JP2020186896A - Burner for stove - Google Patents

Abstract

To provide a burner for a stove capable of preventing spilled broth from flowing therein, and the spilled broth from blocking a burner port.SOLUTION: A burner B for a stove comprises a burner body 2 and an annular burner head 3 mounted on the burner body 2. The burner head 3 comprises a large number of grooves 30a extending radially at intervals in a circumferential direction. The burner body 2 comprises an annular mounting part 21 that forms a burner port P together with the grooves 30a when the burner head 3 is mounted on the burner body 2. The burner port P has, at the bottom, a first surface 21a that gradually inclines upward toward the outside in a radial direction, and a second surface 21b that is located on the outer peripheral side of the first surface 21a and gradually inclines downward toward the outside in the radial direction.SELECTED DRAWING: Figure 5

Description

The present invention relates to a stove burner in which a flame is formed along the outer circumference of the burner head.

Conventionally, it is provided with a burner body that is continuously provided at the downstream end of a mixing pipe that generates a mixed gas of fuel gas and primary air, and an annular burner head that is mounted on the burner body and forms a flame on the outer circumference. Burners for stoves are known. In this type of burner for a stove, a large number of flame holes are formed along the outer circumference of the burner head by placing the burner head on the burner body (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2000-46308

In a burner for a stove as described in Patent Document 1, spillage from a cooking container may be caught in a flame hole. In such a case, depending on the formation position, size, and shape of the flame hole, the spill may infiltrate into the flame hole, and the spill may flow into the inside of the burner. In addition, even if the inflow did not occur, there was a risk that the flame hole would be blocked by the spillage.

The present invention has been made in view of the above points, and an object of the present invention is to provide a burner for a stove that can prevent the inflow of spills into the inside and the blockage of flame holes due to spills.

The burner for the stove of the present invention
It is provided with a burner body connected to the downstream end of a mixing pipe for generating a mixed gas of fuel gas and primary air, and an annular burner head mounted on the burner body to form a flame on the outer periphery. A burner for the stove
One of the burner body and the burner head is provided with a large number of radial grooves at intervals in the circumferential direction.
The burner body and the other of the burner heads are provided with an annular contact portion that contacts the grooved surface of one of the burner body and the burner head.
The large number of grooves and the contact portion form a large number of flame holes when the burner head is placed on the burner body.
The flame hole has a first surface and a second surface located on the outer peripheral side of the first surface at the bottom.
The first surface is gradually inclined upward toward the outside in the radial direction.
The second surface is characterized in that it is gradually inclined downward toward the outer side in the radial direction.

As described above, in the stove burner of the present invention, when the burner head is placed on the burner body, one of the burner head and the burner body comes into contact with the other, so that the contact portion provided on the burner body A flame hole is formed with the groove.

Then, the flame hole is located at the bottom portion (that is, the bottom portion or the contact portion of the groove) of the first surface which is inclined upward in the radial direction and the outer peripheral side of the first surface in the radial direction. It has a second surface that slopes downward toward the outside. That is, the lower surface of the formed flame hole is inclined upward toward the outer side in the radial direction on the inner peripheral side, and is inclined downward toward the outer side in the radial direction on the outer peripheral side.

Here, since the flame is formed on the outer periphery of the burner head, the mixed gas generated in the mixing tube is supplied from the inner peripheral side of the flame hole. Therefore, the mixed gas is rectified as an upward flow at the inner peripheral portion of the flame hole by the lower surface of the inner peripheral portion (that is, the first surface inclined upward in the radial direction).

Then, the mixed gas rectified in this way is guided to the upper surface of the outer peripheral portion of the flame hole (that is, the bottom surface of the groove of the burner head) and ejected from the upper portion of the opening of the flame hole to form a flame. .. At this time, the mixed gas is ejected from the flame hole more vigorously than in the case where such rectification is not performed. As a result, the momentum of the mixed gas prevents the boiling spill from entering the flame hole.

Further, when the spilled spill penetrates into the flame hole without being blown off by the mixed gas, the spilled spill naturally invades from the outer peripheral side of the flame hole. However, the spilled spill that has infiltrated is also discharged from the flame hole along the inclination of the lower surface of the outer peripheral portion of the flame hole (that is, the second surface that gradually inclines downward in the radial direction). Guided in the direction.

Therefore, in the burner for the stove of the present invention, the infiltration of the spill into the flame hole is prevented, and even if the spill invades the flame hole, the spill is discharged from the flame hole. Therefore, it is possible to prevent the inflow of the spill into the inside and the blockage of the flame hole due to the spill.

Further, in the stove burner of the present invention,
It is preferable that the width of the groove in the circumferential direction gradually increases from the outer circumference toward the central portion in the radial direction.

In the burner for the stove of the present invention, the first surface of the bottom of the flame hole is gradually inclined upward toward the radial outer side, and the second surface is gradually inclined downward toward the radial outer side. Therefore, when the width in the circumferential direction of the groove forming the flame hole together with the contact portion (for example, the width in the depth direction of the paper surface in FIG. 5) is constant, the cross-sectional area of the flame hole is from the radial outer side to the radial center portion. It becomes smaller toward.

Then, in general, the spillage penetrates into the flame hole from the outside in the radial direction. Therefore, when a boiling spill invades the flame hole, the infiltrated spill may be guided toward the central portion in the radial direction in which the cross-sectional area of the flame hole becomes narrow due to the capillary phenomenon.

Therefore, if the width of the groove in the circumferential direction is increased from the outer periphery toward the center in the radial direction in this way, the change in the cross-sectional area of the flame hole in the radial direction is suppressed. As a result, it is possible to prevent the spillage that has infiltrated into the flame hole from moving toward the inner peripheral side of the flame hole due to the capillary phenomenon. As a result, it is possible to further prevent the inflow of the spill into the inside and the blockage of the flame hole due to the spill.

Further, in the stove burner of the present invention,
The groove is provided in the burner head.
The contact portion is provided on the burner body.
The burner body has a tubular peripheral wall portion extending downward from the outer peripheral end of the contact portion.
The outer diameter of the peripheral wall portion is preferably equal to or less than the outer diameter of the burner head.

With this configuration, when the spill has infiltrated into the flame hole, the spill guided by the lower surface (that is, the second surface) of the outer peripheral portion of the flame hole passes through the outer peripheral edge of the contact portion. It is guided to the peripheral surface of the peripheral wall and smoothly discharged to the outside of the flame hole. As a result, it is possible to further prevent the inflow of the spill into the inside and the blockage of the flame hole due to the spill.

When the outer diameter of the peripheral wall portion and the outer diameter of the burner head are substantially the same, the appearance is unified, so that the aesthetic appearance can be improved. Further, when the outer diameter of the burner head is larger than the outer diameter of the peripheral wall portion, a portion that is not in contact with the contact portion of the burner body is formed on the outer peripheral edge portion of the burner head. As a result, the spilled spill that has infiltrated from that portion can be dropped before it invades into the radial inside of the flame hole, and can be discharged from the flame hole more smoothly.

The perspective view of the burner for the stove which concerns on embodiment. A side view of the stove burner of FIG. FIG. 1 is a sectional view taken along line III-III of the burner for the stove of FIG. The bottom view which shows the part of the burner head of the burner for the stove of FIG. 1 enlarged. An enlarged view of a main part of the burner for the stove in FIG.

Hereinafter, the stove burner B according to the present embodiment will be described with reference to the drawings. The stove burner B is mounted on a table stove, a built-in stove, or the like.

First, a schematic configuration of the burner B for the stove will be described with reference to FIGS. 1 to 4.

As shown in FIGS. 1 and 2, the stove burner B includes a mixing pipe 1, a burner body 2 connected to the downstream end of the mixing pipe 1, and an annular burner mounted on the burner body 2. It has a head 3. The mixing tube 1 and the burner body 2 are made of sheet metal, and in the stove burner B, they are integrally formed. The burner head 3 is die-cast.

The mixing pipe 1 takes in the fuel gas ejected from the gas nozzle (not shown) together with the primary air, thereby generating a mixed gas of the fuel gas and the primary air inside the mixing pipe 1. In the mixing pipe 1, the upper member 10 forming the upper half thereof and the lower member 11 forming the lower half thereof are airtightly connected to each other at their outer peripheral edges by using a caulking stopper or the like. Is formed by.

As shown in FIG. 3, the burner body 2 includes a base portion 20 to which the mixing pipe 1 is continuously provided. The base portion 20 has an outer cylinder portion 20a (peripheral wall portion) connected to the upper member 10 of the mixing pipe 1 and an inner cylinder portion 20b connected to the lower member 11 of the mixing pipe 1. There is. Although the burner body 2 is made of sheet metal in the present embodiment, it may be made of cast metal or die-cast.

The outer cylinder portion 20a and the inner cylinder portion 20b are connected to each other together with the connection between the upper member 10 and the lower member 11. As a result, a hollow distribution chamber 20c connected to the downstream of the mixing pipe 1 is formed between the outer cylinder portion 20a and the inner cylinder portion 20b.

Further, the burner body 2 has an annular mounting portion 21 (contact portion, bottom portion of the flame hole P) extending inward in the radial direction from the upper end edge of the outer cylinder portion 20a. An annular portion 30 described later of the burner head 3 is mounted on the mounting portion 21.

Further, the upper end edge of the inner cylinder portion 20b extends inward in the radial direction. From the upper end edge of the inner cylinder portion 20b, a tubular positioning cylinder portion 22 extends downward. A tubular portion 31 of the burner head 3, which will be described later, is fitted to the positioning tubular portion 22. As a result, the burner head 3 is positioned with respect to the burner body 2.

The burner head 3 has an annular portion 30 and a tubular portion 31 extending downward from the inner peripheral edge of the annular portion 30. The annular portion 30 is mounted on the mounting portion 21 of the burner body 2. The tubular portion 31 is inserted into and fitted into the positioning tubular portion 22 of the burner body 2. Although the burner head 3 is made of die-cast in this embodiment, it may be made of sheet metal or cast.

As shown in FIG. 4, a large number of grooves 30a extending in the radial direction to the outer periphery of the annular portion 30 are formed on the lower surface of the annular portion 30 at intervals in the circumferential direction. As shown in FIG. 3, the annular portion 30 is placed on the burner body 2 so that its lower surface abuts on the mounting portion 21 of the burner body 2.

When the burner head 3 is mounted on the burner body 2, a large number of flame holes P (see FIG. 5) arranged in the circumferential direction are formed by the groove 30a and the mounting portion 21 (FIGS. 1 and 2). reference). As a result, a large number of flames are formed on the outer circumference of the burner head 3 during use.

Next, with reference to FIGS. 4 and 5, the mounting portion 21 and the annular portion 30 forming the flame hole P will be described in detail.

As shown in FIG. 5, the mounting portion 21 of the burner body 2 is located on the annular first surface 21a and the outer peripheral side of the first surface 21a at a position where the lower surface of the annular portion 30 of the burner head 3 abuts. It has an annular second surface 21b. The second surface 21b is connected to the first surface 21a on the inner side in the radial direction, and is continuously provided on the outer peripheral end of the outer cylinder portion 20a of the base portion 20 on the outer side in the radial direction.

In the cut surface including the central axis a (see FIG. 3) of the outer cylinder portion 20a to which the mounting portions 21 are continuously provided, the first surface 21a linearly and gradually inclines upward in the radial direction. ing. On the other hand, the second surface 21b is curvedly inclined downward gradually toward the outer side in the radial direction.

The lower surface of the annular portion 30 of the burner head 3 abuts on the burner body 2 so as to straddle the first surface 21a and the second surface 21b of the burner body 2. Therefore, the shape of the lower surface of the annular portion 30 is a shape corresponding to the first surface 21a and the second surface 21b.

Specifically, in the cut surface including the central axis of the annular portion 30 (in the present embodiment, the axis that coincides with the central axis a (see FIG. 3) of the outer cylinder portion 20a), the lower surface of the annular portion 30 is in the radial direction. On the inside, it is linearly inclined upward gradually toward the outer side in the radial direction so as to correspond to the inclination of the first surface 21a. On the other hand, the radial outer side is curvedly inclined downward toward the radial outer side so as to correspond to the inclination of the second surface 21b.

The bottom of the groove 30a formed on the lower surface of the annular portion 30 of the burner head 3 (that is, the bottom of the flame hole P (see FIG. 5) described later) is linearly radially from the inside to the outside in the radial direction. It gradually slopes upward toward the outside.

In the stove burner B, when the burner head 3 is mounted on the burner body 2, the first surface 21a and the second surface 21b of the mounting portion 21 of the burner body 2 and the lower surface of the annular portion 30 of the burner head 3 A flame hole P is formed in the formed groove 30a.

The upper surface of the flame hole P thus formed is linearly and gradually upward in the radial direction on the cut surface including the central axis a of the outer cylinder portion 20a or the central axis of the annular portion 30. It becomes a sloping one. On the other hand, the lower surface of the flame hole P is inclined upward toward the outer side in the radial direction on the inner peripheral side, and is inclined downward toward the outer side in the radial direction on the outer peripheral side.

Here, since the flame is formed on the outer periphery of the burner head 3, the mixed gas generated in the mixing pipe 1 is supplied from the inner peripheral side of the flame hole P (see the arrow shown in FIG. 5). .. Therefore, the mixed gas is rectified as an upward flow at the inner peripheral portion of the flame hole P by the lower surface of the inner peripheral portion (that is, the first surface 21a inclined upward in the radial direction). ..

Then, the mixed gas rectified in this way is guided to the upper surface of the outer peripheral portion of the flame hole P (that is, the bottom surface of the groove 30a of the burner head 3) and is ejected from the upper portion of the opening of the flame hole P. Form a flame. At this time, the mixed gas is ejected from the flame hole P more vigorously than in the case where such rectification is not performed. As a result, the force of the mixed gas prevents the boiling spill from entering the flame hole P.

Further, when the boiling spill has infiltrated into the flame hole P without being blown off by the mixed gas, the spill will naturally infiltrate from the outer peripheral side of the flame hole P. However, the spillage that has infiltrated from the flame hole P is along the inclination of the lower surface of the outer peripheral portion of the flame hole P (that is, the second surface 21b that gradually inclines downward in the radial direction). It is guided in the direction of discharge.

Therefore, in the burner B for the stove, the spillage is prevented from entering the flame hole P, and even if the spillage invades the flame hole P, the spillage is discharged from the flame hole P. Since it is guided in the direction, it is possible to prevent the inflow of the boiling spill into the inside and the blockage of the flame hole P due to the boiling spill.

By the way, in the burner B for the stove, the first surface 21a forming the flame hole P together with the groove 30a of the burner head 3 is gradually inclined upward in the radial direction, and the second surface 21b is directed outward in the radial direction. It gradually slopes downward.

Here, the burner head 3 is made of die-cast. Therefore, in order to facilitate die cutting at the time of manufacturing, the groove 30a of the burner head 3 becomes wider in the circumferential direction (width in the depth direction of the paper surface in FIG. 5) as it approaches downward in the vertical direction. It is formed like this. On the other hand, in the radial direction (the left-right direction of the paper surface in FIG. 5), the width in the circumferential direction is constant.

Therefore, the cross-sectional area of the flame hole P formed by the first surface 21a and the second surface 21b and the groove 30a becomes smaller from the radial outer side toward the radial center portion.

Then, in general, the spillage penetrates into the flame hole P from the outside in the radial direction. Therefore, when a boiling spill invades the flame hole P, the invading spill may be guided toward the central portion in the radial direction in which the cross-sectional area of the flame hole becomes narrow due to the capillary phenomenon.

Therefore, as shown in FIG. 4, the burner B for the stove is configured so that the width of the groove 30a in the circumferential direction is gradually increased from the outer periphery toward the central portion in the radial direction.

With this configuration, changes in the cross-sectional area of the flame hole P in the radial direction are suppressed. As a result, it is possible to prevent the boiled spill that has infiltrated into the flame hole P from moving toward the inner peripheral side of the flame hole P due to the capillary phenomenon. As a result, it is possible to further prevent the inflow of the spill into the inside and the blockage of the flame hole P due to the spill.

Further, as shown in FIG. 5, in the stove burner B, the outer cylinder portion 20a (peripheral wall portion) of the base portion 20 extends downward from the outer peripheral end of the second surface 21b of the mounting portion 21. There is. In addition to this, as shown in FIG. 3, the outer diameter of the outer cylinder portion 20a coincides with the outer diameter of the burner head 3 (specifically, the outer diameter of the annular portion 30).

This is because, when the spill has infiltrated into the flame hole P, the spill guided by the lower surface of the outer peripheral portion of the flame hole P (that is, the second surface 21b of the mounting portion 21) is the mounting portion. This is because it is guided to the peripheral surface of the outer cylinder portion 20a via the outer peripheral end of 21 so that it is smoothly discharged to the outside of the flame hole P. In addition, as a result, the appearance is unified and the aesthetic appearance is improved.

Even when the outer diameter of the burner head 3 is larger than the outer diameter of the outer cylinder portion 20a, the flame hole P is formed in the same manner as when the outer diameter of the outer cylinder portion 20a and the outer diameter of the burner head 3 are matched. The boiled spill that has infiltrated is guided to the peripheral surface of the outer cylinder portion 20a via the outer peripheral end of the mounting portion 21, and is smoothly discharged to the outside of the flame hole P.

Further, in this configuration, a portion that is not in contact with the mounting portion 21 of the burner body 2 is formed on the outer peripheral edge portion of the annular portion 30 of the burner head 3. As a result, the boiled spill that has infiltrated from that portion can be dropped before invading into the radial inside of the flame hole P, and can be discharged from the flame hole P more smoothly.

Although the illustrated embodiment has been described above, the present invention is not limited to such an embodiment.

For example, in the above embodiment, as shown in FIG. 5, a groove 30a is provided in the burner head 3, a mounting portion 21 as a contact portion is provided in the burner body 2, and the groove 30a and the mounting portion 21 are used. , Forming a flame hole P. However, the burner for the stove of the present invention is not limited to such a configuration, and a contact portion is provided on the burner head, a groove is provided on the burner body, and a flame hole is formed by the contact portion and the groove. It may be formed. In that case, the first surface and the second surface will be formed at the bottom of the groove.

Further, for example, in the above embodiment, as shown in FIG. 5, the first surface 21a and the second surface 21b of the mounting portion 21 are connected to each other.

However, the first and second aspects of the present invention are not limited to such a configuration. For example, although not shown, a third annular surface extending horizontally or extending so as to have a different inclination from the first and second surfaces is provided between the first surface and the second surface. It may be formed.

Further, in the above embodiment, as shown in FIG. 5, the first surface 21a of the mounting portion 21 of the burner body 2 is linearly inclined, and the second surface 21b is curvedly inclined. There is.

However, the first surface of the present invention may be inclined upward gradually toward the outer side in the radial direction, and the second surface may be inclined downward gradually toward the outer side in the radial direction. For example, although not shown, the first surface may be curvedly inclined, or the second surface may be linearly inclined.

Further, in the above embodiment, as shown in FIG. 5, the bottom portion (that is, the upper surface of the flame hole P) of the groove 30a formed on the lower surface of the annular portion 30 of the burner head 3 is radially from the inside to the outside. It slopes linearly and gradually upward toward the outside in the radial direction.

However, the upper surface of the flame hole of the present invention is not limited to such a configuration. For example, although not shown, the upper surface of the flame hole may be curvedly inclined, or may be gradually inclined downward toward the outside in the radial direction. Further, the upper surface of the flame hole does not have to be inclined in the radial direction.

Further, in the above embodiment, as shown in FIG. 4, the width of the groove 30a of the burner head 3 in the circumferential direction is configured to gradually increase from the outer circumference toward the central portion in the radial direction. This is to prevent the spillage that has infiltrated into the flame hole from moving toward the inner peripheral side of the flame hole due to the capillary phenomenon.

However, the width of the groove of the burner head of the present invention in the circumferential direction is not limited to such a configuration. For example, although not shown, the circumferential width of the groove may be the same at any position in the radial direction, or may be configured to gradually decrease toward the outer side in the radial direction.

Further, in the above embodiment, as shown in FIGS. 2 and 3, the outer diameter of the outer cylinder portion 20a (peripheral wall portion) of the burner body 2 and the outer diameter of the burner head 3 are made to match.

However, the present invention is not limited to such a configuration. For example, as described in the above embodiment, the outer diameter of the peripheral wall portion may be larger than the outer diameter of the burner head. On the contrary, although not shown, the outer diameter of the peripheral wall portion may be smaller than the outer diameter of the burner head.

1 ... Mixing pipe, 2 ... Burner body, 3 ... Burner head, 10 ... Upper member, 11 ... Lower member, 20 ... Base part, 20a ... Outer cylinder part (peripheral wall part), 20b ... Inner cylinder part, 20c ... Distribution chamber , 21 ... Mounting portion (contact portion, bottom of flame hole), 21a ... 1st surface, 21b ... 2nd surface, 22 ... Positioning tubular portion, 30 ... annular portion, 30a ... Groove, 31 ... Cylindrical portion, B ... Burner for stove, P ... Flame hole, a ... Central axis.

Claims (3)

It is provided with a burner body connected to the downstream end of a mixing pipe for generating a mixed gas of fuel gas and primary air, and an annular burner head mounted on the burner body to form a flame on the outer periphery. A burner for the stove
One of the burner body and the burner head is provided with a large number of radial grooves at intervals in the circumferential direction.
The burner body and the other of the burner heads are provided with an annular contact portion that contacts the grooved surface of one of the burner body and the burner head.
The large number of grooves and the contact portion form a large number of flame holes when the burner head is placed on the burner body.
The flame hole has a first surface and a second surface located on the outer peripheral side of the first surface at the bottom.
The first surface is gradually inclined upward toward the outside in the radial direction.
The second surface is a burner for a stove, which is characterized in that it is gradually inclined downward toward the outside in the radial direction. In the stove burner according to claim 1,
A burner for a stove, characterized in that the width of the groove in the circumferential direction gradually increases from the outer periphery toward the central portion in the radial direction. In the stove burner according to claim 1 or 2.
The groove is provided in the burner head.
The contact portion is provided on the burner body.
The burner body has a tubular peripheral wall portion extending downward from the outer peripheral end of the contact portion.
A burner for a stove, wherein the outer diameter of the peripheral wall portion is equal to or smaller than the outer diameter of the burner head.

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