JP2556301Y2 - Flame holding device for gas 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 flame holding device for a gas burner, and more particularly, to a gas burner having a plate-shaped flame opening face plate and having a high load and a high air ratio.

[0002]

2. Description of the Related Art In a high-load, high-air-ratio gas burner provided with a plate-shaped flame port face plate, the flames of each port group heat each other to increase the temperature and increase the combustion speed.

[0003]

However, since there is no flame adjacent to only one side of the flame with respect to the outer peripheral flame hole in the flame surface plate, the temperature is hardly increased, and as a result, the mixture (raw gas and combustion) If the flow rate of air mixed with air for use increases or the air ratio rises, a lift phenomenon occurs in the flame on the outer periphery, causing incomplete combustion or generating a lift sound, Present.

[0004] The problem of the present invention is to eliminate such disadvantages.

[0005]

Means for Solving the Problems In order to achieve the above object, a flame holding device for a gas burner according to the present invention comprises
By arranging a flame face plate in a casing, it is divided into a mixing chamber and a combustion chamber, and a required number of flame stabilizers are arranged in a fixed width area including a periphery of the flame face plate, and a series of flame stabilizers is formed. A required number of main flame ports are arranged inside, and the raw gas and the pressurized air are mixed in the mixing chamber, and the mixture is transferred from the main flame port and the flame holding flame port in the flame port face plate into the mixing chamber. In the flame stabilizing device for a gas burner which is ejected toward the combustion chamber side of the flame opening face plate,

[0006] At least the combustion chamber side of the flame port face plate has a horizontal plane up to an edge portion, and the required number of flame retaining ports are independent of each other. The flame stabilizing port is formed only of the flame stabilizing port, and the cross-sectional area of the outlet of the flame stabilizing port is larger than the cross-sectional area of the inlet of the flame stabilizing port.

[0007]

The flame stabilizing device for a gas burner according to the present invention is configured as described above, so that a flame stabilizing port can be provided at any position of the flame stabilizing face plate, and a gas mixture flowing out of these flame stabilizing ports is provided. Can be made lower than the flow rate of the air-fuel mixture flowing into the flame holding flame outlet.

The flow rate of the air-fuel mixture flowing out of the flame holding flame outlet can be reduced even if a small cylindrical hole is provided on the inflow side of the flame holding flame opening.

Further, the inner wall surface of the flame holding flame outlet may be tapered.

[0010]

In FIG. 1, reference numeral 1 denotes an outer shell of a gas burner G (corresponding to the "casing" of the present invention);
(Corresponding to the "casing" of the present invention). The inner shell 2 is fixed to the inner wall surface of the outer shell 1 by welding via a step 21. Reference numeral 3 denotes a support frame, which is screwed while being placed on the step 21 of the inner body 2 via the packing 31. The support frame 3 supports a peripheral end of the ceramic fired face plate 4. Reference numeral 5 denotes a holding frame, which is fastened together with the support frame 3 to the step portion 21 of the inner body 2 with screws while holding the flame port face plate 4 via the packing 41.

Next, reference numeral 61 denotes a mixing chamber, which is disposed in the inner body 2 below the flame face plate 4. In the mixing chamber 61, the raw gas supplied from the nozzle 7 and the combustion air supplied from the blower 8 are mixed.
The mixed gas mixture is pressure-equalized by the pressure equalizing plate 9, flows out from the flame port of the flame face plate into the combustion chamber 62, and is burned.

In FIG. 2, reference numerals 42, 42,... Denote main flame ports, which are formed inside the flame face plate 4. The main flame port 42 is a cylindrical through hole, and the inner diameter is substantially constant. Reference numerals 43, 43, ... denote flame holding flame ports, which are formed in a frame shape on the peripheral edge of the flame port face plate 4. The flame holding flame port 43 has a cylindrical large-diameter hole 431 on the outlet side and a cylindrical small-diameter hole 432 on the inlet side. Large diameter hole 431
Is substantially equal to the inner diameter of the main flame port 42, but the inner diameter of the small diameter hole portion 432 is smaller than the inner diameter of the main flame port 42. That is, the cross-sectional area of the outflow port of the flame holding flame port 43 is larger than the cross-sectional area of the inflow port of the flame holding flame port 43. As a result,
The flow rate of the air-fuel mixture flowing out of the flame stabilizing port 43 can be made lower than the flow rate of the air-fuel mixture flowing out of the main flame port 42.

The large-diameter hole 43 in the flame holding flame outlet 43
The tapered portion as shown in FIG. 2 may be provided in the continuous portion between the first hole 1 and the small diameter hole portion 432, or may not be provided as shown in FIG. Also,
As shown in FIG. 3, the inner wall surface of the flame holding flame port 43 may be provided in a tapered shape.

[0014]

The flame stabilizing device for a gas burner according to the present invention is divided into a mixing chamber and a combustion chamber by arranging a flame face plate in a casing, and is required in a fixed width area including the periphery of the flame face plate. A required number of main flame ports are arranged inside the series of flame flame ports, and raw gas and pressurized air are mixed in the mixing chamber. In the flame holding device for a gas burner, which is jetted from the main flame port and the flame holding flame port in the face plate toward the mixing chamber and burns on the combustion chamber side of the flame port face plate,

[0015] At least the combustion chamber side of the flame port face plate has a horizontal plane up to an end portion, and the required number of flame retaining ports are independent of each other. Since the cross-sectional area of the outlet of the flame stabilizing port is made larger than the cross-sectional area of the inlet of the flame stabilizing port, the flame stabilizing port is provided at any position of the face plate. In addition, the flow rate of the air-fuel mixture flowing out of the flame holding flame outlet can be made lower than the flow velocity of the air-fuel mixture flowing into the flame holding flame opening.

Therefore, by using this gas burner flame stabilizing device, it is possible to arrange the flame stabilizing flame ports at any position on the flame port face plate at an arbitrary width, so that the applicable range of the gas burner flame stabilizing device is expanded. While increasing the flow rate of the mixture (a mixture of raw gas and combustion air)
Even if the air ratio rises, since the lift phenomenon is unlikely to occur in each flame at the flame holding flame in the flame face plate,
Incomplete combustion is less likely to occur and lift noise is less likely to occur. As a result, good combustion can be easily ensured over the entire face plate.

The flow rate of the air-fuel mixture flowing out of the flame holding flame outlet can be reduced even if a small cylindrical hole is provided on the inflow side of the flame holding flame opening.

Further, the inner wall surface of the flame holding flame outlet may be tapered.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a flame holding device for a gas burner according to the present invention.

FIG. 2 is an enlarged sectional view of a portion 11 in FIG.

FIG. 3 is a diagram of another embodiment corresponding to FIG. 2;

FIG. 4 is a diagram of still another embodiment corresponding to FIG. 2;

[Explanation of symbols]

 G ... gas burner 1 ... outer shell (casing) 2 ... inner shell (casing) 4 ... flame port face plate 42 ... main flame port 43 ... flame holding flame port 432 ... small diameter hole 61 ... mixing chamber 62 ... combustion chamber

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Makoto Hasegawa 1370 Kadoya, Hamaoka-cho, Ogasa-gun, Shizuoka Pref.

Claims (3)

(57) [Scope of request for utility model registration] 1. Placing a flame face plate in a casing
Into a mixing chamber and a combustion chamber.
To place the required number of flame stabilizing ports in a fixed width area including the edge
The required number of main flame outlets are arranged inside this series of flame holding flame outlets
Mixing the raw gas and pressurized air in the mixing chamber,
The mixture is supplied to the main flame port and the front of the flame port face plate.
The flame is spouted from the flame outlet toward the mixing chamber,
Flame holding for gas burner burned on the combustion chamber side of the flame face plate
In the apparatus, at least the combustion chamber side of the flame face plate is filled with water up to an edge.
It is planar and the required number of flame holding
And the periphery of the outlet of the flame holding flame outlet is
This flame is formed by only the flame face plate
The cross-sectional area of the outlet of the flame outlet is the cross-sectional area of the inlet of the flame holding flame outlet
Flame holding device for gas burners characterized by being larger than
Place . 2. A flame holding device for a gas burner according to claim 1, wherein a small cylindrical hole is provided on an inflow side of said flame holding flame opening. 3. A flame holding device for a gas burner according to claim 1, wherein an inner wall surface of said flame holding flame opening is formed in a tapered shape.