate, and the infrared radiation coating on the surface of the flame mouth plate is heated in the air at a temperature of 800 to 850 ° C. for a certain period of time. The plated layer is oxidized to cover the entire surface of the base steel plate as an aluminum oxide film, so the hardness of the aluminum oxide film as a ceramic ensures the corrosion resistance and friction cleaning properties of the flameneck plate, and at the same time high infrared radiation Since the performance can be obtained, it is possible to prevent the flame mouth plate from becoming hot.

  In the eighth aspect of the invention, the thickness of the aluminum plating layer of the aluminum plated steel sheet of the flame mouth plate is in the range of 30 to 100 μm, so that the oxidation reaction proceeds from the surface of the aluminum plating layer exposed to the outside to the inside, An aluminum oxide film is formed as an infrared radiation film, but the aluminum plating layer in contact with the steel plate surface of the base material is not oxidized and forms an alloy layer of iron and aluminum. An intermediate layer can be formed between them to reliably cover the surface of the steel sheet, and as a result, the corrosion resistance of the flame port plate can be improved.

(Embodiment 1)
1 is a longitudinal sectional view of a stove burner in Embodiment 1 of the present invention, FIG. 2 is a top view of a flame mouth plate in the same embodiment, and FIG. 3 is A- of the flame mouth plate in the same embodiment. FIG. 4 is an expanded cross-sectional view of a flame front plate in the same embodiment. FIG.

1, 2, 3, and 4, reference numeral 1 is made of a metal having excellent heat resistance, corrosion resistance, and workability, such as stainless steel, and the premixed gas flows through an annular head 3 having an opening 2 on the upper surface. A flame burner plate 5 is fitted to the annular head 3 of the burner main body 1 so as to cover the upper surface, the outer peripheral surface, and the inner peripheral surface. Similarly, the flame port plate 5 is made of a metal having excellent heat resistance and corrosion resistance and workability, such as stainless steel, and a first convex portion 6 provided radially from the annular center toward the outer peripheral side, and the first convex portion 6. Are provided at regular intervals in the circumferential direction, and the upper surface of the first convex portion 6 and the upper surface of the second convex portion 7 are respectively provided on the upper surface of the second convex portion 7. A first plane portion 9 and a second plane portion 10 are configured. Further, out of the rectangular portions 11 and 12 in the longitudinal direction of the second convex portion 7, the rectangular portion 11 has a radial direction from the annular center of the flame opening plate 5 toward the outer peripheral side and a constant circumferential direction (flaming opening). A slit-like flame opening 13 is provided that opens in a counterclockwise direction when viewed from the top surface of the plate 5. The slit-shaped flame mouth 13 is formed by molding the second convex portion 7 of the two-stage convex portion 8 of the flame-mouth plate 5 and simultaneously breaking the upper and lower molds. In the upper and lower opening cross sections perpendicular to the longitudinal direction, the upper end portion 14 and the lower end portion 15 of the slit-shaped flame opening 13 are made to coincide with the second plane portion 10 and the first plane portion 9, respectively. On the other hand, the outer peripheral part of the flame mouth plate 5 constitutes a cylindrical part 16 that covers and fits the outer peripheral surface of the annular head 3 of the burner body 1, and the lower end part of the cylindrical part 16 extends upward from the outer peripheral direction over the entire circumference. It is a flange-like bent portion 17 that is bent into a bent shape. In addition, the lower end part of the inner peripheral part of the flame-mouth plate 5 also has the curling structure bent upward from the inner peripheral direction over the entire periphery. Further, an infrared radiation film 18 made of a heat-resistant hard radiation paint containing titanium is baked on the flame mouth plate 5 on the surface of the flame mouth plate, particularly the upper surface where the slit-like flame mouth 13 is opened.

  The operation and action of the stove burner configured as described above will be described below.

When premixed gas flows in from the mixing tube 2 of the burner body 1 and is ignited by any method in the vicinity of the slit-shaped flame port 13 of the flame-mouth plate 5, a flame 19a is formed by one slit-shaped flame port 13a. Then, the flame is instantaneously transferred from the adjacent slit-shaped flame port 13 to the slit-shaped flame port 13b, and a combustion state is formed on the entire upper surface of the flame port plate 5. At this time, since the slit-shaped flame mouth 13 is configured in a counterclockwise circumferential direction when viewed from the upper surface of the flame mouth plate 5, the flame 19 is ejected obliquely upward by an ascending airflow due to combustion, and at the same time, the flame mouth plate As a result of jetting in a counterclockwise circumferential direction as seen from the top surface of 5, a swirl state is formed on the flame mouth plate 5. Further, since the slit-shaped flame mouth 13 is formed by breaking the upper and lower molds at the same time that the second convex portion 7 is molded, the slit-shaped flame mouth 13 has a slit-shaped flame mouth in a cross section perpendicular to the longitudinal direction of the slit-shaped flame mouth 13. The gap L1 is inevitably formed between the upper end portion 14 and the lower end portion 15 of the thirteen. Therefore, the actual slit opening dimension of the slit-shaped flame opening 13 is the gap L2. At this time, the optimum value of the gap L2 varies depending on the type of fuel gas, but approximately 0.5 to 0.8 mm is appropriate. In the case of natural gas or liquefied petroleum gas, it is possible to ensure the suction performance of combustion air or yellow flame. The gap L2 is optimally in the range of 0.55 to 0.65 mm in order to suppress the generation of the gas. In the case of a fuel gas containing a large amount of hydrogen and having a high combustion rate, the gap L2 is 0 to suppress the flashback phenomenon. A range of .45 to 0.55 mm is optimal. Further, the gap L1 is closely related to the ejection angle θ of the flame 19, and when the gap L1 is close to 0 mm, the ejection angle θ of the flame 19 becomes small and the contact with the adjacent flame 19a and flame 19b increases. As a result, the diffusion of combustion air from the outside air may be insufficient, or the contact area between the surface of the flame mouth plate 5 and the flame 19 may be enlarged, and the flame mouth plate 5 may be overheated. On the other hand, when the gap L1 is larger than necessary, the ejection angle θ of the flame 19 is increased, and the flame 19 comes into contact with the bottom of the pan before the combustion of the flame 19 is completed, thereby increasing the amount of unburned gas discharged. There is a case. Therefore, in order to appropriately maintain the ejection angle θ of the flame 19 and ensure a good combustion state, it is necessary to appropriately manage the range of the gap L1. The appropriate range of the gap L1 is 0.1 to 0.4 mm, but in the present invention, the optimum value of the gap L1 is set to a range of 0.2 to 0.3 mm, and the ejection angle of the flame 19 at this time θ is in the range of 30 to 45 ° and maintains a good combustion state. The flame port plate 5 includes a first flat surface portion 9 of the two-stage convex portion 8, a rectangular portion 12 not provided with the slit-shaped flame port 13, and a second flat surface portion 10 configured in a continuous and stepped manner. Therefore, the portion heated by the flame 19a ejected from the immediately preceding slit flame opening 13a is mainly from the rectangular portion 12 where the slit-like flame opening 13 of the second convex portion is not provided to the second plane portion 10. As a result, the area heated from the back by the contact area between the flame 19a and the flame mouth plate 5 can be minimized. Further, in the combustion state, thermal expansion is inevitably generated in the flame mouth plate 5, but the first flat surface portion 9 of the two-stage convex portion 8, the rectangular portion 12 not provided with the slit-like flame mouth 13, and the second In order to suppress deformation due to thermal expansion structurally, the flat surface portion 10 of the gas pipe is suppressed to a level that does not affect the combustion state in order to suppress deformation due to thermal expansion. Can do. Moreover, the outer peripheral part of the flame mouth plate 5 is a cylindrical part 16 that covers and fits the outer peripheral surface of the annular head 3 of the burner body 1, and the lower end part of the cylindrical part 16 has a flange-like shape over the entire circumference. Since it comprises the bending part 17, it suppresses that the cylindrical part 16 expands outside by thermal expansion, and the fitting state of the annular head 3 and the cylindrical part 16 of the burner main body 1 is favorable. It is possible to prevent leakage of fuel gas and the like. Furthermore, since the infrared radiation film 18 by the heat-resistant hard radiation coating containing titanium is baked on the surface of the flame mouth plate 5 where the slit-like flame mouth 13 is open, the surface of the flame mouth plate 5 The surface temperature can be lowered by preventing heat storage at the bottom, and as a result, the thermal expansion of the flame mouth plate 5 can be suppressed and the change in the opening size of the slit-like flame mouth 13 can be minimized. Further, titanium contained in the component of the infrared radiation film 18 has an effect of increasing the hardness of the infrared radiation film 18 itself to a pencil hardness of about 8-9H and heat resistance. Even if it becomes dirty due to the adhesion of the broth, etc., durability against friction cleaning can be obtained, and a stove burner with excellent care can be realized.

  As described above, the slit-shaped flame that opens in a constant circumferential direction radially from the center toward the outer peripheral side of the flame mouth plate 5 that is hardly structurally deformed even in a combustion state and that promotes heat dissipation from the surface. By providing the mouth 13, the suction air amount and the ejection angle θ of the flame 19 can be made constant and a good combustion state can be maintained, so that the distance between the flame mouth plate 5 and the object to be heated such as a pan is brought closer. It is possible to realize a stove burner with high thermal efficiency and excellent care.

(Embodiment 2)
FIG. 5 is a longitudinal cross-sectional view of a stove burner in Embodiment 2 of the present invention.

  In the figure, the difference from the first embodiment is that the lower end portion of the cylindrical portion 31 of the outer peripheral portion of the flame port plate 30 is rolled up from the outer peripheral direction over the entire periphery, and is configured by a bent portion 32 having a curling cross section. By the way.

Note that components having the same reference numerals as those in Embodiment 1 have the same structure, and description thereof is omitted.
The operation and action of the combustor configured as described above will be described below.

  As in the first embodiment, the lower end portion of the cylindrical portion 31 of the outer peripheral portion of the flame port plate 30 is rolled up from the outer peripheral direction over the entire periphery, and the cross section is constituted by the curling-shaped bent portion 32. Suppressing the cylindrical portion 31 from expanding outward due to thermal expansion due to combustion at the flame port plate 30, keeping the fitting state between the annular head 3 of the burner body 1 and the cylindrical portion 31 well, It is possible to prevent leakage of fuel gas and the like, and at the same time, prevent the spilled portion from entering the bent portion 32. Therefore, a stove burner satisfying both the prevention of fuel gas leakage and the careability can be obtained.

(Embodiment 3)
FIG. 6 is a partially enlarged cross-sectional view of the flamelet plate 40 of the stove burner in Embodiment 3 of the present invention.

  In the figure, the difference from the first embodiment is that the flame mouth plate 40 is made of a material excellent in heat resistance and corrosion resistance and workability such as a stainless steel plate, and the flame mouth plate 40 after the slit-like flame mouth 13 is formed. The infrared radiation film 41 is formed on the surface of the flame-plate 40 by heating for a certain time at a temperature of 700 to 850 ° C. in a low oxygen concentration atmosphere having an oxygen concentration of 17 to 19%.

Note that components having the same reference numerals as those in Embodiment 1 have the same structure, and description thereof is omitted.
The operation and action of the combustor configured as described above will be described below.

  The infrared radiation film 41 formed by such a method contains not only Fe2O3 produced by heating in air having an oxygen concentration of about 21% but also a large amount of Fe3O4. Since this Fe3O4 is black and has high emissivity and high hardness, it does not require a separate paint coating process, has excellent infrared radiation characteristics, and constitutes an infrared radiation coating 41 having high cost and high durability. Can do. Therefore, it is possible to prevent the flamelet plate 40 from being heated to a high temperature due to combustion, to suppress a change in the opening size of the slit-like flamelet 13 and to obtain a stove burner that can maintain a good combustion state.

(Embodiment 4)
FIG. 7 is a partially enlarged cross-sectional view of the flame mouth plate 50 before heating of the stove burner according to Embodiment 4 of the present invention, and FIG. 8 is a partially enlarged cross-sectional view of the infrared radiation film 51 of the flame mouth plate 50 after heating. is there.

In the figure, the difference from the first embodiment is that the flame plate 50 has a thickness of the aluminum plating layer 52 3.
After forming the slit-shaped flame mouth 13 with the aluminized steel plate 53 formed in the range of 0 to 100 μm, the flame mouth plate 50 is heated in the air at a temperature of 800 to 850 ° C. for a certain period of time to form the infrared radiation coating 51. Has just been configured.

Note that components having the same reference numerals as those in Embodiment 1 have the same structure, and description thereof is omitted.
The operation and action of the combustor configured as described above will be described below.

  In general, the thickness of the aluminum plating layer 52 is less than 30 μm, but in the present embodiment, the thickness of the aluminum plating layer 52 is formed in the range of 30 to 100 μm. Not all are oxidized, but a portion at a certain depth from the surface is oxidized to form an infrared radiation coating 51 made of porous aluminum oxide and having excellent infrared radiation characteristics. On the other hand, the aluminum plating layer 52 in contact with the base steel plate 54 is not oxidized and forms an intermediate layer 55 made of an alloy layer of iron and aluminum because there is no contact with outside air. Therefore, the surface of most of the steel plates 54 excluding the opening end face of the slit-shaped flame mouth 13 can be reliably shielded from the outside air. Note that the thickness of the aluminum plating layer 52 is optimally 40 to 60 μm from the viewpoint of ensuring the surface hardness of the flamelet plate 50 and the thickness of the intermediate layer 55.

  As described above, since the infrared radiation film 51 having excellent infrared radiation characteristics, low cost, and high durability can be formed without requiring a separate paint coating process, the flame front plate 50 by combustion is used. Thus, a high-durability stove burner can be obtained that can prevent a change in the opening size of the slit-shaped flame opening 13 and maintain a good combustion state.

  As described above, the stove burner according to the present invention can be widely applied not only to cooking appliances used for home kitchens and commercial kitchens but also to cooking appliances for leisure such as camping goods.

The longitudinal cross-sectional view of the stove burner in Embodiment 1 of this invention Top view of the flame mouth plate in the same embodiment The expanded sectional view of the cross section of the flame mouth plate of the same embodiment, and the conceptual diagram of a flame form The expanded sectional view of the flame mouth board in the embodiment The longitudinal cross-sectional view of the stove burner in Embodiment 2 of this invention The partial expanded sectional view of the flame-mouth plate 40 of the stove burner in Embodiment 3 of this invention The partial expanded sectional view of the flame-mouth board before the heating of the stove burner in Embodiment 4 of this invention Partial enlarged cross-sectional view of the infrared radiation film of the flame mouth plate after heating in the same embodiment Longitudinal section of a conventional stove burner Top view of the flame plate of the same conventional burner A developed cross-sectional view of the cross-section of the conventional stove burner A-B-C-D cross section and a conceptual diagram of a flame form

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Burner main body 2 Opening part 3 Annular head 5, 30, 40, 50 Flame port plate 6 First convex part 7 Second convex part 8 Two-stage convex part 9 First flat part 10 Second flat part DESCRIPTION OF SYMBOLS 11, 12 Rectangular part 13, 13a, 13b Slit-like flame opening 14 Upper end part of slit-like flame mouth 15 Lower-end part of slit-like flame hole 16, 31 Cylindrical part 17, 32 Bending part 18, 41, 51 Infrared radiation film 52 Aluminum plated layer 53 Aluminum plated steel sheet

Claims (8)

A burner body having an annular head with an opening on the upper surface, and a flame mouth plate in which the upper surface of the annular head of the burner body and the inner and outer peripheral surfaces of the annular head are detachably covered and fitted from above. The flame mouth plate is provided with a two-stage convex portion, which comprises a first convex portion provided radially from the center toward the outer peripheral side and a second convex portion provided above the first convex portion, at a constant interval. A first flat surface portion and a second flat surface portion are formed on the upper surface of the convex portion and the upper surface of the second convex portion, respectively, and one of the rectangular portions in the longitudinal direction of the second convex portion has a flame. A stove burner provided with a slit-shaped flame opening that radially opens from the center of the mouth plate toward the outer peripheral side in a constant circumferential direction. The slit-shaped flame mouth is formed by rupturing at the same time as molding the second convex part of the two-stage convex part of the flame-shaped plate, and in the upper and lower opening cross section perpendicular to the longitudinal direction of the slit-shaped flame mouth, 2. The stove burner according to claim 1, wherein the upper end portion and the lower end portion of the first and second lower ends are made to coincide with the second plane portion and the first plane portion, respectively. The flame port plate is formed of a bent portion configured to cover and fit the outer peripheral surface of the annular head portion of the burner body, and the lower end portion of the cylindrical portion is bent upward from the outer peripheral direction. The stove burner of any one of 1-2. The stove burner according to any one of claims 1 to 3, wherein an infrared radiation film is formed on the surface of the flame front plate. 5. The stove burner according to claim 4, wherein the infrared radiation coating is composed of a heat-resistant hard radiation coating containing titanium. The flame mouth plate is made of a material having excellent heat resistance, corrosion resistance, and workability, such as a stainless steel plate, and the infrared radiation film on the surface of the flame mouth plate is the oxygen concentration of the flame mouth plate after the slit-like flame mouth is formed. The stove burner according to claim 4, wherein the burner is configured by heating at a temperature of 700 to 850 ° C for a predetermined time in an atmosphere having a low oxygen concentration of 17 to 19%. The burner plate according to claim 4, wherein the flame mouth plate is made of an aluminum-plated steel plate, and the infrared radiation film on the surface of the flame mouth plate is heated in air at a temperature of 800 to 850 ° C. for a predetermined time. The stove plate is a stove burner according to claim 7, wherein the thickness of the aluminum plating layer of the aluminum plated steel sheet is in the range of 30 to 100 µm.