JP4036183B2 - Burner - Google Patents

Description

  The present invention relates to a burner using gas, oil, or the like as fuel.

  Conventionally, this type of burner is disclosed in Patent Document 1. As shown in FIG. 8, a plurality of flame openings 83 are provided on the inner peripheral side of an annular tube 82 in which a mixing tube 81 is connected in a counter-clockwise direction in a substantially tangential direction. Is gradually reduced counterclockwise from the vicinity of the connecting portion with the mixing pipe 81, that is, from the start end 84, and has a minimum cross section at the end portion 85 of the annular pipe 82. Then, assuming that all of the premixed gas introduced from the mixing pipe 81 flows counterclockwise in the annular pipe 82 and ejects from the flame port 83, the ejection pressure of the premixed gas in the annular pipe 82 It is intended to make uniform.

Another conventional burner is disclosed in Patent Document 2. As shown in FIG. 9, a plurality of flame ports 93 are provided on the inner peripheral side of an annular tube 92 in which a mixing tube 91 is connected in a substantially tangential direction in the counterclockwise direction. The cross-sectional area of the pipe 92 is gradually reduced counterclockwise from the vicinity of the connecting portion with the mixing pipe 91, that is, the start end 94, and gradually reduced in the clockwise direction from the vicinity of the end portion 95 of the annular pipe 92. The minimum cross-sectional area of the annular tube 92 is closer to the end portion 95 of the annular tube 92 than the intermediate portion of the annular tube 92. Similarly, the pressure of the premixed gas in the annular tube 92 is made uniform at the same time. This is to ensure the compactness of the burner.
Japanese Utility Model Publication No. 6-40615 JP 2003-279209 A

  However, in the conventional configuration shown in Patent Document 1, there is a large amount of premixed gas flowing into the annular tube 82 at the start end portion 94 of the connecting portion of the mixing tube 81 and the annular tube 82, and the pressure inevitably increases. As a result, the amount of ejection from the vicinity of the flame outlet 83 increased, and as a result, a flame length phenomenon occurred counterclockwise in the inner circumferential direction, and the flame balance in the circumferential direction tended to be uneven. Therefore, it is difficult to obtain a stable combustion performance due to an increase in CO emission in a portion having a long flame length.

  On the other hand, in another conventional configuration disclosed in Patent Document 2, the premixed gas flows in the counterclockwise direction from the vicinity of the connecting portion with the mixing tube 91, that is, from the start end portion 94 of the annular tube 92, and the end of the annular tube 92. The premixed gas flows in clockwise from the portion 95, and the flame length corresponding to the portion where both premixed gases collide changes little by little, and the flame tends to partially blow off easily. there were. Accordingly, similarly, long and short flame lengths are generated, and it is difficult to obtain stable combustion performance.

  Furthermore, in any of the above conventional configurations, the flame distribution is made uniform only by the configuration of the cross-sectional shape of the annular pipes 82 and 92 itself. Therefore, the mixing pipe 81 and the end portion 85 of the annular pipe 82, the mixing At the end portion 95 of the pipe 91 and the annular pipe 92, a part of the premixed gas overflows into the mixing pipe 81 and the annular pipe 82 in the counterclockwise direction, and into the connecting portions of the mixing pipe 91 and the annular pipe 92, and the mixing pipe 81 and Turbulent flow and vortex flow are generated in the connecting portions of the annular pipe 82, the mixing pipe 91 and the annular pipe 92, and the suction resistance of the combustion air in the mixing pipes 81 and 91 is increased and becomes unstable. It was difficult to stabilize the flame length by causing the flame to intermittently lengthen and generate yellow flame. In addition, in order to change the maximum burnup specification of the burner, in particular, increase it, it is necessary to increase the amount of premixed gas. In the current configuration, not only the flame length becomes non-uniform, but also the premixed gas is mixed into the mixing tube. 81 and the annular pipe 82, and the tendency which overflowed in the connection part of each of the mixing pipe 91 and the annular pipe 92 increased. Therefore, in order to cope with an increase in the maximum combustion amount, etc., not only an increase in the area of the flame opening, but also an enlargement of the capacity and shape of the annular pipes 82 and 92 and the mixing pipes 81 and 91 themselves so as to enlarge the entire burner. Therefore, it is necessary to make a burner mold for each specification, and it is difficult to construct a compact burner.

  The present invention solves the above-mentioned conventional problems, can maintain a uniform flame balance and maintain stable combustion performance, and at the same time, even when the specification of the maximum burner combustion amount is changed, The object is to provide a compact burner that does not require modification of the mold of the tube or mixing tube.

In order to solve the conventional problems, a burner according to the present invention includes a mixing tube for introducing a premixed gas, and an annular tube having a plurality of flame ports on an inner peripheral surface, and the mixing tube is the annular tube. The rectifier is provided with a rectifier and a resistor inside the annular tube, and the rectifier is divided into an annular space on the inner peripheral side and the outer peripheral side, The space is communicated to allow the premixed gas to pass therethrough so that the flame distribution at the flame outlet is made uniform, and the resistor is provided in the annular space on the outer peripheral side, from the annular tube to the communicating portion between the mixing tube and the annular tube it is obtained so as to suppress the backflow of the premixed gas.

  As a result, the premixed gas flowing in from the mixing tube diffuses in the annular space on the outer peripheral side, passes through the rectifier and flows into the annular space on the inner peripheral side, and is rectified and ejected from the flame opening. At this time, the amount of the premixed gas ejected from each flame outlet can be made uniform simply by optimizing the opening area or shape of the rectifier. Further, if the rectifiers are multiplexed and the inside of the annular tube is divided into a plurality of annular spaces, the amount of ejection from the flame opening can be made even easier. In addition, most of the premixed gas enters the annular space on the inner peripheral side through the rectifier and is ejected from the flame opening, but part of the premixed gas flows through the annular space on the outer peripheral side and overflows into the communication portion between the mixing tube and the annular tube. However, since it is guided to the annular space on the inner circumference side through the rectifier by the resistor, and is similarly ejected from the flame outlet, turbulence and vortexing at the communicating part of the mixing tube and annular tube are almost Stable combustion air is sucked in the mixing tube without being generated. Also, even when increasing the maximum burner burn, it can be handled simply by changing the area of the flame opening, the opening area of the rectifier or its shape, and basically without changing the shape of the annular tube or mixing tube. In addition, turbulent flow and eddy flow are hardly generated at the communication portion between the mixing tube and the annular tube, and a uniform flame can be formed at the flame opening, and a combustion state with a stable flame length can be realized. As described above, by providing a resistor on the outer peripheral side of the annular tube and providing a rectifying body, a stable combustion air suction performance in the mixing tube is maintained, and a uniform flame balance and good combustion performance are ensured. In addition, even when increasing or decreasing the maximum combustion amount of the burner, it is possible to respond by simply changing the configuration of the rectifier, and it is not necessary to change the mold of the annular tube or the mixing tube itself, and a compact burner can be provided. it can.

  The burner of the present invention ensures a stable combustion air suction state in the mixing tube, can achieve a uniform flame balance and good combustion performance, and at the same time changes the specification to increase or decrease the maximum combustion amount of the burner. However, it is possible to provide a compact burner in which it is not necessary to change the mold of the annular tube or the mixing tube.

A first invention includes a mixing tube for introducing a premixed gas, and an annular tube having a plurality of flame ports on an inner peripheral surface, and the mixing tube is configured to communicate in a substantially tangential direction of the annular tube. A rectifier and a resistor are provided inside the annular tube, the rectifier separates the interior of the annular tube into an annular space on an inner peripheral side and an outer peripheral side, communicates the annular spaces, and passes a premixed gas. The resistance distribution is made uniform in the annular space on the outer peripheral side so as to suppress the backflow of the premixed gas from the annular tube to the communication portion between the mixing tube and the annular tube. It is a thing .

  Thereby, only by optimizing the configuration of the rectifier, the distribution of the premixed gas flow reaching the flame outlet can be made uniform, and the flame distribution at the flame mouth can be made uniform. At this time, a part of the premixed gas flows through the annular pipe and tries to overflow into the communication part between the mixing pipe and the annular pipe, but is pushed back by the resistor and guided to the inner peripheral side of the annular pipe through the rectifier. As a result, the turbulent flow and vortex flow hardly occur at the communicating part of the mixing tube and the annular tube, stable combustion air is sucked in the mixing tube, and the flame length is stable. The state can be realized. Furthermore, even when increasing or decreasing the maximum combustion amount of the burner, it is not necessary to change the mold of the annular tube or the mixing tube itself by providing a resistor on the outer peripheral side in the annular tube and changing the configuration of the rectifier, It is possible to provide a compact burner capable of maintaining a uniform combustion balance and good combustion performance at the same time while maintaining a stable combustion air suction performance in the mixing tube.

Further , the annular tube is separated by a rectifier into an annular space on the inner peripheral side and an annular space on the outer peripheral side , so that the premixed gas flowing in from the mixing tube diffuses into the annular space on the outer peripheral side , Passing through and flowing into the annular space on the inner peripheral side, the air is rectified and ejected from the flame opening. At the same time, it is possible to prevent the premixed gas from overflowing to the communicating portion of the mixing tube and the annular tube, and to maintain stable combustion air suction performance in the mixing tube. At this time, for example, even when increasing or decreasing the maximum combustion amount of the burner, in order to equalize the amount of premixed gas ejected from each flame port, it is only necessary to optimize the opening area or opening shape of the rectifier, There is no need to change the shape of the annular tube or mixing tube. Therefore, there is no need to change the mold of the annular tube or the mixing tube itself, including when increasing the maximum combustion amount of the burner, maintaining a stable combustion air suction performance in the mixing tube, and a uniform flame balance And a compact burner capable of ensuring good combustion performance at the same time.

The second invention is the first invention, in particular, in which a plurality of rectifiers are provided so as to separate the inside of the annular tube into a plurality of annular spaces, the annular spaces are communicated with each other through the rectifiers, and the resistors are arranged on the outer peripheral side. By providing the annular space, it is possible to make the flame uniform at the flame opening even more easily by dividing the inside of the annular tube into a plurality of annular spaces by multiplexing the rectifiers.

The third invention is the first invention, in particular, because the resistor is provided across the annular space on the outer peripheral side, so that it becomes almost perpendicular to the flow of the premixed gas flowing in the annular space on the outer peripheral side. The flow of the premixed gas can be effectively separated and guided to the annular space on the inner peripheral side.

The fourth invention is the invention according to any one of the first to third , particularly, wherein the annular tube is configured by fitting the upper surface side and the lower surface side, and the rectifier and the resistor are sandwiched between the upper and lower surfaces of the annular tube. Fixed together. For example, a groove-shaped convex portion is provided on the upper surface of the annular tube, a groove-shaped concave portion is provided on the lower surface of the annular tube, and the upper ends of the rectifier and the resistor are fitted to the groove-shaped convex portion. If the lower end of the rectifier and the resistor are fitted to each other, the leakage of the premixed gas from the upper and lower sides of the rectifier is minimized, and at the same time, the position of the rectifier does not move horizontally within the annular tube. Can be.

According to a fifth aspect of the invention, in particular, in the fourth aspect of the invention, the fitting portion between the annular tube and the rectifying body is provided with an adapting portion for preventing the rectifying body from rotating in the circumferential direction and fixing it. For example, at least one of the groove-shaped convex portion and the groove-shaped concave portion of the annular tube is provided with a discontinuous portion of the groove-shaped portion, and the rectifier is provided with a conforming portion with the discontinuous portion of the groove-shaped portion. When the discontinuous portion and the matching portion of the rectifying body are fitted, the leakage of the premixed gas from the upper and lower sides of the rectifying body is minimized, and at the same time, the divided body is positioned in the horizontal direction and the rotational direction inside the annular pipe. Positioning can be done easily so as not to shift.

(Embodiment 1)
FIG. 1 is a top view of a burner according to the first embodiment of the present invention, FIG. 2 is a cross-sectional view taken along line AA of FIG. 1 in the same embodiment, and FIGS. The top view, side view, and FIGS. 4 (a) and 4 (b) of the rectifying body and the resistor in the same embodiment are developed views of the rectifying body and the resistor in the same embodiment, the drawing die arrangement diagram, FIG. It is an expanded sectional view of the BB line of Drawing 1 in the embodiment.

  In FIG. 1, FIG. 2, FIG. 3 (a) (b), FIG. 4 (a) (b) and FIG. A sheet metal material having a thickness of 0.5 to 1 mm that is excellent in heat and corrosion resistance, such as stainless steel (in the case of the present embodiment, 0.5 to 0.6 mm) is press-molded. A mixing tube 3 for suction is communicated in a substantially tangential direction of the annular tube 2. The annular tube 2 and the mixing tube 3 are formed by fitting a bottom plate 5 having an annular inner periphery in the same manner as the flame port plate 4 having an annular inner periphery, and the flame port plate 4 has an upper portion on the inner circumferential side of about 75 °. An annular inclined surface 6 that is inclined upwards to some extent, an annular groove-like convex portion 7 is formed on the upper surface portion, and an inner peripheral flange portion 8 is formed on the inner peripheral portion below the inclined surface 6. Further, the inclined surface 6 is provided with a slit-shaped flame opening 9 that is vertically long and has a slit width of about 0.55 to 0.65 mm.

  On the other hand, the bottom plate 5 has a shape corresponding to the flame mouth plate 4, and a substantially annular groove in which a part of the discontinuous portion 10 is formed at a position corresponding to a position directly below the groove-like convex portion 7 on the lower surface. A concave portion 11 is formed. Further, the outer peripheral portion of the burner 1 is covered and fitted with an outer peripheral fitting portion 12, and the inner peripheral portion constitutes an inner peripheral fitting portion 13 inclined obliquely downward, and the periphery of the flame port plate 4 is viewed from the lower side. The cover is fitted.

  On the other hand, inside the annular tube 2, a cylindrical shape in which a plurality of small holes 14 are distributed and arranged in a fixed arrangement between the groove-like convex portion 7 and the groove-like concave portion 11. The rectifying body 16 is fitted. That is, the rectifying body 16 is fitted and fixed between the flame port plate 4 (upper surface side) and the bottom plate 5 (lower surface side) inside the annular tube 2. Further, the rectifying body 16 is formed in a state in which the plate material is expanded and the both ends are bent to form a resistor 17, and the resistor 17 is combined and molded into an annular shape, so that the rectifying body 16 and the resistor 17 are finally formed. Is integrally molded. Further, the rectifying body 16 is provided with a conforming portion 18 having a shape corresponding to the discontinuous portion 10 of the groove-shaped recess 11, and the discontinuous portion 10 of the groove-shaped recess 11 and the conforming portion 18 of the rectifying body 16. And the upper and lower ends of the resistor 17 are fitted into the groove-like convex part 7 and the groove-like concave part 11, and the outer peripheral fitting part 12 and the inner peripheral fitting part 13 are finally formed. The burner 1 is configured, and the inside of the annular tube 2 is separated by an rectifier 16 into an annular space 19 on the outer peripheral side and an annular space 20 on the inner peripheral side. At this time, the resistor 16 is provided in the communicating portion of the mixing tube 3 and the annular tube 2 or in the annular tube 2 in the vicinity thereof, at a position close to the mixing tube 3 side. On the other hand, the slit-shaped flame opening 9 is provided at a certain distance from the upper end of the inclined surface 6, and a short slit flame composed of short slits 23 is provided between the long slit flame groups 22 composed of long slits 21. It is the structure arrange | positioned combining the mouth group 24, Between the slit-shaped flame mouth part 9 and the inner periphery fitting part 13, the flameless mouth area | region 25 of predetermined width from the lower end part of the long slit flame mouth group 22 is provided. Is provided.

  About the burner 1 comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  First, when the premixed gas is introduced into the burner 1 through the mixing tube 3 as indicated by the arrows, most of the premixed gas flows counterclockwise into the annular space 19 on the outer peripheral side of the annular tube 2 and flows into the rectifier 16. It flows into the annular space 20 on the inner peripheral side through the opening 15 and is uniformly ejected from the slit-shaped flame opening 9. A part of the premixed gas flows in the annular space 19 on the outer peripheral side in the counterclockwise direction and tries to overflow into the communicating portion between the mixing tube 3 and the annular tube 2, but is pushed back by the resistor 17 and is adjusted. The fluid 16 is guided to the inner peripheral side of the annular tube 2 through the opening 15 and is ejected from the slit-shaped flame opening 9, and turbulence and vortexing in the communicating portion of the mixing tube 3 and the annular tube 2 are hardly caused. Stable combustion air is sucked in the mixing tube 1 without being generated, and a uniform premixed gas having a stable combustion air amount ratio is ejected from the slit-shaped flame opening 9. And it is ignited by some ignition means, and forms the flame which was uniform toward the center and the flame length was stable. At this time, since the slit-shaped flame opening 9 is formed of a thin slit having a slit width of about 0.55 to 0.65 mm, it is higher than 40 to 50% of the primary air ratio normally set by a stove burner or the like. Even with a primary air ratio (for example, 60 to 80%), it is difficult to backfire. Incidentally, the burner 1 is made of a stainless steel plate having excellent heat and corrosion resistance. Can be pressed in the range of 0.8 to 1.2 times the plate thickness, and the degree of freedom in selecting the flame shape can be expanded by the plate thickness. For this reason, it is easy to optimize the plate thickness of the burner 1 and the slit width of the slit-shaped flame opening 7 even in the case of a fuel having a high combustion speed such as a mixture of hydrogen and air. In the case of the present embodiment, a stainless steel plate having a thickness of 0.5 to 0.6 mm is used, and the primary air ratio is set to 65 to 70%. Thus, since the premixed gas with a high primary air ratio can be introduced uniformly, the slit-like flame opening 9 of the burner 1 can form a uniform and short flame toward the center.

  Moreover, since the rectifying body 16 forms the opening 15 with a constant arrangement distribution of the plurality of small holes 14, it corresponds to a specification change such as fine adjustment of the flame distribution or increase of the maximum combustion amount of the burner 1. However, it can be handled by increasing or decreasing the small holes 14. For example, as shown in FIG. 4B, the small holes 14 can be formed by punching with a large number of pin molds and receiving molds, and the small holes 14 can be formed according to the flame distribution state. The state of the opening portion 15 of the rectifier 16 can be easily controlled by controlling the amount of the premixed gas to be passed, such as by adding or removing pins, that is, by opening the black circle 26 and reducing the small holes 14. Can be optimized. Therefore, basically, there is no need to change the mold such as enlargement of the annular tube 2 or the mixing tube 3. The rectifier 16 and the resistor 17 are fitted from above and below by the groove-shaped convex portion 7 on the upper surface of the annular tube 2 and the groove-shaped concave portion 11 on the lower surface, and at the same time, the groove-shaped concave portion 11 is discontinuous. By fitting the fitting portion 18 of the rectifying body 16 with the portion 10, leakage of the premixed gas from the upper and lower sides of the rectifying body 16 is minimized, and at the same time, the rectifying body 16 and the resistor 17 are formed inside the annular pipe 2. The position can be securely fixed so that the position does not move in the horizontal direction and the rotational direction.

  As described above, a stable combustion air suction state in the mixing tube 3 is ensured by the resistor 17, and a uniform flame balance and stable combustion performance can be secured simultaneously by the rectifier 16, and the maximum combustion amount of the burner 1 Therefore, it is possible to provide a compact burner 1 that can cope with a change in specifications such as increase / decrease of the shape without changing the outer shape of the annular tube 2 or the mixing tube 3.

(Embodiment 2)
FIG. 6 is a top view of the burner according to the second embodiment of the present invention, and FIG. 7 is a cross-sectional view taken along the line CC of FIG. 6 in the same embodiment.

  7 and 8, the difference from the first embodiment is that in the burner 30, the inside of the annular tube 31 is sequentially divided into an inner annular space 32, an intermediate annular space 33, and an outer annular space 34. Therefore, the inner side rectifier 35 and the outer side rectifier 36 are provided in a substantially concentric shaft shape, and the annular spaces 32, 33, 34 are formed through the opening 37 of the rectifier 35 and the opening 38 of the rectifier 36. The rectifier 35 is positioned by a groove-shaped convex portion 39 on the inner peripheral side and a groove-shaped concave portion 40 on the inner peripheral side, and the rectifier 36 is formed in a groove-shaped convex portion 41 on the outer peripheral side and a groove shape on the outer peripheral side. In addition, the rectifying body 36 is formed in a state in which the plate member is unfolded and both ends thereof are bent to form a resistor 43, and the resistor 43 is molded into an annular shape. The rectifier 36 and the resistor 43 are integrally molded.

  Note that components having the same reference numerals as those in Embodiment 1 have the same structure, and description thereof is omitted.

  About the burner comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  By providing the inner peripheral side rectifying body 35 and the outer peripheral side rectifying body 36 in a substantially concentric shaft shape, premixing from the opening 38 of the outer peripheral side rectifying body 36 to the opening 37 of the inner peripheral side rectifying body 35 is performed. As the gas passes, the flow of the premixed gas is rectified in two stages, and the distribution of the premixed gas up to the slit-shaped flame mouth 9 is further uniformed. The uniform flame distribution is further facilitated. This can be further multiplexed depending on the cross-sectional width of the annular tube 31. In addition, some premixed gas flows in the annular space 34 on the outer peripheral side in a counterclockwise direction and tries to overflow into the communication portion between the mixing tube 3 and the annular tube 31, but is pushed back by the resistor 43 and is adjusted. It is guided to the annular space 32 on the inner peripheral side of the annular tube 31 through the opening 37 of the fluid 35 and the opening 38 of the rectifier 36, and is ejected from the slit-shaped flame opening 9. At this time, turbulent flow and vortex flow hardly occur in the communicating portion of the mixing tube 3 and the annular tube 31, stable combustion air is sucked in the mixing tube 3, and the combustion air amount ratio is stable and uniform. Thus, a premixed gas is ejected from the slit-shaped flame opening 9 and a combustion state with a uniform and good flame length is obtained. Further, in the present embodiment, the inner side rectifying body 35 and the outer side rectifying body 36 are doubled, but it is possible to further multiplex depending on the size of the cross-sectional width of the annular pipe 31. .

  As described above, the burner according to the present invention ensures a stable combustion air suction state in the mixing tube, can ensure a uniform flame balance and stable combustion performance at the same time, and increase or decrease the maximum combustion amount of the burner. Since it is possible to provide a compact burner that can cope with changes in specifications without the need to change the outer shape of the annular tube or mixing tube, cooking utensils, water heaters, and heaters that use this as a heating source It can be applied to many uses such as a machine and an incinerator.

The top view of the burner of Embodiment 1 of this invention Sectional drawing of the AA line of the burner of Embodiment 1 of this invention (A) Top view of the rectifier in Embodiment 1 of the present invention (b) Side view of the rectifier in Embodiment 1 of the present invention (A) Exploded view of the rectifying body in Embodiment 1 of the present invention (b) Drawing layout drawing of the rectifying body in Embodiment 1 of the present invention The expanded sectional view of the BB line of the burner of Embodiment 1 of this invention Top view of burner according to Embodiment 2 of the present invention Sectional drawing of the CC line of the burner of Embodiment 2 of this invention Explanatory drawing of the conceptual configuration of a conventional burner Explanatory drawing of the conceptual configuration of another conventional burner

Explanation of symbols

1, 30 Burner 2, 31 Annular tube 3 Mixing tube 4 Flame port plate (top side)
5 Bottom plate (lower side)
7, 39, 41 Groove-shaped convex part (fitting fixing part)
9 Slit-shaped flame outlet 10 Discontinuous part 11, 40, 42 Groove-shaped concave part (fitting fixing part)
14 Plural small holes 15, 37, 38 Opening 16, 35, 36 Rectifier 17, 43 Resistor 18 Matching part 19, 34 Annular space 20, 32 Annular space on the inner periphery

Claims (5)

A mixing tube for introducing a premixed gas; and an annular tube having a plurality of flame ports on its inner peripheral surface, the mixing tube being configured to communicate in a substantially tangential direction of the annular tube; A rectifier and a resistor are provided, and the rectifier separates the inside of the annular tube into an annular space on the inner peripheral side and the outer peripheral side, communicates the annular spaces, and allows a premixed gas to pass therethrough to form a flame in the flame opening. The burner is configured to make the distribution uniform, and the resistor is provided in the annular space on the outer peripheral side to suppress the backflow of the premixed gas from the annular tube to the communicating portion between the mixing tube and the annular tube. 2. The burner according to claim 1, wherein a plurality of rectifying bodies are provided so as to divide the inside of the annular tube into a plurality of annular spaces, the annular spaces communicate with each other via the respective rectifying bodies, and a resistor is provided in the annular space on the outer peripheral side. . The burner according to claim 1 or 2 , wherein the resistor is provided across the inside of the annular space on the outer peripheral side . The burner according to any one of claims 1 to 3, wherein the annular tube is configured by fitting the upper surface side and the lower surface side, and the rectifier and the resistor are fitted and fixed between the upper and lower surfaces of the annular tube. The burner according to claim 4 , wherein a fitting portion for preventing the rotation of the rectifying body in the circumferential direction is fixed to a fitting fixing portion of the annular tube and the rectifying body.

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