JP7141798B2 - stove burner - Google Patents

Description

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

Conventionally, the downstream end of the flame hole passage is used as the flame port, and the surface of the peripheral wall portion where the flame port opens is used as the flame port surface, and the spilled juice that has fallen on the upper surface of the upper wall portion flows down to the flame port surface. A notch groove is formed in a part of the circumferential direction of the embankment, and a notch groove is formed in a part of the circumferential direction of the embankment. There is known a stove burner provided with a canopy extending radially over the entire length of the burner (see, for example, Patent Literature 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 embankment flows down through the notch groove, but the spilled juice that flows down due to the eaves catches fire. Prevents exposure to each flame mouth on the mouth.

JP 2018-189255 A

However, regardless of whether the burner is of the internal flame type or the external flame type, even if the overhang is provided in the burner for the stove, the flow rate of the boiled-over juice flowing down from the notched groove is small or high due to the high viscosity. When it is slow, it was confirmed that the spilled juice runs along the underside of the eaves toward the flame hole, and enters the inside of the flame hole passage from the flame hole. In particular, when the amount of air-fuel mixture ejected from the flame port is small, the phenomenon is remarkable.

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

In order to solve the above problems, the present invention provides a mixture chamber to which mixture is supplied, an upper wall portion covering the mixture chamber from above, and an annular peripheral wall portion positioned below the upper wall portion. In the peripheral wall portion, a plurality of flame hole passages that penetrate the peripheral wall portion and eject the air-fuel mixture are opened at intervals in the circumferential direction, and the first axis, which is the central axis of each flame hole passage, has a diameter A stove burner inclined in one circumferential direction with respect to a direction, wherein the downstream end of a flame hole passage is a flame port, the surface of the peripheral wall portion where the flame port opens is a flame port surface, and on the upper surface of the upper wall portion, An annular bank is erected to prevent spilled juice that has fallen on the upper surface from flowing down to the flame mouth surface, and a notch groove is formed in a part of the bank in the circumferential direction, An overhang extending radially over the entire circumference is provided on either the peripheral surface of the upper wall portion positioned above the flame port of the burner surface or on the burner surface side. The second axis, which is the central axis of the notched groove, is inclined in the other circumferential direction with respect to the radial direction, and the second axis is substantially aligned with the first axis of the burner passage located below the notched groove in plan view. It is characterized by being orthogonal.

The infiltration of boiled-over juice into the burner passage is caused by the second axis of the notch groove and the first axis of the burner passage located below the notch groove (especially directly below and near the notch groove). are coincident or substantially parallel to each other in plan view. However, according to the present invention, since the second axis of the notched groove is substantially perpendicular to the first axis of the burner passage located below the notched groove in a plan view, the boiled spills flowing down from the notched groove Even if juice has a slow flow velocity and flows along the lower surface of the eaves toward the flaming port, it can be limited to infiltration up to the vicinity of the flaming port. Therefore, it is possible to more effectively prevent intrusion into the burner hole passage. The spilled juice that has entered the vicinity of the flame port can be blown away from the flame port by the air-fuel mixture that is subsequently ejected from the flame port, so clogging of the flame port is unlikely to occur.

Further, in the present invention, it is desirable that the upper surface of the eaves portion is a tapered surface that slopes downward in the overhanging direction. According to this, the overhanging juice can be cut at the leading end of the overhanging direction of the upper surface of the eaves and allowed to flow down, so that the overhanging juice is less likely to run along the lower surface of the eaves. Therefore, it is possible to further prevent spilled juice from entering the burner passage.

Further, in the present invention, it is desirable that the flame port surface of the peripheral wall portion is inclined downward in the direction opposite to the ejection direction of the air-fuel mixture in the height range of the flame port. According to this, even if part of the boiled-over juice flows along the lower surface of the eaves and wraps around toward the upper end of the flame outlet, the boiled-over juice drips away from the lower end of the flame outlet, It can prevent you from getting burned. Therefore, it is possible to further prevent spilled juice from entering the burner passage.

FIG. 1 is a perspective view of a main part of an embodiment of a stove burner according to the present invention; FIG. 2 is a cross-sectional view of the stove burner shown in FIG. 1 taken along line AA. The principal part top view of the burner for stoves 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. FIG. The stove burner 1 is an internal flame burner. A stove burner 1 comprises an annular burner body 2 , an annular burner head 3 provided on the burner body 2 , and a mixing tube 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 rising upward from a joint portion of the bottom wall portion 21 to the outer peripheral portion. Between them, a mixture chamber 23 is formed into which a mixture of combustion gas and primary air is supplied. The mixture chamber 23 communicates with the mixing tube 4 . A mixture of fuel gas injected from a gas nozzle (not shown) facing an inlet 41 at the upstream end of the mixing pipe 4 and primary air sucked from the inlet 41 flows through the mixing pipe 4 into the mixture chamber 23. supplied to

The burner head 3 is made of casting, 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 parts in the radial direction and separated from each other. 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 is fixed to the upper end portion of the outer peripheral wall portion 22 of the burner body 2 and has a flange portion 311 that protrudes radially inward. The main body portion 32 is composed of a flange portion 321 forming an upper outer peripheral portion and a peripheral wall portion 322 hanging down from an inner peripheral end portion of the flange portion 321 . The body portion 32 is detachable from the pedestal portion 31 , and the body portion 32 is seated on the pedestal portion 31 by placing the flange portion 321 on the flange portion 311 of the pedestal portion 31 . When seated, 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 . The peripheral wall portion 322 of the body portion 32 forms the peripheral wall portion 12 of the stove burner 1 , and the peripheral wall portion 322 ( 12 ) is positioned below the upper wall portion 11 .

The peripheral wall portion 322 (12) of the main body portion 32 of the burner head 3 is provided with a plurality of grooves forming the burner passages 5 recessed upward from the lower surface at intervals 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. A plurality of flame hole passages 5 penetrating through 12 are established at intervals in the circumferential direction. Each flame port passage 5 has a flame port 51 at its downstream end, and communicates with the mixture chamber 23 of the burner body 2 so that the mixture supplied to the mixture chamber 23 through the mixing pipe 4 passes through the flame port. From 51 , it is jetted radially inward of the stove burner 1 .

In the stove burner 1, an annular bank portion 6 is erected on the inner peripheral end of the upper surface of the main body portion 32 of the burner head 3. The spilled juice that has fallen on the upper surface of the wall portion 11) is the flame port surface 322a (the flame port of the peripheral wall portion 12 of the stove burner 1), which is the surface where the flame port 51 of the peripheral wall portion 322 (12) of the main body portion 32 opens. prevent it from running down the surface 121). A plurality of notch grooves 61 are formed in a portion of the bank portion 6 in the circumferential direction.

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

In the stove burner 1, in the burner head 3, the flame port surface 322a (121) of the peripheral wall portion 322 (12) of the body portion 32 protrudes radially above the flame port 51 over the entire circumference. A canopy portion 7 is provided. The upper surface 71 of the eaves portion 7 is a tapered surface that slopes downward in the overhanging direction, as shown in an enlarged view within the dotted line circle.

Referring to FIG. 3, the first axis c, which is the central axis of each burner hole passage 5 formed in the peripheral wall portion 322 (12) of the main body portion 32 of the burner head 3, extends in the radial direction of the peripheral wall portion 322 (12). (the direction indicated by the two-dot chain line in FIG. 3) is inclined to one side in the circumferential direction at an inclination angle α. Due to this inclination, the combustion flame of the burner 1 for the stove circulates in one circumferential direction, thereby improving the heating efficiency of the cooking utensil. The second axis C, which is the center axis of each notch groove 61 formed in a part of the bank portion 6, is inclined in the circumferential direction at an inclination angle β with respect to the radial direction, and below the notch groove 61, that is, It is substantially perpendicular to the first axes c ₁ and c ₂ of the two flame hole passages 5 a and 5 b located directly to and near the notch groove 61 in a plan view. 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 burner passages are exactly 90°. not intended to A range of, for example, about 80° to 100° is allowed, including errors.

By the way, part of the spilled juice that has fallen on the upper surface of the main body portion 32 of the burner head 3 flows through the notch groove 61 along the second axis C from the radially outer end toward the radially inner end, and reaches the eaves portion. 7 flows out radially inside the body portion 32 from the projecting end of the upper surface 71 of 7 . When the flow rate of the boiled-over juice is slow due to a small amount of the boiled-over juice or a high viscosity, the spilled boiled-over juice flows along the lower surface 72 of the eaves portion 7 and flows through the flame port 51 of the peripheral wall portion 322 (12). turn towards At this time, the spilled juice flows in the direction opposite to the direction in which the spilled juice flows along the second axis C from the radially outer end to the radially inner end. Therefore, if the first axis c of the flame hole passage 5 coincides with or is substantially parallel to the second axis C of the cutout groove 61 in a plan view, the spilled juice that has flowed around the flame hole 51 It will enter the inside of the burner hole passage 5 from the upper end.

However, in the stove burner 1 of the above-described embodiment, the second axis C of the notch groove 61 is aligned with the first axes c ₁ and c ₂ of the burner passages 5a and 5b located below the notch groove 61 in plan view. Since they are substantially perpendicular to each other, the spilled juice that wraps around as described above is the direction in which the upper surface 71 of the eaves 7 protrudes in the direction in which the spilled juice wraps around the two rims that extend in the height direction of the flame ports 51a and 51b. It is cut off by the inner wall portion of the flame hole passages 5a and 5b located near one of the rims farther from the tip or near the rim, and drips. Therefore, even if the boiling juice flows along the lower surface 72 of the eaves 7 toward the flame ports 51a and 51b, the infiltration of the boiling juice can be limited to the vicinity of the flame ports 51a and 51b. It is possible to more effectively prevent spilled juice from entering the inside of 5b. In addition, the spilled juice that has entered the vicinity of the flame ports 51a and 51b can be blown away from the flame ports 51a and 51b by the air-fuel mixture that is subsequently ejected from the flame ports 51a and 51b. Clogging of 51b is less likely to occur.

In addition, since the upper surface 71 of the eaves portion 7 is a tapered surface that slopes downward in the overhanging direction, the spilled juice can be cut at the tip of the overhanging direction of the upper surface 71 of the eaves portion 7 and flow down. It becomes difficult for the underside of the eaves portion 7 to occur. Therefore, it is possible to further prevent spilled juice from entering the burner passages 5a and 5b.

Furthermore, 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 opposite direction of the air-fuel mixture ejection direction, Even if the portion runs 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 drips away from the lower ends of the flame ports 51a and 51b, 51a and 51b can be prevented. Therefore, it is possible to further prevent spilled juice from entering the burner passage 5 .

Although the present invention has been described with respect to one embodiment, the present invention is not limited to the above embodiment. For example, in the above-described 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. In the above embodiment, the burner hole passages 5 positioned below the notch groove 61 are two burner hole passages 5a and 5b. Depending on the circumferential interval of the burner passages 5, the inclination angle α, the number of notch grooves 61, the inclination angle β, etc., there may be one or more than three.

Furthermore, 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 casting. In this case, an annular wall is erected on the inner peripheral end of the bottom wall portion 21, a groove is formed in the annular wall to form the flame hole passage 5, and the burner head 3 is provided so as to be seated on the upper surface of the annular wall. may The burner head 3 in this case can be an annular or plate-like lid or the like. And, while the above embodiments are for internal flame burners, the present invention is equally applicable to external flame burners. In this case, the bank portion 6 is erected on the outer peripheral end portion of the upper surface of the upper wall portion 11, and the burner head 3 may be called a burner cap.

DESCRIPTION OF SYMBOLS 1... Burner for stove, 11... Upper wall part, 12... Surrounding wall part, 121... Flare surface, 23... Air-fuel mixture chamber, 5, 5a, 5b... Flare passage, 51, 51a, 51b... Flame vent, 6... bank 61 notch groove 7 overhang 71 top surface of overhang 7 c first axis of burner passage 5 c ₁ , c ₂ first axis of burner passages 5 a and 5 b , C... the second axis of the notch groove 6;

Claims (3)

An air-fuel mixture chamber to which air-fuel mixture is supplied, an upper wall portion covering the air-fuel mixture chamber from above, and an annular peripheral wall portion positioned below the upper wall portion, and the peripheral wall portion includes the peripheral wall portion. A stove burner in which a plurality of flame hole passages through which an air-fuel mixture is jetted are established at intervals in the circumferential direction, and the first axis, which is the central axis line of each flame hole passage, is inclined to one side in the circumferential direction with respect to the radial direction. and
The downstream end of the flame hole passage is used as the flame hole, and the surface of the peripheral wall where the flame hole opens is used as the flame hole surface, and the spilled juice that has fallen on the upper surface of the upper wall part flows down to the flame hole surface. An annular embankment is erected to prevent the in which an eaves projecting radially over the entire circumference is provided on either one of the peripheral surfaces of the upper wall located at
The second axis, which is the central axis of the notched groove, is inclined in the other circumferential direction with respect to the radial direction, and the second axis is substantially aligned with the first axis of the burner passage located below the notched groove in plan view. A burner for a stove, characterized in that it is orthogonal to 2. The stove burner according to claim 1, wherein the upper surface of said eaves portion is a tapered surface that slopes downward in the projecting direction. 3. The stove burner according to claim 1, wherein the flame port surface of the peripheral wall portion is inclined downward in the height range of the flame port in a direction opposite to the jetting direction of the air-fuel mixture.

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