JP2020173077A - Cooking stove burner - Google Patents

Abstract

To effectively prevent a boiling-over soup flowing down from a cut-out groove 61 from entering inside a burner hole passage 5 in a cooking stove burner 1 in which a plurality of burner hole passages 5 which jet mixed gas are provided in an open manner spaced apart in the circumferential direction on an annular circumferential wall part 12 that is located below an upper wall part 11, a first axial line c of each of the burner hole passages 5 inclines toward one direction in the circumferential directions with respect to the radial direction, an annular bank part 6 is vertically provided on the upper surface of the upper wall part 11, a cut-out groove 61 is formed on a part of the bank part 6 in the circumferential direction, and an eave part 7 projected in the radial direction is provided over a whole circumference on the circumferential surface of the upper wall part 11 located on an upper position than the burner port 51 of the burner port surface of the circumferential wall part 12 or on the burner port surface side of the circumferential wall part 12.SOLUTION: A second axial line C of a cut-out groove 61 inclines toward the other direction in the circumferential directions with respect to the radial direction, and the second axial line C is substantially orthogonal in a planar view to first axial lines c1 and c2 of burner hole passages 5a and 5b, respectively, that are located below the cut-out groove 61.SELECTED DRAWING: Figure 3

Description

The present invention includes an air-fuel mixture chamber to which an air-fuel mixture is supplied, an upper wall portion that covers the air-fuel mixture chamber from above, and an annular peripheral wall portion located below the upper wall portion. The present invention relates to a burner for a stove in which a plurality of flame hole passages for ejecting an air-fuel mixture through the peripheral wall portion are provided at intervals in the circumferential direction.

Conventionally, the downstream end of the flame hole passage is used as the flame port, the surface of the peripheral wall where the flame port opens is used as the flame port surface, and the spilled juice that has fallen on the upper surface flows down to the flame port surface. An annular bank is erected to prevent this from happening, a notch groove is formed in a part of the bank in the circumferential direction, and the entire circumference is formed on the peripheral surface of the upper wall located on the flame port side. There is known a burner for a stove that is provided with an eaves portion that projects in the radial direction (see, for example, Patent Document 1).

In the stove burner described in Patent Document 1, the spilled juice that falls on the upper surface of the upper wall portion and cannot be blocked by the bank portion is allowed to flow down through the notch groove, but the spilled juice that flows down by the eaves portion is a flame. Prevents it from hitting each flame on the mouth.

JP-A-2018-189255

However, regardless of whether it is an internal flame type or an external flame type, even if the eaves are provided, the flow velocity of the burner for the stove is high due to the small amount of spilled juice flowing down from the notch groove or the high viscosity. When it was slow, it was confirmed that the spilled juice wraps around the lower surface of the eaves toward the flame port and invades the inside of the flame hole passage from the flame port. In particular, the phenomenon was remarkable when the amount of the air-fuel mixture ejected from the flame port was small.

An object of the present invention is to provide a burner for a stove that can more effectively prevent the spilled juice flowing down from the notch groove from entering the inside of the flame hole passage.

In order to solve the above problems, the present invention comprises an air-fuel mixture chamber to which an air-fuel mixture is supplied, an upper wall portion that covers the air-fuel mixture chamber from above, and an annular peripheral wall portion located below the upper wall portion. The peripheral wall portion is provided with a plurality of flame hole passages that penetrate the peripheral wall portion and eject the air-fuel mixture at intervals in the circumferential direction, and the first axis, which is the central axis of each flame hole passage, has a diameter. A burner for a stove that is inclined to one side in the circumferential direction with respect to the direction. An annular bank is erected to prevent the spilled juice that has fallen on the upper surface from flowing down to the flame mouth surface, a notch groove is formed in a part of the bank in the circumferential direction, and the peripheral wall In the case where an eaves overhanging in the radial direction is provided on either one of the peripheral surfaces of the upper wall portion located above the flame opening on the flame port surface or on the side of the flame port surface, the cut is cut. The second axis, which is the central axis of the notch groove, is inclined to the other side in the circumferential direction with respect to the radial direction, and the second axis is substantially in plan view with the first axis of the flame hole passage located below the notch groove. It is characterized by being orthogonal.

The infiltration of spilled juice into the flame hole passage is the second axis of the notch groove and the first axis of the flame hole passage located below the notch groove (particularly directly below and in the vicinity of the notch groove). Is likely to occur when and are coincident in plan view or almost parallel to each other. However, according to the present invention, since the second axis of the notch groove is substantially orthogonal to the first axis of the flame hole passage located below the notch groove in a plan view, the spillage flowing down from the notch groove. Even if the juice has a slow flow velocity and wraps around the lower surface of the eaves toward the flame port, it can be kept infiltrated to the vicinity of the flame port. Therefore, it is possible to more effectively prevent the intrusion into the inside of the flame hole passage. The spilled juice that has infiltrated the vicinity of the flame opening can be blown out of the flame opening by the air-fuel mixture that is subsequently ejected from the flame opening, so that the flame opening is less likely to be clogged.

Further, in the present invention, it is desirable that the upper surface of the eaves portion is a tapered surface that inclines downward in the overhanging direction. According to this, the spilled juice can be cut and flowed down at the tip of the upper surface of the eaves in the overhanging direction, and the spilled juice is less likely to run down the lower surface of the eaves. Therefore, it is possible to further prevent the spilled juice from entering the inside of the flame hole passage.

Further, in the present invention, it is desirable that the flame port surface of the peripheral wall portion is inclined downward in the height range of the flame port to the opposite side of the air-fuel mixture ejection direction. According to this, even if a part of the spilled juice wraps around the lower surface of the eaves toward the upper end of the flame mouth, the spilled juice drips away from the lower end of the flame mouth. It is possible to prevent it from getting caught in the flame. Therefore, it is possible to further prevent the spilled juice from entering the inside of the flame hole passage.

The main part perspective view of one Embodiment of the burner for a stove of this invention. FIG. 1 is a cross-sectional view taken along the line AA of the stove burner shown in FIG. The main part plan view of the burner for a stove shown in FIG.

A stove burner 1 according to an embodiment of the present invention will be described below with reference to FIGS. 1 and 2. The burner 1 for the stove is an internal flame type burner. The stove burner 1 is composed of an annular burner body 2, an annular burner head 3 provided on the burner body 2, and a mixing pipe 4 integrally formed with the burner body 2.

The burner body 2 is made of sheet metal, and is composed of a bottom wall portion 21 and an outer peripheral wall portion 22 that rises upward from a joint portion with respect to the outer peripheral portion of the bottom wall portion 21, and includes the bottom wall portion 21 and the outer peripheral wall portion 22. An air-fuel mixture chamber 23 to which an air-fuel mixture of combustion gas and primary air is supplied is formed between them. The air-fuel mixture chamber 23 communicates with the mixing pipe 4. The air-fuel mixture of the fuel gas injected from the gas nozzle (not shown) and the primary air sucked from the inflow port 41 facing the inflow port 41 at the upstream end of the mixing pipe 4 enters the air-fuel mixture chamber 23 via the mixing pipe 4. Is supplied to.

The burner head 3 is made of cast metal, and is composed of a pedestal portion 31 forming an outer peripheral portion and a main body portion 32 forming an inner peripheral portion, which are divided into two in the radial direction and separated from each other. Then, the upper wall portion 11 of the stove burner 1 is formed by the pedestal portion 31 and the upper end portion of the main body portion 32. The pedestal portion 31 has a flange portion 311 that is fixed to the upper end portion of the outer peripheral wall portion 22 of the burner body 2 and projects inward in the radial direction. The main body portion 32 is composed of a flange portion 321 forming an upper end outer peripheral portion and a peripheral wall portion 322 hanging from the inner peripheral end portion of the flange portion 321. The main body 32 is removable from the pedestal 31, and the main body 32 is seated on the pedestal 31 by placing the flange 321 on the flange 311 of the pedestal 31. At the time of this seating, the lower end of the peripheral wall portion 322 is placed on the inner peripheral end portion of the bottom wall portion 21 of the burner body 2. Then, the peripheral wall portion 322 of the main body portion 32 forms the peripheral wall portion 12 of the stove burner 1, and the peripheral wall portion 322 (12) is located below the upper wall portion 11.

A plurality of grooves forming the flame hole passage 5, which are recessed upward from the lower surface, are formed in the peripheral wall portion 322 (12) of the main body portion 32 of the burner head 3 with an interval in the circumferential direction. When the peripheral wall portion 322 (12) is seated on the pedestal portion 31, the lower end of each groove is closed by the inner peripheral end portion of the bottom wall portion 21 of the burner body 2, and the peripheral wall portion 12 of the stove burner 1 is closed. A plurality of flame hole passages 5 penetrating the 12 are opened with a circumferential interval. Each flame hole passage 5 has a flame port 51 at the downstream end, communicates with the air-fuel mixture chamber 23 of the burner body 2, and blows the air-fuel mixture supplied into the air-fuel mixture chamber 23 through the mixing pipe 4. It ejects from 51 inward in the radial direction of the burner 1 for the stove.

Further, in the stove burner 1, an annular bank portion 6 is erected at the inner peripheral end of the upper surface of the main body 32 of the burner head 3, and the bank 6 is on the upper surface of the main body 32 (above the stove burner 1). The spilled juice that has fallen on the upper surface of the wall portion 11 is the surface through which the flame port 51 of the peripheral wall portion 322 (12) of the main body portion 32 opens. The flame port surface 322a (flame port of the peripheral wall portion 12 of the stove burner 1) It is prevented from flowing down to the surface 121). A plurality of notch grooves 61 are formed in a part of the bank portion 6 in the circumferential direction.

Further, in the burner 1 for the stove, the flame port surface 322a (121) of the peripheral wall portion 322 (12) of the main body portion 32 of the burner head 3 is enlarged in the dotted line circle of FIG. 2, and the height of the flame port 51 is as shown. In the range, it is tilted downward to the opposite side of the air-fuel mixture ejection direction.

Then, in the burner 1 for the stove, the burner head 3 projects in the radial direction over the entire circumference above the flame port 51 of the flame port surface 322a (121) of the peripheral wall portion 322 (12) of the main body portion 32. The eaves portion 7 is provided. The upper surface 71 of the eaves portion 7 is a tapered surface that inclines downward in the overhanging direction, as shown by being enlarged in the dotted line circle.

With reference to FIG. 3, the first axis c, which is the central axis of each flame hole passage 5 provided in the peripheral wall portion 322 (12) of the main body portion 32 of the burner head 3, is the radial direction of the peripheral wall portion 322 (12). It is tilted to one side in the circumferential direction at a tilt angle α with respect to (the direction indicated by the alternate long and short dash line in FIG. 3). Due to this inclination, the combustion flame of the burner 1 for the stove swirls in one direction in the circumferential direction, and the heating efficiency of the cooking device is improved. The second axis C, which is the central axis of each notch groove 61 formed in a part of the bank portion 6, is inclined to the other side in the circumferential direction at an inclination angle β with respect to the radial direction, and is below the notch groove 61, that is, two burner port passage 5a which is located straight and in the vicinity of the notched groove 61 are substantially orthogonal with the first axis c _1, c ₂ in a plan view of 5b. Here, “substantially orthogonal” means that the angles θ ₁ and θ ₂ formed by the second axis C of the notch groove 61 and the first axes c ₁ and c ₂ of the flame hole passage are exactly 90 °. Not intended to be. Including errors, for example, a range of about 80 ° to 100 ° is allowed.

By the way, a part of the spilled juice that has fallen on the upper surface of the main body 32 of the burner head 3 flows through the notch groove 61 from the radial outer end to the radial inner end along the second axis C, and the eaves portion. It flows out from the overhanging tip of the upper surface 71 of No. 7 to the inside of the main body 32 in the radial direction. When the flow velocity of the spilled juice is slow due to a small amount of spilled juice or a high viscosity, the spilled juice that flows out travels along the lower surface 72 of the eaves 7 and the flame port 51 of the peripheral wall portion 322 (12). Wrap around towards. At this time, the wraparound direction of the spilled juice is opposite to that when the spilled juice flows through the notch groove 61 from the radial outer end to the radial inner end along the second axis C. Therefore, when the first axis c of the flame hole passage 5 coincides with the second axis C of the notch groove 61 in a plan view or is substantially parallel to each other, the spilled juice that wraps around as described above is the flame port 51. It will invade the inside of the flame hole passage 5 from the upper end.

However, in the burner 1 for the stove of the above embodiment, the second axis C of the notch groove 61 is viewed in plan view with the first axes c ₁ and c ₂ of the flame hole passages 5a and 5b located below the notch groove 61. Since they are substantially orthogonal to each other, the spilled juice that wraps around as described above is the overhanging direction of the upper surface 71 of the eaves 7 in the wraparound direction of the spilled juice among the two rims extending in the height direction of the flame ports 51a and 51b. It is cut off at one of the rims that are far from the tip or at the inner wall of the flame hole passages 5a and 5b located near the rim, and drops. Therefore, even if the spilled juice wraps around the flame ports 51a and 51b along the lower surface 72 of the eaves portion 7, the infiltration of the spilled juice can be limited to the vicinity of the flame ports 51a and 51b, and the flame hole passage 5a, It is possible to more effectively prevent the infiltration of the spilled juice into the inside of 5b. The spilled juice that has infiltrated into the vicinity of the flame ports 51a and 51b can be blown out of the flame ports 51a and 51b by the air-fuel mixture that is subsequently ejected from the flame ports 51a and 51b. The clogging of 51b is unlikely to occur.

Further, since the upper surface 71 of the eaves portion 7 is a tapered surface that inclines downward in the overhanging direction, the spilled juice can be cut and flowed down at the tip of the upper surface 71 of the eaves portion 7 in the overhanging direction. It becomes difficult for the eaves portion 7 to run along the lower surface. Therefore, it is possible to further prevent the spilled juice from entering the inside of the flame hole passages 5a and 5b.

Further, since the flame port surface 322a (121) of the peripheral wall portion 322 (12) is inclined downward in the height range of the flame port 51 in the direction opposite to the ejection direction of the air-fuel mixture, it is one of the spilled juices. Even if the portion travels along the lower surface 72 of the eaves portion 7 and wraps around toward the upper ends of the flame ports 51a and 51b, the spilled juice is dropped to a place away from the lower ends of the flame ports 51a and 51b and the flame ports It is possible to prevent the 51a and 51b from being affected. Therefore, it is possible to further prevent the spilled juice from entering the inside of the flame hole passage 5.

Although the present invention has been described above with respect to one embodiment, the present invention is not limited to the above embodiment. For example, in the above embodiment, the eaves portion 7 is provided on the flame port surface 121 of the peripheral wall portion 12, but may be provided on the peripheral surface of the upper wall portion 11 located on the flame port surface 121 side. Further, in the above embodiment, the flame hole passages 5 located below the notch groove 61 are the two flame hole passages 5a and 5b, but the number of the flame hole passages 5 located below the notch groove 61 is determined. It depends on the circumferential distance of each flame hole passage 5, the inclination angle α, the number of notch grooves 61, the inclination angle β, and the like, and may be one or three or more.

Further, in the burner head 3, the pedestal portion 31 and the main body portion 32 may be integrated. Furthermore, although the bottom wall portion 21 of the burner body 2 is made of sheet metal, it can also be made of cast metal. In this case, an annular wall is erected at the inner peripheral end of the bottom wall portion 21, a groove serving as a flame hole passage 5 is formed in the annular wall, and a burner head 3 is provided so as to be seated on the upper surface of the annular wall. You may. The burner head 3 in this case can be an annular or plate-shaped lid or the like. Although the above embodiment is an internal flame type burner, the present invention can be equally applied to an external flame type burner. In this case, the bank portion 6 is erected at the outer peripheral end of the upper surface of the upper wall portion 11, and the burner head 3 may be referred to as a burner cap.

1 ... Burner for stove, 11 ... Upper wall part, 12 ... Peripheral wall part, 121 ... Flame mouth surface, 23 ... Air-fuel mixture chamber, 5,5a, 5b ... Flame hole passage, 51, 51a, 51b ... Flame mouth, 6 ... Bank, 61 ... notch groove, 7 ... eaves, 71 ... upper surface of eaves 7, c ... first axis of flame hole passage 5, c ₁ , c ₂ ... first axis of flame hole passages 5a, 5b, C ... The second axis of the notch groove 6.

Claims (3)

An air-fuel mixture chamber to which an air-fuel mixture is supplied, an upper wall portion that covers the air-fuel mixture chamber from above, and an annular peripheral wall portion located below the upper wall portion are provided, and the peripheral wall portion is provided with the peripheral wall portion. A plurality of flame hole passages that penetrate and eject the air-fuel mixture are opened with a circumferential interval, and the first axis, which is the central axis of each flame hole passage, is inclined to one side in the circumferential direction. And
The downstream end of the flame hole passage is the flame port, the surface of the peripheral wall where the flame port opens is the flame port surface, and the spilled juice that has fallen on the upper surface flows down to the flame port surface on the upper surface of the upper wall portion. An annular bank is erected to prevent this, and a notch groove is formed in a part of the bank in the circumferential direction, and the position above the flame port of the flame port surface of the peripheral wall or the side of the flame port surface. In the case where one of the peripheral surfaces of the upper wall portion located in is provided with an eaves portion extending in the radial direction over the entire circumference.
The second axis, which is the central axis of the notch groove, is inclined to the other in the circumferential direction with respect to the radial direction, and the second axis is substantially the first axis of the flame hole passage located below the notch groove in a plan view. A burner for a stove, which is characterized by being orthogonal to. The burner for a stove according to claim 1, wherein the upper surface of the eaves portion is a tapered surface that inclines downward in the overhanging direction. The burner for a stove according to claim 1 or 2, wherein the flame port surface of the peripheral wall portion is inclined downward in the height range of the flame port on the opposite side of the air-fuel mixture ejection direction.

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