JP2593882Y2 - Premix burner - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas burner used for a Chinese range or the like, and more particularly to a premix burner.

[0002]

2. Description of the Related Art For cooking various kinds of Chinese foods, there is a Chinese range in which the heating power can be adjusted over a wide range from a case where a large heating power is required to a case where a very weak heating power is required. is necessary. Conventional gas burners for this kind of Chinese range are roughly classified into two types. One type is
One is a premix (premix) burner, and the other is a premix (external mix) burner.

[0003] 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 the combustion noise can be suppressed to a small level. However, it is necessary to provide a separate mixing device. On the other hand, the premix burner is of a type in which compressed air and gas are mixed at an ignition port of the burner and ignited there, and it is not necessary to separately provide a mixing device.

A conventional example of such a premixed burner is shown in FIGS. 4 and 5 of the accompanying drawings. FIG. 4 is a schematic sectional view showing the entire configuration of a conventional premixed burner, and FIG. 5 is a sectional view taken along line AA of FIG. As shown in FIGS. 4 and 5, in this conventional premix burner, a first cylinder 103 is attached to an outer periphery of a first burner base 101, and a first cylinder 103 is mounted on the first cylinder 103. Two burner bases 102 are attached. Further, a second cylinder 105 is attached to the outer periphery of the second burner base 102,
The burner base 102 further includes a second cylinder 1
A nozzle cylinder 109 is mounted inside the nozzle 05. On the outer circumference of the nozzle cylinder 109, as shown in FIG.
Are formed.

[0005] Above the second cylinder 105, a burner head 107 having a flame opening 107A for emitting a flame at the center is arranged. Further, between the upper part of the nozzle cylinder 109 and the burner head 107, compressed air is supplied to the combustion chamber 1
A plurality of compressed air blowing openings 1 for blowing into
Blow cylinder 106 having 06A is arranged. Furthermore, a compressed air supply pipe 112 for supplying compressed air is connected to the first burner base 101,
A gas supply pipe 111 for supplying gas is connected to the second burner base 102. 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, a pipe 11 connected to a gas source (not shown) is used.
The gas sent through the gas cock 114 and the gas flow rate controller 115 provided in the middle of 3 is sent through the gas supply pipe 111 to the inside of the nozzle cylinder 109, and further distributed around the nozzle cylinder 109. Through a plurality of flame holes 109 </ b> A, the air is blown into the combustion chamber 108 from a gap between the lower surface of the blow cylinder 106. On the other hand, the pipe 11 connected to the blower 118
9 is fed into the inside of the first cylinder 103 through the compressed air supply pipe 112, and furthermore, a plurality of compressed air of the second burner base 102 is sent through the compressed air supply pipe 112. Opening 102A
Through the second cylinder 105,
Further, the compressed air blowing opening 1 of the blow cylinder 106
06A is blown into the combustion chamber 108.

[0007] The gas and the air blown out to the combustion chamber 108 are mixed there, and are ignited by a match or the like and burned to generate a flame extending upward through the flame opening 107 A of the burner head 107. Is done. The size of the flame used as a heating source for cooking, that is, the heating power, can be controlled by operating the gas air volume regulator 115 to regulate the gas supply amount and the air supply amount.

[0008]

The conventional premixed burner as described above has an advantage in that a separate mixing device is not required unlike the original mixed burner, but the conventional premixed burner has the advantage that air and gas are not mixed. There is a problem that mixing is not always performed well and the heat becomes low.
In addition, there is a problem that the combustion noise becomes considerable noise.

[0009] It is an object of the present invention to provide a premix burner which solves such problems of the prior art.

[0010]

SUMMARY OF THE INVENTION A premix burner according to the present invention includes a burner head having a flame opening at a central portion for emitting a flame, and a rectifying head disposed below the flame opening of the burner head. A gas nozzle disposed below the rectifying head and having a plurality of gas blowing holes for blowing gas to the periphery, and a plurality of gas nozzles distributed around the gas nozzle for blowing compressed air toward the gas nozzle. And the compressed air blown out from the compressed air outlet is guided downward along the periphery of the gas nozzle by the lower surface of the rectifying head, from there in the vicinity of the gas outlet. When the mixture gas is mixed with the blown gas and the mixture gas is ignited there, the generated flame spreads along the upper surface of the rectifying head and the flame opening of the burner head. It is configured to be out upward from.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS.
Embodiments of the present invention will be described in more detail.

FIG. 1 is a schematic sectional view showing an entire configuration of a premixed burner as one embodiment of the present invention, and FIG.
1. FIG. 3 is a sectional view taken along line AA of FIG. 1, and FIG. 3 is an enlarged half sectional view of a burner head portion for explaining a principle of forming a combustion flame in the burner of FIG. As shown in FIGS. 1 to 3, in the premix burner of this embodiment, a first cylinder 3 is attached to an outer periphery of a first burner base 1,
The second burner base 2 is mounted on the first cylinder 3. 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 periphery of the second burner base 2, and the second burner base 2
Is provided with a blow cylinder 6 inside the third cylinder 5. On the second cylinder 5 and the blow cylinder 6, a burner head 7 having a flame opening 7A for emitting a flame at the center is arranged. A nozzle base 8 is arranged above the central portion of the second burner base 2 and inside the blow cylinder 6. The second burner base 2 and the first burner base 1 are provided at the center of the nozzle base 8.
The gas nozzle 9 is disposed so as to extend downward through the center of the blow cylinder 6 and to extend upward along the center of the blow cylinder 6.

A rectifying head 10 is provided above the gas nozzle 9.
Is attached so as to be located below the flame opening 7A 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 inside the blow cylinder 6, a plurality of gas blowing holes 9A for blowing gas are distributed and arranged at equal angular intervals, as is well shown in FIG. I have.

The nozzle base 8 is provided with a spark rod 24 and a frame rod 25 so as to be located near the gas outlet 9A on the outer periphery of the gas nozzle 9. In this embodiment, the nozzle base 8 is
The central portion is formed in a convex shape, and the outer peripheral portion is formed in an annular groove shape, and the juice receiver 11 is arranged in the annular groove.

The blow cylinder 6 supplies compressed air toward the gas nozzle 9 into a combustion chamber 30 formed between the blow cylinder 6, the nozzle base 8, the gas nozzle 9, and the rectifying head 10. A plurality of compressed air blowing openings 6A for blowing are provided in a dispersed manner. In this embodiment, as shown in FIG. 2, a plurality of compressed air blowing openings 6A are formed at equal angular intervals around the periphery of the blow cylinder 6. The gas nozzle 9 is formed so as to extend in such a direction as to blow air in a direction at an angle with respect to the gas blowing direction from the gas blowing hole 9A.

Further, the first burner base 1 includes:
A compressed air supply pipe 12 for supplying compressed air is connected, and a gas supply pipe 11 for supplying gas is connected to a lower end of the nozzle base 8. The inside of the first cylinder 3 and the inside of the third cylinder 5 are communicated by a plurality of openings 2A formed at equal angular intervals around the second burner base 2.

In the premix burner of this embodiment,
The gas is sent to the mixing joint 17 through a gas cock 14, a gas air volume regulator 15, and a gas solenoid valve 16 provided in the middle of a pipe 13 connected to a gas source (not shown). On the other hand, the thin pipe 21 branched from the pipe 19 connected to the blower 18 and the joint 2
A constant and extremely small amount of compressed air is sent to the mixing joint 17 through the air nozzle 2 and the air nozzle 23. Thus, 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 mixture of the gas and the air sent into the gas nozzle 9 is blown into the combustion chamber 30 through the plurality of gas blowing holes 9A.

On the other hand, the pipe 19 connected to the blower 18
The compressed air sent through the gas air volume regulator 15 provided in the middle of the pipe 20 which is the main stream of the air is sent into the space between the first cylinder 3 and the second cylinder 4 through the compressed air supply pipe 12. And a third cylinder 5 through a plurality of openings 2A of the second burner base 2.
And blown into the combustion chamber 30 through the compressed air blowing opening 6 </ b> A of the blow cylinder 6.

The air blown out to the combustion chamber 30 is guided by the lower surface 10A of the rectifying head 10 as shown by a dotted arrow in FIG.
Is directed downward along the periphery of the gas nozzle 9 and is mixed with the gas blown out from the vicinity of the gas blowout hole 9A of the gas nozzle 9. The gas and the air mixed and mixed in the combustion chamber 30 in this way are ignited by the discharge from the spark rod 24 to the gas nozzle 9, and as shown by the solid arrow,
The vortex forms a flame out of the flame opening 7A of the burner head 7 along the upper surface 10B of the rectifying head 10.

As shown in FIG. 2, as shown in FIG. 2, the compressed air blowing opening 6A blows air in a direction at an angle to the gas blowing direction from the gas blowing hole 9A. When formed, the flow of the compressed air in the combustion chamber 30 turns along 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 is something like going out. Therefore, the mixing of gas and air can be improved.

The size of the flame extending upward through the flame opening 7A of the burner head 7, that is, the thermal power, is controlled by operating the gas air volume regulator 15 to simultaneously adjust the gas supply amount and the air supply amount. can do. The frame rod 25 is for detecting the presence of a flame,
If the presence of a flame is not detected by the flame rod 25 even after the automatic ignition by the spark rod 24,
A signal is sent to the gas solenoid valve 16 so that the gas supply can be stopped to ensure safety. The safety device based on the automatic ignition by the spark rod 24 and the flame detection by the flame rod 25 may be a known device, and will not be described in detail.

According to the burner configuration of this embodiment, it is also possible to generate a flame having a very weak heat, and when such a low heat is required, the ignition is performed as follows. By operating the lever 15A of the gas air volume controller 15, the supply amount of gas to the mixing joint 17 and the supply amount of compressed air to the compressed air supply pipe 12 are simultaneously reduced to the maximum at an appropriate ratio. Then, since a very small amount of air at a constant pressure is always 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 and the branch pipe. A very small amount of air sent from 21 is mixed. The air-fuel mixture is sent from the gas supply pipe 26 to the gas nozzle 9, and is discharged from the gas outlet 9 </ b> A into the combustion chamber 30. Then, the gas nozzle 9 is moved from the spark rod 24 by the automatic ignition device.
By causing the discharge to occur, the air-fuel mixture is ignited, and a low-flame flame is formed.

[0024]

The premix burner of the present invention does not require a separate mixing device, which is required in the original mix burner, and can perform good mixing of gas and air at an arbitrary ratio. Therefore, adjustment from a combustion flame having a strong thermal power to a combustion flame having a very low thermal power can be performed very easily. Also,
Combustion noise can also be reduced.

Therefore, the premix burner of the present invention is:
It is particularly effective when used as a burner for a Chinese range or the like that requires a very wide range of thermal power adjustment.

[Brief description of the drawings]

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

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

FIG. 3 is an enlarged half sectional view of a burner head for explaining a principle of forming a combustion flame in the burner of FIG. 1;

FIG. 4 is a schematic sectional view showing the entire configuration of a conventional premixed burner.

FIG. 5 is a sectional view taken along line AA of FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 1st burner base 2 2nd burner base 2A 2nd burner base opening 3 1st cylinder 4 2nd cylinder 5 3rd cylinder 6 Blow cylinder 6A Compressed air blowing opening 7 Burner head 7A Flame opening 8 Nozzle Base 9 Gas nozzle 9A Gas blowout hole 10 Rectifier head 10A Lower surface of rectifier head 10B Upper surface of rectifier head 12 Pumping air supply pipe 13 Pipe 14 Gas cock 15 Gas air volume regulator 15A Gas air volume regulator 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)

(57) [Scope of request for utility model registration] 1. A burner head having a flame opening at a central portion for emitting a flame, a rectifying head disposed below the flame opening of the burner head, and a gas disposed at a lower portion of the rectifying head and surrounding gas. A gas nozzle having a plurality of gas blowing holes for blowing, and a plurality of compressed air blowing ports for distributing and blowing compressed air toward the gas nozzle so as to surround the gas nozzle; The compressed air blown out from the air outlet is guided downward along the periphery of the gas nozzle by the lower surface of the rectifying head and mixed with the gas blown out of the gas nozzle in the vicinity of the gas outlet, 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 rectifying head. And a premix burner. 2. The premix burner according to claim 1, wherein the compressed air outlet is formed so as to blow air in a direction at 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. The premix according to claim 1, wherein a spark rod for automatic ignition is disposed near the periphery of the gas nozzle, and a flame rod for detecting the presence of a flame is disposed. Expression burner.