JPS5923938Y2 - gas burner - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improved structure of an all-primary air type gas burner using a combustion tube.

The second type of gas burner generally has a mixing tube with an open top end coaxially arranged inside a combustion cylinder with a closed end made of wire mesh, etc., and the mixture supplied from the opening at the bottom end of the mixing tube is reversed. The problem was that the amount of air-fuel mixture supplied to the combustion tube was different in the vertical direction of the combustion tube, resulting in uneven combustion.

The present invention has been developed in view of the above points, and embodiments thereof will be described below with reference to the drawings.

Reference numeral 1 designates a disk-shaped lower support plate, in which a bell portion 3 that rises upward, is curved in diameter, and has an opening 2 at its tip is integrally formed in the center thereof, and an annular portion is formed between the periphery and the bell portion 3. The mounting base 4 is fixed.

Incidentally, since the bell portion 3 is integrally formed on the lower support plate 1, the number of parts is reduced here.

Reference numeral 5 denotes a disk-shaped upper support plate disposed oppositely above the lower support plate 1, which has a downward cone portion 6 formed in its center, and a position facing the mounting base 4, and a position opposite to this position and the cone portion 6. Step portions 7 and 8 are formed at positions between.

9 is a heat-resistant glass tube fixed to the periphery of the upper and lower support plates 1 and 5 via gaskets 10 and 10; 11 is a heat-resistant glass tube that fits into the stepped portion 7 and the mounting base 4 and is coaxial with the glass tube 9; This is a combustion tube cut out of a fixed wire mesh or the like, and an exhaust passage 12 is formed between the combustion tube 11 and the glass tube 9, and an exhaust port 13 is formed in the upper support plate 5. It is formed.

Reference numeral 14 denotes a mixing cylinder fixed to the opening 2 of the bell part 3 and erected coaxially with the combustion tube 1. Together with the bell part 3, it constitutes a mixing pipe. They are placed facing each other.

Reference numeral 16 is a nozzle that supplies gas toward the bell portion 3 and uses its jetting force to suck in combustion air.

Reference numeral 17 denotes a guide cylinder fixed to the stepped portion 8 and serving as a guide body vertically installed coaxially with the mixing cylinder 14. The guide cylinder 17 has an air supply passage 18 between it and the combustion cylinder 11, and a mixing cylinder between it and the mixing cylinder 14. A reversing passage 19 is formed which communicates with the upper opening 15 of the cylinder 14, and the hanging end 20 thereof is located in the middle of the bell portion 3 and at a distance from the lower support plate 1, and is connected to the reversing passage 19. Air supply passage 18
It communicates with

Next, we will explain the operation of the gas burner of this invention.
Gas is ejected into the bell part 3 from the mass nozzle 16, and combustion air is sucked into the bell part 3 from the surroundings by the ejection force.

The second gas and air are mixed in the mixing cylinder 14 and rise from the upper opening 15 toward the cone portion 6.

Then, the air-fuel mixture smoothly sent out in the circumferential direction by this cone portion 6 reverses and descends in the reversing passage 19.
The air is smoothly sent out in the circumferential direction along the curved surface of the outer wall of the bell portion 3, turns around again, reaches the air supply passage 18, and is sequentially ejected from the lower part of the combustion cylinder 11 and burned.

That is, since the air-fuel mixture is once reversed and then supplied from the lower part of the combustion tube 11, the injection force that becomes the upward force is suppressed during that time, and the air-fuel mixture is supplied approximately evenly in the upper and lower positions of the combustion tube 11, and the air-fuel mixture is supplied from the lower part of the combustion tube 11. No. 11 has less uneven combustion.

Further, even if the bell portion 3 and the mixing cylinder 14 are not properly fixed, gas will not leak from the mixing cylinder 14 to the reversing passage 19 side due to the suction effect and to the outside.

In this way, the exhaust gas after combustion in the combustion tube 11 flows through the exhaust passage 1.
2 and is discharged from the exhaust port 13.

In this way, the gas burner according to the present invention consists of a combustion tube with a combustion surface formed around it and a closed upper end, a mixing tube with an open end disposed coaxially within the combustion tube, and the mixing tube and the combustion tube. The upper end is closed and the lower end is open, and an inverted passageway is disposed between the mixing tube and the mixing tube and communicates with the upper end opening of the mixing tube, and an air supply passageway is formed between the combustion cylinder and the combustion tube and communicated with the lower end of the inverted passageway. The air-fuel mixture supplied from the tip of the mixing tube is reversed and goes down the reversing passage, then reversed again at the lower end of the guide tube, ascends the air supply passage, and flows to the bottom of the combustion tube. It ejects and burns in sequence.

Therefore, the air-fuel mixture is reversed once and the injection force is suppressed, and since air is supplied from the lower part of the combustion tube, the air-fuel mixture is supplied substantially evenly at the upper and lower positions of the combustion tube, reducing uneven combustion.

Furthermore, since the guide tube is provided coaxially with the mixing tube, the height of the gas burner does not need to be increased.

Furthermore, by inverting the air-fuel mixture once, the primary air and gas can be mixed well and stable combustion can be achieved, which has great practical effects.

[Brief explanation of the drawing]

The figure is a longitudinal sectional view of a gas burner according to the present invention. 1... lower support plate, 3... bell part, 5...
... Upper support plate, 11 ... Combustion tube, 14.
...Mixing tube, 17...Guide tube, 19.
...Reverse passage.

Claims (1)

[Scope of utility model registration request] A combustion tube with a combustion surface formed around it and a closed top end, a mixing tube with an open top end coaxially arranged within the combustion tube, and a mixing tube arranged between the mixing tube and the combustion tube. A gas burner having a closed upper end and an open lower end guide cylinder forming a reversing passage communicating with the upper end opening of the mixing tube and an air supply passage communicating with the lower end of the reversing passage between the combustion cylinder and the combustion cylinder.