JP2023073167A - Cooking stove burner and heating cooker mounted with the same - Google Patents

Abstract

To inhibit interference between flames of first flame holes at the lower side and second flame holes at the upper side which are open on an outer peripheral surface of a flame hole formation member which can be divided vertically to stabilize combustion.SOLUTION: In a first formation member 21 at the lower side of a flame hole formation member 20, multiple first radial grooves 21e are provided in a recessed form and arranged in a circumferential direction at an upper end of a first annular wall 21d erected upward from an outer edge portion and each first protruding part 21s protruding upward is formed between the adjacent first grooves. On the other hand, in a second formation member 22 at the upper side, multiple second radial grooves 22b are provided in a recessed form and arranged in the circumferential direction at a lower end of a second annular wall 22a hanging downward from the outer edge portion, and each second protruding part 22s protruding downward is formed between the adjacent second grooves. The first formation member and the second formation member are placed offset from each other in the circumferential direction so that the first grooves and the second grooves do not overlap with each other to form each first flame hole 20Ua by the first groove and a lower end of the second protruding part and form each second flame hole 20Ub by the second groove and an upper end of the first protruding part. At that time, the upper end of the first protruding part is located above the lower end of the second protruding part.SELECTED DRAWING: Figure 6

Description

The present invention provides a stove burner in which a lower first flame port and an upper second flame port are alternately opened in the circumferential direction on the outer peripheral surface of a flame port forming member that can be divided into upper and lower parts, and the stove burner is mounted. It is related with a heating cooker.

A stove burner, in which a plurality of flame ports are open on the outer peripheral surface of a flame port forming member and ejects a mixed gas of fuel gas and air from the flame ports for combustion, is mounted on a heating cooker such as a gas stove. and widely used. In such stove burners, it has been proposed to configure the flame port forming member so that it can be divided into upper and lower parts in order to improve workability of the flame port forming member (for example, Patent Document 1).

The first forming member below the flame port forming member has a first annular wall that is annularly erected upward from the outer edge portion, and a first radial groove is formed in the upper end of the first annular wall. A plurality of first grooves are recessed at predetermined intervals in the direction, and upwardly convex first protrusions are formed between adjacent first grooves. On the other hand, the second forming member on the upper side of the flame port forming member has a second ring-shaped wall extending downward from the outer edge portion, and a second radial groove is formed in the lower end of the second ring-shaped wall. A plurality of recesses are provided at predetermined intervals in the circumferential direction, and the space between the adjacent second grooves is a second protrusion that protrudes downward. By displacing the second forming member in the circumferential direction so that the first groove and the second groove do not overlap and placing the second forming member on the first forming member, the first groove and the lower end of the second protrusion are formed. The first flame port opens to the outer peripheral surface of the first annular wall, and the second flame port formed by the second groove and the upper end of the first protrusion opens to the outer peripheral surface of the second annular wall. . Therefore, the first flame ports and the second flame ports are alternately arranged in the circumferential direction on the outer peripheral surface of the flame port forming member.

JP 2019-143959 A

However, in the conventional stove burner in which the flame port forming member is configured to be vertically divisible as described above, the first annular wall is placed in a state where the upper second forming member is placed on the lower first forming member. The first flame port opened on the outer peripheral surface of the second annular wall and the second flame port opened on the outer peripheral surface of the second annular wall are close to each other in the vertical direction, and the mutual flames interfere with each other, resulting in unstable combustion. There was a problem.

The present invention has been made in response to the above-described problems in the prior art, and a flame port forming member which can be divided into upper and lower portions has a first flame port on the outer peripheral surface and a second flame port on the upper side. It is an object of the present invention to provide a technology capable of stabilizing combustion by suppressing interference between flames of a first flame port and a second flame port in a stove burner that is alternately opened in the circumferential direction.

In order to solve the above problems, the stove burner of the present invention employs the following configuration. i.e.
A stove burner in which a plurality of flame ports are opened on the outer peripheral surface of a flame port forming member that can be divided into upper and lower parts, and a mixed gas of fuel gas and air is ejected from the flame ports for combustion,
The first forming member below the flame port forming member has a first annular wall that is annularly erected upward from the outer edge portion, and a first radial groove in the upper end of the first annular wall. are provided in a plurality of recesses at predetermined intervals in the circumferential direction, and the first protrusions are upwardly convex between the adjacent first grooves,
A second forming member above the flame port forming member has a second annular wall extending downward from an outer edge portion in an annular shape, and a second radial groove is formed in the lower end of the second annular wall. A plurality of recesses are provided at predetermined intervals in the circumferential direction, and the space between the adjacent second grooves is a second protrusion that protrudes downward,
The second forming member is mounted on the first forming member while being displaced in the circumferential direction so that the first groove of the first annular wall and the second groove of the second annular wall do not overlap. Thus, as the plurality of flame ports, a first flame port formed by the first groove and the lower end of the second protrusion opens to the outer peripheral surface of the first annular wall, and the second groove and the A second flame port formed by the upper end of the first protrusion opens to the outer peripheral surface of the second annular wall,
The upper end of the first protrusion is located above the lower end of the second protrusion when the second forming member is placed on the first forming member.

In such a stove burner of the present invention, the upper end side of the first projection and the lower end side of the second projection overlap in the vertical direction, so that the upper end of the first flame port and the lower end of the second flame port A vertical interval (distance) can be secured between the Therefore, compared to the case where the upper end of the first protrusion and the lower end of the second protrusion are aligned (located on the same plane), the flame of the first flame port and the flame of the second flame port are It is possible to suppress interference and stabilize combustion.

The stove burner of the present invention described above may be configured as follows. First, the outer peripheral surface of the flame port forming member has a flame port region in which the first flame ports and the second flame ports are alternately opened in the circumferential direction, and the gap between the first flame ports and the second flame ports is equal to or greater than a predetermined distance. It is divided into a non-flame hole area that is not open throughout. Then, a first condition in which the upper end of the first protrusion in the burner port region is positioned above the upper end of the first annular wall in the non-burner region, and the lower end of the second protrusion in the burner port region are: At least one of the second condition that the non-flame port region is located below the lower end of the second annular wall is satisfied.

In this way, the upper end of the first convex portion is inserted into the second groove in the non-flame port region while the upper end of the first annular wall and the lower end of the second annular wall are brought into contact with each other in the non-flame port region. or by inserting the lower end of the second protrusion into the first groove. A space in the vertical direction can be secured between the upper end of the first flame port and the lower end of the second flame port.

Further, the stove burner of the present invention described above may be configured as follows. First, the width of the first protrusion in the circumferential direction of the flame port forming member is wider than the width of the second groove, and the width of the second protrusion is wider than the width of the first groove. A first chamfer is provided between both circumferential side surfaces and an upper end surface of the first protrusion, and a second chamfer is provided between both circumferential side surfaces and a lower end surface of the second protrusion. It is When the second forming member is placed on the first forming member, the first chamfered portion of the first convex portion and the second chamfered portion of the second convex portion are in contact with each other.

With this configuration, the upper end side of the first protrusion and the lower end side of the second protrusion overlap each other in the vertical direction, and the portion of contact between the first chamfered portion and the second chamfered portion allows the first chamfered portion to be aligned. Since the flame port and the second flame port can be reliably separated, it is possible to avoid the connection between the flame of the first flame port and the flame of the second flame port, thereby ensuring stable combustion. .

Further, in the above-described stove burner of the present invention, the first chamfered portion and the second chamfered portion may be curved surfaces in which arcs having centers of curvature along the radial direction of the first annular wall and the second annular wall are continuous.

Since the so-called R-chamfering process is applied to the first chamfered portion and the second chamfered portion in this manner, the abutting portions of the first chamfered portion and the second chamfered portion are in line contact. For this reason, for example, even if the flaming port forming member is splashed with the spilled juice from a cooking vessel placed above the stove burner, the first forming member and the second forming member are caused by the burning of the spilled juice. can be suppressed as compared with the case of surface contact.

In such a stove burner of the present invention, either one of the first forming member and the second forming member has a blocking wall that radially inwardly covers the seam between the first annular wall and the second annular wall in the non-flame port region. may be provided.

With this configuration, if the first chamfered portion of the first convex portion and the second chamfered portion of the second convex portion in the flame port region come into contact first, the first annular wall in the non-flame port region and the Even if a gap is formed at the joint with the second annular wall, the inside of the gap is covered with the blocking wall, so the outflow of the mixed gas from the gap can be suppressed.

Such a stove burner of the present invention may be configured as follows. First, a plurality of radial third grooves are recessed in the circumferential direction at the lower end of the third annular wall which is annularly provided downward from the outer edge portion of the first forming member. The burner body has an annular mounting surface on which the third annular wall of the first forming member is mounted. By mounting the first forming member on the burner body, the third groove and the mounting surface are formed. The third flame port formed by is opened on the outer peripheral surface of the third annular wall. Then, the mixed gas is supplied to the third flame port and not supplied to the first flame port and the second flame port, and the mixed gas is added to the third flame port to the first flame port and the second flame port. It is possible to switch between the state of supplying

Thus, even in the type of stove burner having the third flame port to which the mixed gas is supplied independently of the first flame port and the second flame port (so-called parent-child burner), the application of the present invention enables the first flame to Combustion can be stabilized by suppressing interference between the flame of the mouth and the flame of the second flame mouth.

Also, by mounting the stove burner of the present invention on a cooking device, a cooking vessel placed above the stove burner may be heated.

In such a heating cooker, it is possible to stabilize combustion by suppressing mutual flame interference of the first flame port and the second flame port which are opened on the outer peripheral surface of the flame port forming member of the stove burner mounted. can. As a result, it becomes possible to ensure stable cooking performance as a cooking device.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view showing the appearance of a gas stove 1 as an example of a cooking device equipped with a stove burner 10 of this embodiment. 1 is a perspective view showing a rough shape of a stove burner 10 of this embodiment. FIG. It is a perspective view which shows the state which decomposed|disassembled the upper part of the stove burner 10 of a present Example. Fig. 2 is a vertical sectional view showing the internal structure of the stove burner 10 of this embodiment. It is explanatory drawing which expanded and showed the outer peripheral surface of the burner cap 20 in the stove burner 10 of a conventional example. It is explanatory drawing which expanded and showed the outer peripheral surface of the burner cap 20 in the stove burner 10 of a present Example. FIG. 2 is an enlarged vertical cross-sectional view showing the internal structure of the burner cap 20 of the present embodiment in the non-flame port region. FIG. 10 is an explanatory diagram showing an example in which one of a first chamfered portion 21t and a second chamfered portion 22t is R-chamfered and the other is C-chamfered; FIG. 11 is an explanatory diagram showing an example in which the width of a first protrusion 21s is narrower than the width of a second groove 22b, and the width of the second protrusion 22s is narrower than the width of a first groove 21e;

FIG. 1 is a perspective view showing the appearance of a gas stove 1 as an example of a cooking device equipped with a stove burner 10 of this embodiment. The illustrated gas stove 1 includes a shallow box-shaped stove body 2 with an open top, and a top plate 3 placed on the stove body 2 to cover the top of the stove body 2 . Two stove burners 10 for burning fuel gas are installed on the left and right sides of the stove main body 2 , and upper portions of the stove burners 10 protrude from insertion holes formed in the top plate 3 .

A trivet 4 for placing a cooking container such as a pot is installed above the stove burner 10 on the top plate 3. - 特許庁As shown in the figure, the trivet 4 has a plurality of (six in this embodiment) claw portions 4b radially supported by an annular frame portion 4a placed on the top plate 3 surrounding the stove burner 10. , and a cooking container is placed on the upper surface of these claw portions 4b. Further, on the front side of the top plate 3, operation knobs 5 are provided corresponding to each of the two stove burners 10 and operated by the user when igniting, extinguishing, or adjusting the heat power. When the operation knob 5 is pushed down and rotated in a predetermined direction (counterclockwise in this embodiment) from the initial position, fuel gas is supplied to the stove burner 10 and is ignited by an ignition plug, which will be described later. After that, when the rotation angle of the operation knob 5 is changed, the amount of fuel gas supplied is changed, and the heating power of the stove burner 10 can be adjusted. The supply of fuel gas is stopped and the fire is extinguished.

FIG. 2 is a perspective view showing the rough shape of the stove burner 10 of this embodiment. As illustrated, the stove burner 10 has a structure in which a substantially cylindrical burner cap 20 is mounted on a substantially cylindrical burner body 11 . Two large and small mixing pipes (a large mixing pipe 12 and a small mixing pipe 13) are connected to the burner body 11. The burner body 11 and the two mixing pipes 12 and 13 of this embodiment are made of stainless steel or the like. It is formed by sheet metal processing using a thin plate. A mixed gas of fuel gas and primary air is supplied to the burner body 11 through mixing tubes 12 and 13 as will be described later.

On the other hand, the burner cap 20 of this embodiment is formed by die casting using an aluminum alloy, brass, or the like. On the outer peripheral surface of the burner cap 20 mounted on the burner body 11, as shown in an enlarged view in FIG. Among these, the plurality of upper flame ports 20U on the upper stage are further divided into upper and lower parts, and a first upper flame port 20Ua on the lower side and a second upper flame port 20Ub on the upper side are formed around the outer peripheral surface of the burner cap 20. alternate in one direction. The burner cap 20 of this embodiment corresponds to the "flame port forming member" of the present invention.

The gas pipe 40 that guides the fuel gas to the stove burner 10 is provided with a main valve 41 that opens and closes the gas pipe 40, and the gas pipe 40 is branched into two on the downstream side of the main valve 41, Flow control valves 42a and 42b for controlling the flow rate of the fuel gas are provided in the branch pipes 40a and 40b, respectively. The main valve 41 is electrically connected to a control section (not shown), and is controlled to open and close by the control section. On the other hand, the flow control valves 42a and 42b are connected to the operation knob 5 on the top plate 3 via a shaft (not shown), and can change the flow rate of the fuel gas according to the rotation of the operation knob 5.

When the fuel gas is injected from a nozzle (not shown) connected to the end of the branch pipe 40a toward the opening end 12o of the large mixing pipe 12, it flows into the large mixing pipe 12 while sucking in primary air, and the large mixing pipe 12 is discharged. The passing fuel gas and primary air are mixed and the mixed gas is supplied to the burner body 11 . Similarly, when fuel gas is injected from a nozzle (not shown) connected to the end of the branch pipe 40b toward the open end 13o of the small mixing tube 13, the fuel gas and primary air pass through the small mixing tube 13. The mixed gas is mixed and supplied to the burner body 11 .

Although details will be described later, the stove burner 10 of the present embodiment is a so-called parent-child burner, and a plurality of upper flame ports 20U (first upper flame port 20Ua and second upper flame port 20Ub) are connected from the large mixing pipe 12. While the mixed gas is supplied, the mixed gas is supplied from the small mixing pipes 13 to the plurality of lower stage flame ports 20L on the lower stage side. As shown in the figure, a spark plug 30 is installed close to the outer peripheral surface of the burner body 11, and an eaves portion 31 protruding from the outer peripheral surface of the burner cap 20 covers the spark plug 30 from above. . By spark discharge from the ignition plug 30 toward the burner cap 20, combustion of the mixed gas ejected from the lower flame port 20L is started. A flame sensor 32 consisting of a thermocouple is installed at a position adjacent to the ignition plug 30 to detect the flame at the lower flame port 20L. This flame sensor 32 is electrically connected to the aforementioned control unit.

In the stove burner 10 of the present embodiment, the mixed gas is supplied to the lower flame port 20L and not supplied to the upper flame port 20U, and the mixed gas is supplied to the lower flame port 20L and also to the upper flame port 20U. It is possible to switch between the above-mentioned state and the above-described state by means of the flow control valves 42a and 42b. In addition, the lower flame port 20L has a smaller opening area than the upper flame port 20U, and the amount of the mixed gas ejected is reduced. Therefore, if the heating power required by the stove burner 10 is small, the mixed gas is burned only in the lower flame port 20L. It is possible to burn the mixed gas. At that time, due to the spread of flame from the flame of the lower flame port 20L, the mixed gas ejected from the upper flame port 20U starts to burn. As shown in the figure, the upper flame port 20U does not open at a position of the outer peripheral surface of the burner cap 20 that faces the plurality of claws 4b of the trivet 4, and the flame of the upper flame port 20U It is designed to avoid the nail portion 4b from being scorched.

FIG. 3 is a perspective view showing an exploded state of the upper part of the stove burner 10 of this embodiment. As illustrated, the substantially cylindrical burner body 11 has an upper end bent inward and has an annular mounting surface 11a on which the burner cap 20 is mounted. The upper part of the burner body 11 protrudes from the insertion hole of the top plate 3 when the stove burner 10 is installed on the stove main body 2 . A substantially cylindrical central cylinder 14 is erected inside the burner body 11, and between the burner body 11 and the central cylinder 14 is an annular mixing chamber 16 into which a mixed gas is supplied. formed.

Further, a substantially cylindrical partition cylinder 15 is provided between the burner body 11 and the central cylinder 14 . As a result, the mixing chamber 16 is divided into an inner mixing chamber 16a inside the partition cylinder 15 (that is, between the partition cylinder 15 and the central cylinder 14) and a part outside the partition cylinder 15 (that is, between the middle cylinder 14). It is divided into an outer mixing chamber 16b between the burner body 11 and the partition cylinder 15). Of these, the inner mixing chamber 16a is supplied with the mixed gas through the large mixing pipe 12 described above, and the outer mixing chamber 16b is supplied with the mixed gas through the small mixing pipe 13 described above. The partition cylinder 15 is formed by sheet metal processing in the same manner as the burner body 11, has an upper end bent inward and an inner side bent downward, and has a short cylindrical fitting surface 15a.

The burner cap 20 of this embodiment is configured to be splittable into two upper and lower parts in order to improve workability. The cap member 22 is placed on the first cap member 21 . As shown in the figure, a cylindrical partition tube 21a extends downward from the inner edge of the annular first cap member 21 . A shallow annular lower annular wall 21b extends downward from the outer edge portion of the first cap member 21, and a radial lower groove 21c is formed at the lower end of the lower annular wall 21b in the circumferential direction. are recessed in parallel with each other. When placing the first cap member 21 on the burner body 11, the partition tube 21a is fitted inside the fitting surface 15a of the partition tube 15, and the lower end of the lower annular wall 21b of the first cap member 21 is fitted. are brought into contact with the mounting surface 11 a of the burner body 11 . The first cap member 21 of this embodiment corresponds to the "first forming member" of the present invention, and the second cap member 22 of this embodiment corresponds to the "second forming member" of the present invention. are doing. The lower annular wall 21b of the present embodiment corresponds to the "third annular wall" of the present invention, and the lower groove 21c of the present embodiment corresponds to the "third groove" of the present invention.

Further, the first cap member 21 has a first annular wall 21d that is annularly erected upward from the outer edge portion, and a first radial groove 21e is provided at the upper end of the first annular wall 21d. are recessed at predetermined intervals in the circumferential direction. The first groove 21e is not provided at a position of the first annular wall 21d facing the plurality of claw portions 4b of the trivet 4. As shown in FIG.

On the other hand, the circular second cap member 22 has a second annular wall 22a annularly extending downward from the outer edge portion, and a second radial direction at the lower end of the second annular wall 22a. A plurality of grooves 22b are recessed at predetermined intervals in the circumferential direction. Further, the above-described canopy portion 31 that covers the upper side of the spark plug 30 protrudes from the outer peripheral surface of the second annular wall 22a. As with the first grooves 21e described above, the second grooves 22b are also not provided in the second annular wall 22a at positions facing the plurality of claw portions 4b of the trivet 4. As shown in FIG. In the burner cap 20 of this embodiment, when the second cap member 22 is placed on the first cap member 21, the first groove 21e and the second groove 22b are shifted in the circumferential direction so as not to overlap each other. In this state, the upper end of the first annular wall 21d and the lower end of the second annular wall 22a are aligned.

FIG. 4 is a longitudinal sectional view showing the internal structure of the stove burner 10 of this embodiment. As described above, the mixing chamber 16 is provided between the burner body 11 and the central cylinder 14 inside the burner body 11, and is divided by the partition cylinder 15 into the inner mixing chamber 16a and the outer mixing chamber 16b. When the first cap member 21 is placed on the burner body 11, the partition tube 21a is fitted inside the fitting surface 15a of the partition tube 15, and the lower annular wall 21b of the first cap member 21 is fitted. The lower end is in contact with the mounting surface 11a, and the lower flame port 20L formed by the lower groove 21c and the mounting surface 11a opens to the outer peripheral surface of the lower annular wall 21b. In FIG. 4, the left cross section of the first cap member 21 represents a cross section cut at the position of the lower groove 21c (lower flame port 20L), and the right cross section represents a cross section cut at a position without the lower groove 21c. represents. The lower flame port 20L of this embodiment corresponds to the "third flame port" of the present invention.

The lower flame port 20L communicates with the outer mixing chamber 16b, and the mixed gas supplied through the small mixing tube 13 described above is ejected from the lower flame port 20L, and the spark discharge of the spark plug 30 burns the mixed gas. is started. The flame sensor 32 of this embodiment is arranged so as to be able to detect the flame of the lower flame port 20L.

As shown in FIG. 4, a cylindrical fitting tube 22d is vertically provided from the lower surface of the second cap member 22, and the second cap member 22 is placed on the first cap member 21. , the fitting tube 22d is fitted inside the upper part of the central tube 14. As shown in FIG. The lower end side of the central cylindrical body 14 is airtightly joined to the periphery of the through hole 17h formed in the bottom plate 17 made of sheet metal.

In addition, the second cap member 22 is displaced from the first cap member 21 in the circumferential direction so that the first groove 21e of the first annular wall 21d and the second groove 22b of the second annular wall 22a do not overlap. A first upper flame port 20Ua formed by the first groove 21e and the lower end of the second annular wall 22a opens to the outer peripheral surface of the first annular wall 21d, and the second groove 22b and the second A second upper stage flame port 20Ub formed by the upper end of the first annular wall 21d opens to the outer peripheral surface of the second annular wall 22a. In FIG. 4, the right cross section of the first cap member 21 and the second cap member 22 represents a cross section cut at the position of the first groove 21e (the first upper flame port 20Ua), and the left cross section represents the first cap member. A cross section cut at the position of the second groove 22b (the second upper flame port 20Ub) is shown. The first upper flame port 20Ua of the present embodiment corresponds to the "first flame port" of the present invention, and the second upper flame port 20Ub of the present embodiment corresponds to the "second flame port" of the present invention. is equivalent to

The first upper flame port 20Ua and the second upper flame port 20Ub communicate with the inner mixing chamber 16a, and the mixed gas supplied through the large mixing pipe 12 described above is supplied to the first upper flame port 20Ua and the second upper flame port 20Ua. Combustion of the mixed gas is started by jetting out from the flame port 20Ub and spreading from the flame of the lower stage flame port 20L. As described above, on the outer peripheral surface of the burner cap 20, the first upper flame port 20Ua and the second upper flame port 20Ub are alternately arranged in the circumferential direction.

In the stove burner 10 in which the upper flame port 20U is thus divided into upper and lower parts, combustion is unstable due to interference between the flame of the lower first upper flame port 20Ua and the flame of the upper second upper flame port 20Ub. Sometimes it becomes Therefore, in the stove burner 10 of the present embodiment, mutual flame interference is suppressed by securing a vertical space between the upper end of the first upper stage flame port 20Ua and the lower end of the second upper stage flame port 20Ub. combustion is stabilized. This point will be described below, but for comparison, the conventional stove burner 10 in which combustion may become unstable due to mutual flame interference between the first upper stage flame port 20Ua and the second upper stage flame port 20Ub is described first. to explain.

FIG. 5 is an explanatory view showing an enlarged outer peripheral surface of the burner cap 20 in the conventional stove burner 10. As shown in FIG. In the drawing, the outer peripheral surfaces of the first annular wall 21d of the first cap member 21 and the second annular wall 22a of the second cap member 22 are hatched. As shown in the figure, the space between the adjacent first grooves 21e of the first annular wall 21d is a first convex portion 21s that protrudes upward, and the space between the adjacent second grooves 22b of the second annular wall 22a is It is a downwardly convex second convex portion 22s. In addition, the width of the first protrusion 21s in the circumferential direction (horizontal direction in the drawing) of the burner cap 20 is wider than the width of the second groove 22b, and the width of the second protrusion 22s is wider than the width of the first groove 21e. It is widened, and a circumferential overlap margin is provided between the first convex portion 21s and the second convex portion 22s.

A first upper flame port 20Ua is formed by the first groove 21e and the lower end of the second convex portion 22s, and a second upper flame port 20Ub is formed by the second groove 22b and the upper end of the first convex portion 21s. there is It should be noted that the first upper flame port 20Ua and the second upper flame port 20Ub are not opened at positions facing the plurality of claw portions 4b of the trivet 4 on the outer peripheral surface of the burner cap 20, and the following description is given. A region in which neither the first upper flame port 20Ua nor the second upper flame port 20Ub is open for a predetermined interval or longer is referred to as a “non-flame port region”. 20Ub alternately opening in the circumferential direction is referred to as a "flame hole region".

In the conventional stove burner 10, the upper end of the first convex portion 21s in the flame port region and the upper end of the first annular wall 21d in the non-flame port region are the same height, and the height of the second protrusion in the flame port region is the same. The height of the lower end of the portion 22s and the lower end of the second annular wall 22a in the non-flame port region are the same, and when the second cap member 22 is placed on the first cap member 21, the first convex portion 21s and the upper end of the second protrusion 22s are located on the same plane. Therefore, the upper end of the first upper flame port 20Ua (the lower end of the second convex portion 22s) and the lower end of the second upper flame port 20Ub (the upper end of the first convex portion 21s) are close to each other in the vertical direction. , along with the reduction in the diameter of the burner cap 20 and the increase in the number of the first upper flame port 20Ua and the second upper flame port 20Ub, the circumferential interval between the first upper flame port 20Ua and the second upper flame port 20Ub is increased. In a situation where it is difficult to secure, the flame of the first upper flame port 20Ua and the flame of the second upper flame port 20Ub are likely to interfere with each other, resulting in unstable combustion.

On the other hand, FIG. 6 is an explanatory view showing an enlarged outer peripheral surface of the burner cap 20 in the stove burner 10 of this embodiment. FIG. 6(a) shows a state in which the second cap member 22 is placed on the first cap member 21, and FIG. 6(b) shows the first cap member 21 and the second cap member 22. Separated state is shown. 5, the outer peripheral surfaces of the first annular wall 21d and the second annular wall 22a are hatched.

As shown in the figure, in the stove burner 10 of this embodiment, the upper end of the first projection 21s in the burner port region is located above the upper end of the first annular wall 21d in the non-burner port region. In addition, the lower end of the second protrusion 22s in the burner port region is located below the lower end of the second annular wall 22a in the non-burner region.

In addition, the width of the first protrusion 21s in the circumferential direction (horizontal direction in the drawing) of the burner cap 20 is wider than the width of the second groove 22b, and both side surfaces of the first protrusion 21s in the circumferential direction A first chamfered portion 21t is provided between and the upper end surface. Similarly, the width of the second protrusion 22s in the circumferential direction of the burner cap 20 is wider than the width of the first groove 21e, and the gap between both side surfaces and the lower end surface of the second protrusion 22s in the circumferential direction is large. A second chamfered portion 22t is provided. The first chamfered portion 21t and the second chamfered portion 22t of this embodiment are curved surfaces (so-called R-chamfering) in which circular arcs having a center of curvature along the radial direction of the burner cap 20 (the front-rear direction in the drawing) are continuous. ing.

Then, when the second cap member 22 is placed on the first cap member 21, as shown in FIG. , and in the flame port region, the first chamfered portion 21t of the first convex portion 21s and the second chamfered portion 22t of the second convex portion 22s are in contact. As a result, the upper ends of the first protrusions 21s enter the second grooves 22b and the lower ends of the second protrusions 22s enter the first grooves 21e. It is located above the bottom end.

In the stove burner 10 of this embodiment, the upper end side of the first convex portion 21s and the lower end side of the second convex portion 22s in the flame port region overlap each other in the vertical direction. A vertical gap G can be secured between the upper end of the second upper flame port 20Ub and the lower end of the second upper flame port 20Ub. Therefore, compared to the case where the upper end of the first convex portion 21s and the upper end of the second convex portion 22s are positioned on the same plane as in the above-described conventional example, the flame of the first upper flame port 20Ua and the second upper flame Combustion can be stabilized by suppressing interference with the flame of the port 20Ub.

In particular, in the stove burner 10 of the present embodiment, the upper end of the first convex portion 21s in the flame port region is located above the upper end of the first annular wall 21d in the non-flame port region. The lower end of the second protrusion 22s is located below the lower end of the second annular wall 22a in the non-flame port region. As a result, in the non-flame port region, the upper end of the first annular wall 21d and the lower end of the second annular wall 22a are brought into contact with each other, while in the flame port region, the upper end of the first protrusion 21s is inserted into the second groove 22b. At the same time, the lower end of the second projection 22s can be inserted into the first groove 21e, so that the vertical gap G is formed between the upper end of the first upper flame port 20Ua and the lower end of the second upper flame port 20Ub. can be secured.

Further, in the stove burner 10 of the present embodiment, the width of the first protrusion 21s in the circumferential direction of the burner cap 20 is wider than the width of the second groove 22b, and the width of the second protrusion 22s is the width of the first groove 21e. The first convex portion 21s is provided with the first chamfered portion 21t, and the second convex portion 22s is provided with the second chamfered portion 22t. In this way, while the first chamfered portion 21t and the second chamfered portion 22t are in contact with each other, the upper end of the first protrusion 21s is inserted into the second groove 22b, and the lower end of the second protrusion 22s is inserted into the second groove 22b. 1 groove 21e. In this way, the first upper flame port 20Ua and the second upper flame port 20Ub are reliably separated from each other by the contact point between the first chamfered portion 21t and the second chamfered portion 22t. It is possible to ensure stable combustion by avoiding connection with the flame of the second upper stage flame port 20Ub.

In the stove burner 10 of the present embodiment, so-called R-chamfering is applied to the first chamfered portion 21t and the second chamfered portion 22t. The contacts are line contacts. Therefore, for example, even if the burner cap 20 is splashed with boiled-over juice from a cooking container placed above the stove burner 10, the first cap member 21 and the second cap 21 and the second cap member 21 and the second cap member 21 and the second cap member 21 and the second cap member 21 and the second cap member 21 and the second cap 21 and the first cap member 21 and the second cap 21 and Adherence to the member 22 can be suppressed compared to the case of surface contact.

FIG. 7 is a longitudinal sectional view showing an enlarged internal structure of the burner cap 20 of this embodiment in the non-flame port region. As shown in the figure, a blocking wall 21g is erected upward radially inside the first annular wall 21d in the non-flame port region of the first cap member 21 . In the state where the second cap member 22 is placed on the first cap member 21, the blocking wall 21g is formed in the radial direction at the seam between the first annular wall 21d and the second annular wall 22a in the non-flame port region. It is designed to be covered from the inside.

In the stove burner 10 of the present embodiment, if the first chamfered portion 21t of the first convex portion 21s and the second chamfered portion 22t of the second convex portion 22s in the flame port region come into contact first, Even if a gap occurs at the joint between the first annular wall 21d and the second annular wall 22a in the non-flame-port area, the inside of the gap is covered with the blocking wall 21g, so the mixed gas flows out from the gap. can be suppressed.

Although the stove burner 10 of the present embodiment has been described above, the present invention is not limited to the above embodiment, and can be implemented in various forms without departing from the scope of the invention.

For example, in the above-described embodiment, both the first chamfered portion 21t of the first convex portion 21s and the second chamfered portion 22t of the second convex portion 22s are R-chamfered. However, the first chamfered portion 21t and the second chamfered portion 22t are not limited to the R chamfering process, and one of them may be the so-called C chamfering process. FIG. 8 is an explanatory view showing an example in which one of the first chamfered portion 21t of the first convex portion 21s and the second chamfered portion 22t of the second convex portion 22s is R-chamfered and the other is C-chamfered. be. In the drawing, the outer peripheral surface of the burner cap 20 is shown enlarged, and the outer peripheral surfaces of the first annular wall 21d and the second annular wall 22a are hatched. Further, FIG. 8(a) shows a state in which the second cap member 22 is placed on the first cap member 21, and FIG. 8(b) shows the first cap member 21 to the second cap member. 22 are shown separated.

In the illustrated example, the first chamfered portion 21t of the first convex portion 21s is R-chamfered in the same manner as in the above-described embodiment, whereas the second chamfered portion of the second convex portion 22s is chamfered. 22t is chamfered to form a plane inclined at an angle of 45 degrees with respect to the lower end surface of the second projection 22s. Then, when the second cap member 22 is placed on the first cap member 21, as shown in FIG. It abuts on the plane of the chamfered second chamfered portion 22t. Of course, on the contrary, the second chamfered portion 22t may be R-chamfered and the first chamfered portion 21t may be C-chamfered.

In such a stove burner 10 as well, the upper ends of the first protrusions 21s are inserted into the second grooves 22b, and the lower ends of the second protrusions 22s are inserted into the first grooves 21e, as in the above-described embodiment. , while ensuring a vertical gap G between the upper end of the first upper stage flame port 20Ua and the lower end of the second upper stage flame port 20Ub, the abutting position between the first chamfered portion 21t and the second chamfered portion 22t, It is possible to separate the first upper flame port 20Ua and the second upper flame port 20Ub.

Both the first chamfered portion 21t of the first convex portion 21s and the second chamfered portion 22t of the second convex portion 22s may be chamfered. In that case, the abutting portion between the first chamfered portion 21t and the second chamfered portion 22t is surface contact. On the other hand, if at least one of the first chamfered portion 21t and the second chamfered portion 22t is subjected to the R-chamfering process, the abutting portion between the first chamfered portion 21t and the second chamfered portion 22t becomes line contact, which results in overcooking. Sticking between the first cap member 21 and the second cap member 22 due to sticking of soup can be suppressed as compared with surface contact.

In the above-described embodiment, the width of the first projection 21s in the circumferential direction of the burner cap 20 is wider than the width of the second groove 22b, and the width of the second projection 22s is wider than the width of the first groove 21e. was becoming However, as shown in FIG. 9, the width of the first protrusion 21s in the circumferential direction of the burner cap 20 is narrower than the width of the second groove 22b, and the width of the second protrusion 22s is the first width. It may be narrower than the width of the groove 21e. In FIG. 9, the outer peripheral surface of the burner cap 20 is shown enlarged, and the outer peripheral surfaces of the first annular wall 21d and the second annular wall 22a are hatched.

In the illustrated example, the upper end of the first convex portion 21s in the burner port region is located above the upper end of the first annular wall 21d in the non-burner port region, and the circumferential direction of the burner cap 20 ( The width of the first protrusion 21s in the lateral direction) is slightly narrower than the width of the second groove 22b. In addition, the lower end of the second protrusion 22s in the burner port region is positioned below the lower end of the second annular wall 22a in the non-burner port region, and the second protrusion 22s in the circumferential direction of the burner cap 20 The width is slightly narrower than the width of the first groove 21e. When the second cap member 22 is placed on the first cap member 21, the upper end of the first ring-shaped wall 21d and the lower end of the second ring-shaped wall 22a are in contact with each other in the non-flame port region. , the upper end of the first protrusion 21s enters the second groove 22b, and the lower end of the second protrusion 22s enters the first groove 21e. will be located above.

In such a stove burner 10, even if the first chamfered portion 21t of the first convex portion 21s and the second chamfered portion 22t of the second convex portion 22s are not provided, the upper end side of the first convex portion 21s in the flame port region and the lower end side of the second protrusion 22s, thereby ensuring a vertical gap G between the upper end of the first upper flame port 20Ua and the lower end of the second upper flame port 20Ub. can be done. However, the second convex portion 22s is not placed on the first convex portion 21s, and a gap is generated in the circumferential direction (horizontal direction in the figure) between the first convex portion 21s and the second convex portion 22s. Therefore, it is necessary to strictly control the tolerance of the width of the first groove 21e and the width of the first protrusion 21s, and the tolerance of the width of the second groove 22b and the width of the second protrusion 22s. On the other hand, if the first chamfered portion 21t and the second chamfered portion 22t are brought into contact with each other as in the above-described embodiment, the first upper stage flame port 20Ua and the second upper stage flame port 20Ub can be distinguished depending on the contact portion. can be divided.

Further, in the above-described embodiment, the first condition that the upper end of the first convex portion 21s in the burner port region is located above the upper end of the first annular wall 21d in the non-burner region, and the Both the second condition that the lower end of the second convex portion 22s is located below the lower end of the second annular wall 22a in the non-flame port region were satisfied. However, even if both the first condition and the second condition are not satisfied, only one of them may be satisfied. For example, if only the first condition is satisfied, while the upper end of the first annular wall 21d and the lower end of the second annular wall 22a are brought into contact with each other in the non-flame port region, the upper end of the first convex portion 21s in the flame port region can enter the second groove 22b, it is possible to secure a vertical gap G between the upper end of the first upper flame port 20Ua and the lower end of the second upper flame port 20Ub. If both the first condition and the second condition are satisfied as in the above-described embodiment, a larger gap G can be ensured than if only one of them is satisfied.

Further, in the above-described embodiment, the blocking wall 21g that covers the joint between the first annular wall 21d and the second annular wall 22a in the non-flame port region of the burner cap 20 from the inside in the radial direction rises from the first cap member 21. was set. However, the shielding wall 21g is not limited to the first cap member 21, and the second annular wall 22a in the non-flame port region of the second cap member 22 is shielded downward from the inner side in the radial direction. A wall 21g may be provided vertically.

In the above-described embodiment, the mixed gas is supplied to the upper flame port 20U (the first upper flame port 20Ua and the second upper flame port 20Ub) through the large mixing pipe 12, and mixed to the lower flame port 20L through the small mixing pipe 13. The gas-supply type stove burner 10 (so-called parent-child burner) has been described as an example. However, the application of the present invention is not limited to parent and child burners, and may be applied to a type (so-called single burner) that does not have the small mixing tube 13 and the lower flame port 20L.

Furthermore, in the above-described embodiment, the stove burner 10 of the type that does not have a temperature sensor for detecting the temperature of the cooking vessel placed above the stove burner 10 has been described as an example. However, the invention can also be applied to a type of stove burner 10 that has a temperature sensor. In this case, the insertion hole is inserted inside the fitting cylinder 22d of the second cap member 22 (see FIG. 4), and the upper part of the temperature sensor erected inside the central cylinder 14 is inserted through the insertion hole. The temperature sensor may detect the temperature of the cooking container by contacting the lower surface of the cooking container with the upper end of the temperature sensor urged upward by the urging spring.

1... gas stove, 2... stove main body, 3... top plate,
4... trivet, 4a... frame part, 4b... claw part,
5 Operation Knob 10 Stove Burner 11 Burner Body
11a... Mounting surface, 12... Large mixing tube, 13... Small mixing tube,
14... Center cylinder, 15... Partition cylinder, 15a... Fitting surface,
16... Mixing chamber, 16a... Inner mixing chamber, 16b... Outer mixing chamber,
17... Bottom plate, 17h... Through hole, 20... Burner cap,
20L: lower flame port, 20U: upper flame port, 20Ua: first upper flame port,
20Ub... Second upper flame port, 21... First cap member, 21a... Partition tube,
21b...lower annular wall, 21c...lower groove, 21d...first annular wall,
21e... first groove, 21g... blocking wall, 21s... first protrusion,
21t... First chamfered portion, 22... Second cap member, 22a... Second annular wall,
22b... second groove, 22d... fitting tube, 22s... second protrusion,
22t... Second chamfered portion, 30... Spark plug, 31... Eaves portion,
32... Flame sensor, 40... Gas pipe, 40a... Branch pipe,
40b... branch pipe, 41... main valve, 42a... flow control valve,
42b... Flow control valve.

Claims (7)

A stove burner in which a plurality of flame ports are opened on the outer peripheral surface of a flame port forming member that can be divided into upper and lower parts, and a mixed gas of fuel gas and air is ejected from the flame ports for combustion,
The first forming member below the flame port forming member has a first annular wall that is annularly erected upward from the outer edge portion, and a first radial groove in the upper end of the first annular wall. are provided in a plurality of recesses at predetermined intervals in the circumferential direction, and the first protrusions are upwardly convex between the adjacent first grooves,
A second forming member above the flame port forming member has a second annular wall extending downward from an outer edge portion in an annular shape, and a second radial groove is formed in the lower end of the second annular wall. A plurality of recesses are provided at predetermined intervals in the circumferential direction, and the space between the adjacent second grooves is a second protrusion that protrudes downward,
The second forming member is mounted on the first forming member while being displaced in the circumferential direction so that the first groove of the first annular wall and the second groove of the second annular wall do not overlap. Thus, as the plurality of flame ports, a first flame port formed by the first groove and the lower end of the second protrusion opens to the outer peripheral surface of the first annular wall, and the second groove and the A second flame port formed by the upper end of the first protrusion opens to the outer peripheral surface of the second annular wall,
A stove burner, wherein an upper end of the first protrusion is located above a lower end of the second protrusion when the second forming member is placed on the first forming member. In the stove burner according to claim 1,
The outer peripheral surface of the flame port forming member has a flame port region in which the first flame ports and the second flame ports are alternately opened in the circumferential direction, and both the first flame ports and the second flame ports are predetermined. It is divided into a non-flame hole area that is not open over an interval of more than
A first condition in which the upper end of the first convex portion in the burner port region is positioned above the upper end of the first annular wall in the non-burner region; and the second convex portion in the burner port region. satisfying at least one of a second condition that the lower end of the second annular wall is located below the lower end of the second annular wall in the non-flame port region. In the stove burner according to claim 2,
The width of the first protrusion in the circumferential direction of the flame port forming member is wider than the width of the second groove, and the width of the second protrusion is wider than the width of the first groove. cage,
A first chamfered portion is provided between both circumferential side surfaces and an upper end surface of the first convex portion,
A second chamfered portion is provided between both circumferential side surfaces and a lower end surface of the second convex portion,
In a state where the second forming member is placed on the first forming member, the first chamfered portion of the first convex portion and the second chamfered portion of the second convex portion are in contact with each other. stove burner. In the stove burner according to claim 3,
A stove burner, wherein the first chamfered portion and the second chamfered portion are curved surfaces having a center of curvature along a radial direction of the first annular wall and the second annular wall and having continuous arcs. In the stove burner according to claim 3 or claim 4,
Either one of the first forming member and the second forming member is provided with a blocking wall that radially inwardly covers a seam between the first annular wall and the second annular wall in the non-flame port region. A stove burner characterized by: In the stove burner according to any one of claims 1 to 5,
The first forming member has a third annular wall annularly extending downward from the outer edge portion, and a plurality of radial third grooves are recessed in the circumferential direction at the lower end of the third annular wall. and
a burner body having an annular mounting surface on which the third annular wall of the first forming member is mounted;
By placing the first forming member on the burner body, a third flame port formed by the third groove and the placement surface opens to the outer peripheral surface of the third annular wall,
The mixed gas is supplied to the third flame port and not supplied to the first flame port and the second flame port, and the mixed gas is added to the third flame port and the first flame port and the first flame port are supplied. A stove burner characterized in that it can be switched between a state in which it is supplied also to the second flame port. A heating cooker equipped with the stove burner according to any one of claims 1 to 6 and heating a cooking container placed above the stove burner.

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