JP2000304267A - Burner and oven employing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an oven, securing a high thermal efficiency and a wide variable range of combustion amount and realizing a highly durable type burner having workability while realizing excellent cooking performance. SOLUTION: A slit flame port group 21, bored on the slanted surfaces 20 of a burner cap 17 having a substantially regular hexagonal piramid shape, is equipped with upper burner ports 24 and lower burner ports 25, divided into up-and-down stages through a no-burner-port part 23. According to this method, the interference of flames in the direction of a plane and the up-and-down direction is restricted by a ridgeline 19 and the no-burner-port part 23 whereby the length of the flames can be shortened and, further, the change of slit width of burner ports due to the use for a long period of time is restrained whereby the durability of the burner can be improved.

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 fuel and a stove using the burner as a heating source.

[0002]

2. Description of the Related Art Conventionally, a burner of this kind is disclosed in
There was one described in US Pat. No. 9119.
As shown in FIGS. 8 (a) and 8 (b), this burner has a large number of inwardly directed flame ports 1 arranged in a row in the circumferential direction of the inner peripheral surface, and within ± 30% of the theoretical combustion air amount. An annular burner 2 that is burned with air, the bottom of which is closed by a shield plate 3.
Thus, the supply of secondary air was suppressed and the fuel was burned to ensure high thermal efficiency.

[0003]

However, when a conventional burner is applied to a stove or the like, since the flame is formed concentrated on the inside, the combustion depends on the primary air, and the secondary air is inevitable. The flame length tends to be longer. Further, in the conventional burner, in order to form the flame port 1, a cutting method by machining must be used, and as a result, the cost tends to be high.

The present invention provides a highly durable burner having a short flame length and good workability, and using the burner as a stove burner to reduce the distance to a heated object such as a pot. It is an object to secure good cooking performance while ensuring high thermal efficiency.

[0005]

According to the present invention, there is provided a burner having a premixed gas mixing chamber formed on a burner main body having an inclined surface having a side surface inclined from an upper part to a lower part. A pyramid-shaped pyramid-shaped burner cap is placed, a boiled shield is placed on top of the burner cap, and a slit flame port group is provided on the inclined surface of the side of the burner cap, which is radially drilled in the vertical direction. The group consisted of an upper flame port and a lower flame port divided vertically through a non-flame port.

According to the above invention, since the slit flame ports are provided on the inclined surface corresponding to the rectangular surface of the truncated polygonal pyramid, the flame formed by each inclined surface is bordered by the ridge of the truncated polygonal pyramid. It is clearly divided, and the extension of the flame length due to interference between the flames can be prevented. In addition, since the flame port is divided into an upper flame port and a lower flame port which are divided into upper and lower parts through a non-flame port on the slope of the burner cap, the entire flame can be generated almost directly upward to promote heat concentration. However, since the non-flame port suppresses interference between the upper and lower flames formed by the upper and lower flame ports, the length of each flame at the upper and lower portions can be shortened.

[0007]

The invention according to claim 1 comprises a flame port provided on an inclined surface of a side surface of a burner cap having a substantially polygonal truncated pyramid shape, and the flame port is formed in a vertical direction of the inclined surface. And a group of slit flame openings that are radially perforated. For this reason, not only can the entire flame be generated almost directly upward to promote the concentration of heat, but also the flame can be shortened as a whole by suppressing flame interference in the plane direction and the vertical direction. In addition, regarding the processing of the flame port, since the inclined surface is a flat surface, it is possible to reduce the oblique impact on the tooth mold of the mold for forming the slit flame port group, and it is possible to simultaneously drill a plurality of slits. The life of the mold can be extended.

According to a second aspect of the present invention, the flame port provided on the side surface of the burner cap having a substantially polygonal prism shape is a group of slit flame ports formed in a vertical direction. For this reason, not only the workability of the slit can be ensured, but also because the slit flame port group does not have an upper opening, it is possible to suppress entry of a falling object such as boiling.

According to a third aspect of the present invention, the upper flame port and the lower flame port are vertically divided via a non-flame port. For this reason, since the non-flame port suppresses the interference between the flames formed by the upper flame port and the lower flame port, the overall flame length can be shortened. Further, by dividing the upper burner port and the lower burner port, a change in the burner slit width due to long-time use can be suppressed, and the burner cap can be prevented from being deformed, so that the durability of the burner as a whole can be secured.

According to a fourth aspect of the present invention, the lower part of the extension of the upper flame port and the upper part of the extension of the lower flame port are non-flame ports. By this non-flame port, a secondary air passage is formed between the adjacent upper and lower flame ports, and the flame can be further shortened.

According to a fifth aspect of the present invention, the lower part of the upper flame port and the upper part of the lower flame port are non-flame ports, and the lower end of the upper flame port and the upper end of the lower flame port are provided side by side. It was done. The juxtaposition of the lower end of the upper flame port and the upper end of the lower flame port makes it possible to improve the fire transfer between the adjacent upper flame port and lower flame port.

According to a sixth aspect of the present invention, the slit cross section in the longitudinal direction of the slit flame port group has a reduced slit width from the downstream side to the upstream side of the premixed gas. This downstream portion becomes a flame holding space, and stable combustion can be ensured up to a low combustion amount.

According to a seventh aspect of the present invention, the slit cross section in the longitudinal direction of the slit flame port group is reduced in slit width from the downstream side to the upstream side of the premixed gas, and the rectifying section is provided with a depth on the upstream side. It is provided. Due to the flame holding properties of the downstream portion, not only stable combustion can be ensured up to a low combustion amount, but also flashback can be suppressed even when the cross-sectional plate thickness is small due to the rectifying portion.

In the invention according to claim 8, the slit cross section in the longitudinal direction of the group of slit flames is reduced stepwise in a stepwise manner from the downstream side to the upstream side of the premixed gas, and the upstream side has a depth. The rectifier is provided. This stepped shape ensures stable combustion up to a lower combustion amount,
Flashback can be suppressed.

According to a ninth aspect of the present invention, the burner cap is made of a metal plate such as stainless steel which has heat resistance and corrosion resistance and is excellent in press workability. This makes it possible to easily form the above-described slit flame port group.

According to a tenth aspect of the present invention, there is provided a top plate having a stove opening portion, a juice tray having a burner opening portion provided in the stove opening portion, and a gotoku provided above the juice receiving plate. It is provided with the above-mentioned burner provided in the burner opening part, and the claw body of Gotoku is arranged above the ridgeline of the burner cap. By shortening the flame and the flame holding structure of the burner, and the virtue claws correspond to the ridge of the burner cap, by minimizing the breaking of the flame, the distance between the pot and the burner is reduced. Even so, stable combustion with little emission of CO and the like can be realized, and furthermore, a wide range of strength and weakness can be secured, so that high heat efficiency and good cooking performance can be secured.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

(Embodiment 1) Embodiment 1 will be described with reference to FIGS.

In FIG. 1, reference numeral 11 denotes a burner main body, which is composed of a heat-resistant metal mixing pipe portion 12 of a fuel premixed gas and an annular mixing chamber 15 formed by an inner peripheral wall 13 and an outer peripheral wall 14. The space surrounded by the inner peripheral wall 13 forms a penetrating air port 16. 17 is SUS30
4. A burner cap formed by molding a sheet metal material excellent in heat resistance and corrosion resistance and press workability such as austenitic stainless steel such as SUS316 and SUS321 or ferritic stainless steel such as SUS430 and SUS436 into a substantially hexagonal truncated pyramid shape. There is an opening 18 corresponding to the opening 16, from the upper part to the lower part of the burner cap 17, forms an inclined surface 20 inclined in the outer peripheral direction with a ridgeline 19 as a boundary, and forms a slit flame port group 21 penetrating the inclined surface 20. The flame outlets 22 are vertically scattered. The slit flame port group 21 includes an upper flame port 24 and a lower flame port 25 which are vertically divided via a non-flame port portion 23.

Further, referring to FIG.
Has a slit width reduced from the downstream side 26 to the upstream side 27 of the premixed gas.
Reference numeral 28 denotes a boiling juice shield provided with an opening cylinder 29 substantially at the center. The opening cylinder 29 is fitted into the opening 18 of the burner cap 17 so that the upper part of the burner cap 17 and the boiling juice shield 28
Is in close contact. The boiling juice shield 28 has an outer dimension of the outer peripheral portion larger by about 1 to 2 mm than an outer dimension of a lower portion of the flame opening 22, and has a substantially regular hexagon that is slightly larger than the burner cap 17 when viewed from above. And has a structure including the flame outlet 22. In addition, as a material of the broth shielding body 28, besides a forging material such as brass, a heat-resistant and corrosion-resistant material similar to the burner cap 7, a ceramic molded body, aluminum and the like can be used. The burner A is constituted by the above-described burner main body 11, the burner cap 17, and the boiling shield 28.

In the structure of the burner A, the premixed gas is sucked through the mixing pipe section 12 and diffuses uniformly into the mixing chamber 15 to form a flame at the flame port 22. At this time, the flame formed by the flame outlet 22 is generated obliquely upward along the inclined surface 20, but passes through the outer peripheral portion of the burner cap 17 and the air port 16 of the burner main body 11 to open the cylinder of the boiling shield 28. From 29, the air is caught by the secondary air flowing in as an ascending airflow, so that the combustion is promoted in the vicinity of the flame opening 22 to become a high-temperature flame, and at the same time, it is directed upward.

Further, since the slit flame port group 21 is provided on the inclined surface 20 corresponding to the rectangular surface of the frustum of the hexagonal pyramid of the burner cap 17, the flame formed by each inclined surface 20 has the ridgeline 19
, And the flame length can be prevented from elongating due to interference between the flames. Further, the flame opening 22 is a non-flame opening 23.
The upper flame port 24 and the lower flame port 25 are divided into upper and lower flames, so that the entire flame is generated almost directly upward to promote the concentration of heat.
In order to suppress interference between the upper and lower flames formed by the upper and lower flame ports 25, the length of each flame in the upper and lower parts can be shortened.

As described above, the flame length in the entire flame opening 22 can be shortened. Further, between the lower part of the broth shield 28 and the upper end of the burner cap 17, an upward flame hits the lower part of the broth shield 28, so that stagnation is likely to occur and the flame holding property is improved. Further, by reducing the slit width of the slit flame port group 21 in the longitudinal direction from the downstream side 26 to the upstream side 27 of the premixed gas, the flow rate of the premixed gas is reduced on the downstream side 26 forming the flame. As a result, a stable flame is formed even in a gas that tends to blow off,
Good flame holding properties can be obtained even at low combustion rates.

Therefore, since the heat dissipation can be prevented by concentrating the flame in a wide range from a large combustion amount to a low combustion amount, the burner for a cooker having efficient heat transfer and a wide range of variable heating power can be realized. it can. Further, by dividing the upper burner port 24 and the lower burner port 25, a change in the burner slit width due to long-time use is suppressed, and thus the deformation of the burner cap 17 is prevented, thereby improving the durability of the burner A as a whole. Can be secured. When the slit flame port group 21 is processed, since the inclined surface 20 is flat, the direction of the impact force on the tooth mold of the die for forming the slit flame port group 21 is Since the contact from the oblique direction can be extremely reduced, the life of the mold can be extended. In addition, a plurality of slits can be drilled at the same time, which not only extends the life of the mold, but also shortens the processing time and eventually reduces the processing cost.

Further, the burner cap 17 is made of a material having excellent press workability such as a stainless steel plate, so that the slit width of the flame slit group 21 is usually 0.8 to 1.2 times the plate thickness. Press working is possible within the range, and the degree of freedom in selecting the flame opening shape as described above can be expanded. Therefore, it is easy to optimize the plate thickness and slit width of the burner cap 17 even in the case of a fuel having a high burning rate such as a mixture of hydrogen and air.

(Embodiment 2) Embodiment 2 will be described with reference to FIG.

In FIG. 3, the difference from the first embodiment is that the burner B has a burner cap 30 having a substantially regular hexagonal prism shape.
The flame port 31 is a slit flame port group 34 composed of an upper flame port 32 and a lower flame port 33, and the lower part of the extension of the upper flame port 32 and the upper part of the extension of the lower flame port 33 are the non-flame port 35. By the way.

The components having the same reference numerals as in the first embodiment have the same structure, and the description is omitted.

In the above configuration, the flame is similarly formed at the flame port 31. The secondary air that flows in from the lower periphery of the flame port 31 as an ascending airflow flows into the adjacent upper flame port 32 and lower flame port. It flows into the wide secondary air passage formed by the non-flame port 35 between the nozzles 33 and diffuses sufficiently into the flame, whereby the flame can be shortened. Further, since the burner cap 30 has a substantially regular hexagonal column shape, not only the workability of the slit flame port group 34 and the extension of the mold life can be ensured as in the first embodiment, but also the slit flame port group 34 is opened upward. When used as a cooking burner, it is possible to prevent falling objects, such as boiling, from entering the flame opening.

(Embodiment 3) Embodiment 3 will be described with reference to FIG.

In FIG. 4, the difference from the first embodiment is that the flame port 41 is a slit flame port group 44 composed of an upper flame port 42 and a lower flame port 43. The upper part of the extension of the flame port 43 is a non-flame port part 45, and the lower end part 46 of the upper flame port 42 and the upper end part 47 of the lower flame port 43 are provided side by side.

The components having the same reference numerals as in the first embodiment have the same structure, and a description thereof will be omitted.

In the above configuration, the flame is similarly formed by the flame port 41 and becomes a flame which is similarly shortened by the non-flame port 45, but the lower end 46 of the upper flame port 42 and the lower flame are formed. The overlapping portion of the upper end portion 47 of the port 43 can form a superimposed portion in a part of the flame between the adjacent upper flame port 42 and lower flame port 43, thereby improving the fire transfer.

(Embodiment 4) Embodiment 4 will be described with reference to FIG.

In FIG. 5, the difference from the first embodiment is that the longitudinal sectional shape of the slit flame port group 51 is reduced in the slit width from the downstream side 52 to the upstream side 53 of the premixed gas. The rectifying section 54 is provided with a certain depth. The depth of the rectifying section 54 is 0.5 to 2 mm.
However, 1 mm is desirable from the viewpoint of airflow resistance and the like. The components having the same reference numerals as those in the first embodiment have the same structure, and a description thereof will be omitted.

According to the above configuration, on the downstream side 52 where a flame is formed, the flow velocity of the premixed gas is reduced, and a stable flame is formed even in a gas which is liable to be blown off. A good flame holding property is obtained. On the other hand, even when the plate thickness of the burner cap 17 is small, the rectifying portion 54 can secure a long depth of the flame opening, and as a result, it is possible to suppress flashback even with a gas having a high combustion speed. In the processing of these slit flame port groups 51, a plurality of holes can be easily formed at the same time as in the first embodiment because the inclined surface 20 is a flat surface.

(Fifth Embodiment) A fifth embodiment will be described with reference to FIG.

FIG. 6 is different from the first embodiment in that the slit cross-sectional shape in the longitudinal direction of the slit flame port group 61 is reduced to a stepped shape 64 from the downstream side 62 to the upstream side 63 of the premixed gas. The rectifying section 65 is provided with a depth on the upstream side 63. The depth of the stepped shape is suitably 0.5 to 1 mm.

The components having the same reference numerals as in the first embodiment have the same structure, and a description thereof will be omitted.

According to the above configuration, a more stable flame is formed by the stepped shape 64 on the downstream side 62 where the flame is formed, and good flame holding properties can be obtained even at a low combustion amount.

It should be noted that a plurality of holes can be easily formed at the same time in the processing of the slit flame port group 61.

Embodiment 6 Embodiment 6 will be described with reference to FIG.

In FIG. 7, a stove 74 having a burner opening 73 at the center is placed in a stove opening 72 of a top plate 71, and the burner A shown in the first embodiment is placed in the burner opening 73. In the vicinity of the outer periphery of the juice receiving tray 74, a goto 75 for placing an object to be heated on a frame is arranged.
Also, the claws 76 of Gotoku 75 are each burner cap 17
Are arranged above the ridgeline 19 of the sword.

The components having the same reference numerals as in the first embodiment have the same structure, and a description thereof will be omitted.

According to the above configuration, when a pot or the like is placed on the goto 75 for cooking, the flame 77 formed by the flame opening 22 of the burner A is shortened as described above. Even if the distance between the pot and the burner A is shortened, CO and the like are unlikely to be generated. However, since the claws 76 of the gotoku 75 are disposed above the ridgeline 19 of the burner cap 17, the flame can be minimized. As a result, further lower CO combustion and higher thermal efficiency can be realized. Further, when the amount of combustion is low, the flame holding property can be ensured as described above, so that a state suitable for cooking with low heat can be realized. Therefore, a highly efficient and stable combustion from a large combustion amount to a low combustion amount can be realized, and a cooker excellent in cooking performance can be provided.

[0046]

As apparent from the above description, the following effects can be obtained by the burner of the present invention and the stove using the burner.

According to the first aspect of the present invention, a group of slit flame ports is formed radially in the vertical direction on the inclined surface on the side surface of the burner cap having a substantially polygonal truncated pyramid shape, so that the entire flame is directed almost directly upward. Not only can promote heat concentration, but also reduce flame interference by suppressing flame interference in the plane direction and the vertical direction. Also, regarding the processing of the flame port, since the inclined surface is flat, it is possible to reduce the oblique impact on the tooth mold of the mold for forming the slit flame port group, and it is possible to form a plurality of slits at the same time. The life of the mold can be extended.

According to the second aspect of the present invention, the flame port provided on the side surface of the burner cap having a substantially polygonal prism shape is a group of slit flame ports formed in a vertical direction, thereby improving the workability of the slit. Not only can you secure the slit flame mouth group,
Since there is no upper opening, entry of falling objects such as boiling can be suppressed.

According to the third aspect of the present invention, since the slit flame port group is composed of an upper flame port and a lower flame port which are vertically divided through a non-flame port portion, heat is concentrated almost directly upward. The flame length can be shortened because the non-flame port suppresses interference between the flames formed by the upper flame port and the lower flame port. In addition, by dividing the upper flame opening and the lower flame opening, the change of the flame slit width due to long use is suppressed, and thus the deformation of the burner cap is prevented,
The durability of the burner as a whole can be secured.

According to the fourth aspect of the present invention, the lower part of the extended line of the upper flame port and the upper part of the extended line of the lower flame port are formed as non-flame ports. A secondary air passage is formed between the mouth and the lower flame mouth, which can further shorten the flame.

According to the fifth aspect of the present invention, the lower part of the extension of the upper flame port and the upper part of the extension of the lower flame port are non-flame ports, and the lower end of the upper flame port and the upper end of the lower flame port are formed. Since the lower portion of the upper flame port and the upper portion of the lower flame port are juxtaposed, the fire transfer between the adjacent upper flame port and lower flame port can be improved.

According to the sixth aspect of the present invention, the slit cross section in the longitudinal direction of the slit flame port group is reduced in slit width from the downstream side to the upstream side of the premixed gas, so that the downstream portion has flame holding. It becomes a space, and stable combustion can be secured up to a low combustion amount.

According to the seventh aspect of the present invention, the longitudinal cross-sectional shape of the group of slit flame openings is reduced by reducing the slit width from the downstream side to the upstream side of the premixed gas and increasing the depth on the upstream side. With the provision of the portion, the flame stabilizing property of the downstream portion not only ensures stable combustion up to a low combustion amount, but also suppresses flashback even when the cross section is thin due to the rectifying portion.

According to the eighth aspect of the present invention, the slit cross section in the longitudinal direction of the group of slit flame ports is reduced in a stepped shape from the downstream side to the upstream side of the premixed gas, and the slit width is reduced.
Since the rectifying portion is provided with a depth on the upstream side, stable combustion can be ensured even at a lower combustion amount by the stepped shape, and flashback can be suppressed.

According to the ninth aspect of the present invention, the burner cap is made of a metal plate having heat resistance and corrosion resistance such as stainless steel and excellent in press workability. Can be easily configured.

According to the tenth aspect of the present invention, there is provided a top plate having a stove opening, a juice tray having a burner opening and provided in the stove opening, and a virtue provided above the juice tray. Since the burner provided in the burner opening is provided with the claw body of the virtues above the ridge of the burner cap, the flame shortening configuration and the flame holding configuration of the burner, and the claw body of the virtues are provided. Corresponding to the ridgeline of the burner cap, minimizing flame breaking, stable combustion with less CO emissions even when the distance between the pot and burner is short Since it can be widely secured, high heat efficiency and good cooking performance can be secured.

[Brief description of the drawings]

FIG. 1A is a top view of a burner cap of a burner according to a first embodiment of the present invention. FIG. 1B is a local sectional view of a main part of the burner.

FIG. 2 is an enlarged sectional view of a main part of a flame outlet of the burner.

FIG. 3 is a side view of a burner according to a second embodiment of the present invention.

FIG. 4 is a local sectional view of a main part of a burner according to a third embodiment of the present invention.

FIG. 5 is an enlarged sectional view of a main part of a flame port of a burner according to a fourth embodiment of the present invention.

FIG. 6 is an enlarged sectional view of a main part of a flame port of a burner according to a fifth embodiment of the present invention.

FIG. 7A is a top view showing the positional relationship of the stove of the stove according to the sixth embodiment of the present invention. FIG.

8A is a top view of a conventional burner, and FIG. 8B is a cross-sectional view of the burner.

[Explanation of symbols]

 A, B Burner 11 Burner main body 15 Mixing chamber 17, 30 Burner cap 19 Ridge line 20 Inclined surface 21, 34, 44, 51, 61 Slit flame port group 22, 31, 41 Flame port 23, 35, 45 Non-flame port 24, 32, 42 Upper flame port 25, 33, 43 Lower flame port 26, 52, 62 Downstream side 27, 53, 63 Upstream side 28 Boiled shield 46 Lower end part 47 Upper end part 54, 65 Rectifying part 64 Stepped shape 71 Top plate 72 Stove opening 73 Burner opening 74 Juice tray 75 Gotoku 76 Claw body

Claims (10)

[Claims] A burner main body having a premixed gas mixing chamber formed therein; a substantially polygonal truncated pyramid-shaped burner cap mounted on the burner main body; a broth shield mounted on an upper portion of the burner cap; A burner comprising a flame port provided on an inclined surface on a side surface of the burner cap, wherein the flame port is a group of slit flame ports radially formed in a vertical direction of the inclined surface. 2. A burner main body having a premixed gas mixing chamber formed therein, a substantially polygonal pillar-shaped burner cap mounted on the burner main body, a boiling shield mounted on an upper portion of the burner cap, A burner comprising a flame port provided on a side surface of a burner cap, wherein the flame port is formed as a group of slit flame ports in which the flame port is formed in a vertical direction. 3. The burner according to claim 1, wherein the slit flame port group comprises an upper flame port and a lower flame port, and the upper flame port and the lower flame port are vertically divided via a non-flame port. . 4. A slit flame group comprising an upper flame port and a lower flame port, wherein the lower part of the extension of the upper flame port and the upper part of the extension of the lower flame port are non-flame ports. Burner described. 5. A group of slit flame ports comprises an upper flame port and a lower flame port, wherein the lower part of the extension of the upper flame port and the upper part of the extension of the lower flame port are non-flame ports, and the lower end of the upper flame port. The burner according to claim 1, wherein the burner is provided with an upper end of a lower flame port. 6. The burner according to claim 1, wherein the slit flame port group has a longitudinal sectional shape in which the slit width is reduced from the downstream side to the upstream side of the premixed gas. 7. A group of slit flame ports is provided with a rectifying portion having a longitudinal sectional shape in which a slit width is reduced from a downstream side to an upstream side of a premixed gas and a depth is provided on an upstream side. The burner according to any one of claims 1 to 5. 8. The slit flame port group has a longitudinal cross-sectional shape in which the slit width is reduced stepwise from the downstream side to the upstream side of the premixed gas, and a rectifying section is provided with a depth on the upstream side. The burner according to claim 1. 9. The burner cap has heat resistance and corrosion resistance,
And a metal plate having excellent press workability.
9. The burner according to any one of 8 above. 10. A top plate having a stove opening, a juice tray having a burner opening and provided in the stove opening, a virtue provided above the juice receiving tray, and being provided in the burner opening. A stove comprising the burner according to item 1, wherein the claw body of Gotoku is arranged above the ridge of the burner cap.