JP2006022973A - Burner and stove using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a burner used in cooking equipment such as a stove capable of securing even heating distribution and high heating efficiency by suppressing uneven heating, and maintaining a good combustion state. <P>SOLUTION: A main burner port 8 for forming a main flame 7 and an ignition burner port 12 for forming a small flame 29 are provided on an outer peripheral part of a burner port molded body 1, and an irregular arrangement burner port 14 opened so that the main flame 7 approaches is provided in a periphery of the ignition burner port 12. Thereby, the good combustion state is secured, even heating distribution is achieved by suppressing degradation of the heating distribution in the ignition burner port 12, and the high heat efficiency can be secured by suppressing heat transfer to a pan simultaneously. A quenching distance is secured on a burner 10 for ignition and an auxiliary burner port 11 of the ignition burner port 12. Therefore, the stove used comfortably without feeling sense of uneasiness can be provided because combustion with explosive sound does not occur at times of ignition and extinction. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a burner using gas or the like as fuel and a stove using the burner as a heating source.

Conventionally, this type of burner, as shown in the enlarged view of the flame mouth arrangement surface of the flame mouth molded body of FIG. 6, in the burner in which the annular flame mouth molded body is placed on the upper part of the burner body, A part of the mounting surface of the flame mouth molded body 60 on the burner body is partitioned into a concave shape by three partition walls 61 and the concave outer peripheral side is opened to form an ignition space 62 for storing the ignition plug and the thermocouple. An ignition flame port 63 is provided in the central partition wall of the concave partition wall, and a slit flame port 64 through which air-fuel mixture is ejected is formed on the opposing partition wall of the concave partition wall. The small flame 65 is used to heat the thermocouple to detect combustion, and the flame 66 formed by the slit flame port 64 ensures the fire transfer to the entire flame mouth molded body 60, and further the small flame in the ignition space 62 is detected. Compensating for the drop in flame density caused by flame 65, Was that suppress the uneven heating of as over Na.
JP-A-8-114308

  However, in the conventional burner, since the ejection direction of the mixed gas ejected from the ignition flame port 63 and the ejection direction of the mixed gas ejected from the slit flame port 64 are substantially orthogonal, the flame formed at the ignition flame port 63 is Even with the small flame 65, the interference with the flame 66 formed by the slit flame port 64 cannot be prevented, the ignition space 62 becomes hot and the ventilation resistance increases, and the flame mouth molded body 60 and the burner main body are increased. There was a problem that the amount of primary air decreased, and as a result, yellow flames occurred with the passage of combustion time.

  In addition, when the temperature in the ignition space 62 becomes high, when only the flame is extinguished and only the air-fuel mixture is ejected, the rate of decrease in the electromotive force of the thermocouple is slowed down and mixing is performed for a relatively long time. There was also a problem that ki continued to erupt.

  Further, depending on the amount of mixed gas ejected from the ignition flame port 63 and the slit flame port 64, a vortex or the like is generated between them, and stable flame formation in the vicinity of the thermocouple is hindered, and the electromotive force level of the thermocouple is reduced. As a result, unstable combustion could not be detected and there was a problem such as premature disconnection.

  Further, even if the flame formed in the ignition flame port 63 when the burner is extinguished is a small flame 65, the mixed gas flow path length of the ignition flame port 63 is set so that the flame is extinguished simultaneously with the extinction of the slit flame port 64. This is because the length of the ignition flame channel is shorter than that of the slit flame port 64 and the flow resistance is matched so that uniform heating can be obtained regardless of the size of the flame. As the temperature in the ignition space 62 rises, the temperature of the ignition flame 63 itself rises, so that the flow rate of the mixed gas in the ignition flame passage of the ignition flame 63 just before the flame disappears is very small. As the mixed gas flowing in the high temperature ignition flame passage becomes hot, the combustion speed increases, and the relationship of combustion speed> mixed gas flow speed is generated, causing the phenomenon of backfire in the burner body and at the same time To accompany the phenomenon of extinguishing fire with an explosion sound, There was also a problem such as the use who give a sense of fear.

  In order to alleviate the above problems, there is a method of reducing the opening area of the slit flame opening, but when such a treatment is performed, the flame holding ability of the slit flame opening decreases. As a result, it was difficult to lift and stable combustion detection was difficult.

  The present invention solves the above-described conventional problems, and the size of the flame generated between the main flame formed at the main flame mouth portion of the flame mouth molded body and the small flame formed at the ignition flame mouth portion. The difference between the main flame and the small flame at the ignition flame mouth is made close to the heating flame to suppress uneven heating and ensure a uniform heating distribution and high heating efficiency, while preventing interference between the main flame and the small flame. The purpose is to maintain a good combustion state by preventing the backfire phenomenon during fire extinguishing.

  In order to achieve the above object, a burner according to the present invention comprises a main flame mouth portion for forming a main flame and an ignition flame mouth portion for forming a small flame at the outer peripheral portion of a substantially annular flame mouth molded body. In the vicinity of the ignition flame opening part, an irregular arrangement flame mouth part opened so that a part of the main flame is close to the ignition flame opening part is provided, and the outlet shape of the ignition flame opening is a flame with respect to the flame opening width. The ratio of the mouth height is 1.0 or less, and the flow length of the ignition flame port is 3.0 times or more of the flame mouth width.

  As a result, even if the flame formed at the ignition flame mouth is a small flame, the main flame mouth near the ignition flame mouth is constituted by an irregular arrangement flame mouth, and a part of the main flame is the ignition flame mouth. Because it is set in the opening direction so as to approach the small flame formed by, when heating a pan, etc., it realizes a nearly uniform heating distribution by suppressing the decrease in the heating distribution at the ignition flame opening, At the same time, high heating efficiency can be ensured by suppressing uneven heat transfer to the pan.

  Furthermore, the irregular arrangement flame opening is an opening direction in which a part of the main flame approaches the small flame of the ignition flame opening, and is set in a direction to prevent interference between the part of the main flame and the small flame. Therefore, even after a long period of combustion, the temperature of the ignition flame port does not rise, the occurrence of yellow flame can be prevented, and a good combustion state can be realized. Further, the exit shape of the ignition flame is such that the ratio of the flame height to the flame width is 1.0 or less, the flow path length of the ignition flame is set to 3.0 times or more of the flame width, and the extinction distance is set. Therefore, even if there is a relation of combustion speed> mixed gas flow speed during extinguishing and a phenomenon of backfire in the burner body occurs, the combustion in which the fire type flows back to the burner body side in the ignition flame channel Even if the velocity exceeds the mixed gas flow velocity and starts a backfire toward the inside of the burner main body, the flow path length is longer than the flame opening area defined by the flame opening width and the flame opening height. Since the flame type, which is approximately the same size as the flame opening area, receives the cooling action and the flame temperature for maintaining the combustion state decreases, the combustion cannot be maintained and the flame is extinguished, so there is a fire type in the burner body. There is no phenomenon of flashback and the main flame mouth, irregular arrangement flame mouth, point in the burner body at the same time Since the instantaneous combustion phenomenon of the mixed gas that has remained without being ejected from the flame opening no longer occurs, it does not involve a phenomenon of extinguishing the fire with a large explosion sound, giving the user a sense of fear, etc. Therefore, a good combustion state can be realized, and a cooker that can be used comfortably can be realized.

  The burner according to the present invention and a stove using the burner realize a substantially uniform heating distribution by suppressing a decrease in the heating distribution at the ignition flame opening even if the flame formed at the ignition flame opening is a small flame. At the same time, high heating efficiency can be ensured by suppressing uneven heat transfer to the pan. In addition, the ignition flame opening does not rise in temperature even after a long period of combustion, and yellow flames can be prevented from being generated and a good combustion state can be realized. Furthermore, since there is no combustion accompanied by explosive noise during ignition and extinguishing, it is possible to provide a stove that can be used comfortably without raising anxiety.

  1st invention is equipped with the main flame mouth part which forms a main flame in the outer peripheral part of a substantially annular flame mouth molded body, and the ignition flame mouth part which forms a small flame, The ignition flame mouth part vicinity among main flame mouth parts Is provided with an irregular arrangement flame mouth portion opened so that a part of the main flame approaches the ignition flame mouth portion, and the exit shape of the ignition flame mouth has a ratio of the flame mouth height to the flame mouth width of 1.0. In the following, when the flame length is set to 3.0 or more times the flame opening width and the flame extinguishing distance is ensured, the heating distribution at the ignition flame port is reduced when the pan is heated. High heating efficiency can be ensured by reducing the heat transfer unevenness to the pan at the same time. Furthermore, the opening direction of the irregular arrangement flame mouth portion is set to a direction in which a part of the main flame is brought close to the small flame of the ignition flame mouth portion and interference between the part of the main flame and the small flame is prevented. Therefore, even after a long period of combustion, the temperature of the ignition flame opening does not increase, and yellow flames due to insufficient primary air can be prevented and a good combustion state can be realized.

  Furthermore, the outlet shape of the ignition flame is such that the ratio of the flame height to the flame mouth width is 1.0 or less, and the flow length of the ignition flame is set to 3.0 times or more of the flame mouth width. Even if a phenomenon occurs where the combustion speed> mixed gas flow rate during fire extinguishment and a backfire occurs in the burner body, the combustion speed at which the fire type flows back to the burner body side in the ignition flame channel is the mixed gas flow rate. Even if the flame is widened compared to the flame opening area that can be determined by the flame width and the flame opening height, Since the flame temperature for maintaining the combustion state is reduced due to the cooling effect of the same size as the flame type, the flame temperature will decrease and the combustion will not be continued and extinguish the flame. Phenomenon does not occur at the same time, from the main flame mouth, irregular arrangement flame mouth, ignition flame mouth in the burner body Since there is no instantaneous combustion phenomenon of the mixed gas remaining without taking out, there is no phenomenon of extinguishing with a large explosion sound, so there is no fear of the user and good combustion The cooker which can implement | achieve a state and can be used comfortably can be implement | achieved.

  In particular, the second invention is a main flame mouth part of the burner of the first invention, a radial arrangement flame mouth part opening in the circumferential direction starting from the center of the annular part of the flame mouth molded body, and an ignition flame mouth part By providing an irregular arrangement flame mouth that opens in the circumferential direction by providing a base point in the opening direction on an extension line that passes through the center of the annular portion, in the irregular arrangement flame mouth that also opens in the vicinity of the ignition flame opening portion, The main flame approaches the small flame at the ignition flame opening and suppresses the decrease in the heating distribution at the ignition flame opening, while preventing interference between the main flame and the small flame, so even after a long time of combustion. It is possible to prevent the occurrence of yellow flame due to a shortage of primary air and achieve a good combustion state without causing the ignition flame port portion to be heated. Further, even in this case, since the flame extinguishing distance is set in the same manner as the first invention, the ignition flame opening portion has a relationship of combustion speed> mixed gas flow rate during extinguishing, and a phenomenon of backfire in the burner body occurs. However, even if the combustion speed at which the fire type flows back to the burner body in the ignition flame flow path exceeds the mixed gas flow velocity and starts a backfire toward the burner body, the flame width and height The flame temperature for maintaining the combustion state by the cooling action of the fire type, which is approximately the same size as the flame opening area, on the flow path wall because the flow path length is longer than the completed flame area. As the flame is reduced and the combustion cannot be continued, the flame is extinguished, so there is no fire in the burner body, and the phenomenon of backfire does not occur, and at the same time, the main flame mouth, irregular array flame mouth, Instantaneous combustion of the mixed gas remaining without jetting from the flame mouth Because elephants are no longer produced, there is no phenomenon of extinguishing fire with a large explosion sounding, so there is no fear of the user etc. and a good burning state can be realized and cooking that can be used comfortably Can be realized.

  In the third invention, in particular, in the irregular arrangement flame mouth portion of the burner shown in the second invention, the anomalous arrangement flame mouth opening at a position close to the ignition flame mouth portion is located at the center of the annular portion from the ignition flame mouth portion. By providing a base point in the opening direction on the extended line that passes through and a position far from the center of the annular part, and opening it in the circumferential direction, not only a good combustion state is realized, but also a radial arrangement flame mouth part From the anomalous arrangement flame mouth near the ignition flame opening to the anomalous arrangement flame mouth near the ignition flame mouth, the main flame can approach the small flame of the ignition flame mouth by gradually changing the flame direction, An almost uniform heating distribution can be realized.

  Further, when the base point in the opening direction of the irregular arrangement flame opening that opens at a position close to the ignition flame opening is an infinite position on the extension line passing through the center of the annular portion from the ignition flame opening, the above irregular The opening direction of the arrangement flame mouth is substantially parallel to the opening direction of the ignition flame mouth, and in this case as well, interference with the small flame at the ignition flame mouth portion can be prevented. Further, in this case as well, since the configuration of the ignition flame is the same as that of the first invention, the fire extinguishing distance is not present, and there is no phenomenon of extinguishing with a large explosion sound at the time of extinction. It is possible to realize a good combustion state without giving a feeling of fear and to realize a cooker that can be used comfortably.

  The fourth invention is a burner flame mouth molded body according to any one of the first to third inventions, particularly comprising an outer peripheral inclined surface whose outer peripheral portion is downwardly inclined downward, and a main flame opening is opened on the outer peripheral inclined surface. By doing so, the flame tends to be upward along the inclined surface, so that high heating efficiency can be ensured. Further, in this case as well, since the configuration of the ignition flame is the same as that of the first invention, the fire extinguishing distance is not present, and there is no phenomenon of extinguishing with a large explosion sound at the time of extinction. It is possible to realize a good combustion state without giving a feeling of fear and to realize a cooker that can be used comfortably.

  In the fifth aspect of the invention, in particular, on the upper surface of the flame mouth molded body of the burner of the first to fourth aspects, an inner peripheral inclined surface that is inclined downward toward the center of the annular portion is formed. The air flowing in from the center becomes an updraft along the inner peripheral inclined surface and diffuses into the flame, promoting combustion and ensuring high thermal efficiency. Further, in this case as well, since the configuration of the ignition flame is the same as that of the first invention, the fire extinguishing distance is not present, and there is no phenomenon of extinguishing with a large explosion sound at the time of extinction. It is possible to realize a good combustion state without giving a feeling of fear and to realize a cooker that can be used comfortably.

  In particular, the sixth aspect of the present invention is the burner molded body of the burner of the first to fifth inventions, and a boiled shield is provided above the flame molded body through a gap so that the inflow from the center of the annular portion The air that collides with the broth shield diffuses uniformly into the flame, promotes combustion, shortens the flame length, ensures high heating efficiency, and at the same time prevents the broth from falling into the flame mouth it can. Further, in this case as well, since the configuration of the ignition flame is the same as that of the first invention, the fire extinguishing distance is not present, and there is no phenomenon of extinguishing with a large explosion sound at the time of extinction. It is possible to realize a good combustion state without giving a feeling of fear and to realize a cooker that can be used comfortably.

  According to a seventh aspect of the present invention, the burner according to any one of the first to sixth aspects of the present invention is used, and the tip of the mounting portion is provided with the five virtues corresponding to the ignition flame opening portion. Since it corresponds to a small flame at the mouth, it is possible to suppress the rise of CO, and at the same time, to realize a uniform heating distribution and high heating efficiency to ensure energy saving. Further, in this case as well, since the configuration of the ignition flame is the same as that of the first invention, the fire extinguishing distance is not present, and there is no phenomenon of extinguishing with a large explosion sound at the time of extinction. It is possible to realize a good combustion state without giving a feeling of fear and to realize a cooker that can be used comfortably.

  Embodiments of the present invention will be described below with reference to the drawings. Note that the present invention is not limited to the embodiment.

(Embodiment 1)
FIG. 1 is a bottom view of a flame mouth molded body of a burner according to a first embodiment of the present invention, FIG. 2 is a side view showing an appearance of the flame mouth molded body from an ignition flame port, and FIG. It is sectional drawing of the whole.

  In the figure, reference numeral 1 denotes a substantially annular flame port molded body formed into a substantially frustoconical shape by brass forging, aluminum ingot casting, ceramic molding, or the like. Thus, an air passage 4 penetrating vertically is configured. In addition, the rectangular surface on the outer periphery of the flame port molded body 1 constitutes an outer peripheral inclined surface 5 that is inclined downward in the outer circumferential direction from the upper part to the lower part, while the upper surface of the flame port molded body 1 is directed toward the center of the annular portion 2. An inner peripheral inclined surface 6 inclined downward is configured.

  In addition, the outer peripheral inclined surface 5 and the lower surface portion of the flame mouth molded body 1 are provided with a number of groove-like flame openings opening in the circumferential direction, which are aggregates of flame openings having a large opening area, A main flame mouth portion 8 that forms a flame 7, a fire transfer flame mouth portion 9 that is adjacent to and separated from the main flame mouth portion 8 and has a small opening area, and an ignition flame mouth 10 that forms a small flame are used for holding flames. It is composed of an ignition flame port 12 provided between the flame ports 11. The main flame mouth 8 is adjacent to both sides of the ignition flame mouth 12 and a radial arrangement flame mouth 13 that opens radially and obliquely upward with the center O of the annular part 2 of the flame mouth molded body 1 as the base point of the opening, And it is comprised by the irregular arrangement | sequence flame mouth part 14 which does not make the center O of the annular part 2 the base point of an opening direction.

  Further, the anomalous arrangement flame mouth portion 14 is located on the extension line passing through the center O of the annular portion 2 from the ignition flame mouth portion 12 and from the center O of the annular portion 2 as the anomaly arrangement flame mouth 15 closest to the ignition flame mouth portion 12. The far position X is opened in the circumferential direction with the base point in the opening direction. That is, the irregular arrangement flame mouth portion 14 extends from the irregular arrangement flame mouth 16 farthest to the ignition flame mouth portion 12 to the anomaly arrangement flame mouth 15 closest to the ignition flame mouth portion 12, and on the extended line passing through the center O of the annular portion 2 from the ignition flame mouth portion 12. In addition, the base point in the opening direction is moved from Y to X.

  Further, in the flame mouth molded body 1, the rectifying portion 17 having an inverted truncated cone shape that extends from the lower part to the vicinity of the base part of the main flame mouth part 8 and has an upward inclination angle larger than the upward inclination angle of the main flame mouth part 8. Is provided.

  Further, the flame port molded body 1 covers the ignition flame port portion 12 provided with one flame holding flame port 11 on both sides of the ignition flame port 10 on the upper side, and other parts of the flame port molded body 1 Compared to the above, an ignition flame covering portion 18 projecting in the outer diameter direction is provided, and a downward convex shape is provided at a position away from the ignition flame port 10 on the ignition flame opening 10 side of the ignition flame covering portion 18. The discharge electrode 19 is provided, and the ignition electrode 20 is configured at a position spaced apart from the discharge electrode 19 by a certain distance.

  Further, the outlet shapes of the ignition flame mouth 10 and the flame holding flame mouth 11 are such that the ratio of the flame mouth height to the flame mouth width is 1.0 or less, and the flow length of the ignition flame mouth is 3 of the flame mouth width. It is configured to be 0 times or more.

  Further, a boiled shield 21 having an outer diameter equal to or larger than the outer diameter of the flame mouth molded body 1 by about 1 to 2 mm is integrally formed on the upper surface of the flame mouth molded body 1 through a gap 22 communicating with the air passage 4. Is provided.

  On the other hand, the burner body 23 made of a heat-resistant metal such as stainless steel integrally includes a fuel premixed gas mixing tube 24 and a substantially annular diffusion chamber 27 formed by an inner peripheral wall 25 and an outer peripheral wall 26 penetrating vertically. The outer peripheral wall 26 of the diffusion chamber 27 is formed on the inner peripheral wall 25 of the opening cylinder 3 of the flame outlet molded body 1 and the burner body 23, and the lower surface side of the outer peripheral portion of the flame outlet molded body 1 and the lower surface side of the ignition flame mouth portion 12. It is almost in close contact with the flange portion located at the top.

  In this manner, the burner 28 is configured by fitting the flame-molded body 1 integrated with the broth shield 21 on the burner main body 23.

  Next, the operation and action will be described. The premixed gas is formed by mixing the fuel gas ejected into the mixing tube 24 and the premixed air (primary air) sucked at the same time, and then the diffusion chamber 27. It diffuses uniformly inside and disperses in accordance with the opening area of the main flame opening 8, the fire transfer flame opening 9, and the ignition flame opening 12, but the upward diffusion rectification action along the upward inclination angle of the rectification unit 17 Therefore, when ejecting from the main flame opening 8, it is ejected with an upward outflow tendency with respect to the upward inclination angle of the main flame opening 8. After that, when an ignition operation is performed by any ignition operation, a small flame 29 is formed in the ignition flame port 10 by discharging from the ignition electrode 20 toward the discharge electrode 19, and the auxiliary flames of the flame holding flame ports 11 on both sides are formed. The main flame 7 is transferred to the main flame opening 8 through 30 and an upward main flame 7 is formed.

  At this point, the flame mouth portion 12 becomes a small flame as a whole as compared with the main flame 7. Of the main flame mouth portion 8, a part of the main flame 7 is close to both sides of the ignition flame mouth portion 12. Since the anomalous arrangement flame mouth portion 14 is set so that the opening direction is set so as to approach the small flame 29, interference between the main flame 7 and the small flame 29 is prevented, and the generation of CO and yellow flame is prevented. While ensuring a small favorable combustion state, when heating a pan etc., the fall of the heating distribution in the ignition flame part 12 can be suppressed.

  In particular, the irregular arrangement flame mouth 15 that is the furthest from the ignition flame mouth portion 12 reaches the anomaly arrangement flame mouth 15 that is closest to the ignition flame mouth portion 12, and opens from Y to X on the extension line that passes through the center O of the annular portion 2. By moving the direction base point, the direction of the main flame 7 can be changed gently, and the main flame 7 can be brought close to the small flame 29, so that a substantially uniform heating distribution can be realized as a whole. it can.

  On the other hand, the first secondary air flow 28 flowing in as an updraft from the air passage 4 is formed along the inner peripheral inclined surface 6 of the flame mouth molded body 1 between the broth shield 21 and the upper surface of the flame mouth molded body 1. It passes through the gap 22 between them, becomes an ascending air current, reaches directly above the main flame opening 8, and effectively diffuses into the main flame 7. At the same time, the second secondary air flow 29 diffuses from the periphery of the outer peripheral wall 26 of the flame-molded body 1 into the main flame 7. Therefore, the main flame 7 is sandwiched between the first secondary air flow 28 and the second secondary air flow 29, and combustion is accelerated and the flame is shortened.

  Further, since the flame transfer flame opening 9 is provided in the flame-molded body 1, the flame in this region becomes a small-scale flame for securing the flame transfer, and the adjacent main flames 7 interfere with each other. And the main flame 7 with a shorter flame can be realized.

  Further, by making the upward inclination angle of the rectifying unit 17 larger than the upward inclination angle of the main flame opening 8, the jet angle of the premixed gas can be made upward, so that the flame opening can be made shallow. In addition, the workability in configuring the flame groove can be facilitated.

  Further, when the small flame 29 is formed by ignition when the burner 28 is ignited, the fuel gas is ejected into the mixing tube 24 while the mixing tube 24 is replaced with air. The fuel gas concentration of the premixed gas formed by mixing the fuel gas ejected into the mixing tube 24 and the premixed air (primary air) sucked at the same time is in a lean state as compared with the steady state. A small flame 29 is formed by ignition and supplied to the ignition flame 10. At this time, the ignition phenomenon in the lean state is ignited at the moment when the fuel gas concentration of the premixed gas enters the combustible range, but the process in which the fuel gas concentration of the premixed gas transitions from the lean state to the rich state Will be ignited. Thereafter, the transition to the steady state is continued and combustion is continued. The combustion behavior immediately after ignition is that the combustion speed of the premixed gas changes with the fuel gas concentration in the premixed gas, so that the combustion speed at the steady state <the combustion speed at the time of ignition <the transition from the ignition to the steady state. Since the state change occurs due to the combustion speed at the time, the small flame 29 becomes a fire type with respect to the premixed gas ejected from the ignition flame port 10, and the premixed gas ejection speed in the ignition flame port 10 <The combustion speed relationship when the transition from the ignition of the premixed gas to the steady state is established, and the combustion transitions in the ignition nozzle 10.

  However, the outlet shape of the ignition nozzle 10 and the ignition nozzle 10 and the flame holder 11 is such that the ratio of the flame mouth height to the flame mouth width is 1.0 or less, and the flow path of the ignition flame mouth 10 is Since the length (the direction in which the premixed gas flows) is configured to be 3.0 times or more the flame width, the relationship of the premixed gas ejection speed <the premixed gas combustion speed within the ignition nozzle 10 is Even if a reverse flash phenomenon occurs in which the combustion flame transitions in the ignition flame port 10, the combustion flame is ignited because the size of the flame is about the product of the flame width and the flame height. The heat transfer phenomenon occurs between the flow passage walls constituting the flow passage in the flame port 10 and the fire extinguishing phenomenon occurs to extinguish the flame. Accordingly, since the ignition port 10 has a configuration in which the extinguishing distance is ensured, a back-fire phenomenon that reaches the inside of the diffusion chamber 27 can be prevented. Therefore, combustion accompanied by explosive sound in the diffusion chamber 27 due to back-fire. Since it does not occur, it can be used comfortably without raising anxiety. In addition, when the fire extinguishes, the premixed gas injection speed <the premixed gas combustion speed relationship in the steady state is established and the direction is generated. Because there is no combustion with explosive sound in the diffusion chamber 27 caused by the above, it can be used comfortably without raising anxiety.

(Embodiment 2)
FIG. 4 is a cross-sectional view of a stove according to the second embodiment of the present invention, and FIG. 5 is a diagram showing a positional relationship between a mounting portion of the five victories of the stove and a burner. In addition, the thing of the same code | symbol as Example 1 has the same structure, and abbreviate | omits description.

  In the figure, the stove main body 41 is dropped into the opening of the counter 42 and placed on the peripheral edge of the opening of the counter 42. The top plate 43 is placed on the stove main body 41 so as to cover the stove main body 41, and the peripheral portion of the top plate 43 is in contact with the counter 42. The top plate 43 has an opening 46 in the form of a flange 45 provided with a substantially circular stepped portion 44. The flange 45 has a burner opening 47 in the center and a large number of long sides on the peripheral side surface. A juice tray 49 having a hole-like air port 48 is placed, and the burner opening 47 faces the burner 28 in the first embodiment. The air port 48 may be provided on the side surface of the step pushing portion 44 of the top plate 43.

  On the other hand, the virtues 50 have a configuration in which a plurality of mounting portions 52 are arranged in a frame body 51 whose inner periphery is inclined downward, with the tips facing the center, and in particular, the tip of the mounting portion 52 is the ignition flame opening 12. The frame body 51 is placed so as to shield the step pushing portion 44 and the air port 48 of the juice receiving tray 49 from above.

  Next, the operation and action will be described. The premixed gas supplied to the burner 28 is ignited by some ignition means (not shown) to form an upward main flame 53. At this time, the first secondary air flow 28 that flows in as an updraft from the air passage 4 passes through the gap 22 between the broth shield 21 and the flame-molded body 1 and has a tendency of an updraft while maintaining the main flame. 53 effectively diffuse. At the same time, the air flowing in through the air port 48 is rectified in its direction by the downward slope of the inner periphery of the frame 51 of the virtues 50 while cooling the lower surface portion of the top plate 43 and flows so as to lick the bottom surface of the juice tray 49. It diffuses into the main flame 53 as the second secondary air flow 54 while suppressing the temperature rise of the juice receiving tray 49. Accordingly, the main flame 53 is sandwiched between the first secondary air flow 36 and the second secondary air flow 54, and is formed as an upward flame that is accelerated by combustion and shortened.

  Therefore, a uniform heating distribution and high thermal efficiency are achieved to ensure energy saving, and the boiled soup can be prevented from entering the burner 28 and stable combustion air can be supplied. Can be provided.

  In addition, since the flame outlet for ignition 10 has a configuration in which the extinguishing distance is ensured at the time of stove ignition and extinguishing operation, it is possible to prevent a back-fire phenomenon reaching the inside of the diffusion chamber 27. Because there is no combustion with the explosive sound, it can be used comfortably without raising anxiety. In addition, when the fire extinguishes, the premixed gas ejection speed <the premixed gas combustion speed relationship in the steady state is established and the direction is generated. Since the combustion with explosive sound in the diffusion chamber 27 does not occur, it is possible to provide a stove that can be used comfortably without raising anxiety.

  As described above, according to the present invention, even if the flame formed at the ignition flame port is a small flame, the heating distribution at the ignition flame port is suppressed and a substantially uniform heating distribution is realized. At the same time, by suppressing uneven heat transfer to the pan, high heating efficiency can be secured, and the ignition flame port does not become hot even after prolonged combustion, and it is used for gas cooking utensils mainly composed of a stove be able to.

The bottom view of the flame-mouth molded object of the burner in the 1st Embodiment of this invention Side view showing appearance of flame burner molded body of same burner Cross section of the burner Sectional drawing of the stove in the 2nd Embodiment of this invention The figure which shows the positional relationship of the mounting part of five virtue of the same stove Partial sectional view showing a flame outlet arrangement surface of a flame mouth molding in a conventional burner

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Flame port molded object 2 Annular part 5 Outer peripheral inclined surface 6 Inner peripheral inclined surface 7 Main flame 8 Main flame port 10 Ignition flame port 12 Ignition flame port 13 Radiation arrangement flame port 14 Anomalous arrangement flame port 15 Ignition flame port Anomalous arrangement flame outlet closest to the part 21 Boiled juice shield 22 Gap 28 Burner 43 Top plate 46 Opening part 50 Gotoku 52 Place

Claims (7)

A main flame mouth portion for forming a main flame on an outer peripheral portion of a substantially annular flame mouth molded body, and an ignition flame mouth portion provided with a substantially rectangular ignition flame mouth, and the ignition flame mouth of the main flame mouth portion In the vicinity of the portion, an irregular arrangement flame mouth portion that is opened so that a part of the main flame approaches the ignition flame mouth portion, and the outlet shape of the ignition flame mouth is a ratio of the flame mouth height to the flame mouth width. Is a burner having a flow path length of the ignition flame port of 3.0 or more of the flame mouth width. The main flame mouth portion has a radial arrangement flame mouth portion that opens in the circumferential direction with the center of the annular portion of the flame mouth molded body as a base point, and a base point in the opening direction on an extension line that passes through the center of the annular portion from the ignition flame mouth portion. The burner according to claim 1, further comprising an irregular arrangement flame opening provided and opened in the circumferential direction. The anomalous arrangement flame opening part opens at a position farther from the center of the annular part on the extension line passing through the center of the annular part from the ignition flame part as the irregular arrangement flame opening that opens at a position closer to the ignition flame part. The burner according to claim 2, wherein a base point in the direction is provided to open in the circumferential direction. The burner molded body according to any one of claims 1 to 3, wherein the flame mouth molded body is constituted by an outer peripheral inclined surface whose outer peripheral portion is inclined downward and outward, and the main flame outlet portion is opened on the outer peripheral inclined surface. The burner according to any one of claims 1 to 4, wherein the upper surface of the flame mouth molded body is inclined downward toward the center of the annular portion to constitute an inner peripheral inclined surface. The burner according to any one of claims 1 to 5, wherein a broth shield is provided above the flame mouth molded body through a gap. A stove comprising the burner using the burner according to any one of claims 1 to 6 and having the tip of the mounting portion corresponding to the ignition flame opening.

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