JP3840500B2 - Gas burner for stove - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a structure of a gas stove burner used for home use and business use.
[0002]
[Prior art]
A conventional bunsen burner for a gas stove injects gas from a gas nozzle into a venturi mixing pipe, mixes air and gas from the primary air port attached to the inlet of the mixing pipe in the mixing pipe, and burner cap attached to the burner head In this way, a flame was formed by ejecting from a number of grooves cut in the burner cap.
[0003]
[Problems to be solved by the invention]
In recent years, energy saving has been screamed, and attempts have been made to improve the heat transfer efficiency of the burner by reducing the diameter of the burner cap in the gas burner.
If the outer flame type burner cap is made smaller in diameter, the number of flame holes will decrease, and if the same heat input is attempted, the flame hole load will increase and flame holding will not be possible (lift will be generated), and incomplete combustion will likely occur. . Increasing the flame hole size to increase the flame hole load makes it easier to backfire. Especially when the burner is turned off after using the burner for a long time, the flame is backfired from the overheated burner cap to the mixing tube. Has occurred and has a problem of fearing the user. Also, in the case of the internal flame type, it has to be burned in a limited space, and the same problem has occurred.
[0004]
In order to solve these problems, an object of the present invention is to provide a burner in which the size per flame hole can be designed large and, as a result, the burner cap diameter can be reduced.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the burner according to the present invention does not have a main venturi mixing tube, and the primary air and the fuel gas are mixed in a small flame hole channel provided in the burner cap. Yes.
That is, a method is adopted in which one or several flame holes are assigned to one gas ejection nozzle and burned simultaneously with mixing of gas and primary air.
[0006]
FIG. 1 is a structural diagram of a conventional gas stove burner. FIG. 2 is a structural view of an external flame type gas stove burner according to the present invention. FIG. 3 is a structural view of an internal flame type gas stove burner according to the present invention.
Embodiments of the present invention will be described based on examples with reference to the drawings.
In FIG. 2, a gas nozzle body 8 is fixed inside the gas stove outer box 1 with screws or the like. The gas nozzle body 8 is stepped to receive the burner body 7. The burner body 7 is provided with a flange having a primary air opening. A burner body 7 is inserted into the gas nozzle body 8 and a burner cap 5 is placed on the burner body 7 to form a burner. The fuel gas is injected from the gas injection nozzle 3, mixed with the primary air in the mixed gas flow path 11 in the burner cap 5, and becomes a flame at the crater 10 where it exits from the burner cap. In FIG. 3, the gas nozzle body 8 is fixed inside the gas stove outer box 1 with screws or the like. A fuel gas passage 11 and a gas injection nozzle 3 are opened in the gas nozzle body 8, and are fixed with a burner cap 5 and screws with a packing interposed therebetween. The fuel gas passes through a flow path 9 formed between the burner cap 5 and the burner body 8, and is injected from the gas injection nozzle 3 toward the inside of the burner. It is mixed with primary air in the mixed gas flow path 11 in the burner cap, and becomes a flame at the crater 10 where it comes out of the burner cap. FIG. 4 is an external flame type burner of Example 1 of FIG. 2, an enlarged view of the AA cross section, FIG. 5 is an external flame type burner of Example 2 of FIG. 2, an enlarged view of the AA cross section, FIG. Flame-type burner Example 1 of FIG. 3 is an enlarged view of the BB cross section, FIG. 7 is an internal flame type burner of Example 2 of FIG. 3 and an enlarged view of the BB cross-section.
[0007]
【The invention's effect】
The present invention has the effects described below.
[0008]
The amount of flammable premixed gas that convects in the burner is one-hundredth of that of the conventional Venturi mixing tube system, and there is no fire extinguishing sound due to flashback during fire extinguishing.
[0009]
Since there is no fire extinguishing sound, the size of the flame hole can be increased, and the heat input per flame hole can be increased.
[0010]
Since no fire-extinguishing sound is generated, the primary air ratio can be improved as compared with the prior art, and the flame can be reduced.
[0011]
From the above, the burner cap diameter can be designed small, and as a result, a gas stove with high thermal efficiency can be made.
[0012]
In the internal flame type burner, by providing the primary air port on the upper side, the air inside the stove that has been heated through the outer plate of the stove outer box and the sign holder can be taken in as the primary air. Preheating primary air increases combustion efficiency and thermal efficiency.
[0013]
The conventional burner has one nozzle, but this burner has several dozen nozzles, so the primary air suction efficiency is high, the primary air port can be designed small, and the flame hole channel that is the mixing section The mixing distance can be very short.
[0014]
Regarding the manufacturing cost, the burner according to the present invention eliminates the venturi mixing tube, but there is an increase / decrease such that the number of nozzles increases, so that it can be manufactured at a conventional cost.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing the structure of a conventional gas stove.
FIG. 2 is a longitudinal sectional view showing the structure of an external flame type gas stove using this burner.
FIG. 3 is a longitudinal sectional view showing the structure of an internal flame type gas stove using this burner.
4 is an enlarged view of an AA section in Example 1 of the external flame type burner shown in FIG. 2. FIG.
FIG. 5 is an enlarged view of the AA cross section in Example 2 of the external flame type burner shown in FIG. 2;
6 is an enlarged view of a B-B cross section in Example 1 of the internal flame type burner shown in FIG. 3; FIG.
7 is an enlarged view of a B-B cross section in Example 2 of the internal flame burner shown in FIG. 3; FIG.

Claims (3)

A large number of fuel gas nozzles 3 are provided in the lateral direction at the upper end of the gas nozzle body 8 erected substantially at the center of the stove, and a circular burner body 7 is provided below the nozzle on the downstream side of the fuel gas outlet, and a circular burner is provided on the upper side. The burner cap 5 is disposed in such a manner that the cap 5 is disposed and the gas nozzle body 8 is covered on the burner body 7. A fan-shaped primary air port 12 is provided in the lower part of the nozzle on the downstream side of the nozzle of the burner body 7. There is a space on the nozzle side of the primary air port, and the burner cap 5 has an upper flat plate portion and a mixed gas flow path 11 corresponding to each fuel gas nozzle in a radial direction below the upper flat plate portion. A gas burner for a stove having a nozzle and burner cap structure characterized in that fuel gas is ejected from the nozzle into the mixed gas flow path, and the primary air is taken in through the primary air port and its upper space. . 2. An external flame type burner according to claim 1, wherein a plurality of radial fuel gas nozzles 3 are provided in the lateral direction at the upper end of the gas nozzle body 8 standing substantially at the center of the stove, and the nozzles are provided downstream of the fuel gas outlet of the nozzles. A circular burner cap 5 is disposed above the circular burner body 7 on the lower side, and the burner cap 5 is disposed on the burner body 7 so as to cover the gas nozzle body 8. On the downstream side of the nozzle of the burner body 7, a fan-shaped primary air port 12 is provided in a circular shape at the lower part of the nozzle in common with each nozzle. There is a space on the nozzle side of the primary air port, and the burner cap 5 has an upper flat plate portion and a mixed gas flow path 11 corresponding to each fuel gas nozzle below the upper flat plate portion. The fuel gas is ejected from the nozzle into the mixed gas flow path, the primary air is taken in the primary air port and the space above it, and the two are mixed while passing through the mixed gas flow path and ejected to the outside. A gas burner for a stove with a special venturi function characterized by The burner internal flame type burner according to claim 1, wherein a donut-shaped gas nozzle body 8 and a donut-shaped burner cap 5 are overlapped and fixed with a screw or the like at substantially the center of the stove. The gas nozzle body 8 has a lower flat plate portion and two circular flanges projecting thereon. On the inner flange, the gas injection nozzle 3 is provided with a large number of fuel gas injection nozzles 3 that radiate in the lateral direction toward the inner side. The primary air port 12 having a circumferential shape has a space on the nozzle side of the primary air port. The burner cap 5 has a mixed gas flow path 11 corresponding to each fuel nozzle below the flat plate portion on the upper side and radially below the space. The fuel gas is ejected from the nozzle into the mixed gas flow path, and the primary air is taken in the primary air port and its upper space in the middle, and both are mixed while passing through the mixed gas flow path. A gas burner for a stove with a special venturi function that is characterized by jetting.

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