JPS5849454Y2 - infrared gas burner - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an infrared gas bar equipped with several pipes to allow secondary air to enter the combustion section of the burner.

Conventional wire mesh cylindrical burners burn only with primary air,
There was no secondary air.

Therefore, if the primary air intake port of the burner is filled with dust or the like, the amount of primary air sucked decreases and combustion becomes unstable.

The present invention has a wide combustion range so that secondary air can stably burn even if the amount of primary air sucked is small.One embodiment of this invention will be described below with reference to the drawings.

In the figure, 1 is a cylindrical burner part, wire mesh cylinder 2. An alumina rod 3 stands up on the inner periphery of this cylinder, and the outer periphery of the wire mesh cylinder 2 is covered with a heat-resistant transparent glass cylinder 4, and the lower part is a burner frame 5.
It is connected to the mixing tube 6 via.

7 is a cap that closes the lower part of the wire mesh tube 2; 8 is the wire mesh tube 2;
．． It is a lid that closes off the upper part of the alumina rod 3 and the heat-resistant transparent glass cylinder 4, and its central part is open to form an exhaust port 9.

10 is a gasket that prevents gas leakage.

The gas is ejected from the nozzle 16, mixes with the primary air sucked from the primary air port 17 due to its ejector effect, and enters between the heat-resistant transparent glass tube 4 and the wire mesh tube 3 of the burner section 1.
It is ignited and combusted by a suitable ignition means, re-combusted by the alumina rod 3, and exhausted to the outside from the exhaust port 10.

Reference numeral 11 denotes a pipe for secondary air installed facing between the wire mesh tube 2 and the alumina rod 3, and unburned gas due to lack of primary air is re-combusted by the secondary air flowing in through this pipe. .

The lower part of the pipe 11 is fixed to the burner frame 5 by brazing, and the upper part passes through the hole 12 of the cap 7 of the wire mesh tube 2 to face between the wire mesh tube 2 and the alumina rod 3 as described above.

Here, if the hole 12 of the cap 7 is formed to have the same diameter as the pipe 11 and passes through the pipe 11 tightly without any gaps, there will be a gap between the hole 12 of the cap 7 and the insertion part of the burner frame 5 and the pipe 11. If an error occurs, the cap 7 cannot be properly penetrated, and if the cap 7 undergoes thermal expansion due to combustion heat, the insertion portion of the pipe 11 restricts the expansion, creating an unreasonable internal strain force and causing the cap 7 to deform significantly.

On the other hand, if the hole 12 is made to have a larger diameter than the pipe 11 and the pipe 11 is inserted through the hole 12, a large gap will be created between the hole 12 and the hole 12, making it easy to cause backfire combustion.

Therefore, in the present invention, the hole 12 formed in the cap 7 is made larger in diameter than the pipe 11, and instead
A closing plate 13 that closes the closing plate 1 is movably disposed to close the closing plate 1.
The pipe 11 is tightly fitted into a hole 14 having the same diameter as the pipe 11 formed in 3, without any gap, and inserted into the cap 7 in a loosely fitted state.

Reference numeral 15 denotes a holding plate for receiving the closing plate 13, which is attached to the closing plate 13 and is disposed below the hole 12, whereas the closing plate 13 is located above the hole 12.

Therefore, according to the above configuration, even if the cap 7 undergoes thermal expansion due to combustion heat, the expansion of the hole 12 portion is not restricted by the pipe 11, and therefore, an unreasonable internal strain force is not generated in the cap 7. This will no longer occur, and the deformation of the cap 7 will be reduced.

In addition, even if there is a dimensional error between the burner frame 5, the vibrator 11 insertion portion, and the hole 12 of the burner cap 7, the pipe 1
1 can be inserted through the hole 12.

Moreover, the gap created between the pipe 11 and the hole 12 is
Since it is blocked by 3, there is no possibility of backfire.

Therefore, the pipe 11 can be securely attached and stable secondary air can be sent to the burner section 1, so that unburned gas caused by a lack of primary air can be reliably combusted.

In this way, the infrared gas burner of the present invention has a secondary air pipe penetrating through a part of the burner section and is located in the gas combustion section, and the through section of the pipe forms a hole larger than the pipe. Since the hole is covered with a plug that fits into the pipe and is movable relative to the hole, attaching the pipe directly to the burner part may cause large deformation of the burner part or cause backfire. This prevents the burner from causing any problems, and while keeping the burner section safe, secondary air can be reliably sent and stable combustion can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of an infrared gas burner according to an embodiment of the present invention, and FIG. 2 is an enlarged sectional view of the same essential parts. 1... Cylindrical burner part, 11... Pipe, 12... Hole, 13... Closure plate.

Claims (1)

[Scope of utility model registration request] A wire mesh tube whose lower part is closed with a cap, an alumina rod standing upright on the inner circumference of the wire mesh tube, a heat-resistant transparent glass tube provided with a gap on the outer periphery of the wire mesh tube, and interlocking with the wire mesh tube. The wire mesh tube includes a burner frame that holds the heat-resistant transparent glass tube, a mixing tube that is connected to the burner frame, and a lid that supports the wire mesh tube, the alumina rod, and the heat-resistant transparent glass tube at an upper part. A secondary air pipe is provided inside the cap and the burner frame to supply secondary air, and a hole in the cap through which the secondary air pipe is inserted is made larger than the diameter of the pipe. The infrared gas burner further comprises a closing plate formed on the pipe to close the hole of the cap from both sides with a small gap.