JP2581721Y2 - Gas burner structure - 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 structure for a gas table stove, and more particularly, to a gas mixture outlet portion of a burner body constituting a gas burner and a flame outlet of a burner head. The present invention relates to a gas burner structure provided with an air-fuel mixture adjusting plate that distributes pressure, prevents sticking between a burner head and a burner body, and reduces fire suppression noise.

[0002]

2. Description of the Related Art Conventionally, a gas burner in a gas table stove has been composed of a burner body and a burner head. The burner body has a horizontal portion and a vertical portion, and some inexpensive products are formed by pressing a stainless steel plate. Others are manufactured by casting, and the burner head is manufactured by forging brass.

A configuration of a conventional gas burner will be described with reference to FIG. Here, FIG. 5 is an explanatory view showing a schematic configuration of a conventional gas burner (cast article). Combustion gas and primary air for combustion are introduced from the base formed at the end of the burner body horizontal mixing pipe 52, and the burner body horizontal mixing pipe 5 is introduced.
A combustion air-fuel mixture G is generated in a mixing section formed at the center of the fuel cell 2. The generated air-fuel mixture G for combustion is uniformly supplied to the entire air-fuel mixture outlet formed in a donut shape in plan view at the upper end of the vertical portion of the burner body through the mixing chamber 53 formed in the vertical portion of the burner body. . The supplied combustion air-fuel mixture is blown into the air-fuel mixture outlet of the burner body from a flame port formed in a peripheral portion of the burner head fitted from above, and installed near the air-fuel mixture outlet. It is ignited by the ignition device and starts burning.

At this time, in order to obtain a uniform combustion flame,
As described above, it is necessary to distribute the combustion air-fuel mixture G supplied from one direction uniformly over the entire air-fuel mixture outlet. For this reason, in the conventional gas burner, as shown in FIG. 5, an uneven wall portion 54 in which the air-fuel mixture supply side wall of the inner peripheral edge 51 at the air-fuel mixture outlet port formed in the vertical portion of the burner body is uneven to the air-fuel mixture supply side T. By reducing the volume of the pressure equalizing chamber 53a on the air-fuel mixture supply side and increasing the volume of the pressure equalizing chamber 53b on the diagonal side of the air-fuel mixture supply, or
By ensuring a long (high) vertical portion, diffusion of the combustion air-fuel mixture has been promoted, and the pressure distribution of the combustion air-fuel mixture has been dealt with.

[0005]

However, in the above-described conventional gas burner, the wall of the inner peripheral edge 51 of the air-fuel mixture outlet in the vertical portion of the burner body is made uneven to distribute the air-fuel mixture for combustion evenly. The problem is dealt with by forming the uneven thickness portion 54. For this reason, before manufacturing the burner body, the internal structure of the burner body is determined so that the optimum distribution of the mixed air pressure is obtained, and the die is set up. The inner peripheral edge 51 had to be cast with uneven wall thickness. Therefore, after casting of the burner body, the distribution of the mixed air pressure for combustion cannot be easily changed, and the versatility of the burner body is lacking, and the distribution of the mixed air pressure is finely changed to meet individual purposes. There was a problem that a gas burner could not be provided.

In order to distribute the combustion air-fuel mixture at a uniform pressure, a method of increasing the length of the vertical portion of the burner body to increase the height is used to uniformly distribute the air-fuel mixture to obtain a uniform partial pressure of the air-fuel mixture. Therefore, there is a problem that a product having a gas burner such as a gas stove becomes tall, and the use of the gas burner is limited.

In general, since the burner body is manufactured by casting, the fitting portion between the burner head and the burner body is rusted due to aging, spilling, etc., or the spilling, spilling, etc. are caused by the combustion heat of the gas burner. There has been a problem that it is fixed by the scorching or becomes difficult to attach and detach, making daily cleaning and maintenance and inspection at the time of failure difficult.

Further, a continuous space extends from the gas mixture outlet to the mixing portion, and when the combustion of the gas burner is stopped, the gas mixture corresponding to the space volume remains. Therefore, when the combustion of the gas burner is stopped, the combustion flame is sucked into the burner body mixing chamber and the mixing pipe, ignites the remaining air-fuel mixture, and instantaneously burns (backs) all the air-fuel mixture. There was a problem that the sound (explosion sound) was loud.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem. It is an object of the present invention to easily achieve a uniform pressure distribution of a combustion air-fuel mixture and a distribution of a combustion air pressure. The state can be easily changed according to the purpose, and it is possible to prevent rusting or sticking at the fitting part of the burner body and the burner head caused by aging or boiling over, and further, when extinguishing the gas burner. An object of the present invention is to provide a gas burner structure capable of reducing a fire extinguishing sound.

[0010]

In order to achieve this object, a gas burner structure according to the present invention comprises a base into which a combustion gas and primary air for combustion are introduced, and a base for introducing the combustion gas and primary air for combustion. A mixing section for mixing, a burner body having a donut-shaped mixture outlet port for leading out the mixture generated in the mixing section, and a burner body fitted to the mixture outlet port of the burner body; A burner head provided with a plurality of flame ports for discharging a mixture of the mixed combustion gas and the primary air for combustion, and a mixture discharge port portion of the burner body close to the flame port of the burner head. The air-fuel mixture adjusting plate has a bent fitting piece formed along an inner peripheral edge thereof, and the bent fitting piece is provided on an inner peripheral edge of the air-fuel mixture outlet of the burner body. Fitted and fitted Chakuhen comprises a structure that is interposed between the gas mixture outlet mouth rim and the fitting portion formed in the burner head of the burner body.

[0011] The air-fuel mixture adjusting plate may be provided with a ventilation surface so that the area of the air-flow opening of the air-fuel mixture is reduced in a region where the air-mixing pressure is high, and the area of the air-opening of the air-fuel mixture is increased in a region where the air-fuel mixture is low. You may provide as a structure that a mouth is provided coarsely and densely.

[0012]

According to the gas burner structure of the present invention having such a structure, the combustion gas and the primary air for combustion are introduced from the base formed in the burner body, and the introduced combustion gas and the primary air for combustion are introduced. Are mixed in a mixing section formed in the burner body to become a combustion air-fuel mixture. The air-fuel mixture generated in the mixing section is led out between the burner body and the burner head through a fuel-air mixture adjusting plate provided in a donut-shaped air-fuel mixture outlet formed in the burner body. The burner head is fitted to an air-fuel mixture outlet of the burner body, and an air-fuel mixture of the combustion gas mixed in the burner body and the primary air for combustion is supplied to a large number of flames provided on the periphery of the burner head. Spouts from mouth.

The air-fuel mixture adjusting plate provided at the air-fuel outlet of the burner body is fitted to the inner peripheral edge of the air-fuel outlet by a bent fitting piece formed along the inner peripheral edge thereof. The attachment piece is sandwiched between the inner peripheral edge of the air-fuel mixture outlet and the fitting portion formed on the burner head. Therefore, even if the burner body rusts, it does not adhere to the burner head, and a state in which the burner body is easily detachable is always maintained.

Further, the air-fuel mixture adjusting plate has a ventilation hole on its plate surface so that the area of the air-flow opening of the air-fuel mixture is reduced in a region where the air-mixing pressure is high, and the area of the air-opening of the air-fuel mixture is increased in a region where the air-fuel mixture is low. Is provided densely, it becomes possible to uniformly distribute the mixed pressure. Furthermore, since the air-fuel mixture adjusting plate is provided near the air-fuel mixture outlet of the burner body and divides the burner body filled with the air-fuel mixture, the fire extinguishing noise generated when extinguishing the gas burner can be significantly reduced.

[0015]

FIG. 1 shows a gas burner embodying the present invention.
This will be described in detail with reference to FIGS. FIG. 1 is an exploded perspective view of a gas burner to which the present invention is applied, FIG. 2 is a longitudinal sectional view of a gas burner structure, FIG. 3 is a plan view of an air-fuel mixture adjusting plate according to a first embodiment, and FIG. It is a top view of such an air-fuel mixture adjustment plate. First, the structure of the gas burner will be described. The burner body B is composed of a cylindrical horizontal portion BH made of a casting and a vertical portion BV having a donut shape in a plan view. At one end of the horizontal portion, a nozzle N for supplying combustion gas is provided penetrating a central portion. An air conditioner 1 for adjusting an intake air amount of the primary air for combustion to be sucked is fitted, and a mixing part for mixing a combustion gas and a primary gas for combustion to generate a fuel-air mixture in the center of a horizontal portion. A portion M is formed. The other end of the horizontal portion rises rapidly to form a vertical portion BV.

The vertical section BV is provided with a pressure equalizing chamber 2 for diffusing the supplied combustion air-fuel mixture to obtain a uniform pressure of the combustion air-fuel mixture.
A mixture outlet port 3 having a donut shape in plan view is formed at the upper end thereof. The air-fuel mixture outlet 3 receives an outer peripheral edge 5 having an inclined surface 4 for receiving a combustion air-fuel mixture obliquely upward while receiving a large number of flame ports 22 formed on the peripheral edge of a burner head H described later. An inner peripheral edge 8 formed with a fitting portion 7 for receiving the fitting portion 20 formed on the burner head H for fitting the burner head H. In addition, the air-fuel mixture outlet 3 is fitted with an air-fuel mixture adjusting plate 30 that does not exist in the past on the inner peripheral edge 8 of the air-fuel mixture outlet 3.

The burner head H made of brass fitted from above the mixture outlet 3 has a donut shape in a plan view, and its central portion hangs down to hang down.
A fitting portion 20 for fitting with the fitting portion 7 formed on the inner peripheral edge 8 of the air-fuel mixture outlet 3 is formed on the side peripheral edge 21 of the outer peripheral edge 5 formed on the mixture outlet 3. A large number of flame ports 22 are formed to blow out the combustion air-fuel mixture to form a combustion flame. In addition, a plurality of flame ports 23 are formed to form a combustion flame on the upper surface of the burner head H.
Are formed.

The mixture adjusting plate 30 is formed by pressing a plate made of stainless steel having a donut shape in a plan view and having a disk portion 31 and a fitting portion 32. The fitting portion 32 includes a bent fitting piece 34 formed at the center of the mixture control plate 30, whereby the mixture control plate 30 is attached to the inner peripheral edge 8 of the mixture outlet 3.
Is fitted to. The disk portion 32 is provided with a large number of circular holes 33 for allowing the air-fuel mixture supplied from the pressure equalizing chamber 2 to pass therethrough. It is perforated to have a small area, and is gradually and densely perforated toward the diagonal of the air-fuel mixture supply side, or is perforated to have a large hole area.

Next, the operation of the gas burner structure while following the flow of the combustion gas and the combustion primary air will be described. When the combustion gas is supplied from the nozzle N disposed at one end of the burner body horizontal portion BH, the primary air for combustion also disposed at one end of the burner body horizontal portion is generated by the negative pressure caused by the combustion gas flow. It is sucked into the burner body through the air amount regulator 1. At this time, the amount of primary air for combustion taken in is adjusted by the air amount regulator 1 to obtain an optimum amount of air. The sucked primary air for combustion and the supplied combustion gas are mixed with each other in a mixing section M formed at the center of the burner body horizontal section BH to generate a combustion air-fuel mixture. The generated air-fuel mixture for combustion is fitted to the inner peripheral edge 8 of the air-fuel mixture outlet 3 while spreading over the entire air-fuel outlet 3 when passing through the equalizing chamber 2 formed in the burner body vertical portion BV. To the air-fuel mixture adjusting plate 30.

Here, a number of circular holes 33 are formed in the disk portion 31 of the mixture control plate 30, and the circular holes 33
The air-fuel mixture supply side S is coarsely formed, and the circular holes 33 are gradually formed denser toward the diagonal of the air-fuel mixture supply side. Therefore, it is difficult for the air-fuel mixture to pass through the air-fuel mixture adjusting plate 30 on the air-fuel mixture supply side S, and the air-fuel mixture is supplied to the inclined portion 4 formed on the outer peripheral edge 5 of the air-fuel mixture outlet 3. The combustion air-fuel mixture that has not been supplied is diffused in the pressure equalizing chamber 2 toward the diagonal side of the air-fuel mixture supply side. At this time, the combustion air-fuel mixture easily passes through the air-fuel mixture adjustment plate 30 because the circular holes 33 of the air-fuel mixture adjustment plate 30 are densely formed on the diagonal side of the air-fuel mixture supply side. It is easily supplied to the inclined portion 4 formed on the outer peripheral edge 5 of the outlet 3.

As described above, by observing the entire burner body by uniformly diffusing the combustion air-fuel mixture, a high air-pressure mixture is usually suppressed at the air-fuel mixture supply side S, and the diagonal of the air-fuel mixture supply side is generally suppressed. In addition, a low mixing pressure is increased to obtain a uniform mixing pressure as a whole.

The bent fitting piece 34 of the air-fuel mixture adjusting plate 30 fitted to the inner peripheral edge 8 of the air-fuel mixture outlet 3 is provided with the fitting part 7 of the burner body B and the fitting part 20 of the burner head H. , So that even when the spilled juice falls along the burner head H, it does not adhere to the burner body B, thereby preventing rust on the burner body B and preventing the burner body B from rusting.
Does not adhere to the burner head H even if rust occurs on the surface.

The combustion air-fuel mixture equalized by the air-fuel mixture adjusting plate 30 is formed on the inclined portion 4 formed on the outer peripheral edge 5 of the air-fuel mixture outlet 3 and the peripheral edge 21 of the burner head H. The gas flows into the flame port 22 formed by the flame groove, blows out of the gas burner, and is ignited by an ignition device (not shown) installed near the mixture outlet to start combustion.

Finally, when the use of the gas burner is completed and the supply of the combustion gas is stopped to stop the combustion of the gas burner, generally, the combustion flame is sucked into the burner body, and the combustion mixture remaining in the mixing section M and the like is generally removed. A back phenomenon occurs where a fire is extinguished and a fire extinguishing sound (explosion sound) is generated. It is known that the fire extinguishing noise generated at this time increases in proportion to the size of the volume filled with the combustion air-fuel mixture.

Therefore, in the gas burner according to the present embodiment, the space volume in which the combustion air-fuel mixture remains is divided into two parts by the air-fuel mixture adjusting plate 30, and the combustion air-fuel mixture remaining above the air-fuel mixture adjusting plate 30 is first burned. Subsequently, the combustion air-fuel mixture remaining below the air-fuel mixture adjusting plate 30 was burned. Therefore, the fire extinguishing noise can be significantly reduced as compared with the case where all the residual air-fuel mixture is burned at once. However, since the air-fuel mixture adjusting plate 30 is provided with a circular hole 33 having a relatively small hole area and the air flow of the air-fuel mixture for combustion is adjusted by the density thereof, the combustion flame returns to the lower portion of the air-fuel mixture adjusting plate 30. Few things .

Next, a second embodiment in which a rectangular hole 43 is formed in the mixture adjusting plate 40 will be described with reference to FIG. FIG. 4 is a plan view of an air-fuel mixture adjusting plate according to the second embodiment. Since the configurations of the burner body B and the burner head H are the same as those of the first embodiment, the description will be omitted, and only the configuration and operation of the air-fuel mixture adjusting plate 40 will be described.

The air-fuel mixture adjusting plate 40 according to the second embodiment is formed by pressing a plate made of stainless steel having a donut shape in plan view and having a disk portion 41 and a fitting portion 42. Fitting part 4
2 is provided with a bent fitting piece 44 formed in a substantially U-shape at the center of the air-fuel mixture adjusting plate 40, whereby the air-fuel mixture adjusting plate 40 is fitted to the inner peripheral edge 8 of the air-fuel mixture outlet 3. . A plurality of rectangular holes 43 are formed in the disk portion 32 for changing the opening area of the combustion mixture supplied from the pressure equalizing chamber 2. The hole is drilled so that the hole area gradually decreases toward the diagonal of the air-fuel mixture supply side.

As described above, unlike the first embodiment, the rectangular holes 43 each having a large hole area are provided, and the ventilation amount of the air-fuel mixture for combustion is adjusted according to the size of the opening area.
Although the ability to reduce the fire extinguishing noise generated by the back is inferior to that of the air-fuel mixture adjusting plate 30 of the first embodiment, the air-fuel mixture adjusting plate 40
Thus, the passage loss of the air-fuel mixture for combustion is reduced, so that it is most suitable for, for example, a commercial gas burner requiring a large combustion capacity.

As described in detail above, the gas burner structure according to the present invention is provided with the air-fuel mixture adjusting plates 30 and 40 that are fitted to the inner peripheral edge 8 of the air-fuel mixture outlet port 3.
The burner body B can be cast without uneven thickness of the inner peripheral edge 8 of the burner body vertical portion BV, and the air-fuel mixture can be easily and uniformly distributed by the air-fuel mixture adjusting plates 30 and 40, and the air-fuel mixture can be further adjusted. By changing the shape or distribution of the holes formed in the plates 30 and 40, the distribution of the mixed air pressure can be finely changed according to the purpose.

For example, in the air-fuel mixture adjusting plate 30 used in the first embodiment, the main purpose is to reduce the fire extinguishing noise. The distribution has been adjusted. On the other hand, in the air-fuel mixture adjusting plate 40 used in the second embodiment, the main purpose is to obtain a good distribution of the mixed air pressure without deteriorating the combustion capacity. The distribution of mixed pressure is adjusted by the size of the area.

Further, the fitting portion 7 of the burner body B made of casting is used.
A bent fitting piece 3 of a mixture adjustment plate 30, 40 made of stainless steel between the fitting part 20 of the burner head H made of brass.
Since the burners 4 and 44 are interposed, it is possible to prevent the burner body B from being rusted due to aging and boiling over and becoming rusted and fixed to the burner head H. The head H can be prevented from sticking, so that daily cleaning and maintenance and inspection at the time of failure can be performed very easily.

Further, since the residual air-fuel mixture inside the burner body B is divided into two parts by the air-fuel mixture adjusting plates 30, 40, even if the combustion flame is sucked into the gas burner when the combustion is stopped, the air-fuel mixture adjusting plates 30, 40 are first used. The combustion air-fuel mixture remaining in the upper part burns, and the combustion air-fuel mixture remaining in the lower part of the air-fuel mixture adjusting plates 30, 40 later burns. Therefore, the fire extinguishing noise can be significantly reduced as compared with the conventional product in which the residual air-fuel mixture burns at one time.

It should be noted that the present invention is not limited to the above embodiments, and various modifications can be made without departing from the spirit of the present invention. For example, the shape of the hole formed in the mixture control plate is not limited to a circular hole or a rectangular hole as long as a good pressure equalization condition for the mixture can be obtained. What is necessary is just to diffuse uniformly. Further, the air-fuel mixture adjusting plate is not limited to the stainless steel material, and the object of the present invention is achieved if the metal is excellent in corrosion resistance and easily processed.

[0034]

As is apparent from the above description, the gas burner structure according to the present invention has a mixture adjusting plate for evenly distributing the mixture pressure between the burner body and the burner head. The air-fuel mixture can be easily distributed under uniform pressure, and the distribution of the combustion air-fuel mixture can be easily changed according to the purpose.In addition, the fitting portion between the burner body and the burner head that occurs due to aging or boiling over It has become possible to provide a gas burner structure capable of preventing sticking due to rusting or sticking in the gas burner, and further reducing a fire extinguishing sound generated when extinguishing the gas burner.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a gas burner to which the present invention is applied.

FIG. 2 is a longitudinal sectional view of a gas burner structure.

FIG. 3 is a plan view of an air-fuel mixture adjusting plate in the first embodiment.

FIG. 4 is a plan view of an air-fuel mixture adjusting plate according to a second embodiment.

FIG. 5 is an explanatory view showing a schematic configuration of a conventional gas burner (cast article).

[Explanation of symbols]

 B Burner body M Mixing section 2 Equilibrium chamber 3 Mixture outlet H burner head 20 Fitting section 22 Flame port 30, 40 Mixture adjusting plate 31, 41 Disk section 32, 42 Fitting section 33 Circular hole 34, 44 Flex fitting piece 43 Rectangular hole

Claims (2)

(57) [Scope of request for utility model registration] 1. A base for introducing combustion gas and primary air for combustion, a mixing unit for mixing the introduced combustion gas and primary air for combustion, and a mixture generated in the mixing unit. A burner body having a donut-shaped air-fuel mixture outlet, and fitted to the air-fuel outlet of the burner body to blow out an air-fuel mixture of combustion gas and primary air mixed in the burner body. A burner head having a number of flame ports provided on a peripheral edge thereof, and a mixture control plate provided at a mixture outlet port of the burner body in close proximity to the burn port of the burner head. A bent fitting piece is formed along the inner peripheral edge of the burner body, and the bent fitting piece is fitted and attached to an inner peripheral edge of the air-fuel mixture outlet of the burner body. To the inner periphery of the outlet and the burner head A gas burner structure characterized by being configured to be interposed between the formed fitting portion. 2. The air-fuel mixture adjusting plate has an air-permeable surface for reducing the air-flow opening area of the air-fuel mixture in an area where the air-fuel mixture is high and increasing the air-opening area of the air-fuel mixture in an area where the air-fuel mixture is low. 2. The gas burner structure according to claim 1, wherein the ports are provided densely and densely.