JP2021124271A - Stove burner - Google Patents

Abstract

To provide a stove burner in which a plurality of burner ports 64 extending vertically is provided in an outer cylindrical part 62 of a burner head 5 at intervals in a circumferential direction, and which can prevent backfire even in a case where a circumferential width of each burner port 64 is widened, to reduce the diameter of the burner head 5.SOLUTION: In a burner head 5, a laminate 7 formed by laminating a plurality of sheet metal annular plates 71 with a gap in a vertical direction is arranged. An air-fuel mixture is configured to be ejected from each flame hole 64 through the gaps between the annular plates 71, 71 of the laminate 7.SELECTED DRAWING: Figure 2

Description

The present invention relates to a stove burner including a burner head mounted on a burner body that rises from the downstream end of the mixing tube.

Conventionally, in this type of control burner, the burner head is assumed to have an inner cylinder portion on the inner peripheral side, an outer cylinder portion on the outer peripheral side, and an upper lid portion straddling between the upper ends of the inner cylinder portion and the outer cylinder portion. , A plurality of slit-shaped flame holes extending in the vertical direction and narrow in the circumferential direction are provided in the outer cylinder portion with intervals in the circumferential direction, and the air-fuel mixture supplied from the burner body is ejected from these flame holes into the burner head. It is known that this is done (see, for example, Patent Document 1). In this case, the reason why the flame hole is slit-shaped is to set the circumferential width of the flame hole to be equal to or less than the flame extinguishing distance to prevent flashback when the heat is reduced.

By the way, in order to improve the thermal efficiency, it is desired to reduce the diameter of the burner head so that the flame does not protrude significantly to the outside of the cooking container even if the heating power of the stove burner is high. Further, in order to secure a sufficient amount of air sucked into the mixing pipe, it is necessary to increase the total opening area of the flame holes to a certain extent or more to reduce the ejection resistance of the air-fuel mixture. Here, if the diameter of the burner head is reduced, the number of flame holes that can be formed in the outer cylinder portion of the burner head is reduced. Therefore, in order to avoid a decrease in the total opening area of the flame holes, it is necessary to widen the circumferential width of each flame hole. However, this causes a flashback on low heat. Therefore, in the stove burner of the above-mentioned conventional example, it is difficult to reduce the diameter of the burner head.

Japanese Unexamined Patent Publication No. 2001-215005

In view of the above points, it is an object of the present invention to provide a stove burner capable of reducing the diameter of the burner head by preventing flashback even if the circumferential width of each flame hole is widened. There is.

In order to solve the above problems, the present invention is a stove burner including a burner head mounted on a burner body rising from the downstream end of the mixing pipe. A head body having an outer cylinder portion on the outer peripheral side and an upper lid portion straddling the upper ends of the inner cylinder portion and the outer cylinder portion, and a sheet metal annular plate arranged in the head body have a vertical gap. It is composed of a laminated body in which a plurality of sheets are laminated, and a plurality of flame holes extending in the vertical direction are provided in the outer cylinder portion at intervals in the circumferential direction, and a mixture supplied from the burner body into the head body. It is characterized in that Qi is ejected from each flame hole through a gap between each annular plate of the laminated body.

According to the present invention, even if the circumferential width of each flame hole is wide, flashback on low heat can be prevented by making the gap between the annular plates equal to or less than the flame extinguishing distance. Since the circumferential width of each flame hole can be widened, the diameter of the burner head can be reduced without reducing the total opening area of the flame hole to the left, and the thermal efficiency can be improved.

Further, in the present invention, it is desirable that each flame hole is formed so that the width in the circumferential direction gradually narrows downward. According to this, the secondary air is surely supplied from the lower part to the upper part of the flame hole along the outside of the burner head. As a result, the combustibility at the upper part of the flame hole, which efficiently contributes to the heating of the cooking container, is improved, and the upper part of the flame hole is widened to increase the calorific value of combustion there, further improving the thermal efficiency.

Further, in the present invention, it is desirable that a fire transfer flame hole having a length shorter in the vertical direction than the flame hole is provided in the upper part of the outer cylinder portion so as to be located between the flame holes adjacent to each other in the circumferential direction. Here, it is possible to provide the flame transfer flame hole in the lower part of the outer cylinder portion, but if it is provided in the upper part as described above, the flame of the fire transfer flame hole also contributes to the heating of the cooking container and the thermal efficiency is improved. Useful for.

Further, in the present invention, it is desirable that each annular plate is inclined upward in the radial direction. According to this, the air-fuel mixture is ejected diagonally upward from the flame hole through the gap between the annular plates. Therefore, the spread of the flame to the outside is suppressed, and the thermal efficiency is further improved.

Further, in the present invention, it is desirable that a distribution member for equalizing the circumferential distribution of the air-fuel mixture flowing toward the arrangement portion of the laminated body is provided on the lower side of the laminated body. According to this, a flame is evenly formed in the flame holes at any position in the circumferential direction of the outer cylinder portion, and the uniformity of heating of the cooking container can be ensured.

By the way, in order to secure a gap between the annular plates, it is possible to insert a spacer between the annular plates, but this increases the number of parts. Therefore, in the present invention, the convex portions projecting to one of the upper and lower sides are curved at a plurality of locations in the circumferential direction of each annular plate, and the phases of the annular plates adjacent to the upper and lower sides are changed to provide the convex portions of each annular plate. It is desirable to secure a gap between the annular plates by bringing each convex portion of the annular plate adjacent to the upper and lower sides of the annular plate into contact with the non-curved portion. According to this, a spacer is not required, the number of parts does not increase, and the cost can be reduced.

The perspective view of the main part of the stove provided with the stove burner of embodiment of this invention. The cut side view cut by the line II-II of FIG. The cut plan view cut along the line III-III of FIG. FIG. 3 is a perspective view of an annular plate which is a component of a laminated body provided in the stove burner of the embodiment.

With reference to FIGS. 1 and 2, reference numeral 1 denotes a top plate of a stove, and the stove burner 2 according to the embodiment of the present invention is installed so as to face the burner opening 11 opened in the top plate 1. On the top plate 1, a trivet 12 having a plurality of trivet claws 12a is placed so as to surround the burner opening 11, and also covers a gap between the burner opening 11 and the stove burner 2. The covering 13 is placed on it.

The stove burner 2 includes a mixing pipe 3, a burner body 4 that rises from the downstream end of the mixing pipe 3 and is inserted into the burner opening 11, and a burner head 5 that is placed on the burner body 4. The fuel gas injected from the nozzle (not shown) facing the inflow port 31 at the upstream end of the mixing pipe 3 and the primary air sucked from the inflow port 31 due to the injection of the fuel gas are mixed and mixed in the mixing pipe 3. Qi is generated.

The burner body 4 has a double inner and outer tubular shape, and has an inner tubular portion 41 on the inner peripheral side and an outer tubular portion 42 on the outer peripheral side. Then, the air-fuel mixture from the mixing pipe 3 flows into the space between the inner cylinder portion 41 and the outer cylinder portion 42 of the burner body 4. The inner cylinder portion 41 is composed of a lower half portion 41a made of sheet metal integrally molded with the mixing pipe 3 and an upper half portion 41b made of sheet metal connected to the upper end thereof, and the outer cylinder portion 42 is also formed. It is composed of a lower half portion 42a made of sheet metal integrally molded with the mixing pipe 3 and an upper half portion 42b made of sheet metal bonded to the upper end thereof.

The burner head 5 includes a head body 6 having an inner cylinder portion 61 on the inner peripheral side, an outer cylinder portion 62 on the outer peripheral side, and an upper lid portion 63 straddling between the inner cylinder portion 61 and the upper ends of the outer cylinder portion 62, and a head. It is composed of a laminated body 7 formed by laminating a plurality of sheet metal annular plates 71 arranged in the main body 6 with a gap in the vertical direction. The outer cylinder portion 62 of the head body 6 is provided with a plurality of flame holes 64 extending in the vertical direction at intervals in the circumferential direction. Then, the air-fuel mixture supplied from the burner body 4 into the head body 6 is ejected from the flame holes 64 through the gaps between the annular plates 71 and 71 of the laminated body 7. Further, in the upper part of the outer cylinder portion 62, a fire transfer flame hole 65 having a length shorter in the vertical direction than the flame hole 64 is provided so as to be located between the flame holes 64 and 64 adjacent to each other in the circumferential direction. In the circumferential portion of the outer cylinder portion 62 located in the same direction as each of the trivet claws 12a, the distance between the flame holes 64 and 64 is widened so that the flame does not touch the trivet claw 12a, and the space between the flame holes 64 and 64 is widened. Two fire transfer flame holes 65, 65 are arranged side by side.

The inner cylinder portion 61 of the head body 6 is made of sheet metal, and the lower portion thereof is internally fitted in the upper half portion 41b of the inner cylinder portion 41 of the burner body 4. Further, the outer cylinder portion 62 of the head body 6 is fitted onto the lower half portion 62a made of sheet metal, which is internally fitted into the upper half portion 42b of the outer cylinder portion 42 of the burner body 4, and the upper end portion of the lower half portion 62a. It is composed of a sheet metal upper half 62b that is fixed in a state. The flame hole 64 and the fire transfer flame hole 65 are formed in the upper half portion 62b of the outer cylinder portion 62. Further, an upper lid portion 63 is integrally molded at the upper end of the upper half portion 62b, and a portion near the inner circumference of the covering 13 is covered from above at the lower end of the upper half portion 62b, so that the spilled juice is burned. A skirt portion 62c that prevents the skirt portion 62c from falling into the opening 11 is integrally molded.

An annular distribution member 66 made of an inner bending flange is integrally molded at the upper end of the lower half portion 62a of the outer cylinder portion 62. Then, the laminated body 7 is inserted between the upper half portion 62b of the outer cylinder portion 62 and the inner cylinder portion 61, and the laminated body 7 is supported from below by the distribution member 66 under the outer cylinder portion 62. The half portion 62a and the upper half portion 62b are combined to assemble the burner head 5. A presser cylinder 67 for holding the laminated body 7 is interposed between the laminated body 7 and the upper lid portion 63.

As shown in FIG. 3, six arc-shaped distribution holes 66a are formed in the distribution member 66 at equal intervals in the circumferential direction. Then, the radial width of the distribution hole 66a of # 1 closest to the mixing pipe 3 is suppressed so that the air-fuel mixture flows more toward the arrangement portion of the laminated body 7 on the upper side of the distribution member 66 on the side closer to the mixing pipe 3. In order to make it the narrowest, the radial width of the distribution holes 66a of # 2 and # 3 on both sides of the distribution hole 66a of # 1 is made wider than that of the distribution hole 66a of # 1, and the remaining # 4 and # 5 are used. , The radial width of the distribution hole 66a of # 6 is wider than that of the distribution holes 66a of # 2 and # 3. As a result, the circumferential distribution of the air-fuel mixture flowing toward the arrangement portion of the laminated body 7 can be equalized.

With reference to FIG. 4, each annular plate 71, which is a component of the laminated body 7, is fitted into the outer annular portion 71a that is internally fitted into the outer cylinder portion 62 of the head body 6 and the inner cylinder portion 61 of the head body 6. It has an inner annular portion 71b and a plurality of peripheral bridge portions 71c connecting the outer and inner annular portions 71a and 71b. Convex portions 71d projecting downward are curved at a plurality of locations in the circumferential direction of the outer annular portion 71a. Then, by changing the phase of the annular plates 71 and 71 adjacent to the top and bottom, each convex portion 71d of each annular plate 71 is placed in a portion where the convex portion 71d of the annular plate 71 adjacent to the lower side of the annular plate 71 is not formed. By abutting them, a gap between the annular plates 71 and 71 is secured. Specifically, three convex portions 71d are curved at 120 ° intervals in the circumferential direction on the outer peripheral edge portion of the outer annular portion 71a, and the phases of the vertically adjacent annular plates 71 and 71 are changed by 60 °. ..

Further, each annular plate 71, specifically, the outer annular portion 71a of each annular plate 71 is inclined upward in the radial direction. In the present embodiment, a downwardly bent edge portion 71e is formed on the inner circumference of the inner annular portion 71b of each annular plate 71. Then, the bent edge portion 71e of each annular plate 71 is brought into contact with the inner peripheral edge of the inner annular portion 71b of the annular plate 71 adjacent to the lower side of the annular plate 71, and the gap between the annular plates 71 and 71 is on the inner peripheral side. But I try to secure it.

According to the above configuration, since the air-fuel mixture is ejected from the flame holes 64 through the gaps between the annular plates 71 and 71, even if the circumferential width of the flame holes 64 is wide, the annular plates 71 and 71 By setting the gap between them to about 1 mm, which is less than the flame extinguishing distance, it is possible to prevent flashback in low heat. Since the circumferential width of each flame hole 64 can be widened, the diameter of the burner head 5 can be reduced without reducing the total opening area of the flame hole to the left, and the thermal efficiency can be improved. ..

Further, in the present embodiment, as shown in FIG. 1, each flame hole 64 is formed so that the width in the circumferential direction gradually narrows downward. According to this, the consumption of the secondary air supplied from below along the outside of the burner head 5 at the lower part of the flame hole 64 is reduced, and the secondary air is surely supplied to the upper part of the flame hole 64. Will be. As a result, the combustibility at the upper part of the flame hole 64, which efficiently contributes to the heating of the cooking container placed on the trivet 12, is improved, and the upper part of the flame hole 64 becomes wider, so that the amount of heat generated by combustion is increased. It becomes larger and the thermal efficiency is further improved.

Further, in the present embodiment, since each annular plate 71 is inclined upward in the radial direction, the air-fuel mixture is ejected diagonally upward from the flame hole 64 through the gap between the annular plates 71 and 71. do. As a result, the spread of the flame to the outside is suppressed, and the thermal efficiency is further improved.

Further, in the present embodiment, since the fire transfer flame hole 65 is provided in the upper part of the outer cylinder portion 62 of the head body 6, unlike the case in which the fire transfer flame hole is provided in the lower part of the outer cylinder portion 62, the fire transfer flame The flame in the hole 65 also contributes to the heating of the cooking container and helps to improve the thermal efficiency.

Further, in the present embodiment, since the distribution member 66 for equalizing the circumferential distribution of the air-fuel mixture flowing toward the arrangement portion of the laminated body 7 is provided on the lower side of the laminated body 7, the outer cylinder of the head body 6 is provided. A flame is evenly formed in the flame holes 64 at any position in the circumferential direction of the portion 62. As a result, the uniformity of heating of the cooking container can be ensured.

Although the embodiments of the present invention have been described above with reference to the drawings, the present invention is not limited thereto. For example, in order to secure a gap between the annular plates 71 and 71, a spacer may be provided between the annular plates 71 and 71. However, this increases the number of parts. On the other hand, as in the above embodiment, the phases of the vertically adjacent annular plates 71 and 71 are changed, and each convex portion 71d curved on each annular plate 71 is curved by each convex portion 71d of the adjacent annular plate 71. If a gap between the annular plates 71 and 71 is secured by contacting the portion that is not formed, the spacer is not required, the number of parts does not increase, and the cost can be reduced, which is advantageous.

Further, in the above embodiment, the protruding direction of the convex portion 71d curved on each annular plate 71 is downward, but the protruding direction may be upward. In this case, the phases of the annular plates 71 and 71 adjacent to each other are changed so that the convex portions 71d of each annular plate 71 are curved and the convex portions 71d of the annular plate 71 adjacent to the upper side of the annular plate 71 are curved. It suffices to bring it into contact with the part that is not. Further, in the above embodiment, each annular plate 71 has an outer annular portion 71a, an inner annular portion 71b, and a bridge portion 71c, but it is also possible that each annular plate 71 does not have the inner annular portion 71b and the bridge portion 71c. Is.

2 ... stove burner, 3 ... mixing pipe, 4 ... burner body, 5 ... burner head, 6 ... head body, 61 ... inner cylinder, 62 ... outer cylinder, 63 ... upper lid, 64 ... flame hole, 65 ... fire Transfer flame hole, 66 ... distribution member, 7 ... laminate, 71 ... annular plate, 71d ... convex portion.

Claims (6)

A stove burner with a burner head mounted on a burner body that rises from the downstream end of the mixing tube.
The burner head is arranged in a head main body having an inner cylinder portion on the inner peripheral side, an outer cylinder portion on the outer peripheral side, and an upper lid portion straddling between the upper ends of the inner cylinder portion and the outer cylinder portion, and inside the head main body. , It is composed of a laminated body made of a plurality of sheet metal annular plates laminated with a gap in the vertical direction, and a plurality of flame holes extending in the vertical direction are provided in the outer cylinder portion with a space in the circumferential direction. The stove burner is characterized in that the air-fuel mixture supplied from the burner body into the head body is ejected from each flame hole through the gaps between the annular plates of the laminated body. The stove burner according to claim 1, wherein each flame hole is formed so that the width in the circumferential direction gradually narrows downward. 1. Stove burner. The stove burner according to any one of claims 1 to 3, wherein each annular plate is inclined upward in the radial direction. The stove according to any one of claims 1 to 4, wherein a distribution member for equalizing the circumferential distribution of the air-fuel mixture flowing toward the arrangement portion of the laminated body is provided on the lower side of the laminated body. Burner. Convex portions projecting to one of the upper and lower sides are curved at a plurality of locations in the circumferential direction of each annular plate, and the phases of the annular plates adjacent to the upper and lower sides are changed so that each convex portion of each annular plate is formed on one of the upper and lower sides of the annular plate. The stove burner according to any one of claims 1 to 5, wherein a gap between the annular plates is secured by bringing each of the convex portions of the adjacent annular plates into contact with the non-curved portion. ..

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