Gas stove

Abstract

The present invention provides a gas stove which avoids as much as possible the feeling of uneasiness caused to the user by the overflow of the flame when the stove burner is ignited. The burner head (21) of the stove burner (2) has a plurality of divided head areas (211-214) divided in the circumferential direction, and is provided with a valve mechanism capable of supplying fuel gas to the divided head areas respectively. During ignition, the fuel gas is first supplied to the divided head area (213) existing in the rear part of the burner head (21) through the valve mechanism to ignite it. Even if the rear divided head area (213) ignites with a relatively large flame due to ignition delay, the flame will not overflow toward the front edge of the top plate (4). Therefore, it is possible to avoid the situation in which the flame approaches the user standing in front of the top plate (4) and causes the user to feel uneasy.

Description

Technical Field

[0001] The invention relates to a gas stove, which comprises: a stove burner, which has a burner head facing a burner opening arranged on a top plate and formed with a plurality of flame ports; and a fire support, which is arranged on the top plate in a manner of surrounding the burner opening. Background Art

[0002] In the past, there is a known technique that includes a mechanism for detecting the size of a cooking container placed on a fire support, and when the cooking container is smaller than a predetermined diameter, the maximum value of the adjustment range of the fire intensity adjustment mechanism of the burner of the gas stove is reduced (for example, see Patent Document 1). Thus, when a small cooking container is placed on the fire support, it is possible to avoid the situation where the flame of the burner of the stove overflows from the bottom surface of the cooking container to the outside, causing a user to feel uneasy.

[0003] However, in such gas stoves, there is a situation where the ignition delay caused by poor ignition discharge at the ignition electrode causes the ignition to start with a relatively large flame and cause flame overflow. In addition, if the flame overflows toward the front edge of the top plate or the lateral side edge of the top plate close to the stove burner, the flame approaches the user standing in front of the top plate or the user reaching to the side of the top plate to operate, which may make the user feel uneasy.

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Laid-Open No. 9-53827 Summary of the invention

[0006] In view of the above, the present invention aims to provide a gas stove that can avoid as much as possible the feeling of insecurity caused to the user by the overflow of the flame when the stove burner is ignited.

[0007] In order to solve the above problems, the gas stove of the first invention of the present application includes: a stove burner having a burner head facing a burner opening provided in the top plate and formed with a plurality of flame ports; and a fire support provided on the top plate so as to surround the burner opening, wherein the burner head has a plurality of divided head regions divided in the circumferential direction and is provided with a valve mechanism capable of supplying fuel gas to the plurality of divided head regions respectively. When there is a single divided head region in the portion of the burner head farthest from the front edge of the top plate, this divided head region is set as the first ignition divided head region. When there are two divided head regions adjacent to each other laterally in the portion of the burner head farthest from the front edge of the top plate, the divided head region farther from the lateral side edge of the top plate, which is closer to the center of the burner head, among the two divided head regions is set as the first ignition divided head region. During ignition, the valve mechanism first supplies fuel gas to the first ignition divided head region to ignite the first ignition divided head region.

[0008] In addition, the gas stove of the second invention of the present application includes: a stove burner having a burner head facing a burner opening provided in the top plate and formed with a plurality of flame ports; and a fire support provided on the top plate so as to surround the burner opening, wherein the stove burner is composed of a parent-child burner, and the parent-child burner has a child burner head and an annular parent burner head surrounding the child burner head as the burner head. The parent burner head has a plurality of divided head regions divided in the circumferential direction and is provided with: a valve mechanism for the parent burner capable of supplying fuel gas to the plurality of divided head regions respectively; a valve mechanism for the child burner capable of supplying fuel gas to the child burner head; and a flame detection mechanism for detecting the flame of the child burner head. When there is a single divided head region in the portion of the parent burner head farthest from the front edge of the top plate, this divided head region is set as the first ignition divided head region. When there are two divided head regions adjacent to each other laterally in the portion of the parent burner head farthest from the front edge of the top plate, the divided head region farther from the lateral side edge of the top plate, which is closer to the center of the burner head, among the two divided head regions is set as the first ignition divided head region. During ignition, first, the valve mechanism for the child burner supplies fuel gas to the child burner head to ignite the child burner head. After the flame of the child burner head is detected by the flame detection mechanism, the valve mechanism for the parent burner first supplies fuel gas to the first ignition divided head region among the plurality of divided head regions of the parent burner head.

[0009] According to the present invention (the first invention and the second invention), among the plurality of divided head regions formed by circumferentially dividing the burner head (the mother burner head in the second invention), the divided head region that is relatively far from the front edge of the top plate and the lateral side edge of the top plate close to the burner head becomes the first ignition divided head region, and fuel gas is first supplied to the first ignition divided head region for ignition during ignition. Therefore, even if ignition is delayed and a relatively large flame ignites in the first ignition divided head region, there will be no flame overflow towards the front edge of the top plate or the lateral side edge of the top plate close to the burner head. Therefore, it is possible to avoid the situation where the flame approaches a user standing in front of the top plate or a user reaching out to operate on the side of the top plate, which may cause uneasiness to the user.

[0010] In addition, preferably, the burner head has at least three divided head regions formed by circumferential division. When there is a separate divided head region in the part of the burner head that is farthest from the front edge of the top plate, the divided head region that is relatively far from the lateral side edge of the top plate closest to the center of the burner head among the two divided head regions adjacent to the lateral one side and the other side of this divided head region is set as the second ignition divided head region. When there are two divided head regions adjacent to each other laterally in the part of the burner head that is farthest from the front edge of the top plate, the divided head region that is relatively close to the lateral side edge of the top plate closest to the center of the burner head among the two divided head regions is set as the second ignition divided head region. During ignition, after supplying fuel gas to the first ignition divided head region through the valve mechanism, fuel gas is then supplied to the second ignition divided head region. Accordingly, ignition of the divided head region close to the front edge of the top plate among the plurality of divided head regions is carried out after ignition of the second ignition divided head region. Therefore, it is possible to gain the time for the user to leave from the front edge of the top plate before ignition of the divided head region close to the front edge of the top plate. Therefore, even if flame overflow occurs during ignition of the divided head region close to the front edge of the top plate, the flame does not approach the user who has left from the front edge of the top plate, and the uneasiness brought to the user can be alleviated.

[0011] In addition, in this case, preferably, the gas stove includes: a flame detection mechanism for detecting the flame in the first ignition divided head region. During ignition, after detecting the flame in the first ignition divided head region through the flame detection mechanism, combustion gas is supplied to the second ignition divided head region. Accordingly, it is possible to prevent in advance the situation where ignition with a relatively large flame occurs when fuel gas is supplied to the second ignition divided head region while the first ignition divided head region is in an unignited state.

[0012] In addition, in the present invention, preferably, a flame port is formed on the upper surface of the burner head. Accordingly, compared with the case where a flame port is formed on the outer peripheral surface of the burner head, it is difficult for the flame to overflow, and it is possible to more effectively avoid the situation of causing uneasiness to the user. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 FIG. 1 is a perspective view showing the installation state of a gas stove according to a first embodiment of the present invention.

[0014] Figure 2 FIG. 2 is an enlarged top view of the installation portion of the left stove burner of the gas stove according to the first embodiment.

[0015] Figure 3 FIG. 3 is a sectional view taken along line III-III of FIG. Figure 2 2.

[0016] Figure 4 FIG. 4(a) is a perspective view of the upper head member of the left stove burner of the gas stove according to the first embodiment as viewed obliquely from below, Figure 4 and FIG. 4(b) is a perspective view of the lower head member of the left stove burner of the gas stove according to the first embodiment and the burner support as viewed obliquely from above.

[0017] Figure 5 FIG. 5 is an enlarged top view of the installation portion of the right stove burner of the gas stove according to the first embodiment.

[0018] Figure 6 FIG. 6 is a sectional view taken along line VI-VI of FIG. Figure 5 5.

[0019] Figure 7 FIG. 7(a) is a perspective view of the upper head member of the right stove burner of the gas stove according to the first embodiment as viewed obliquely from below, Figure 7 and FIG. 7(b) is a perspective view of the lower head member of the right stove burner of the gas stove according to the first embodiment and the burner support as viewed obliquely from above.

[0020] Figure 8 FIG. 8 is a perspective view of the range hood provided above the installation portion of the gas stove according to the first embodiment as viewed obliquely from below.

[0021] Figure 9 FIG. 9 is a top view of the main part of the gas stove according to the second embodiment corresponding to FIG. Figure 2 8.

[0022] Figure 10 FIG. 10 is a top view of the main part of the gas stove according to the third embodiment corresponding to FIG. Figure 2 9.

[0023] Figure 11 is the top view of the main part of the gas stove of the fourth embodiment corresponding to Figure 2

[0024] Figure 12 is the top view of the main part of the gas stove of the fifth embodiment corresponding to Figure 2

[0025] Figure 13 is the top view of the main part of the gas stove of the sixth embodiment corresponding to Figure 2

[0026] Figure 14 is the top view of the main part of the gas stove of the seventh embodiment corresponding to Figure 2

[0027] Explanation of the drawing text

[0028] 2, 3... stove burners; 21, 31... burner heads; 31a... sub - burner head; 31b... main - burner head; 211 - 214, 31b1 - 31b4... dividing head regions; #1... first ignition dividing head region; #2... second ignition dividing head region; 24, 34... flame ports; 2631 - 2634... on - off valves (valve mechanisms); 3631 - 3634... on - off valves (valve mechanisms for main burners); 3635... on - off valve (valve mechanism for sub - burners); 28, 38... thermocouples (flame detection mechanisms); 4... top plate; 411, 412... openings for burners; 51, 52... fire supports. Detailed implementation manners

[0029] Referring to Figure 1 , the gas stove of the embodiment of the present invention is an embedded stove in which the stove main body 1 is recessed into a stove opening CTa formed in the countertop CT of a modular kitchen, and is provided with two left - and - right stove burners 2, 3. As Figure 2 , Figure 3 shown, the left - hand stove burner 2 has a burner head 21, and this burner head 21 faces an opening 411 for the burner, and this opening 411 for the burner is an opening provided in the left half of a top plate 4 that covers the open upper surface of the stove main body 1. As Figure 5 , Figure 6 ​​​​As shown, the burner 3 on the right side also has a burner head 31, which faces the burner opening 412. The burner opening 412 is an opening provided in the right half of the top plate 4. In addition, the gas stove is provided with fire supports 51 and 52, which are arranged on the top plate 4 so as to surround the respective burner openings 411 and 412. In addition, annular members 421 and 422 are installed on the top plate 4, and the annular members 421 and 422 seal the gaps between the respective burner openings 411 and 412 and the burner heads 21 and 31 of the respective stove burners 2 and 3. In addition, left and right ignition and extinguishing buttons 121 and 122 for the left and right stove burners 2 and 3 are provided on the operation panel 11 on the front surface of the stove body 1. Each of the ignition and extinguishing buttons 121 and 122 can also indicate the fire intensity of the respective stove burners 2 and 3 through its rotational operation.

[0030] Referring to Figure 4 , the burner head 21 of the left stove burner 2 has: four divided head regions 211 to 214 obtained by circumferential division. Specifically, the burner head 21 includes: an annular lower head member 22 and an annular upper head member 23 provided on the lower head member 22. Four radial ribs 221 are erected at equal intervals along the circumference on the upper surface of the lower head member 22. In addition, four radial ribs 231 are vertically arranged at equal intervals along the circumference on the lower surface of the upper head member 23. Moreover, by making the upper edges of the respective radial ribs 221 of the lower head member 22 abut against the lower edges of the respective radial ribs 231 of the upper head member 23, the burner head 21 is divided into: a front first divided head region 211, a left second divided head region 212, a rear third divided head region 213, and a right fourth divided head region 214. In addition, a plurality of flame ports 24 for ejecting the mixed gas are formed on the upper surface of the upper head member 23 from the respective divided head regions 211 to 214.

[0031] The burner head 21 is supported by the burner bracket 131 by embedding the lower ends of a plurality of vertical struts 222 of the lower head member 22 into a plurality of support holes 131 formed in the burner bracket 131 fixed to the left half portion within the stove body 1. In addition, a mixing tube portion 223 extending downward from the central portions of the respective divided head regions 211 to 214 is vertically provided in the lower head member 22. Further, first to fourth nozzles 251 to 254 are provided in the burner bracket 131, and the first to fourth nozzles 251 to 254 face the lower end openings of the mixing tube portions 223 extending from the first to fourth divided head regions 211 to 214. In addition, a guide plate portion 224 is provided in the lower head member 22, and the guide plate portion 224 is opposed to the upper end openings of the respective mixing tube portions 223 with a slight gap therebetween. The fuel gas ejected from the respective nozzles 251 to 254 collides with the respective guide plate portions 224 and diffuses into the respective divided head regions 211 to 214. Primary air is sucked in from the lower end openings of the respective mixing tube portions 223 by the resulting radial Venturi effect to produce a mixed gas.

[0032] A safety valve 261 is interposed in the gas supply passage 26 for the left stove burner 2. For the safety valve 261, when an ignition operation is performed using the ignition and extinguishing button 121, it is opened by the control performed by the controller 61 for the stove burner 2 that has received the operation signal of the ignition and extinguishing button 121, and when a fire is detected by a decrease in the electromotive force of the thermocouple 28 described later, or when the bottom temperature sensor 29 described later detects overheating of the cooking container, it is closed by the control performed by the controller 61. In addition, the gas supply passage 26 branches into first to fourth branch passages 261 to 264 communicating with the first to fourth nozzles 251 to 254 on the downstream side of the safety valve 261. First to fourth on-off valves 2621 to 2624 and first to fourth flame adjustment valves 2631 to 2634 are interposed in the first to fourth branch passages 261 to 264. Moreover, these on-off valves 2621 to 2624 constitute a valve mechanism capable of supplying fuel gas to the respective divided head regions 211 to 214 separately.

[0033] In addition, the stove burner 2 on the left side is provided with: an ignition electrode 27 that performs spark discharge through the control by the controller 61 during an ignition operation using the ignition / off button 121, a thermocouple 28, and a bottom temperature sensor 29 that abuts against the bottom surface of the cooking container placed on the trivet 51 to detect its temperature. The ignition electrode 27 is arranged to face the ignition flame port 24a, which is formed at the inner peripheral corner part of the upper surface of the part that matches the third dividing head area 213 of the first ignition dividing head area, which will be described later, of the upper head part 23. In addition, the thermocouple 28 is arranged to face the flame detection flame port 24b, which is formed across the inner peripheral corner part of the upper surface of the third dividing head area 213 and the fourth dividing head area 214 of the upper head part 23. Moreover, the thermocouple 28 constitutes a flame detection mechanism for detecting the flame in the first ignition dividing head area. In addition, a transfer flame port 24c is formed in the upper head part 23, and the transfer flame port 24c is located on both sides of the vicinity of the inner peripheral part of the vertical installation position of each radial rib 231 and is used to transfer the flame to the adjacent dividing head area.

[0034] Refer to Figures 5 to 7, the stove burner 3 on the right side is composed of a mother-and-son burner, and this mother-and-son burner has a son burner head 31a and an annular mother burner head 31b surrounding the son burner head 31a as the burner head 31. In addition, the mother burner head 31b has four first to fourth divided head regions 31b1 to 31b4 divided along the circumferential direction. Specifically, the son burner head 31a and the mother burner head 31b are composed of an annular common lower head member 32 and an annular common upper head member 33 provided on the lower head member 32. An annular rib 321a, which divides the son burner head 31a from the mother burner head 31b, is erected on the upper surface of the lower head member 32; and four radial ribs 321 are located on the mother burner head 31b side closer to the radially outer side than the annular rib 321a and are arranged at equal intervals along the circumferential direction. In addition, an annular rib 331a, which divides the son burner head 31a from the mother burner head 31b, is vertically provided on the lower surface of the upper head member 33; and four radial ribs 331 are located on the mother burner head 31b side closer to the radially outer side than the annular rib 331a and are arranged at equal intervals along the circumferential direction. Moreover, by making the lower edges of the annular rib 331a and each radial rib 331 of the upper head member 33 abut on the upper edges of the annular rib 321a and each radial rib 321 of the lower head member 32, the burner head 31 is divided into the inner circumferential son burner head 31a and the outer circumferential mother burner head 31b, and the mother burner head 31b is divided into a front first divided head region 31b1, a left second divided head region 31b2, a rear third divided head region 31b3, and a right fourth divided head region 31b4. In addition, a plurality of flame ports 34 for ejecting the mixed gas are formed on the upper surface of the upper head member 33 from each of the divided head regions 31b1 to 31b4 and the son burner head 31a.

[0035] The burner head 31 is supported on the burner bracket 132 by inserting the lower ends of a plurality of struts 322 vertically provided on the lower head member 32 into a plurality of support holes 131 formed on the burner bracket 132 fixed to the right half within the cooker body 1. Further, a mixing tube portion 323 is vertically provided on the lower head member 32, and the mixing tube portion 323 extends downward from the central portion of each divided head region 31b1 to 31b4 and a circumferential position of the sub-burner head 31a. Additionally, on the burner bracket 132, there are provided: first to fourth nozzles 351 to 354 facing the lower end openings of the mixing tube portions 323 extending from the first to fourth divided head regions 31b1 to 31b4; and a fifth nozzle 355 facing the lower end opening of the mixing tube portion extending from the sub-burner head 31a. Further, a guide plate portion 324 is provided on the lower head member 32, and the guide plate portion 324 is opposed to the upper end openings of the respective mixing tube portions 323 with a slight gap therebetween. Moreover, similar to the left cooker burner 2 described above, a radial Venturi effect of sucking primary air from the lower end openings of the respective mixing tube portions 323 can be obtained.

[0036] A safety valve 361 is interposed in the gas supply passage 36 for the right cooker burner 3. For the safety valve 361, during an ignition operation using the ignition and extinguishing button 122, it is opened by the control performed by the controller 62 for the cooker burner 3 that has received the operation signal of the ignition and extinguishing button 122, and when a fire failure is detected by a decrease in the electromotive force of the thermocouple 38 described later, or when the bottom temperature sensor 39 described later detects overheating of the cooking container, it is closed by the control performed by the controller 62. The gas supply passage 36 branches on the downstream side of the safety valve 361 into first to fifth branch passages 361 to 365 connected to the first to fifth nozzles 351 to 355. First to fifth on-off valves 3621 to 3625 and first to fifth flame regulating valves 3631 to 3635 are interposed in the first to fifth branch passages 361 to 365. Moreover, the first to fourth on-off valves 3621 to 3624 constitute a valve mechanism for the main burner capable of supplying fuel gas to the first to fourth divided head regions 31b1 to 31b4 respectively, and the fifth on-off valve 3625 constitutes a valve mechanism for the sub-burner capable of supplying fuel gas to the sub-burner head 31a.

[0037] In addition, the following components are attached to the stove burner 3 on the right side: an ignition electrode 37 that generates spark discharge under the control of the controller 62 during an ignition operation using the ignition and extinguishing button 122, a thermocouple 38, and a bottom temperature sensor 39 that abuts against the bottom surface of the cooking container placed on the trivet 52 to detect its temperature. The ignition electrode 37 is arranged facing the ignition flame port 34a, which is formed at the inner peripheral corner of the upper surface of a part that matches the rear part of the sub-burner head area 315 of the upper head member 33. In addition, the thermocouple 38 is arranged facing the flame detection port 34b, which is formed at the inner peripheral corner of the upper surface that is slightly separated from the ignition flame port 34a of the upper head member 33 in one circumferential direction. Moreover, the thermocouple 38 constitutes a flame detection mechanism for detecting the flame of the sub-burner head 31a. Further, a transfer flame port 34c is formed in the upper head member 33, which is located near the vertical installation positions of the annular rib 331a and each radial rib 331, and is used to make the flame move between each divided head area and the sub-burner head area 315 and between adjacent divided head areas.

[0038] In addition, as Figure 8 shown, the gas stove of the present embodiment is provided with position detection mechanisms 71, 72, which are arranged on the lower surface of the range hood RH located above the tabletop CT and are composed of a pair of left and right CCD cameras. Each position detection mechanism 71, 72 looks down on and photographs the installation parts of the left and right stove burners 2, 3 to detect the positional correlation of the cooking container P (refer to Figure 2 , Figure 5 ) placed on each trivet 51, 52 relative to the burner heads 21, 31, that is, to detect the positional relationship between the center position of the cooking container P and the center position of the burner heads 21, 31.

[0039] The detection information from the position detection mechanism 71 on the left side is sent to the controller 61 for the stove burner 2 on the left side, and the detection information from the position detection mechanism 72 on the right side is sent to the controller 62 for the stove burner 3 on the right side. Moreover, each controller 61, 62 adjusts the fire intensity in each divided head area 211 - 214, 31b1 - 31b4 through each fire intensity regulating valve 2631 - 2634, 3631 - 3634 based on the positional correlation of the cooking container P relative to the burner heads 21, 31 detected by each position detection mechanism 71, 72, so that the entire cooking container P is heated evenly. For example, in the stove burner 2 on the left side, when the center of the cooking container P is relative to the center of the burner head 21 as Figure 2When it deviates obliquely backward to the left as shown, the fire in the first and fourth dividing head regions 211 and 214 located in the front and right is made weaker than the fire indicated by the rotation operation of the ignition extinguishing button 121, and the fire in the second and third dividing head regions 212 and 213 located in the left and rear is made stronger than the indicated fire, so that the entire cooking container P is evenly heated. In addition, in the right cooking burner 3, for example, when the center of the cooking container P deviates backward relative to the center of the burner head 31 as Figure 5 shown, the fire in the second and fourth dividing head regions 31b2 and 31b4 on the left and right is maintained at the fire indicated by the rotation operation of the ignition extinguishing button 122, and the fire in the first dividing head region 31b1 located in the front is made weaker than the indicated fire, and the fire in the third dividing head region 31b3 located in the rear is made stronger than the indicated fire, so that the entire cooking container P is evenly heated.

[0040] In addition, if the ignition of the left cooking burner 2 is delayed, it ignites with a relatively large flame, resulting in the flame spilling outside the bottom surface of the cooking container P. Moreover, if the flame spills toward the front edge of the top plate 4, that is, the left lateral edge of the top plate 4 close to the cooking burner 2, the flame approaches the user standing in front of the top plate 4 and the user who reaches out to operate on the part of the tabletop CT on the left side of the top plate 4, bringing a sense of uneasiness to the user.

[0041] Therefore, in the present embodiment, the separate dividing head region existing in the part of the burner head 21 farthest from the front edge of the top plate 4, that is, the third dividing head region 213, is selected as Figure 2 the first ignition dividing head region given the symbol #1; the dividing head region that is farther from the left lateral edge of the top plate 4, which is the left edge and the closest to the center of the burner head 21, among the second and fourth dividing head regions 212 and 214 adjacent to the left and right of the third dividing head region 213, that is, the fourth dividing head region 214, is selected as Figure 2 the second ignition dividing head region given the symbol #2; the second dividing head region 212 close to the left edge of the top plate 4 is selected as Figure 2 the third ignition dividing head region given the symbol #3; the first dividing head region 211 closest to the front edge of the top plate 4 is selected as Figure 2The fourth ignition dividing head area assigned the symbol #4. Moreover, when performing an ignition operation using the ignition extinguishing button 121, first, fuel gas is supplied to the third dividing head area 213, which is the first ignition dividing head area, by opening the third on-off valve 2623 to cause ignition. Then, when ignition of the third dividing head area 213 is detected by the thermocouple 28, the fourth on-off valve 2624, the second on-off valve 2622, and the first on-off valve 2621 are opened sequentially with a time difference, causing the fourth dividing head area 214, which is the second ignition dividing head area, the second dividing head area 212, which is the third ignition dividing head area, and the first dividing head area 211, which is the fourth ignition dividing head area, to have sequential flame transfer and ignition.

[0042] Thus, even if ignition is delayed and a relatively large flame ignites in the third dividing head area 213, there will be no flame spillage towards the front edge or left edge of the top plate 4. Therefore, it is possible to avoid the situation where the flame approaches a user standing in front of the top plate 4 or a user reaching out to operate on the tabletop CT to the left side of the top plate 4, causing uneasiness to the user. In addition, in the first dividing head area 211 close to the front edge of the top plate 4, ignition occurs later compared to other dividing head areas. Therefore, it is possible to gain the time for the user to move away from the front edge of the top plate 4 before ignition of the first dividing head area 211. Thus, even if flame spillage occurs during ignition of the first dividing head area 211, the flame will not approach the user who has moved away from the front edge of the top plate 4, and the uneasiness caused to the user can be reduced.

[0043] In addition, since fuel gas is supplied to the fourth dividing head area 214, which is the second ignition dividing head area, after detecting ignition of the third dividing head area 213, which is the first ignition dividing head area, it is possible to prevent in advance the situation where ignition occurs with a relatively large flame when fuel gas is supplied to the fourth dividing head area 214 while the third dividing head area 213 is in an unignited state. Moreover, since the flame ports 24 are formed on the upper surface of the burner head 21, compared with the case where the flame ports are formed on the outer peripheral surface of the burner head 21, it is difficult for flame spillage to occur, and it is possible to effectively avoid the situation of causing uneasiness to the user.

[0044] In the right stove burner 3, the separate dividing head area existing in the part of the mother burner head 31b farthest from the front edge of the top plate 4, that is, the third dividing head area 31b3, is selected as Figure 5 the first ignition dividing head area assigned the symbol #1; the dividing head area with a relatively longer distance from the right edge of the top plate 4, which is the lateral side edge of the top plate 4 closest to the center of the burner head 31, among the two dividing head areas 31b2 and 31b4 adjacent to the left and right of the third dividing head area 31b3, that is, the second dividing head area 31b2, is selected asFigure 5 the second ignition dividing head region assigned the symbol #2 in; the fourth dividing head region 31b4 near the right edge of the top plate 4 is selected as Figure 5 the third ignition dividing head region assigned the symbol #3 in; the first dividing head region 31b1 closest to the front edge of the top plate 4 is selected as Figure 5 the fourth ignition dividing head region assigned the symbol #4 in.

[0045] In addition, when performing an ignition operation using the ignition extinguishing button 122, first, fuel gas is supplied to the sub-burner head 31a by opening the fifth on-off valve 3625 for ignition. Then, when ignition of the sub-burner head 31a is detected by the thermocouple 38, the third on-off valve 3623, the second on-off valve 3622, the fourth on-off valve 3624, and the first on-off valve 3621 are opened in sequence, so that the third dividing head region 31b3 as the first ignition dividing head region, the second dividing head region 31b2 as the second ignition dividing head region, the fourth dividing head region 31b4 as the third ignition dividing head region, and the first dividing head region 31b1 as the fourth ignition dividing head region are ignited by transferring the flame in sequence. Thus, similar to the left stove burner 2 described above, it is possible to avoid the situation where the user feels uneasy due to the flame overflow during ignition.

[0046] In addition, in the above first embodiment, although the third dividing head region 213 exists alone in a part of the burner head 21 farthest from the front edge of the top plate 4, it can also be as Figure 9 shown in the second embodiment, where in a part of the burner head 21 farthest from the front edge of the top plate 4, the second and third dividing head regions 212 and 213 exist adjacent to each other horizontally. In this case, the third dividing head region 213, which is farther from the left lateral edge of the top plate 4, the closest to the center of the burner head 21 among the above two dividing head regions 212 and 213, is selected as the first ignition dividing head region assigned the symbol #1 (the dividing head region that supplies fuel gas for ignition first during ignition). In addition, the second dividing head region 212 close to the left edge of the top plate 4 is selected as the second ignition dividing head region assigned the symbol #2 (the dividing head region that supplies fuel gas second during ignition), the fourth dividing head region 214, which is farther from the left edge of the top plate 4, among the first and fourth dividing head regions 211 and 214 close to the front edge of the top plate 4, is selected as the third ignition dividing head region assigned the symbol #3 (the dividing head region that supplies fuel gas third during ignition), and the first dividing head region 214 close to the left edge of the top plate 4 is selected as the fourth ignition dividing head region assigned the symbol #4 (the dividing head region that supplies fuel gas last during ignition).

[0047] In addition, it is also possible to asFigure 10 , Figure 11 As in the third and fourth embodiments shown, the burner head 21 is circumferentially divided into three divided head regions 211, 212, and 213, namely the first to third. Moreover, as in Figure 10 the third embodiment shown, when there are two divided head regions 212 and 213 adjacent to each other laterally in the part of the burner head 21 farthest from the front edge of the top plate 4, the third divided head region 213, which is farther from the left lateral edge of the top plate 4, i.e., the left edge, which is the lateral side edge of the top plate 4 closest to the center of the burner head 21 among these two divided head regions 212 and 213, is selected as the first ignition divided head region assigned the symbol #1, the second divided head region 212 is selected as the second ignition divided head region assigned the symbol #2, and the first divided head region 211 closest to the front edge of the top plate 4 is selected as the third ignition divided head region assigned the symbol #3.

[0048] In addition, as in Figure 11 the fourth embodiment shown, when there is only the second divided head region 212 in the part of the burner head 21 farthest from the front edge of the top plate 4, the second divided head region 212 is selected as the first ignition divided head region assigned the symbol #1, and the third divided head region 213, which is farther from the left lateral edge of the top plate 4, i.e., the left edge, which is the lateral side edge of the top plate 4 closest to the center of the burner head 21 among the two divided head regions 211 and 213 adjacent to the lateral one side and the other side of the second divided head region 212, is selected as the second ignition divided head assigned the symbol #2, and the first divided head region 211 close to the left edge of the top plate 4 is selected as the third ignition divided head region assigned the symbol #3.

[0049] In addition, as in Figures 12 to 14 the fifth to seventh embodiments shown, the burner head 21 can also be circumferentially divided into two divided head regions 211 and 212, namely the first and second. Moreover, as in Figure 12 the fifth embodiment shown, when there is only the second divided head region 212 in the part of the burner head 21 farthest from the front edge of the top plate 4, the second divided head region 212 is selected as the first ignition divided head region assigned the symbol #1, and the remaining first divided head region 211 is selected as the second ignition divided head region assigned the symbol #2.

[0050] In addition, in the fifth embodiment, although the first divided head region 211 is located in the front half of the burner head 21 and the second divided head region 212 is located in the rear half of the burner head 21, a part of the first divided head region 211 and a part of the second divided head region 212 may exist in the rear half of the burner head 21. In this case, if the perimeter of the part of one divided head region located in the rear half of the burner head 21 is longer than the perimeter of the part of the other divided head region located in the rear half of the burner head 21, it can be regarded that a separate divided head region exists in the part of the burner head 21 that is farthest from the front edge of the top plate 4. For example, as Figure 13 shown in the sixth embodiment, when the perimeter of the part of the second divided head region 212 located in the rear half of the burner head 21 is longer than the perimeter of the part of the first divided head region 211 located in the rear half of the burner head 21, it is regarded that a separate second divided head region 212 exists in the part of the burner head 21 that is farthest from the front edge of the top plate 4. Moreover, the second divided head region 212 is selected as the first ignition divided head region assigned the symbol #1, and the remaining first divided head region 211 is selected as the second ignition divided head region assigned the symbol #2.

[0051] In addition, as Figure 14 shown in the seventh embodiment, if the perimeter of the part of the first divided head region 211 located in the rear half of the burner head 21 is equal to the perimeter of the part of the second divided head region 212 located in the rear half of the burner head 21, it is regarded that the first and second divided head regions 211 and 212 exist adjacent to each other laterally in the part of the burner head 21 that is farthest from the front edge of the top plate 4. Moreover, the second divided head region 212, which is farther from the left lateral edge of the top plate 4, which is the lateral edge closest to the center of the burner head 21 among the two divided head regions 211 and 212, is selected as the first ignition divided head region assigned the symbol #1, and the first divided head region 211 is selected as the second ignition divided head region assigned the symbol #2.

[0052] In addition, regarding the divided head region of the mother burner head 31b of the stove burner 3, which is a mother-child burner, the same structure as that of the second to seventh embodiments described above can also be adopted.

[0053] As described above, the embodiments of the present invention have been described with reference to the accompanying drawings. However, the present invention is not limited thereto. For example, in the above-described embodiment, fuel gas is first supplied to the first ignition divided head region for ignition at the time of ignition, and then fuel gas is sequentially supplied to each of the divided head regions after the second ignition divided head region. However, after igniting the first ignition divided head region, fuel gas may be simultaneously supplied to two divided head regions adjacent to the left and right of the first ignition divided head region, and then fuel gas may be supplied to the following divided head region. In addition, in the above-described embodiment, the number of divisions of the burner head 21 and the mother burner head 31b is 2 to 4, but it may be 5 or more. In addition, although the gas stove of the above-described embodiment is an embedded stove, the present invention can also be applied to a tabletop stove provided on a gas table.

Claims

1. A gas stove, comprising: a stove burner having a burner head facing a burner opening provided in a top plate and formed with a plurality of flame ports; and a fire support provided on the top plate so as to surround the burner opening, characterized in that, the burner head has a plurality of divided head regions divided along the circumferential direction, and is provided with a valve mechanism capable of supplying fuel gas to the plurality of divided head regions respectively, when there is a single divided head region in the part of the burner head farthest from the front edge of the top plate, this divided head region is set as the first ignition divided head region; when there are 2 divided head regions adjacent to each other horizontally in the part of the burner head farthest from the front edge of the top plate, the divided head region farther from the lateral side edge of the top plate closest to the center of the burner head among the 2 divided head regions is set as the first ignition divided head region, at the time of ignition, the valve mechanism first supplies fuel gas to the first ignition divided head region to ignite the first ignition divided head region.

2. The gas stove according to claim 1, characterized in that, the burner head has at least 3 divided head regions divided along the circumferential direction, when there is a single divided head region in the part of the burner head farthest from the front edge of the top plate, the divided head region farther from the lateral side edge of the top plate closest to the center of the burner head among the 2 divided head regions adjacent to the lateral one side and the other side of this divided head region is set as the second ignition divided head region; when there are 2 divided head regions adjacent to each other horizontally in the part of the burner head farthest from the front edge of the top plate, the divided head region closer to the lateral side edge of the top plate closest to the center of the burner head among the 2 divided head regions is set as the second ignition divided head region, at the time of ignition, after the valve mechanism supplies fuel gas to the first ignition divided head region, it supplies fuel gas to the second ignition divided head region.

3. The gas stove according to claim 2, characterized in that, the gas stove is provided with: a flame detection mechanism for detecting the flame of the first ignition divided head region, at the time of ignition, after detecting the flame of the first ignition divided head region by the flame detection mechanism, combustion gas is supplied to the second ignition divided head region.

4. The gas stove according to any one of claims 1 to 3, characterized in that, flame ports are formed on the upper surface of the burner head.

5. A gas stove, comprising: a stove burner having a burner head facing a burner opening provided in a top plate and formed with a plurality of flame ports; and a fire support provided on the top plate so as to surround the burner opening, characterized in that, the stove burner is composed of a mother-and-son burner, and this mother-and-son burner has a son burner head and a ring-shaped mother burner head surrounding the son burner head as the burner head, The mother burner head has a plurality of divided head regions circumferentially divided, and is provided with: a valve mechanism for the mother burner, which can supply fuel gas to the plurality of divided head regions respectively; a valve mechanism for the sub-burner, which can supply fuel gas to the sub-burner head; and a flame detection mechanism, which detects the flame of the sub-burner head. When there is a separate divided head region in the part of the mother burner head farthest from the front edge of the top plate, this divided head region is set as the first ignition divided head region. When there are two divided head regions adjacent horizontally in the part of the mother burner head farthest from the front edge of the top plate, the divided head region farther from the lateral edge of the top plate closest to the center of the burner head among the two divided head regions is set as the first ignition divided head region. At the time of ignition, first, fuel gas is supplied to the sub-burner head through the valve mechanism for the sub-burner to ignite the sub-burner head. After the flame of the sub-burner head is detected by the flame detection mechanism, fuel gas is first supplied to the first ignition divided head region among the plurality of divided head regions of the mother burner head through the valve mechanism for the mother burner.

Images