Concentric burner and gas cooking stove

Abstract

Provided is a concentric burner which is formed of a slave burner and a master burner surrounding the slave burner and in which a slave burner inflow pipe 45 and a slave burner nozzle 46 facing an opening 451 at the upstream end of the slave burner inflow pipe are arranged on a cooking stove top plate 2, and the tip of the slave burner nozzle 46 is positioned below the master burner and further inward in the radial direction than the outer periphery of the master burner when viewed from above, said concentric burner making it possible to suppress the fuel gas injected from the slave burner nozzle 46 from being blown from the side by an air flow generated between the top plate 2 and the master burner.　A pair of wind shielding walls 47, 47 are provided that cover the gap between the tip of the slave burner nozzle 46 and the opening 451 at the upstream end of the slave burner inflow pipe 45 from both sides in the horizontal direction orthogonal to the direction in which the tip of the slave burner nozzle 46 and the upstream end of the slave burner inflow pipe 45 face each other.

Description

Parent and child burners and gas stoves

[0001] The present invention relates to a parent-child burner provided on a gas stove and a gas stove equipped with this parent-child burner.

[0002] A known parent-child burner of this type is described in Patent Document 1. In this burner, the child burner comprises a child burner body exposed on the top plate of the gas stove, a child burner cap with multiple child burner flame holes formed therein for spraying the mixture in the child burner distribution chamber and placed on the child burner body so as to define a child burner distribution chamber between the child burner body and the child burner cap, and a child burner inlet pipe extending horizontally from the child burner body on the top plate of the gas stove, and a child burner nozzle provided facing the opening at the upstream end of the child burner inlet pipe, and a mixture of fuel gas sprayed from a nozzle hole at the tip of the child burner nozzle provided facing the opening at the upstream end of the child burner inlet pipe and primary air sucked in from the opening at the upstream end of the child burner inlet pipe is supplied to the child burner distribution chamber via the child burner inlet pipe. The parent burner also comprises an annular parent burner body that surrounds the child burner body and is exposed on the top plate of the gas stove; an annular parent burner cap that is placed on the parent burner body so as to define a parent burner distribution chamber between the parent burner body and the parent burner cap, and that has multiple parent burner flame holes formed therein that spray the mixture in the parent burner distribution chamber; and a parent burner inlet pipe that extends from the parent burner body below the top plate of the gas stove, so that a mixture of fuel gas sprayed from the nozzle hole at the tip of the parent burner nozzle that is provided facing the opening at the upstream end of the parent burner inlet pipe and primary air sucked in from the opening at the upstream end of the parent burner inlet pipe is supplied to the parent burner distribution chamber via the parent burner inlet pipe.

[0003] In a typical parent-child burner system, the child burner inlet pipe extends below the stove top, just like the parent burner inlet pipe. However, if the door of the cabinet with the gas stove built in on top is quickly opened when the parent-child burner is at its lowest heat (when only the child burner is burning at low heat), negative pressure will build up inside the cabinet, and this negative pressure will act on the opening at the upstream end of the child burner inlet pipe. This can cause the child burner flame to be drawn into the child burner distribution chamber, resulting in a fire going out.

[0004] In contrast, in the device described in Patent Document 1, the slave burner inlet pipe is located on the top plate of the gas stove, so even if negative pressure occurs inside the cabinet, this negative pressure does not act on the opening at the upstream end of the slave burner inlet pipe, and misfires of the slave burner do not occur. However, when the slave burner inlet pipe is located on the top plate of the gas stove, the slave burner nozzle is also located on the top plate of the gas stove. Furthermore, since it would be unsightly if the slave burner nozzle were to be noticeable when viewed from above, in the device described in Patent Document 1, the tip of the slave burner nozzle is located below the main burner body and radially inward from the outer periphery of the main burner body when viewed from above.

[0005] However, it was discovered that locating the tip of the sub-burner nozzle in this position causes the following problem: Between the top plate of the gas stove and the main burner, a relatively strong air current (air flow) is generated during combustion of the sub-burner, drawn by the updraft generated by the combustion toward the sub-burner. As a result, the fuel gas sprayed from the nozzle hole of the sub-burner nozzle is blown horizontally and laterally by the air current generated between the top plate and the main burner, perpendicular to the opposing direction between the tip of the sub-burner nozzle and the upstream end of the sub-burner inlet pipe, making the combustion of the sub-burner unstable.

[0006] CN212691761U

[0007] In view of the above, the present invention aims to provide a parent-child burner and a gas stove equipped with this parent-child burner that can stabilize combustion of the child burner by preventing the fuel gas sprayed from the nozzle hole of the child burner nozzle from being fanned by the air current generated between the top plate and the parent burner.

[0008] In order to solve the above problems, the first invention of the present application is a parent-child burner to be installed in a gas stove, which is composed of a child burner and a parent burner surrounding the child burner, the child burner comprising a child burner body exposed on the top plate of the gas stove, a child burner cap with multiple child burner flame holes formed therein for spraying the mixture in the child burner distribution chamber, which is placed on the child burner body so as to define a child burner distribution chamber between the child burner body and the child burner body, and a child burner inlet pipe extending horizontally from the child burner body on the top plate of the gas stove, and a mixture of fuel gas sprayed from the nozzle hole at the tip of the child burner nozzle provided facing the parent burner and primary air sucked in from the opening at the upstream end of the child burner inlet pipe is supplied to the child burner distribution chamber via the child burner inlet pipe, and the parent burner comprises an annular parent burner body exposed on the top plate of the gas stove and surrounding the child burner body, and a child burner cap with multiple child burner flame holes formed therein for spraying the mixture in the child burner distribution chamber, which is placed on the parent burner body so as to define a child burner distribution chamber between the child burner body and the child burner body, the parent burner cap is placed so as to define a parent burner distribution chamber between the parent burner body and the parent burner inlet pipe, and the parent burner cap is formed with a plurality of parent burner flame holes for spraying out the mixture in the parent burner distribution chamber; and the parent burner inlet pipe extends from the parent burner body below the top plate of the gas stove, and a mixture of fuel gas sprayed out from the nozzle hole at the tip of the parent burner nozzle provided facing the opening at the upstream end of the parent burner inlet pipe and primary air sucked in from the opening at the upstream end of the parent burner inlet pipe is supplied to the parent burner distribution chamber via the parent burner inlet pipe, and the tip of the child burner nozzle is located below the parent burner body and radially inward from the outer periphery of the parent burner body when viewed from above, and a pair of wind shielding walls are provided to cover the gap between the tip of the child burner nozzle and the opening at the upstream end of the child burner inlet pipe from both horizontal sides perpendicular to the opposing direction of the tip of the child burner nozzle and the upstream end of the child burner inlet pipe. A second invention of the present application is a gas stove, characterized by comprising the parent-child burner of the first invention.

[0009] According to this invention (first invention), the windshield can prevent the fuel gas injected from the nozzle holes of the sub-burner nozzles from being blown horizontally sideways by the airflow generated between the top plate and the main burner, perpendicular to the opposing direction between the tip of the sub-burner nozzle and the upstream end of the sub-burner inlet pipe, thereby stabilizing combustion of the sub-burners.

[0010] In the present invention, it is also desirable to provide an upper wall portion spanning the upper ends of the pair of wind shielding walls, which prevents the airflow from flowing around from the upper ends of the wind shielding walls into the gap between the tip of the sub-burner nozzle and the upstream end of the sub-burner inlet pipe, thereby improving the effect of suppressing the fanning of the fuel gas.

[0011] In the present invention, it is also desirable that a pair of wind shielding walls extend from the upstream end of the sub-burner inlet pipe. This allows the wind shielding walls to be integrally molded with the burner inlet pipe, thereby avoiding an increase in the number of parts due to the provision of the wind shielding walls. Furthermore, this is advantageous in that it prevents a gap from occurring between the wind shielding walls and the upstream end of the burner inlet pipe due to an assembly error, which would impair the effect of suppressing the fanning of the fuel gas.

[0012] In addition, in the present invention, it is desirable that a skirt portion extending downward is extended from the outer periphery of the parent burner body, and that the height of the lower end of the skirt portion is lower than the upper end of the wind shielding wall. In this way, the height of the airflow passing under the skirt portion and flowing between the top plate and the parent burner is lower than the upper end of the wind shielding wall. This ensures that the airflow hits the wind shielding wall, improving the effect of suppressing the fanning of the fuel gas.

[0013] Furthermore, in the gas stove of the second invention, when the parent and child burners have the skirt portion, it is desirable that a raised portion that rises above the lower end of the skirt portion is provided at a portion located radially inward of the skirt portion when viewed from above the top plate of the gas stove, and the tip of the child burner nozzle is located radially inward of the contour of the raised portion when viewed from above. In this way, the airflow passing under the skirt portion and flowing between the top plate and the parent burner hits the step in the contour of the raised portion that is higher than the lower end of the skirt portion. This weakens the force of the airflow, further improving the effect of suppressing fanning of the fuel gas.

[0014] 1 is a perspective view of a main part of a gas stove equipped with a parent-child burner according to an embodiment of the present invention. It is a cross-sectional side view taken along line II-II in FIG. 1. It is a cross-sectional plan view taken along line III-III in FIG. 2. It is a cross-sectional view taken along line IV-IV in FIG. 2. It is a perspective view of an exploded state of the parent-child burner according to the embodiment. It is an enlarged perspective view of a child burner inlet pipe of the parent-child burner according to the embodiment, seen from the opposite direction to FIG. 5.

[0015] 1 and 2 show a gas stove equipped with a dual burner A according to an embodiment of the present invention. The gas stove has a top plate 2 that covers the top surface of a stove body 1. The top plate 2 is composed of a main body 21 and a cover plate 22 that prevents overflowing liquid from seeping in through a burner opening 21a that is opened in the main body 21 and overlooks the dual burner A. A trivet 3 with multiple trivet claws 31 is placed on the top plate 2, surrounding the burner opening 21a.

[0016] The parent-child burner A is composed of a child burner 4 and a parent burner 5 surrounding the child burner 4. The heating power can be changed widely from the minimum heating power that burns only the child burner 4 at low heat to the maximum heating power that burns both the child burner 4 and the parent burner 5 at high heat. The child burner 4 is equipped with a thermocouple 6 for detecting the flame of the child burner 4, and the parent burner 5 is equipped with an ignition electrode 7 for igniting the parent burner 5.

[0017] The sub burner 4 comprises a sub burner body 41 exposed on the top plate 2 of the gas stove, and a sub burner cap 42 placed on the sub burner body 41. Referring also to Figure 5, the sub burner body 41 has an outer cylinder 411 and an inner cylinder 412 formed as separate members. The sub burner cap 42 has an outer cylinder portion 421 seated on the upper end of the outer cylinder 411 of the sub burner body 41, and an inner cylinder portion 422 fitted into the inner cylinder 412 of the sub burner body 41. An annular sub burner distribution chamber 43 is defined between the sub burner body 41 and the sub burner cap 42. The outer cylinder portion 421 of the sub burner cap 42 has multiple sub burner flame holes 44 formed therein for ejecting the air-fuel mixture from the sub burner distribution chamber 43.

[0018] The sub burner 4 further includes a sub burner inlet pipe 45 extending horizontally from the sub burner body 41 on the top plate 2 of the gas stove. A sub burner nozzle 46 is provided on the top plate 2, facing an opening 451 at the upstream end of the sub burner inlet pipe 45. The sub burner nozzle 46 is attached to a nozzle holder 461, which is fixed to a mounting base 11 fixed to the stove body 1 and exposed above the top plate 2 through the cover plate 22. Fuel gas is supplied to the sub burner nozzle 46 via a sub burner gas pipe 462 and the nozzle holder 461. A mixture of fuel gas ejected from a nozzle hole 46a at the tip of the sub burner nozzle 46 and primary air sucked in through the opening 451 at the upstream end of the sub burner inlet pipe 45 is supplied to the sub burner distribution chamber 43 via the sub burner inlet pipe 45.

[0019] The parent burner 5 includes an annular parent burner body 51 that surrounds the child burner body 41 exposed on the top plate 2 of the gas stove, and an annular parent burner cap 52 that is placed on the parent burner body 51. Referring also to FIG. 5 , the parent burner body 51 has an outer cylindrical portion 512 and an inner cylindrical portion 513 that extend from the outer and inner peripheries of an annular bottom wall portion 511. The parent burner cap 52 has an outer cylindrical portion 521 that seats on the upper end of the outer cylindrical portion 512 of the parent burner body 51, and an inner cylindrical portion 522 that fits around the inner cylindrical portion 513 of the parent burner body 51. An annular parent burner distribution chamber 53 is defined between the parent burner body 51 and the parent burner cap 52. The outer cylindrical portion 521 of the parent burner cap 52 has a plurality of parent burner flame holes 54 through which the air-fuel mixture in the parent burner distribution chamber 53 is ejected. In addition, a slit-shaped flame transfer hole 54 a extending in the radial direction is formed on the upper surface of the main burner cap 52 for flame transfer between the sub burner 4 and the main burner 5 .

[0020] The parent burner 5 further includes a parent burner inlet pipe 55 extending from the parent burner body 51 below the top plate 2 of the gas stove. A mixture of fuel gas ejected from a nozzle hole at the tip of a parent burner nozzle (not shown) provided facing the opening at the upstream end of the parent burner inlet pipe 55 and primary air sucked from the opening at the upstream end of the parent burner inlet pipe 55 is supplied to the parent burner distribution chamber 53 via the parent burner inlet pipe 55. The parent burner inlet pipe 55 is composed of a downstream pipe 551 that fits into a port portion 53a that communicates with the parent burner distribution chamber 53 and is provided on the underside of the bottom wall portion 511 of the parent burner body 51 at one circumferential position, and extends below the top plate 2, and an upstream pipe 552 that is connected to the lower end of the downstream pipe 551 via a connecting pipe portion 552a and extends horizontally below the top plate 2. A venturi portion 552b is formed near the upstream end of the upstream pipe 552. When fuel gas is injected from the nozzle hole of the parent burner nozzle, negative pressure is generated in the venturi portion 552b, which causes primary air to be sucked in from the upstream end of the upstream pipe 552, i.e., from the opening at the upstream end of the parent burner inlet pipe 55.

[0021] However, when the sub burner nozzle 46 is arranged on the top plate 2 of the gas stove as in this embodiment, it would be unsightly if the sub burner nozzle 46 were to stand out when viewed from above. Therefore, the tip of the sub burner nozzle 46 is positioned below the main burner body 51 and radially inward from the outer periphery of the main burner body 51 when viewed from above.

[0022] The sub burner body 41 also has an extension 413 that extends downward below the sub burner distribution chamber 43. Referring also to Figure 3, an internal gap 414 that communicates with the sub burner distribution chamber 43 is provided within a predetermined circumferential range of the extension 413. The circumferential central portion of the internal gap 414 is formed as a narrow portion 4141 whose radial width is narrower than the radial width of the other portions of the internal gap 414, while the other portions of the internal gap 414, i.e., the circumferential side portions, are formed as wide portions 4142 whose radial width is wider. The downstream end of the sub burner inlet pipe 45 communicates with the narrow portion 4141 of the internal gap 414, and the sub burner inlet pipe 45 is arranged so as to extend radially outward along a radial line passing through the circumferential center of this narrow portion 4141. The mixture of fuel gas and primary air injected from the nozzle hole 46a of the sub-burner nozzle 46 flows from the narrow portion 4141 to the wide portion 4142 of the internal gap 414 through the sub-burner inlet pipe 45, thereby achieving the effect of sucking in primary air from the opening 451 at the upstream end of the sub-burner inlet pipe 45 (an effect similar to the so-called radial venturi effect).

[0023] A seal portion 412a is formed in the extension 413 of the inner cylinder 412 of the sub burner body 41, located outside the internal gap 414, and contacts the inner circumferential surface of the extension 413 of the outer cylinder 411 of the sub burner body 41. The portions of the inner and outer wall surfaces 414a and 414b of the internal gap 414 that coincide with the narrow portion 4141 form a plane perpendicular to a radial line passing through the circumferential center of the narrow portion 4141 of the internal gap 414. An opening 452 at the downstream end of the sub burner inlet pipe 45 is formed in the portion of the outer wall surface 414b of the internal gap 414 that coincides with the narrow portion 4141. An internal flow passage 453 connecting the upstream opening 451 and the downstream opening 452 of the sub burner inlet pipe 45 tapers downstream. It should be noted that the child burner inlet pipe 45 may have a venturi portion near the upstream end, similar to the parent burner inlet pipe 55 .

[0024] Meanwhile, between the top plate 2 of the gas stove and the main burner 5, during combustion of the sub burners 4, a relatively strong air current (air flow) is generated, attracted by the updraft generated by the combustion and directed toward the sub burners 4. Therefore, the fuel gas sprayed from the nozzle hole 46a of the sub burner nozzle 46 is blown by the air current generated between the top plate 2 and the main burner 5 from the horizontal side, perpendicular to the opposing direction between the tip of the sub burner nozzle 46 and the upstream end of the sub burner inlet pipe 45, which may cause the combustion of the sub burners 4 to become unstable.

[0025] 3 and 6 , a pair of wind shielding walls 47 are provided to cover the gap between the tip of the sub burner nozzle 46 and the opening 451 at the upstream end of the sub burner inlet pipe 45 from both sides in the horizontal direction perpendicular to the opposing direction of the tip of the sub burner nozzle 46 and the upstream end of the sub burner inlet pipe 45. Furthermore, an upper wall portion 471 is provided to span the upper ends of the wind shielding walls 47. Both wind shielding walls 47 and the upper wall portion 471 extend from the upstream end of the sub burner inlet pipe 45. The wind shielding walls 47 are also provided so that the gap between them gradually widens toward the nozzle holder 461, allowing primary air to be smoothly drawn in through the opening 451 at the upstream end of the sub burner inlet pipe 45.

[0026] According to the above configuration, the windshield wall 47 can prevent the fuel gas injected from the nozzle holes 46a of the slave burner nozzles 46 from being blown sideways (more precisely, from the horizontal side perpendicular to the opposing direction between the tip of the slave burner nozzle 46 and the upstream end of the slave burner inlet pipe 45) by the airflow generated between the top plate 2 and the master burner 5, stabilizing combustion of the slave burners 4. Furthermore, the upper wall portion 471 can prevent the airflow from flowing around from the upper end of the windshield wall 47 into the gap between the tip of the slave burner nozzle 46 and the upstream end of the slave burner inlet pipe 45, improving the effect of suppressing the blowing of the fuel gas.

[0027] It is also possible to provide the wind shield wall 47 as a separate, independent component from the sub-burner inlet pipe 45. However, this would increase the number of parts required by providing the wind shield wall 47, resulting in increased costs. Furthermore, assembly errors could result in a gap between the wind shield wall 47 and the upstream end of the sub-burner inlet pipe 45, impairing the effect of suppressing the fanning of the fuel gas injected from the nozzle hole 46a of the sub-burner nozzle 46. In contrast, if the wind shield wall 47 extends from the upstream end of the sub-burner inlet pipe 45, as in this embodiment, the wind shield wall 47 is integrally formed with the sub-burner inlet pipe 45. This is advantageous because it avoids an increase in the number of parts required by providing the wind shield wall 47 and does not impair the effect of suppressing the fanning of the fuel gas due to assembly errors.

[0028] A skirt portion 514 extends downward from the outer periphery of the parent burner body 51. The height of the lower end of the skirt portion 514 is set lower than the upper end of the wind shielding wall 47, as shown in Fig. 4. This makes the height of the airflow that passes under the skirt portion 514 and flows between the top plate 2 and the parent burner 5 lower than the upper end of the wind shielding wall 47. This ensures that the airflow hits the wind shielding wall 47, improving the effect of suppressing the fanning of the fuel gas.

[0029] Furthermore, as shown in Fig. 4, a portion of the cover plate 22 located radially inward of the skirt portion 514 when viewed from above the gas stove top plate 2 is provided with a raised portion 221 that rises above the lower end of the skirt portion 514. As shown in Fig. 3, the tip of the sub-burner nozzle 46 is positioned radially inward of the contour of the raised portion 221 when viewed from above. This allows the airflow flowing between the top plate 2 and the main burner 5, passing under the skirt portion 514, to hit a step 221a in the contour of the raised portion 221, which is higher than the lower end of the skirt portion 514. This weakens the force of the airflow, further improving the suppression of fuel gas fanning.

[0030] The upper wall portion 471 is located below the bottom wall portion 511 of the main burner body 51, and if overflowing liquid falls along the underside of the bottom wall portion 511 onto the upper wall portion 471, some of the overflowing liquid may find its way around the underside of the upper wall portion 471 and into the nozzle hole 46a at the tip of the sub burner nozzle 46, potentially causing clogging of the nozzle hole 46a. Therefore, a visor portion 515 is provided on the inner periphery of the circumferential portion of the bottom wall portion 511 of the main burner body 51 that coincides with the sub burner nozzle 46, extending radially inward to cover the sub burner inlet pipe 45 from above. As shown in Figures 3 and 5, hanging walls 515a, 515a are provided on both side edges of the visor portion 515 and extending downward outside the sub burner inlet pipe 45. This prevents overflowing liquid from falling between the parent burner body 51 and the child burner body 41 from running down the underside of the bottom wall portion 511 of the parent burner body 51 and onto the upper wall portion 471, which helps prevent clogging of the nozzle hole 46a of the child burner nozzle 46.

[0031] 5, the outer cylinder 411 of the sub burner body 41 is integrally molded with a base plate 416 that is integrated with the bottom wall of the sub burner inlet pipe 45 and that projects outward from a circumferential location that matches the sub burner inlet pipe 45 at the bottom of the portion that becomes the extension 413, and from the opposite location. A nozzle holder 461 that mounts the sub burner nozzle 46 and the end of the base plate 416 on the nozzle holder 461 side are fixed to a common mounting base 11, thereby ensuring concentricity between the sub burner nozzle 46 and the sub burner inlet pipe 45. In addition, the portion of the base plate 416 that projects outward from the opposite circumferential location that matches the sub burner inlet pipe 46 is provided with a short cylinder 416a into which the downstream pipe 551 of the main burner inlet pipe 55 fits.

[0032] Although the embodiments of the present invention have been described above with reference to the drawings, the present invention is not limited thereto. For example, in the above embodiment, the sub-burner inlet pipe 45 is integrally molded with the outer tube 411 of the sub-burner body 41, but a sub-burner inlet pipe 45 separate from the outer tube 411 may be connected to the outer tube 411. Also, in the above embodiment, the top plate 2 of the gas stove is composed of the top plate main body 21 and the cover plate 22, but the top plate main body 21 and the cover plate 22 may also be integrated.

[0033] A...parent and child burners, 2...top plate, 221...raised portion, 4...child burner, 41...child burner body, 42...child burner cap, 43...child burner distribution chamber, 44...child burner flame hole, 45...child burner inlet pipe, 451...opening at upstream end, 46...child burner nozzle, 46a...nozzle hole, 461...nozzle holder, 47...wind shield wall, 471...upper wall portion, 5...parent burner, 51...parent burner body, 514...skirt portion, 52...parent burner cap, 53...parent burner distribution chamber, 54...parent burner flame hole, 55...parent burner inlet pipe.

Claims

1. A parent-child burner for use in a gas stove, comprising a child burner and a parent burner surrounding the child burner, the child burner comprising a child burner body exposed on the top plate of the gas stove, a child burner cap with multiple child burner flame holes formed therein for spraying the mixture in the child burner distribution chamber, which is placed on the child burner body so as to define a child burner distribution chamber between the child burner body and the child burner cap, and a child burner inlet pipe extending horizontally from the child burner body on the top plate of the gas stove, such that a mixture of fuel gas sprayed from the nozzle hole at the tip of the child burner nozzle provided facing the opening at the upstream end of the child burner inlet pipe and primary air sucked in from the opening at the upstream end of the child burner inlet pipe is supplied to the child burner distribution chamber via the child burner inlet pipe, The parent burner comprises an annular parent burner body surrounding a child burner body exposed on the top plate of the gas stove, an annular parent burner cap with a plurality of parent burner flame holes formed therein for ejecting the mixture in the parent burner distribution chamber, which is placed on the parent burner body so as to define a parent burner distribution chamber between the parent burner body and the parent burner cap, and a parent burner inlet pipe extending from the parent burner body below the top plate of the gas stove, so that a mixture of fuel gas ejected from a nozzle hole at the tip of a parent burner nozzle provided facing the opening at the upstream end of the parent burner inlet pipe and primary air sucked in from the opening at the upstream end of the parent burner inlet pipe is supplied to the parent burner distribution chamber via the parent burner inlet pipe, and the tip of the child burner nozzle is located below the parent burner body and radially inward from the outer periphery of the parent burner body when viewed from above, A parent-child burner characterized in that a pair of wind shielding walls are provided to cover the gap between the tip of the child burner nozzle and the opening at the upstream end of the child burner inlet pipe from both horizontal sides perpendicular to the opposing direction between the tip of the child burner nozzle and the upstream end of the child burner inlet pipe.

2. A parent-child burner according to claim 1, further comprising an upper wall portion extending between the upper ends of said pair of wind shielding walls.

3. A parent-child burner according to claim 1, characterized in that the pair of wind shielding walls extend from the upstream end of the child burner inlet pipe.

4. A parent-child burner as described in any one of claims 1 to 3, characterized in that a skirt portion extending downwardly extends from the outer periphery of the parent burner body, and the height of the lower end of the skirt portion is lower than the upper end of the wind shield wall.

5. A gas stove comprising a parent-child burner according to any one of claims 1 to 3.

6. A gas stove equipped with a parent and child burner as described in claim 4, characterized in that a raised portion that rises above the lower end of the skirt portion is provided in a portion located radially inward from the skirt portion when viewed from above the top plate of the gas stove, and the tip of the child burner nozzle is located radially inward from the contour of the raised portion when viewed from above.

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