JPH0356732Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> This invention relates to a burner for gas appliances provided with an inner flame port.

<Prior Art> As burners for gas stoves and the like, burners in which a burner head is formed by combining a burner base and a burner top are generally used. This burner head has a mixture chamber inside that communicates with the mixing tube, and multiple flame ports are arranged around the outer periphery, and an inner flame port is also provided in the center to improve heat balance. There is also. The burner head equipped with this inner flame opening has an annular shape with an air passage penetrating vertically in the center for supplying secondary air to the inner flame opening. Kaisho
Various measures have been taken to deal with falling broth, such as No. 54-117945 and Utility Model Application Publication No. 60-66926.

<Problems to be solved by the invention> The above-mentioned Utility Model Application Publication No. 131307/1987 has a removable soup tray at the bottom of the burner head, and is not suitable for so-called system kitchens in which the top plate cannot be removed. Not suitable. Also, Utsukai Showa 54-
No. 117945 is equipped with a cap that covers the top of the air passage, but since the inner flame opening opens upward, there is a possibility that the boiling liquid may fall directly into the inner flame opening and clog the inner flame opening. . Furthermore, Utility Model No. 60-66926 is
The cap itself that covers the top surface of the air passage is a small burner head for the inner burner port, and although it can prevent the broth from falling into the inner burner port, it requires a mixing pipe exclusively for the inner burner port, and the structure is complicated. Become.

This invention was developed in view of these problems, with the aim of providing a burner for gas appliances that has a simple structure and is suitable for use in system kitchens.

<Means for solving the problem> In order to achieve the above-mentioned purpose, in this invention,
In the annular burner head, which is a combination of a burner base and a burner top, a mixture passage opened on the upper surface of the burner top is provided, and a cap is provided to cover the mixture passage and the upper surface of the air passage. An air outlet and an inner flame opening are respectively formed on the outer periphery of the cap.

<Function> The air outlet and the inner flame opening are each formed on the outer periphery of the cap, and the top surface is covered by the cap, so that the dropped boiling liquid flows through the inner flame opening and the secondary air outlet for the inner flame opening into the gas appliance. The burner does not enter the deep part of the burner, making it suitable for use in system kitchens where the top plate cannot be removed.Furthermore, the burner is equipped with an inner flame opening and provides a well-balanced burner.

<Example> Next, one embodiment shown in the drawings will be described.

In the figure, reference numeral 1 denotes an annular burner head formed by combining a burner base 2 and a burner top 3, and an air passage 4 passing vertically is provided in the center.

The burner top 3 has a shape that matches the burner base 2, and has a plurality of radial slits on the lower edge of its outer periphery, so that when combined with the burner base 2, a plurality of vertically elongated flame ports 5 are formed on the outer periphery. Furthermore, by combining both members, a mixture chamber 6 communicating with a mixing pipe (not shown) is formed inside, and a plurality of mixture passages 7 communicating with this mixture chamber 6 are further formed. It is open at the top. The plurality of flame ports 5 are not arranged at regular intervals, but are arranged so that small intervals A and large intervals B are arranged alternately, and the lower surface of the burner top 3, which is the inlet part of each flame port 5, and the burner base 2 On the top of the
An inclined conical surface that coincides with the extension line of the upper and lower surfaces of the burner port 5 is provided, and guide portions 8 and 9 having substantially the same length as the length of the burner port 5 are formed, respectively.

Reference numeral 11 denotes a kiff arranged on the upper surface of the burner top 3 to cover the upper surface of the air passage 4 and the mixture passage 7. By engaging the engaging portion 12 with the protrusion 10 provided on the burner top 3, the burner top 3 is placed at a predetermined angle on the top surface of the cap 1
1 is provided with a U-shaped partition wall 13 that opens toward the outer circumference corresponding to the air-fuel mixture passage 7 and a partition wall 14 that divides the inside of the partition wall into two. The protrusion 16 is in contact with the upper surface of the burner top 3, and due to the combination of the burner top 3 and the cap 11, the inner flame opening 17 and the air outlet 18 are arranged between the protrusions 16 on the outer periphery of the cap 11. each formed.

This embodiment has the configuration described above, and the air-fuel mixture and air flow as follows. Note that the flow of the air-fuel mixture is shown by solid line arrows, and the flow of air is shown by broken line arrows.

That is, the mixture supplied from the mixing tube heads from the mixture chamber 6 to each flame port 5, and a part of the mixture passes through the mixture passage 7 and heads to the inner flame port 17. When the air-fuel mixture directed toward the flame port 5 is combusted, the two flame ports 5 lined up with a small interval A form a set, and the mixture is combusted while mainly taking in secondary air from the part with the large gap B. The flame becomes stable. In other words, when the flame is high, a pair of flame ports 5 help each other to burn without causing a lift phenomenon, and even when the flame is reduced to low, the two flame holes 5 come together as a single unit, effectively creating a burner with a large area. The combustion state is like that of a single flame port, and the flame becomes difficult to extinguish, making it possible to narrow down the firepower to a smaller area than in the conventional case where flame ports are arranged at equal intervals. Incidentally, in this example, the width a of the flame ports 5 is 1.8 mm, the interval A is approximately 4.3 mm, and the interval B is approximately 6.4 mm, which is the maximum width of the conventional flame ports arranged at equal intervals. While the minimum heating power ratio was 4:1, in this example, a heating power ratio of 7:1 was obtained. In addition, the interval A
may be made smaller if there are no processing restrictions, but this value is the minimum value for the interval B in terms of intake of secondary air, and good combustion conditions cannot be obtained with intervals smaller than this. It was difficult.

Furthermore, when controlling the direction of fluid with a nozzle, it is known that from a hydrodynamic point of view it is desirable to make the length of the nozzle at least 6 times the width. In the flame port 5, the length b is more than 6 times the width a, and the nozzle effect is exerted in the direction in the horizontal plane of the mixture discharged from the flame mouth 5, and the discharge is performed stably in a radial direction. be exposed. However, in the vertical direction, since the vertical dimension c of the flame port 5 is large, the nozzle effect is not exhibited and the directions are uneven, and the flame is disordered and lift is likely to occur, resulting in unstable combustion. In this case, guide portions 8 and 9 are formed at the inlet portion of each flame port 5, and these act to increase the effective nozzle length d in the vertical direction, thereby stabilizing the vertical discharge direction of the air-fuel mixture. As a result, good combustion conditions can be obtained.

On the other hand, when the air-fuel mixture directed toward the inner flame port 17 is combusted, the protrusion 16 of the cap 11 acts as an air guide, and the air-fuel mixture is released from the inner flame port 17 in a radial direction. The secondary air is blown into the air-fuel mixture to ensure good combustion. Note that in this embodiment, the inner sore opening 17
The width of the inner flame outlet is 1.8 mm, and the thickness of the partition wall 14 is 2 mm.As in the case of the flame outlet 5, there are two inner flame outlets 17 arranged closely on both sides of the partition wall 14, or a set, ensuring stable combustion. state.

The cap 11 covers the upper surfaces of the air passage 4 and the mixture passage 7, so that even if the boiling liquid were to fall, it will not flow through the inner flame opening 17 and enter the depths, and will not reach the vicinity of the inner flame opening 17. Since the boiling liquid that has adhered to the cap can be easily cleaned by removing the cap, it can be safely used in system kitchens, etc. whose structure does not allow cleaning the inside.

<Effects of the invention> As is clear from the above-mentioned embodiments, this invention provides a mixture passage which is open on the upper surface of the burner top, and a cap that covers the mixture passage and the upper surface of the air passage. In combination with this, an air outlet and an inner flame opening are respectively formed on the outer periphery of the cap.

Therefore, sufficient secondary air can be supplied to the flame at the inner flame port, there is no need for a separate mixing pipe for the inner flame port, and even though the inner flame port is provided, the boiling liquid that has fallen into the inner flame port can be It is possible to reliably prevent the secondary air from entering the back of the gas appliance from the secondary air outlet for the flame opening and the internal flame opening, and it has a good heat balance because it has an internal flame opening.
Furthermore, it is possible to obtain a burner with a relatively simple structure that is suitable for use in system kitchens where the top plate cannot be removed.

[Brief explanation of drawings]

FIG. 1 is a sectional view of an embodiment of this invention, FIG. 2 is a plan view of the burner top, FIG. 3 is a perspective view showing the main parts of the cap, and FIG. 4 is an explanatory diagram of the arrangement of the burner port. 1... Burner head, 2... Burner base, 3
...burner top, 4...air passage, 5...flame port, 6...mixture chamber, 7...mixture passage, 11...
...Cap, 17...Inner flame opening, 18...Air outlet.

Claims (1)

[Scope of utility model registration request] The burner base and burner top are combined to form a mixture chamber inside and a flame port on the outer periphery, and the annular burner head has an air passage in the center that passes through the top and bottom, and an air mixture that opens on the top surface of the burner top. A gas appliance having a passage and a cap covering the upper surface of the mixture passage and the air passage, and forming an air outlet and an inner flame opening on the outer periphery of the cap by combining the burner top and the cap. Burna.