Gas burner for cooking stove and heating cooker

Abstract

To improve ignition performance of a gas burner for a cooking stove.SOLUTION: A gas burner 1 for a cooking stove includes: an annular burner cap 2 having a plurality of burner ports 3 at an outer peripheral part; and a burner body 4 having an upper surface 45 on which the burner cap 2 is placed. The plurality of burner ports 3 includes an ignition burner port 31, a pair of burner ports 32 located at both sides in a circumferential direction sandwiching the ignition burner port 31. At least one of the pair of burner ports 32 is configured to jet a mixed gas to an oblique lower side.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present disclosure relates to a gas burner for a stove and a cooking appliance equipped with the same. [Background technology]

[0002] The gas burner for a stove disclosed in Patent Document 1 includes an annular burner cap having a plurality of flame holes on its outer periphery, and these flame holes include an ignition flame hole.

[0003] In the above-mentioned gas burner for a stove, a spark is generated between the ignition target portion and the ignition plug, and the mixed gas ejected from the ignition flame hole is ignited by the spark. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2006-29723 A Summary of the Invention [Problem to be solved by the invention]

[0005] In the above-mentioned gas burner for a stove, when there is a wind, the mixed gas ejected from the ignition flame hole may be blown away, increasing the possibility of ignition failing.

[0006] The problem to be solved by the present disclosure is to improve the ignition performance of a gas burner for a stove. [Means for solving the problem]

[0007] A gas burner for a stove according to one embodiment of the present disclosure includes an annular burner cap having a plurality of flame holes on an outer periphery thereof, and a burner body having an upper surface on which the burner cap is placed. The plurality of flame holes include an ignition flame hole and a pair of flame holes located on both sides in the circumferential direction of the ignition flame hole. At least one of the pair of flame holes is a downward flame hole configured to eject a mixed gas obliquely downward.

[0008] A cooking appliance according to one aspect of the present disclosure includes the gas burner for a stove, and a cooking appliance body to which the gas burner for a stove is attached. Effect of the Invention

[0009] The present disclosure has an effect of improving the ignition performance of a gas burner for a stove. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is a plan view of a cooking device according to one embodiment. [Diagram 2] FIG. 2 is a plan view of a gas burner for a stove provided in the cooking appliance. [Diagram 3] FIG. 3 is a cross-sectional view taken along line AA in FIG. [Figure 4] FIG. 4 is a cross-sectional view taken along line BB in FIG. [Diagram 5] FIG. 5 is a front view of the gas burner for a stove. [Figure 6] FIG. 6 is a cross-sectional view taken along line CC in FIG. [Figure 7] FIG. 7 is a perspective view of a burner cap provided in the gas burner for a stove. [Figure 8] FIG. 8 is a bottom view of the burner cap. [Figure 9] FIG. 9 is a cross-sectional view taken along line DD in FIG. [Figure 10] FIG. 10 is a cross-sectional view taken along line EE in FIG. [Figure 11] FIG. 11 is a cross-sectional view taken along the line FF in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] 1. One embodiment Fig. 1 shows a cooking device 9 according to one embodiment. The cooking device 9 according to one embodiment is a gas stove, more specifically, a drop-in type gas stove that is installed on a kitchen counter (not shown). The directions used in the following text are based on the state in which the cooking device 9 is installed.

[0012] (heating cooker) A cooking device 9 of one embodiment includes a gas burner 1 for a stove (hereinafter simply referred to as "gas burner 1") and a cooking device main body 8 to which the gas burner 1 is attached.

[0013] Cooking device main body 8 has a casing 82 and a top plate 84. The box-shaped outer shell of cooking device main body 8 is composed of casing 82 and top plate 84. Casing 82 is a rectangular box-shaped casing with an opening that opens upward. Top plate 84 is installed on casing 82 so as to cover the opening of casing 82.

[0014] A plurality of holes 86 are formed vertically through the top plate 84, and a part of the corresponding gas burner 1 protrudes upward through each hole 86. In the cooking device 9 of one embodiment, two gas burners 1 are installed on the left and right, and another gas burner 1 is installed behind the left and right gas burners 1. The left and right gas burners 1 are high-power gas burners, and the rear gas burner 1 is a low-power gas burner.

[0015] The cooker body 8 further has a plurality of operating units 88. In the cooking device 9 of one embodiment, by operating at least one of the plurality of operating units 88, switching between ignition and extinguishing of the corresponding gas burner 1, or adjusting the flame power of the corresponding gas burner 1 is performed.

[0016] Furthermore, the cooking device 9 of one embodiment includes a plurality of trivets 89 installed on the upper surface of the cooking device body 8. The plurality of trivets 89 are three trivets 89 that correspond one-to-one to the three gas burners 1. Each trivet 89 is installed on the upper surface of the top plate 84 so as to be positioned surrounding a portion of the corresponding gas burner 1.

[0017] (Gas burner) The gas burner 1 shown in Figures 2 to 6 is one of three gas burners 1. The three gas burners 1 basically have a common configuration.

[0018] The gas burner 1 comprises an annular burner cap 2 having a plurality of flame holes 3 on its outer periphery, a burner body 4 on which the burner cap 2 is placed, a pot bottom temperature sensor 5, a gas mixing tube 6, and an ignition plug 7.

[0019] (Burner Cap) As shown in Fig. 7 etc., the burner cap 2 is a vertically penetrating annular member. The burner cap 2 is made of, for example, an aluminum alloy. The burner cap 2 has a vertically penetrating through hole 20 at its center and a plurality of flame holes 3 on its outer periphery.

[0020] The plurality of burner holes 3 are formed at intervals from one another in the circumferential direction of the burner cap 2. In this disclosure, when the term "circumferential direction" is used simply, it means the circumferential direction of the burner cap 2.

[0021] The burner cap 2 includes a cylindrical inner tube portion 21 having a through hole 20 at the center, a cylindrical outer tube portion 23 located radially outward from the inner tube portion 21, and a connecting portion 22 connecting upper portions of the inner tube portion 21 and the outer tube portion 23. In this disclosure, when the term "radial direction" is used simply, it means the radial direction of the burner cap 2.

[0022] The inner cylindrical portion 21 and the outer cylindrical portion 23 are positioned concentrically in a plan view. The plan view here means a view in a direction along the axis of the through hole 20 of the burner cap 2.

[0023] A lower portion of the inner cylinder portion 21 is located lower than the outer cylinder portion 23. An upper portion of the outer cylinder portion 23 is located higher than the inner cylinder portion 21. The outer cylinder portion 23 is formed to be thicker than the inner cylinder portion 21 in the radial direction.

[0024] The connecting portion 22 of the burner cap 2 is inclined as a whole so that the upper portion is located radially outward (see FIG. 3, etc.). The connecting portion 22 is formed so that the gradient gradually decreases toward the upper portion.

[0025] A cap cover 29 is fixed to the upper end of the burner cap 2. The outer diameter of the cap cover 29 is larger than the outer diameter of the burner cap 2.

[0026] (multiple flame holes) The plurality of burner holes 3 are formed in the outer cylindrical portion 23 of the burner cap 2. The plurality of burner holes 3 are arranged in the circumferential direction at intervals from one another.

[0027] 7 etc., each burner hole 3 has an upwardly recessed shape in the outer cylinder portion 23. Each burner hole 3 opens radially outward, radially inward, and downward.

[0028] In a state where the burner cap 2 is placed on the upper surface 45 of the burner body 4 (hereinafter, this is referred to as the "placed state of the burner cap 2"), the lower opening of each flame hole 3 is covered from below by the upper surface 45 of the burner body 4 (see FIG. 6). In the placed state of the burner cap 2, each flame hole 3 penetrates the outer cylinder portion 23 radially inward and outward.

[0029] In the gas burner 1 of one embodiment, the orientations of the plurality of burner holes 3 are inclined to the same circumferential side with respect to the radially outward direction (see FIG. 8).

[0030] Therefore, in the gas burner 1 of one embodiment, flames from the multiple burner holes 3 are ejected at an inclination toward the same circumferential side. This increases the contact area between the flames ejected from the gas burner 1 and a cooking vessel (not shown) such as a pot, improving the thermal efficiency and heat distribution during cooking. The angle of inclination is preferably set within a range of, for example, 20° to 27°.

[0031] The multiple flame holes 3 of the burner cap 2 include an ignition flame hole 31. Furthermore, the multiple flame holes 3 include a pair of flame holes 32 located on both the left and right sides of the ignition flame hole 31, and multiple other flame holes 33. The multiple other flame holes 33 are the multiple flame holes 3 provided in the burner cap 2 excluding the ignition flame hole 31 and the pair of flame holes 32.

[0032] (Ignition flame hole) In the gas burner 1 of one embodiment, two ignition flame holes 31 are provided in the burner cap 2. The two ignition flame holes 31 arranged in the circumferential direction are separated by a distance in the circumferential direction via a partition portion 231 (see FIG. 4, etc.) that constitutes a part of the circumferential direction of the outer cylinder portion 23.

[0033] The ignition flame hole 31 is the smallest flame hole among the multiple flame holes 3. The ignition flame hole 31 is formed smaller than a pair of flame holes 32 located on both sides thereof, and is also formed smaller than the multiple other flame holes 33.

[0034] The dimension of the ignition flame hole 31 recessed upward is smaller than the dimension of the pair of flame holes 32 recessed upward, and is also smaller than the dimension of the other flame holes 33 recessed upward.

[0035] When the burner cap 2 is placed, the upper end of the outlet constituting the downstream end opening of the ignition flame hole 31 is located lowest among the multiple flame holes 3 of the burner cap 2. In other words, the upper end of the outlet of the ignition flame hole 31 is located lower than the upper ends of the outlets constituting the downstream end openings of the pair of flame holes 32, and is also located lower than the upper ends of the outlets constituting the downstream end openings of the multiple other flame holes 33.

[0036] (Pair of flame holes) The pair of flame holes 32 are located on both sides in the circumferential direction sandwiching the two ignition flame holes 31. In other words, the two ignition flame holes 31 are located between the pair of flame holes 32 in the circumferential direction.

[0037] Between the pair of flame holes 32 and the two ignition flame holes 31 located between them, there are two partitions 232, 233 which form part of the circumferential direction of the outer cylinder portion 23. One of the pair of flame holes 32 is separated from the one of the two ignition flame holes 31 closest to it by the partition 232. The other of the pair of flame holes 32 is separated from the one of the two ignition flame holes 31 closest to it by the partition 233.

[0038] The pair of flame holes 32 are both configured to eject the mixed gas obliquely downward, and in this disclosure are referred to as "downward flame holes."

[0039] Specifically, each of the pair of burner holes 32 is formed with an inclined surface 325 for ejecting the mixed gas obliquely downward (see Figs. 6, 9, 10, etc.). The inclined surface 325 is a surface that constitutes at least a part of the upper end surface of the burner hole 32, and is inclined obliquely downward toward the outlet of the burner hole 32.

[0040] In the gas burner 1 of one embodiment, the inclined surface 325 is uniformly inclined toward the nozzle of the burner hole 32. Specifically, when an imaginary horizontal plane P1 is used as a reference, the inclined surface 325 of the burner hole 32 is inclined by a predetermined angle θ1 (see Figs. 9 and 10). The angle θ1 is not limited to that shown in the drawings, and it is also preferable to set it to, for example, about 60°, within a range of 70° to 50°, or within a range of 65° to 55°.

[0041] The upper ends of the outlets of the pair of flame holes 32 are positioned higher than the upper ends of the outlets of the two ignition flame holes 31 and lower than the upper ends of the outlets of the other flame holes 33 .

[0042] (several other flame holes) The multiple other flame holes 33 are formed at intervals from each other in the circumferential direction in the outer cylindrical portion 23 of the burner cap 2, except for the portion in which the two ignition flame holes 31 and the pair of flame holes 32 are provided.

[0043] Each of the other burner holes 33 has an inclined surface 335 for ejecting the mixed gas obliquely upward (see FIG. 11). The inclined surface 335 is a surface that is inclined obliquely upward toward the ejection port that constitutes the downstream end opening of the other burner hole 33.

[0044] In the gas burner 1 of one embodiment, the inclined surface 335 is uniformly inclined toward the outlet of the other burner hole 33. Specifically, when an imaginary horizontal plane P1 is used as a reference, the inclined surface 335 of the other burner hole 33 is inclined by a predetermined angle θ2. The angle θ2 is, for example, about 17°. Note that the angle θ2 at which the inclined surface 335 is inclined is not limited to this, and it is also preferable that the angle θ2 is set within a range of 20° to 15°, or within a range of 25° to 10°, for example.

[0045] (Ignition target part) In the gas burner 1 of one embodiment, a visor portion 25 protrudes radially outward from a circumferential portion of the burner cap 2, and an ignition target portion 26 protrudes downward from the visor portion 25 (see Figs. 4 and 7, etc.).

[0046] The eaves portion 25 includes an eaves portion main body 251 that protrudes radially outward from the upper end portion of the burner cap 2, and a peripheral wall 253 that hangs down from the peripheral edge portion of the eaves portion main body 251.

[0047] Ignition target portion 26 protrudes downward from the lower surface of flat plate-shaped eaves main body 251. A gap is provided between peripheral wall 253 and ignition target portion 26 located and surrounded by peripheral wall 253.

[0048] Ignition target portion 26 includes a main body portion 261 protruding downward from overhanging portion 25, and a tip portion 265 protruding further downward from a part of main body portion 261. Main body portion 261 is a block-shaped portion having a rectangular horizontal cross section.

[0049] The tip portion 265 is the lowermost portion of the ignition target portion 26, in other words, the lower end portion of the ignition target portion 26. The tip portion 265 is formed so that the horizontal cross section becomes smaller toward the tip side (i.e., toward the lower side).

[0050] In the gas burner 1 of one embodiment, the ignition target portion 26 includes two protruding portions 265. The two protruding portions 265 are positioned at a distance from each other in the circumferential direction. Each protruding portion 265 is positioned radially outward of the ignition flame hole 31 of the burner cap 2 and is positioned above the ignition flame hole 31.

[0051] The two protruding portions 265 have a one-to-one correspondence with the two ignition flame holes 31. Of the two protruding portions 265, the protruding portion 265 located on the first circumferential side is positioned opposite the ignition flame hole 31 located on the first circumferential side of the two ignition flame holes 31. Similarly, of the two protruding portions 265, the protruding portion 265 located on the second circumferential side is positioned opposite the ignition flame hole 31 located on the second circumferential side of the two ignition flame holes 31.

[0052] (Burner body) 3 and the like, the burner body 4 has a cylindrical outer shape. The burner body 4 includes an inner cover 41 and an outer cover 43, both of which are cylindrical, and a flow passage 42 is formed between the inner cover 41 and the outer cover 43. The flow passage 42 is connected to the gas mixing pipe 6 and is open upward.

[0053] The inner cover 41 and the outer cover 43 are joined to each other. A through hole 410 that penetrates vertically is formed on the inside of the inner cover 41. The outer cover 43 is positioned so as to surround the inner cover 41, which is shorter than the outer cover 43, over the entire periphery.

[0054] The upper end of the outer cover 43 is located higher than the upper end of the inner cover 41. The upper end of the outer cover 43 constitutes the upper end of the burner body 4, and the upper surface of the outer cover 43 constitutes the upper surface 45 of the burner body 4.

[0055] The upper surface 45 of the burner body 4 is formed in an annular shape over the entire circumference of the burner body 4. The upper surface 45 of the burner body 4 includes a mounting surface 452 on which the burner cap 2 is detachably mounted, and a guide surface 454 located radially outward of the mounting surface 452 (see FIG. 6). Both the mounting surface 452 and the guide surface 454 are formed over the entire circumference of the burner body 4.

[0056] The mounting surface 452 is an annular surface that constitutes the radially inner portion of the upper surface 45. The mounting surface 452 is inclined as a whole so that the radially outer portions are positioned higher.

[0057] The guide surface 454 is an annular surface constituting the radially outer portion of the upper surface 45. The guide surface 454 is configured to guide the flame transfer between the multiple flame holes 3 of the burner cap 2. The guide surface 454 is an annular flat surface and also an annular horizontal surface.

[0058] The placement surface 452 and the guide surface 454 are positioned continuously in the radial direction via the step portion 453. The step portion 453 is formed over the entire circumference of the burner body 4. The step portion 453 has an annular shape in a plan view.

[0059] 6, the surface of step portion 453 is inclined as a whole so that the radially outer portions are positioned lower. Guide surface 454 is positioned lower than the radially outer end of mounting surface 452.

[0060] When the burner cap 2 is placed, the inclined surfaces 325 of the pair of flame holes 32, each of which is a downward flame hole, are located directly above the placement surface 452 of the burner body 4. The pair of flame holes 32 are each formed so that the opening area becomes smaller toward the radially outer portion.

[0061] In addition, when an imaginary plane P5 (see FIG. 6) including the inclined surface 325 of the burner hole 32 is taken as a reference, the upper surface 45 of the burner body 4 is located below the plane P5 when the burner cap 2 is placed. The space where a spark is generated between the ignition plug 7 and the ignition target portion 26 is located above the plane P5.

[0062] (Pot bottom temperature sensor) 3 and other figures, the pot-bottom temperature sensor 5 is inserted into the through-hole 20 of the burner cap 2 so as to protrude above the burner cap 2. The pot-bottom temperature sensor 5 is configured to abut against the bottom surface of the cooking vessel heated by the gas burner 1 and detect the temperature. The surface 50 of the pot-bottom temperature sensor 5 that is configured to abut against the cooking vessel is located above the burner cap 2.

[0063] (Gas mixing tube) The gas mixing tube 6 shown in FIG. 2 is provided integrally with the outer cover 43 of the burner body 4 so as to protrude horizontally from the outer cover 43.

[0064] The gas mixing tube 6 has an internal flow passage 60 that communicates with the flow passage 42 of the burner body 4 , and an upstream end opening 61 that constitutes the upstream end of the internal flow passage 60 .

[0065] In the gas burner 1 of one embodiment, fuel gas is supplied to the gas mixing tube 6 through the gas nozzle 68 inserted into the upstream end opening 61, and ambient air is supplied to the gas mixing tube 6 as primary air through a gap between the upstream end opening 61 and the gas nozzle 68. The fuel gas and primary air supplied to the gas mixing tube 6 are mixed in the internal flow passage 60 of the gas mixing tube 6, and then supplied to the flow passage 42 of the burner body 4 as mixed gas.

[0066] (Spark plug) 5 and other drawings, the ignition plug 7 is installed so as to stand along the outer circumferential surface of the burner body 4. A discharge electrode 71 is provided at the tip of the ignition plug 7. The discharge electrode 71 is located opposite the ignition target portion 26 of the burner cap 2. The discharge electrode 71 is located radially outward of the ignition target portion 26 and below the ignition target portion 26.

[0067] The ignition plug 7 generates a spark between each of the two protruding tips 265 provided on the ignition target portion 26.

[0068] In the gas burner 1 of one embodiment, the discharge electrode 71 of the ignition plug 7 generates a spark between the two protruding portions 265 of the ignition target portion 26, and the mixed gas ejected from the two ignition flame holes 31 is ignited. Then, the flame spreads along the guide surface 454 of the burner body 4, and a combustion state is reached in which a flame ejects from each flame hole 3 of the burner cap 2.

[0069] (Action and effect) In one embodiment of the gas burner 1 having the above-mentioned configuration, when the burner cap 2 is placed, a portion of the upper surface 45 of the burner body 4 (specifically, the guide surface 454) is positioned radially outward beyond the multiple flame holes 3 of the burner cap 2.

[0070] In other words, when the burner cap 2 is placed, the guide surface 454 of the burner body 4 is located radially outward from the respective nozzles of the pair of flame holes 32 (i.e., the pair of downward flame holes). The dimension of the guide surface 454 protruding radially outward from the pair of flame holes 32 is preferably set within a range of, for example, 1.5 mm to 3.0 mm.

[0071] The guide surface 454 of the burner body 4 is located below each of the nozzles of the pair of flame holes 32. That is, the guide surface 454 of the burner body 4 is located obliquely below each of the nozzles of the pair of flame holes 32.

[0072] In the gas burner 1 of one embodiment, when the mixed gas is supplied to the flow passage 42 of the burner body 4 through the gas mixing tube 6, the mixed gas is sent to the multiple flame holes 3 of the burner cap 2 through the flow passage 42. The mixed gas that has flowed through the multiple flame holes 3 is ejected radially outward from the burner cap 2.

[0073] At this time, the mixed gas is ejected diagonally upward along the inclined surface 335 from the other multiple burner holes 33 included in the multiple burner holes 3, whereas the mixed gas is ejected diagonally downward along the inclined surface 325 from a pair of burner holes 32 included in the multiple burner holes 3 (see the white arrows in Figure 6).

[0074] The mixed gas ejected obliquely downward through the nozzles of a pair of burner holes 32 hits a portion of the guide surface 454 of the burner body 4 that is located obliquely below the nozzles of each burner hole 32, and spreads obliquely upward from that portion.

[0075] That is, in the gas burner 1 of one embodiment, a flow of mixed gas is generated on both sides of the two ignition flame holes 31 in the circumferential direction, where the mixed gas hits a part of the upper surface 45 of the burner body 4 and is diffused obliquely upward. The mixed gas flow generated here acts as a barrier to suppress the influence of crosswinds on the mixed gas ejected from the two ignition flame holes 31. Therefore, even when there is a wind, the mixed gas ejected from each ignition flame hole 31 is effectively prevented from being blown away by the wind and causing ignition failure.

[0076] In the combustion state after successful ignition, the flames ejected from the pair of flame holes 32 are affected by natural convection occurring upward. Therefore, although the mixed gas is ejected obliquely downward from the pair of flame holes 32, the flames ejected from the pair of flame holes 32 are formed stably without hitting the upper surface 45 of the burner body 4.

[0077] 2. Variations The present disclosure has been described above based on the embodiments shown in the accompanying drawings, but the present disclosure is not limited to the above embodiments. As long as it is within the intended scope of the present disclosure, appropriate design modifications such as the modified examples listed below can be made, and the following multiple modified examples can be appropriately combined and applied.

[0078] In the gas burner 1 of one embodiment, the burner cap 2 has two ignition flame holes 31, but the number of ignition flame holes 31 is not limited to this. For example, the burner cap 2 may have one ignition flame hole 31. In this case, it is preferable to provide a pair of flame holes 32 so as to be located on both sides in the circumferential direction of one ignition flame hole 31. Furthermore, when the burner cap 2 has three or more ignition flame holes 31, it is preferable to provide a pair of flame holes 32 so as to be located on both sides in the circumferential direction of the three or more ignition flame holes 31.

[0079] In the gas burner 1 of one embodiment, the upper ends of the outlets of the pair of burner holes 32 are located lower than the upper ends of the outlets of the other plurality of burner holes 33, but the present invention is not limited thereto, and the upper ends of the outlets of the pair of burner holes 32 may be located at the same height as the upper ends of the outlets of the other plurality of burner holes 33, or may be located higher than the upper ends of the outlets of the other plurality of burner holes 33. Even in this case, the mixed gas ejected obliquely downward from the pair of burner holes 32 hits a part of the upper surface 45 of the burner body 4 and spreads, and can play a role like a barrier to suppress the influence of a cross wind.

[0080] In one embodiment of the gas burner 1, all of the multiple other flame holes 33 of the burner cap 2 are configured to eject the mixed gas diagonally upward, but this is not limited to this, and for example, at least one of the multiple other flame holes 33 may be configured to eject the mixed gas horizontally or diagonally downward.

[0081] In the gas burner 1 of one embodiment, both of the pair of flame holes 32 are downward flame holes configured to eject the mixed gas obliquely downward, but the present invention is not limited to this, and only one of the pair of flame holes 32 may be a downward flame hole. In other words, it is sufficient that at least one of the pair of flame holes 32 is a downward flame hole. Even if only one of the pair of flame holes 32 is a downward flame hole, the mixed gas ejected obliquely downward from that downward flame hole hits a part of the upper surface 45 of the burner body 4 and spreads, and can play a role like a barrier that suppresses the influence of a cross wind.

[0082] In addition, when only one of the pair of burner holes 32 is a downward-facing burner hole, it is preferable that only the burner hole 32 on the first circumferential side of the pair of burner holes 32 is a downward-facing burner hole. The first circumferential side is the left side when the ignition target part 26 is viewed from the front when the burner cap 2 is placed. The second circumferential side is the right side when the ignition target part 26 is viewed from the front when the burner cap 2 is placed. In the gas burner 1 of one embodiment, the direction of the multiple burner holes 3 of the burner cap 2 (i.e., the direction in which the mixed gas is ejected from each burner hole 3) is inclined toward the second circumferential side with respect to the radially outward direction. In other words, it is preferable that the side on which the burner hole 32 forming the downward-facing burner hole is located is the side opposite to the side on which each burner hole 3 is inclined with respect to the radially outward direction.

[0083] In one embodiment of the gas burner 1, it is preferable that the angle θ2 at which the inclined surface 335 of the other burner hole 33 is inclined with respect to the horizontal plane P1 is set within a range of 20° to 15°, or within a range of 25° to 10°, but this is not limited to this. For example, if the fuel gas contains a higher hydrogen component than conventionally, the angle θ2 may be set within a wider range (for example, within a range of 5° to 30°).

[0084] The cooking appliance 9 in one embodiment is a drop-in type gas stove, but is not limited to this, and various types of appliances can be adopted as long as the gas burner 1 is attached.

[0085] 3. Summary As described above based on one embodiment and various modified examples, the gas burner for a stove (1) of the first aspect includes an annular burner cap (2) having a plurality of flame holes (3) on the outer periphery, and a burner body (4) having an upper surface (45) on which the burner cap (2) is placed. The plurality of flame holes (3) include an ignition flame hole (31) and a pair of flame holes (32) located on both sides in the circumferential direction with the ignition flame hole (31 in between). At least one of the pair of flame holes (32) is a downward flame hole configured to eject mixed gas obliquely downward.

[0086] According to this embodiment, the mixed gas ejected obliquely downward from at least one of the pair of flame holes (32) of the burner cap (2) hits a part of the upper surface (45) of the burner body (4) and spreads, thereby acting as a barrier to suppress the influence of a cross wind on the mixed gas ejected from the ignition flame hole (31). Therefore, the ignition performance of the stove gas burner (1) is improved.

[0087] In the second embodiment of the gas burner for a stove (1), the downward flame hole in the first embodiment is formed with an inclined surface (325) for ejecting the mixed gas obliquely downward.

[0088] According to this embodiment, the mixed gas flowing through the downward flame hole of the burner cap (2) flows along the inclined surface (325) of the downward flame hole, and is smoothly ejected obliquely downward.

[0089] In the gas burner for a stove (1) of the third embodiment, in the first or second embodiment, a part of the upper surface (45) of the burner body (4) is positioned radially outward of the burner cap (2) beyond the downward flame hole.

[0090] According to this embodiment, the mixed gas ejected from the downward flame holes of the burner cap (2) can be effectively directed against a part of the upper surface (45) of the burner body (4).

[0091] In the gas burner (1) for a stove of the fourth aspect, in any one of the first to third aspects, the upper surface (45) of the burner body (4) includes a mounting surface (452) on which the burner cap (2) is mounted, and a guide surface (454) that guides the flame spread between the plurality of flame holes (3) of the burner cap (2). The downward flame holes are configured so that the mixed gas ejected obliquely downward from the downward flame holes hits the guide surface (454).

[0092] According to this embodiment, the mixed gas ejected from the downward flame holes of the burner cap (2) hits the guide surface (454) of the burner body (4) and spreads, thereby effectively functioning as a barrier against cross winds.

[0093] In the fifth aspect of the gas burner for a stove (1), in any one of the first to fourth aspects, the upper end of the outlet of the downward flame hole is located at a lower position than the upper ends of the outlets of all the flame holes (3) excluding the ignition flame hole (31) and the downward flame hole.

[0094] According to this embodiment, the mixed gas ejected from the downward flame holes of the burner cap (2) can be effectively directed against a part of the upper surface (45) of the burner body (4).

[0095] A cooking device (9) of a sixth aspect includes a gas burner for a stove (1) of any one of the first to fifth aspects, and a cooking device body (8) to which the gas burner for a stove (1) is attached.

[0096] According to this embodiment, it is possible to provide a cooking device (9) having high ignition performance. [Explanation of symbols]

[0097] 1 Gas burner for stove 2 Burner Cap 3 flame holes 31 Ignition flame hole 32 Flame hole 325 Slope 4 Burner body 45 Top 452 Placement surface 454 Guidance surface 8 Cooking appliance body 9 Heating cooker

Claims

1. an annular burner cap having a plurality of flame holes on an outer periphery thereof; a burner body having an upper surface on which the burner cap is placed; The plurality of flame holes include an ignition flame hole and a pair of flame holes located on both sides in the circumferential direction with the ignition flame hole sandwiched therebetween, At least one of the pair of flame holes is a downward flame hole configured to eject the mixed gas obliquely downward. Gas burner for stove.

2. The downward flame hole is formed with an inclined surface for ejecting the mixed gas obliquely downward.

2. The gas burner for a stove according to claim 1.

3. A part of the upper surface of the burner body is located radially outward of the burner cap beyond the downward flame hole.

2. The gas burner for a stove according to claim 1.

4. The upper surface of the burner body includes a mounting surface on which the burner cap is mounted and an induction surface that induces flame transfer between the plurality of flame holes of the burner cap, The downward flame hole is configured so that the mixed gas ejected obliquely downward from the downward flame hole hits the guide surface.

2. The gas burner for a stove according to claim 1.

5. An upper end of the outlet of the downward flame hole is located lower than an upper end of the outlet of each of the plurality of flame holes excluding the ignition flame hole and the downward flame hole.

2. The gas burner for a stove according to claim 1.

6. A gas burner for a stove according to any one of claims 1 to 5; A cooking appliance body equipped with the gas burner for a stove. Heating cooker.

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