JP6549626B2 - Burner device - Google Patents

Description

  The present invention relates to a burner device that generates long flames and a lighting device that can be used in an outdoor environment using the burner device.

  A non-patent document 1 describes an illumination device such as a bonfire that burns gas outdoors to cause a flame to rise, as shown in FIG. In this lighting device, a burner device is installed in the lower part in a glass tube, and a luminous flame is formed in the glass tube. The burner device is a partially premixed burner in which primary air is sucked by an injector.

  As shown in FIG. 9, the flame holes of the burner device are made of a ceramic grid. Here, if the primary air ratio is lowered to darken the flame yellow, it becomes yellow flame from the flame base, and there is a high possibility that soot adheres to the flame detector, spark plug or exhaust passage, and practicability and safety Problems arise in sexuality. By increasing the primary air ratio, it is possible to make the flame base a blue flame, but it becomes a flame that the lower part of the flame is blue and the upper part is unnatural as a decorative long flame.

  Further, Patent Document 1 discloses a combustion method of blowing a fuel into a tubular flame in the axial direction thereof to form a luminous flame that swirls. Furthermore, Patent Document 2 discloses a light apparatus that performs combustion by the above-described combustion method in a glass tube. The light device has a bright flame swirling to form a striking flame, while the tubular flame has a disadvantage that the pressure loss of the combustion air is large, and it requires a forced blower using a commercial power source.

  There is a gas fireplace for the purpose of producing a decorative flame. Patent Document 3 shows a gas fireplace that makes a ceramic artificial wood appear to be burning by adding a flame retardant to an infrared burner flame. Since the infrared burner is used, the flame is relatively short even by using the flame reaction, and it is impossible to realize a long flame having a length of about 0.5 m.

Limited company ikeda homepage (http://patioheater.ikedaya.net/)

JP, 2013-145099, A JP, 2013-145075, A Japanese Utility Model Application Publication No. 5-36201

In view of the above, the present invention does not necessarily require commercial electric power and realizes a practical and safe flame that is less likely to cause adhesion and deposition of soot when realizing a decorative long flame having light, motion and warmth. an object and Turkey to provide a burner apparatus capable.

  The burner apparatus according to the present invention is a burner apparatus that draws primary air by an injector using a pressure of fuel gas under atmospheric pressure to form a partial premixed gas, and burns it in a burner section to generate a flame. The burner unit is formed in a cylindrical shape whose upper surface is closed, a plurality of flame holes are formed on the outer peripheral surface of the burner unit, and a straightening cylinder is provided upward on the upper surface of the burner unit or above the burner unit. It is.

  The above-mentioned burner section is similar to a partial premixed burner (so-called Bunsen burner) such as a stove, and a large number of flame holes are formed in the horizontal direction on the outer peripheral surface of the burner section. In such a burner unit, when the flow rate of the mixture containing the fuel gas is increased, a vortex is formed on the upper surface of the burner unit, and the flame is caught and easily becomes a turbulent flame. Therefore, the flame length does not extend. Therefore, when the straightening cylinder is provided on the upper surface or upper side of the burner portion, the flame entrapment is suppressed, the laminar flame state continues, and the long flame is formed.

  Furthermore, when a plurality of flame holes are formed on the upper surface of the burner unit and the flame holes on the upper surface are positioned inside the flow straightening cylinder, the flow straightening cylinder suppresses diffusion and penetration of secondary air inside the flow straightening cylinder. , The rate of diffusion combustion becomes slow and it becomes a luminous flame state. Therefore, the flame becomes longer and brighter. Moreover, the rectifying cylinder is heated from the inside and the outside by the flame and becomes red heat, and emits light and heat (visible light to infrared light) as solid radiation, and is superimposed on the radiation from the flame to produce only the lighting device. And a burner device suitable for a heating device is constructed.

  The flame holes on the outer peripheral surface of the burner portion are in the form of slits opened horizontally and extending vertically. If the flame holes on the outer peripheral surface of the burner section are simple round holes, the mixed air flow increases, that is, when the flame hole load increases, the flame easily lifts (lifts or lifts) and blows off. . Therefore, when the flame holes are in the form of slits, the ratio of the circumferential length to the area of the flame holes is increased, so that the floating of the flame can be suppressed. As a result, a large flame load can be taken, and the formation of a long flame becomes easy.

  The flame holes on the outer peripheral surface of the burner portion can be extended to the upper surface to double as the flame holes formed on the upper surface. As described above, one flame hole in which the horizontal opening and the vertical opening are integrated is formed in a single process by pressing the thin-bladed rotary blade from diagonally above the burner portion and cutting a slit. can do. The number of processes can be reduced compared to opening the outer peripheral surface and the upper surface separately, and as a result, the processing cost can be reduced.

  The primary air ratio is limited to 10% to 50% so that the base of the flame in contact with the spark plug and the flame detector becomes a blue flame and a yellow flame is formed at the top of the flame. Generally, in a so-called Bunsen burner, the primary air ratio is set to about 40% to 60% so that the entire flame becomes a blue flame. Although the center or upper part of the flame is yellowish, although the flame as a whole forms a luminous flame, the primary air ratio is limited in order to keep the base of the flame a blue flame. Specifically, by adopting a primary air ratio of about 10% to 50%, the portion in contact with the spark plug or the flame detector becomes a blue flame, and adhesion of soot can be eliminated, and illumination or The reliability of the device as heating is improved. At the same time, the flame becomes a long flame and becomes a luminous flame except for the base, and has a suitable appearance and radiation performance as a lighting or heating flame.

  The material of the flow straightening tube is made of a heat-resistant metal wire mesh, a woven or non-woven fabric of metal fibers, a porous plate, a ceramic plate, a porous ceramic plate, a glass or ceramic fiber, or a composite material of these. The role of the straightening tube is in the straightening action (suppression of turbulent vortices) to suppress flame entrapment, but at the same time, these components have small heat capacity and are easily heated to high temperature to generate solid radiation. Depending on the choice of material, there is much radiation in the long infrared region of the wavelength, and one suitable for a heating system can also be selected. Of course, these materials must be heat resistant materials that can withstand the heating of the flame.

  It is also possible to attach or contain a flame coloring agent to the flow straightening cylinder, or to mix the flame coloring agent itself or the flame coloring agent with other materials as a material to form all or a part of the flow straightening cylinder. The flame reaction is a phenomenon in which volatilized metal ions are excited by collision of molecular species whose translational speed is increased by combustion heat or the like, and emit light of a wavelength specific to the metal when returning to the ground state. Therefore, when a flame retardant that causes a flame reaction is added to the rectifying cylinder, the flame reaction light is added to the flame light to obtain light of a color different from that of the flame, and the effect according to the purpose of illumination is can get. Specifically, yellow light is added when a sodium compound is used, and pink light is added when a potassium compound is used. In addition, compounds such as barium, copper and strontium are used as flame retardants. In addition, although what is usually called a flame coloring agent says what emits visible light, the heating effect can also be assisted if the substance which emits the infrared light of a suitable wavelength range is used.

  By changing the distance between each flame hole and the straightening cylinder, it is possible to cause the flame to fluctuate. That is, the height of the flow straightening cylinder is changed to generate turbulence (winding up) partially, the cross section of the flow straightening cylinder is deformed from circular, the flow straightening cylinder is eccentrically installed with respect to the cylindrical burner portion, By interposing a separate member that changes the flow in the flow straightening cylinder, the distance between each flame hole and the flow straightening cylinder becomes different. When the straightening cylinder is cylindrical and disposed concentrically with the burner portion, the flame becomes a laminar straight-forward flame with little disturbance. In this case, the flame is the longest flame. On the other hand, if you want to make the lighting decorative, if there is a fluctuation in the flame to some extent, the appreciation effect is enhanced. Therefore, by adopting the configuration as described above, the laminar straight-forward flame can be daringly disturbed, fluctuation and deformation can be given to the flame, and visual effects can be enhanced.

  In the lighting device using the above-described burner device, the burner device is installed in a transparent cylinder having an inner diameter larger than the outer diameter of the burner device, and secondary air is burned from the air gap between the burner device and the cylinder. It supplies by the draft of and performs complete combustion.

  In this lighting device, the exhaust gas is at a high temperature because no heat exchanger is provided. Therefore, buoyancy (draft) occurs due to the density difference due to the temperature difference, and air flows upward from the lower side between the burner device and the cylinder, and a part of it is used as secondary air for the combustion reaction. Ru. By properly sizing the air gap, complete combustion is achieved. The amount of flowing air can be adjusted not only by the gap between the burner device and the cylinder but also by changing the area of the inlet and the outlet of the cylinder. Therefore, the secondary air can be circulated only by the draft, and as a result, there is no need to use a fan or a blower. As a result, no commercial power source is required, and the lighting apparatus can be installed easily and inexpensively outdoors. The cylindrical body must have heat resistance to endure heat generation due to internal combustion, but the heat resistant temperature can be lowered by the cooling effect of the air flowing along the inner wall of the cylindrical body.

  The barrel should have an inner diameter and length sized so as not to contact the flame. The flame formed by the above-described burner apparatus can be a bright flame containing a crucible precursor except for the base of the flame. When the bright flame contacts the relatively low temperature solid wall, the burning reaction of the soot precursor may be frozen and the soot may adhere to the solid wall. When the crucible adheres to the cylinder, the light transmission of the cylinder is lost, so that the function as illumination or heating is impaired. Furthermore, when soot deposits in the exhaust gas passage, the pressure loss in the passage increases, and the secondary air flow rate may decrease, which may lead to a risk of incomplete combustion. Since the flame formed by the above burner apparatus is basically a laminar straight-forward flame with less fluctuation, if a cylinder having an inner diameter larger than the maximum diameter of the flame is used, the flame does not contact the cylinder, The above risks are suppressed. In addition, since the diameter which can visually recognize a flame changes with flows of secondary air, it is not the same as the case where it burns in the still air outside a cylinder outside.

  The lighting device can be installed outdoors by providing a protection member for restricting the intrusion of the wind and rain at the air supply port and the exhaust port for the burner device so that the combustion is not disabled by the wind and rain. When the length of the cylinder is long, the positions in the height direction of the air inlet and the air outlet are different. Therefore, if an appropriate windproof measure is not taken, the wind may cause a change in the flow rate and the flow direction of the combustion air, which may affect the combustion. In addition, if rain enters directly from the top of the cylinder, the flame may be extinguished by the water cooling effect. Therefore, select the position and size of the air inlet and outlet to suppress changes in the flow of combustion air due to wind, and attach a protective member around the burner device including the air inlet, outlet, or nozzle periphery, Minimize the impact. With regard to rain, by using a weir having a size equal to or larger than the size of the outlet of the cylinder as a protective member above the cylinder, intrusion of rain is suppressed. This makes it possible to install the lighting device outdoors.

  According to the present invention, it is possible to form a long luminous flame having a blue flame at the base, so dirt such as firewood is not easily attached to the igniter, flame detector, exhaust gas passage and cylinder, and it is safe and effortless It is possible to provide a burner device which can be omitted. In addition, by forming a decorative long flame in which the flame sways, a lighting device capable of creating an attractive and healing space can be realized. Moreover, the radiation efficiency can be enhanced, and a lighting device that can be used as a heating device can be realized. Furthermore, since secondary air can be taken in spontaneously, a commercial power source for the combustion fan is not required, and the restriction on the installation location can be minimized.

The perspective view of the lighting installation of one embodiment of the present invention Front view of the lighting device Schematic diagram of lighting device Schematic configuration of the burner device Top view and front view of the burner unit Top view and front view of the burner unit of another embodiment Cross-sectional view of a burner unit according to another embodiment A perspective view of a conventional lighting device A perspective view of a conventional burner device

  The illuminating device of this embodiment is shown to FIGS. The lighting device comprises a burner device 1 which burns a fuel gas to form a long flame, and a cylindrical body 2 which radiates heat so that the long flame in a bright flame state can be viewed from the outside, A cylinder 2 is disposed on the upper side of the device 1.

  As shown in FIG. 4, the burner device 1 has a burner unit 4 that sucks primary air by the injector 3 using the pressure of fuel gas under atmospheric pressure to form a partial premixed gas and burn it. As shown in FIG. 5, the burner unit 4 is formed in a cylindrical shape whose upper surface is closed, and a plurality of flame holes 5 and 6 are formed on the outer peripheral surface and the upper surface of the burner unit 4. A straightening cylinder 7 is provided on the top surface of the burner unit 4 to straighten the flow of the flame.

  The burner unit 4 includes a burner body 10 made of brass, stainless steel, cast iron or the like and a burner cap 11, and the burner cap 11 is fitted on the upper surface of the burner body 10. A large number of slit-shaped flame holes 5 opened in the horizontal direction are formed on the outer peripheral surface of the burner cap 11, and a plurality of circular flame holes 6 opened in the vertical direction are formed on the upper surface of the burner cap 11. It is done. The plurality of flame holes 6 on the upper surface are arranged concentrically at equal intervals.

  The burner device 1 includes a gas cock 12, a governor 13, a gas cylinder 14, a nozzle 15, a mixing tube (injector) 3, a flame detector 16, an ignition plug 17, and a control device 18. The burner device 1 is housed in a stainless steel case 20. The upper surface of the case 20 is closed, and a circular hole 21 is formed at the center of the upper surface. The burner portion 4 protrudes upward from the circular hole 21. The flame holes 5 and 6 are located above the upper surface of the case 20. A vent 22 for taking in external air is formed on the outer peripheral surface of the case 20.

  The gas cock 12 is used to open and close the fuel gas passage and adjust the flow rate, and the igniter operates in conjunction with the operation of the gas cock 12. The spark plug 17 of the igniter is used to ignite the fuel gas by spark discharge. The discharge is performed by application of high voltage by the ignition transformer. The solenoid valve 23 is used to safely shut off the fuel gas at the time of misfire (blowing off) or overheating, and is often configured integrally with the gas cock 12. The governor 13 is used to regulate the pressure of the fuel gas or to decompress and pressure the high pressure gas of the gas cylinder 14. The gas cylinder 14 is used when it is uneconomical to supply fuel gas by piping, and is usually a propane gas cylinder. The flame detector 16 detects the presence or absence of a flame. As the fire detector 16, a thermocouple, a flame rod, an ultraviolet ray phototube, or the like is used. When the flame extinguishes, when the fire detector 16 detects it, the solenoid valve 23 shuts off the fuel gas as the function of the safety device (the extinguishing safety device). The control device 18 controls an ignition device, a solenoid valve 23, an ignition transformer, and the like.

  The straightening cylinder 7 is formed in a thin-walled cylindrical shape, and made of a metal mesh of heat resistant metal, a woven or non-woven fabric of metal fibers, a porous metal plate, a ceramic plate, a porous ceramic plate, a glass or ceramic fiber, or a composite material thereof. The straightening cylinder 7 is mounted on the upper surface of the burner cap 11 and is detachable from the burner unit 4. Alternatively, the straightening cylinder 7 is disposed above the burner cap 11. In the case where the straightening cylinder 7 is disposed above the burner cap 11, a support for supporting the straightening cylinder 7 is provided. A plurality of columns are provided around the burner unit 4 and a support is attached to the columns. The post is attached to the case 20 and protrudes upward from the circular hole 21. The support is located above the burner cap 11 and the flow straightening cylinder 7 is mounted on the support.

  The straightening cylinder 7 is smaller in diameter than the circular burner cap 11, larger in diameter than the circle formed by the flame holes 6 on the upper surface, and located concentrically with the burner cap 11. Therefore, the flame holes 6 on the upper surface of the burner cap 11 are located inside the flow straightening cylinder 7, and the flame holes 5 on the outer peripheral surface are located outside the flow straightening cylinder 7. Thereby, the flow straightening cylinder 7 acts to suppress the flame entrapment on the upper surface of the burner cap 11 and the diffusion and penetration of the secondary air, and promotes the formation of a long laminar flow straight flame. Furthermore, since the straightening cylinder 7 is heated from the inside and outside by flames a and b and solid radiation is performed, the straightening cylinder 7 contributes to heating.

  The cylinder 2 is a transparent cylinder larger in diameter than the burner unit 4. The cylindrical body 2 is fitted in the circular hole 21 on the upper surface of the case 20 or mounted on the upper surface of the case 20. Inside the cylinder 2 there is a burner portion 4 and a flow straightening cylinder 7. A lattice 25 is provided on the outer side of the cylinder 2, and a weir 26 is provided on the upper side of the cylinder 2.

  The inner diameter of the cylinder 2 is larger than the maximum diameter of the flame, and the length of the cylinder 2 needs to be longer than the longest flame in consideration of the combustion characteristics of the gas to be burned and the maximum amount of combustion. This is to prevent the adhesion of the soot to the soot 26 and the like due to the contact of the flame.

  A cover 27 for hiding the lower part of the cylinder 2 is provided. The heat-resistant metal cover 27 is formed in a cylindrical shape, and is slidably attached to the support column in the vertical direction. The cover 27 covers the outer peripheral surface of the lower part of the cylinder 2, and the upper end of the cover 27 is at a position higher than the upper end of the flow straightening cylinder 7. Therefore, the cover 27 also hides the burner portion 4, the flow straightening cylinder 7 and the columns. The cover 27 may be made of a transparent material in order to obtain the effect of showing the flame of the burner device 1. Alternatively, the cover 27 may be provided with a window so that the inside of the cover 27 can be seen.

  The grid 25 is for preventing the combustibles from coming into contact with the cylindrical body 2 and for preventing the burns of the human body due to the contact, and a wire mesh, a wire or a perforated metal plate is provided to surround the cylindrical body 2. And so on. The grid 25 is detachably attached to the upper surface of the case 20, and the upper end of the grid 25 is located higher than the upper end of the cylinder 2.

  The weir 26 is provided to prevent wind and rain from intruding directly into the cylinder 2, and is attached to the upper end of the lattice 25 to cover the outlet of the upper end of the cylindrical member 25. A gap for passing the combustion exhaust gas discharged from the outlet of the cylinder 2 is formed between the weir 26 and the cylinder 2, and the outlet of the cylinder 2 is an exhaust port. The material of the crucible 26 is required to have a certain degree of heat resistance and non-combustibility, and therefore stainless steel, aluminum alloy, plated steel plate or the like is used.

  When the lighting system is installed outdoors, wind and rain affect combustion. Therefore, a protection member 28 is provided to restrict the entry of the wind and rain so that the combustion is not disabled by the wind and rain. Protective members are provided at the air inlet and the air outlet of the burner device 1. Specifically, as shown in FIG. 4, in order to suppress the influence of the air flow coming from the vent 22 or the outlet of the cylindrical body 2 on the flow rate and the flow direction of the combustion air, as shown in FIG. It is provided in the vicinity of the primary air intake which is a mouth. The protection member 28 is formed in a cylindrical shape by a metal porous plate, a metal cylinder with an appropriate opening, or the like. Further, the protective member 28 is provided in the secondary air intake, that is, in the gap between the burner unit 4 and the cylinder 2. The weir 26 is also a protective member that covers the exhaust port.

  Thus, the cylinder 2 makes it possible to visually recognize the flame burned inside from the outside as illumination such as a light or a fire, and the flame and radiation from the cylinder 2 are used for heating. However, when this lighting device is used exclusively for heating and heating applications, the cylinder 2 does not necessarily have to be transparent (transmits visible light), and it transmits infrared light or is opaque with a high infrared light emissivity. It may be a cylinder. The cylindrical body 2 is required to have heat resistance enough to withstand heating by the internal flame, and when installed outdoors, performance that can withstand thermal shock (heat shock) due to quenching by rain water, that is, linear expansion coefficient Smallness of is also required. From such a demand performance, when using it as a lighting installation or a heating installation outdoors, quartz glass is mentioned as an optimal material.

  When the gas cock 12 is operated, fuel gas is supplied from the gas cylinder 14 to the nozzle 15, fuel gas is ejected from the nozzle 15 at high speed, ambient air is sucked by the injector 3 with its momentum, and air-fuel mixture is formed. Ru. However, in order to form a luminous flame (yellow flame), the primary air ratio is suppressed to 10% to 50% lower than that of a conventional Bunsen burner.

  A premixed mixture of fuel and air is ejected from the flame holes 5 on the outer peripheral surface of the burner unit 4 and the flame holes 6 on the upper surface to be burned. In the combustion from each flame hole 5, 6, at the base of the flame, the premix flames form individually separated flames that become blue flames a and b, which are combined immediately downstream of them, and the luminous flame of the long diffusion flame c. This forms a long flame in which the adhesion of soot is suppressed.

  The flame from the flame hole 6 is formed inside the flow straightening cylinder 7 and the flame from the flame hole 5 is formed separately on the outside. A partial premixed mixture of the same primary air ratio is supplied to both of the flame holes 5 and 6, but a secondary flame is sufficiently supplied to the outer flame holes 5 to form a blue flame. Inflow of secondary air is suppressed by the flow straightening cylinder 7 from the inner flame hole 5, and yellow flame is formed.

  Furthermore, the blue flame at the base of the flame has high flame stability and is less likely to blow off. Therefore, even when installed outdoors, it is possible to form a flame having excellent wind resistance performance as compared to a simple diffusion flame (red flame combustion flame).

  Here, when a flame coloring agent is applied to, attached to, or impregnated in the flow straightening cylinder 7, or when the flow straightening cylinder 7 is formed of the flame coloring agent itself, the flame coloring agent is volatilized from the flow straightening cylinder 7, and light is emitted by a flame color reaction. . A flame reaction is a wavelength specific to an ion species when molecular species accelerated by energy such as combustion heat collide with metal ions of the volatilized flame colorant to excite the ions and then return to the ground state Is a phenomenon that emits light. As the flame retardant, salts such as sodium (Na; yellow), potassium (K; pink), strontium (Sr; red), copper (Cu; greenish blue), barium (Ba; green) and the like are used. Suitable salts are selected depending on the melting point, ease of shaping or corrosiveness, etc., and carbonates and oxalates are often used. The flow straightening cylinder 7 is formed of a wire mesh, a porous metal plate, a metal fiber board, a metal fiber fabric, a ceramic, or a combination of these in order to generate a flame reaction due to the flame coloring agent in the flow straightening cylinder 7, and a flame coloring agent is applied Adhere, impregnate or reshape to perform functions.

  In addition, when the cylindrical straightening cylinder 7 is disposed on the concentric circle of the burner cap 11, a laminar straight-forward flame with less fluctuation is formed. The movement of the flame at this time is the least. Therefore, if the straightening cylinder 7 is arranged eccentrically with respect to the burner cap 11, or if the straightening cylinder 7 is shaped into a polygon, a star, a straight line, etc., each flame hole 5, 6 and the straightening cylinder Since the distance to 7 changes, the flame flow is disturbed, the flame is shaken, and the decoration effect is enhanced. Alternatively, the same effect can be obtained by inserting a helical wire or strip inside the flow straightening cylinder 7. Further, by making the upper end or the lower end of the flow straightening cylinder 7 uneven, by changing the height of the flow straightening cylinder 7, the distance between the respective flame holes 5, 6 and the flow straightening cylinder 7 changes. As a result, turbulence occurs in part of the flame flow, and the flame can be shaken.

  Another embodiment of the burner apparatus is shown in FIG. The flame holes 30 of the burner portion 4 are formed at the corners of the upper edge of the burner cap 11. By opening the corner, the horizontal opening and the vertical opening are integrated. That is, the flame holes 30 on the outer peripheral surface are extended to the upper surface and double as the flame holes on the upper surface.

  As shown in FIG. 7, when the flow straightening cylinder 7 is disposed on the upper surface of the burner cap 11, the flow straightening cylinder 7 covers the flame hole 30 on the upper surface, and the flame holes 30 inside and outside the flow straightening cylinder 7. It divides into 30 and. From the flame hole 30, a sideways flame and an upward flame are integrally made, but the formed flame is divided into two, one passing through the inside of the straightening cylinder 7 and one passing through the outside, and the above implementation as shown in FIG. A flame similar to the form is formed.

  The present invention is not limited to the above embodiment, and it is needless to say that many modifications and changes can be added to the above embodiment within the scope of the present invention. The shape of the burner unit 4 is not limited to a cylindrical shape, and may be a combination of a polygonal cylinder, an elliptical cylinder, a linear cylinder, and a plurality of linear cylinders. Alternatively, the plurality of flame holes 5 may be formed only on the outer peripheral surface of the burner cap 11, and the straightening cylinder 7 may be mounted on the upper surface of the burner cap 11. The straightening cylinder 7 can suppress the flame from being caught on the upper surface of the burner unit 4 and form a long flame.

DESCRIPTION OF SYMBOLS 1 burner apparatus 2 cylinder 4 burner part 5 flame hole of outer peripheral surface 6 flame hole of upper surface 7 straightening pipe 10 burner main body 11 burner cap 20 case 22 vent 25 lattice 26 square 28 protective member 30 flame hole a blue flame b blue flame c Bright flame d Fuel gas e Air f Combustion exhaust gas

Claims (5)

A burner device for drawing primary air by an injector using a pressure of fuel gas under atmospheric pressure to form a partial premixed gas, and burning it in a burner unit to generate a flame, wherein the burner unit is an upper surface It has a tubular shape with a plurality of flame holes, and a plurality of flame holes are formed on the outer peripheral surface of the burner portion, and a flow straightening cylinder formed smaller in diameter than the upper surface of the burner portion on or above the upper surface of the burner portion The flame holes on the upper side are located inside the straightening cylinder, and the base of the flame in contact with the spark plug and the flame detector becomes a blue flame so that a bright flame is formed at the top of the flame, A burner apparatus characterized in that the primary air ratio is limited to 10% to 50% . A burner device for drawing primary air by an injector using a pressure of fuel gas under atmospheric pressure to form a partial premixed gas, and burning it in a burner unit to generate a flame, wherein the burner unit is an upper surface A plurality of flame holes are formed on the outer peripheral surface of the burner portion, a flow straightening cylinder is provided upward on the upper surface of the burner portion or above the flame holes of the outer peripheral surface of the burner portion, A slit extending in the horizontal direction and extending vertically to the upper surface and having a slit shape extending in the vertical direction and serving as a flame hole formed on the upper surface, with a flow straight cylinder covered by the flow hole on the upper surface The primary air ratio is 10% to 50% so that the base of the flame that is divided into the flame and the flame hole on the outside and contacts the spark plug and flame detector becomes blue flame and luminous flame is formed at the top of the flame. A burner device characterized in that it is limited. The material of the flow straightening tube is made of a heat-resistant metal wire mesh, a woven or non-woven fabric of metal fibers, a porous plate, a ceramic plate, a porous ceramic plate, a glass or ceramic fiber, or a composite material thereof. Or the burner apparatus of 2 statement. It is characterized in that a flame retardant is attached to or contained in the straightening cylinder, or the flame coloring agent itself or the flame coloring agent is mixed with other materials to form a whole or a part of the straightening cylinder. The burner apparatus according to any one of claims 1 to 3 . The burner device according to any one of claims 1 to 4 , wherein the distance between each flame hole and the flow straightening cylinder is made different so that fluctuation occurs in the flame.