JPH0684122U - Premixed burner - Google Patents

Abstract

(57) [Summary] [Structure] In the premixed burner, a rectifying head is arranged below the flame opening of the burner head, and below the rectifying head,
A gas nozzle having a plurality of gas blowing holes for blowing gas around is arranged, and a plurality of compressed air outlets are distributed around the gas nozzle so that the compressed air blown out from the compressed air outlet. Is guided downward by the lower surface of the rectifying head along the periphery of the gas nozzle and mixed with the gas blown out from the vicinity of the gas blowing hole, and when the mixed gas is ignited there, the generated flame is The burner head is configured so as to be projected upward along the upper surface of the flow straightening head. [Effect] Since gas and air can be mixed satisfactorily at an arbitrary ratio, adjustment from a combustion flame with a strong heat power to a combustion flame with a very weak heat power can be performed very easily. Also, the combustion noise can be suppressed to a low level.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a gas burner used in a Chinese range or the like, and particularly to a premixed burner.

[0002]

[Prior art]

 Various types of cooking, such as Chinese food, require a Chinese range that can be adjusted over a very wide range, from the case where a large amount of heat is required to the case where it needs to be extremely weak. ing. There are roughly two types of conventional gas burners for this type of Chinese range. One type is a premixed (premixed) burner, and the other type is a premixed (externally mixed) burner.

Among them, the original mixing type burner is of a type in which air and gas are mixed in advance and then the mixture is sent to the ignition port of the burner to ignite there, and combustion noise can be suppressed to a low level. Yes, but a separate mixing device must be provided. On the other hand, the premix type burner is of a type in which compressed air and gas are mixed at the ignition port of the burner to ignite there, and it is not necessary to separately provide a mixing device.

As a conventional example of such a premixed burner, there is one as shown in FIGS. 4 and 5 of the accompanying drawings. FIG. 4 is a schematic cross-sectional view showing the overall structure of a conventional premixed burner, and FIG. 5 is a sectional view taken along the line AA of FIG. As shown in these FIGS. 4 and 5, in this conventional premixed burner, a first cylinder 103 is attached to the outer periphery of a first burner base 101, and on this first cylinder 103, A second burner base 102 is attached. Further, a second cylinder 105 is attached to the outer periphery of the second burner base 102, and a nozzle cylinder 109 is attached inside the second cylinder 105 to the second burner base 102. ing. As shown in FIG. 5, a plurality of flame holes 109A are formed on the outer periphery of the nozzle cylinder 109 at equal angular intervals.

On the upper part of the second cylinder 105, a burner head 107 having a flame opening 107A for emitting a flame is arranged in the central portion. Further, between the upper part of the nozzle cylinder 109 and the burner head 107, a blow cylinder 106 having a plurality of compressed air blowing openings 106A for blowing the compressed air into the combustion chamber 108 is arranged. Furthermore, the first burner base 101 is connected to a compressed air supply pipe 112 for supplying compressed air, and the second burner base 102 is connected to a gas supply pipe 111 for supplying gas. It is connected. The inside of the first cylinder 103 and the inside of the second cylinder 105 are communicated with each other by a plurality of openings 102A formed at equal angular intervals around the second burner base 102.

In such a conventional premix burner, the gas sent through a gas cock 114 and a gas air flow controller 115 provided in the middle of a pipe 113 connected to a gas source (not shown). Is sent to the inside of the nozzle cylinder 109 through the gas supply pipe 111, and is further burned through the gap between the blow cylinder 106 and the lower surface of the blow cylinder 106 through the plurality of flame holes 109A that are dispersedly arranged on the outer periphery of the nozzle cylinder 109. It is blown out into the chamber 108. On the other hand, the compressed air sent through the gas flow rate controller 115 provided in the middle of the pipe 119 connected to the blower 118 is sent into the inside of the first cylinder 103 through the compressed air supply pipe 112, and further. , Is blown into the inside of the second cylinder 105 through the plurality of openings 102A of the second burner base 102, and is further blown into the combustion chamber 108 through the compressed air blowing opening 106A of the blow cylinder 106.

In this way, the gas and air blown into the combustion chamber 108 are mixed there, burned by ignition in a match or the like, and a flame extending upward through the flame opening 107A of the burner head 107 is generated. Is generated. The size of this flame used as a heating source for cooking, that is, the heat power, can be controlled by operating the gas air flow controller 115 to adjust the gas supply amount and the air supply amount. .

[0008]

[Problems to be solved by the device]

 The conventional premixed burner as described above has an advantage in that it does not require a separate mixing device like the original mixed burner, but the air and the gas are not always mixed well. There is a problem that the heat power becomes low, and there is also a problem that the combustion noise becomes a lot of noise.

An object of the present invention is to provide a premixed burner that solves the above problems of the prior art.

[0010]

[Means for Solving the Problems]

 The premixed burner according to the present invention has a burner head having a flame opening for emitting a flame in a central portion, a rectifying head arranged below the flame opening of the burner head, and a lower portion of the rectifying head. A gas nozzle having a plurality of gas blowout holes for blowing gas to the surroundings, and a plurality of compressed air blowout ports for blowing the compressed air toward the gas nozzles dispersedly arranged so as to surround the gas nozzle. The pressure-fed air blown from the pressure-fed air outlet is guided downward by the lower surface of the rectifying head along the periphery of the gas nozzle, and is blown out from the gas in the vicinity of the gas blowing hole. When mixed and the mixed gas is ignited there, the generated flame is emitted upward from the flame opening of the burner head along the upper surface of the flow straightening head. Is constructed sea urchin.

[0011]

【Example】

 1 to 3 of the accompanying drawings, the present invention will be described in more detail with respect to an embodiment of the present invention.

FIG. 1 is a schematic cross-sectional view showing the entire structure of a premixing burner as one embodiment of the present invention, FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1, and FIG. FIG. 3 is an enlarged half cross-sectional view of a burner head portion for explaining a principle of forming a combustion flame in the burner of FIG. 1. As shown in FIGS. 1 to 3, in the premixed burner of this embodiment, the first cylinder 3 is attached to the outer periphery of the first burner base 1, and the first cylinder 3 is mounted on the first cylinder 3. The second burner base 2 is attached to. Further, a second cylinder 4 is provided inside the first cylinder 3 between the first burner base 1 and the second burner base 2.

A third cylinder 5 is mounted on the outer circumference of the second burner base 2, and a blow cylinder 6 is provided inside the third cylinder 5 in the second burner base 2. There is. Above the second cylinder 5 and the blow cylinder 6, a burner head 7 having a flame opening 7A for emitting a flame in the central portion is arranged. A nozzle base 8 is arranged inside the blow cylinder 6 above the central portion of the second burner base 2. The nozzle base 8 extends downward through the central portions of the second burner base 2 and the first burner base 1 in the central portion of the nozzle base 8, and also extends upward along the central portion of the blow cylinder 6. Then, the gas nozzle 9 is arranged.

A rectifying head 10 is attached to the upper part of the gas nozzle 9 so as to be located below the flame opening 7 A of the burner head 7. In this embodiment, the rectifying head 10 has an umbrella shape having a substantially horizontal lower surface 10A and a tapered upper surface 10B. Around the gas nozzle 9 extending inward of the blow cylinder 6, as shown in FIG. 2, a plurality of gas blowout holes 9A for blowing out gas are distributed at equal angular intervals. There is.

A spark rod 24 and a frame rod 25 are arranged on the nozzle base 8 so as to be located in the vicinity of the gas blowing hole 9 A on the outer circumference of the gas nozzle 9. In addition, in this embodiment, the nozzle base 8 has a convex central portion and an annular groove-shaped outer peripheral portion, and the juice receiver 11 is arranged in the annular groove. There is.

In the blow cylinder 6, the blow cylinder 6, the nozzle base 8, the gas nozzle 9, and the commutation head 10 are formed into a combustion chamber 30 formed therein, and air is fed under pressure toward the gas nozzle 9. A plurality of compressed air blowing openings 6A for blowing air are provided dispersedly. In this embodiment, as well shown in FIG. 2, a plurality of compressed air blowing openings 6A are formed at equal angular intervals around the circumference of the blow cylinder 6, and these compressed air blowing openings are formed. 6A is formed so as to extend in such a direction as to blow out air in a direction forming an angle with respect to the blowing direction of gas from the gas blowing hole 9A of the gas nozzle 9.

Furthermore, the first burner base 1 is connected to a compressed air supply pipe 12 for supplying compressed air, and the lower end of the nozzle base 8 is provided with a gas supply pipe 11 for supplying gas. It is supposed to be connected. The inside of the first cylinder 3 and the inside of the third cylinder 5 communicate with each other around the second burner base 2 by a plurality of openings 2A formed at equal angular intervals.

In the premixed burner of this embodiment, a gas cock 14, a gas air flow controller 15 and a gas solenoid valve 16 provided in the middle of a pipe 13 connected to a gas source (not shown) The gas is sent to the mixing joint 17. On the other hand, a fixed and minimal amount of compressed air is sent to the mixing joint 17 through a thin pipe 21, a joint 22 and an air nozzle 23 branched from a pipe 19 connected to a blower 18. In this way, the gas sent to the mixing joint 17 and the compressed air are mixed there and sent into the gas nozzle 9 through the gas supply pipe 11. The gas-air mixture sent to the gas nozzle 9 is blown into the combustion chamber 30 through the plurality of gas blowing holes 9A.

On the other hand, the compressed air sent through the gas flow rate controller 15 provided in the middle of the pipe 20, which is the main stream of the pipe 19 connected to the blower 18, passes through the compressed air supply pipe 12 to the first It is fed into the space between the cylinder 3 and the second cylinder 4, further fed into the inside of the third cylinder 5 through the plurality of openings 2A of the second burner base 2, and further into the blow cylinder 6. It is blown into the combustion chamber 30 through the compressed air blowing opening 6A.

In this way, the air blown into the combustion chamber 30 is guided by the lower surface 10A of the flow-regulating head 10 as shown by a dotted arrow and directed downward along the circumference of the gas nozzle 9, as shown in FIG. In the vicinity of the gas outlet hole 9A of the gas nozzle 9, it is mixed with the gas blown from there. The gas and air thus agitated and mixed in the combustion chamber 30 are ignited by the discharge from the spark rod 24 to the gas nozzle 9, and swirl along the upper surface 10B of the flow straightening head 10 as shown by the solid arrow. A flame comes out from the flame opening 7A of the burner head 7.

As well shown in FIG. 2, as in this embodiment, the compressed air blowing opening 6A blows air in a direction forming an angle with respect to the blowing direction of the gas from the gas blowing hole 9A. When formed, the flow of the compressed air in the combustion chamber 30 swirls in the vertical direction of the combustion chamber 30 and proceeds along the annular space between the outer circumference of the gas nozzle 9 and the inner circumference of the blow cylinder 9. It will be like going out. Therefore, the mixing of gas and air can be improved.

The size of the flame that extends upward through the flame opening 7A of the burner head 7, that is, the thermal power, is controlled by operating the gas flow rate controller 15 to simultaneously adjust the gas supply amount and the air supply amount. can do. The flame rod 25 is for detecting the presence of flame, and when the flame rod 25 does not detect the presence of flame even after the automatic ignition by the spark rod 24, a signal is sent to the gas solenoid valve 16 to detect the gas. We are trying to ensure safety by allowing the supply to be stopped. These safety devices for automatically igniting the spark rod 24 and detecting flames on the flame rod 25 may be publicly known devices and will not be described in further detail.

According to the burner configuration of this embodiment, it is possible to generate a flame of a very weak fire power, and when such a low fire is required, ignition is performed as follows. By operating the lever 15A of the gas flow rate controller 15, the supply amount of the gas to the mixing joint 17 and the supply amount of the compressed air to the compressed air supply pipe 12 are simultaneously reduced to an appropriate ratio. Then, since a very small amount of air having a constant pressure is constantly sent to the mixing joint 17 through the branch pipe 21, the joint 22 and the air nozzle 23, there is a very small amount of gas sent through the pipe 13 there. A very small amount of air sent from the branch pipe 21 is mixed. The air-fuel mixture is sent from the gas supply pipe 26 to the gas nozzle 9, and is discharged into the combustion chamber 30 through the gas outlet 9A. Therefore, the automatic ignition device causes the spark rod 24 to discharge to the gas nozzle 9, whereby the air-fuel mixture is ignited and a flame of low flame is formed.

[0024]

[Effect of device]

 The premixed burner of the present invention does not require a separate mixing device, which is necessary in the original mixed burner, and can well mix gas and air at an arbitrary ratio, and thus has a high heat power. It is very easy to adjust from combustion flames to combustion flames with very weak firepower. Also, the combustion noise can be suppressed to a low level.

Therefore, the premixed burner of the present invention is particularly effective when used as a burner for a Chinese range or the like, which needs to control the heat power over a very wide range.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view showing the overall configuration of a premixing burner as an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is an enlarged half cross-sectional view of a burner head portion for explaining the principle of combustion flame formation in the burner of FIG.

FIG. 4 is a schematic cross-sectional view showing the overall configuration of a conventional premixing burner.

5 is a cross-sectional view taken along the line AA of FIG.

[Explanation of symbols]

 1 First Burner Base 2 Second Burner Base 2A Second Burner Base Opening 3 First Cylinder 4 Second Cylinder 5 Third Cylinder 6 Blow Cylinder 6A Compressed Air Blow-out Opening 7 Burner Head 7A Flame Opening 8 Nozzle Base 9 Gas nozzle 9A Gas blowout hole 10 Straightening head 10A Lower surface of straightening head 10B Upper surface of straightening head 12 Compressed air supply pipe 13 Pipe 14 Gas cock 15 Gas air flow controller 15A Gas air flow controller lever 16 Gas solenoid valve 17 Mixing joint 18 Blower 19 Pipe 20 Mainstream pipe 21 Branch pipe 22 Joint 23 Air nozzle 24 Spark rod 25 Frame rod 26 Gas supply pipe 30 Combustion chamber

Claims (4)

[Scope of utility model registration request] 1. A burner head having a flame opening for emitting a flame in a central portion, a rectifying head arranged below the flame opening of the burner head, and a gas arranged around the rectifying head below the rectifying head. A gas nozzle having a plurality of gas outlet holes for blowing out, and a plurality of compressed air outlets for dispersing the compressed air around the gas nozzle to blow out the compressed air toward the gas nozzle are provided. The compressed air blown out from the air blowout port is guided downward by the lower surface of the rectifying head along the periphery of the gas nozzle, and is mixed with the gas blown out therefrom in the vicinity of the gas blowout hole, where it is mixed. When the gas is ignited, the generated flame is configured to be discharged upward from the flame opening of the burner head along the upper surface of the flow straightening head. Premixed burner characterized by and. 2. The premixed burner according to claim 1, wherein the compressed air outlet is formed so as to blow out air in a direction forming an angle with respect to a gas blowing direction from the gas blowing hole. . 3. A gas supply path to the gas nozzle,
2. A premix burner according to claim 1, further comprising mixing means for mixing a small amount of compressed air. 4. A premix according to claim 1, wherein a spark rod for automatic ignition is arranged in the vicinity of the periphery of the gas nozzle, and a frame rod for detecting the presence of a flame is arranged. Expression burner.