JPH10267226A - Inward flame burner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent incomplete combustion by inserting a container for receiving juice having a flange part while an overflow port concurrently serving as ventilation port at a position below the upper end of the container to facilitate the treatment of juice boiled over. SOLUTION: Slit-shaped flame holes 3 are provided only at an upper part of the inner circumferential surface 2 of a horizontal ring-shaped burner body 1 having a blowby space 4 at the center thereof. A fuel gas containing primary air with an ideal mixing ratio of 70-100% is supplied inside through a mixing pipe 10. A cylindrical container 5 for receiving juice having a flange part 6 at the upper end thereof is detachably inserted below the flame holes 3 of the blowby space 4 at the center of the inward flame burner 1. In addition, a ventilation port of secondary air and an overflow port 7 concurrently serving as outflow port of the juice excessively boiled over are provided at a position below the upper end of the cylindrical container 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inward flame burner, that is, a ring burner in which a flame is ejected inward.

[0002]

2. Description of the Related Art FIG. 3 shows an example of a conventional burner of this kind. A horizontal ring-shaped burner body 1 having a blow-through space 4 in the center has a flame hole 3 at an upper portion of an inner peripheral surface 2 thereof. A premixed fuel gas containing primary air of 70 to 100% of an ideal mixing ratio is supplied from a mixing pipe 10 into the main body 1. According to this configuration, there is an advantage that the flame is sprayed toward the center of the pan bottom and the thermal efficiency is high because the contact area between the pan bottom and the flame is large, as compared with a burner whose flame holes face outward. An air shielding plate 15 for blocking air is provided below the blow-by space 4. The air shielding plate 15 can prevent the flame from overflowing downward when a pot or the like is placed on the upper side, and can reduce the amount of generated NOx by cutting off the supply of excess oxygen.

[0003]

However, in the above-mentioned conventional construction, there is a problem that boiled juice and dust easily accumulate on the air shielding plate 15. For this reason, for example, FIG.
As shown in (a), the air shielding plate 15 is placed on the engaging projection 11 protruding from the inner peripheral surface 2 of the burner main body 1 so that the air shielding plate 15 can be removed for cleaning or can be removed. As shown in FIG. 2B, the air blocking plate 15 is rotatable around a shaft 16 so as to be easily cleaned.
However, in the configuration shown in FIG. 4 as well, if the spilled juice collected on the air shielding plate 15 is left for a long time, the juice dries and sticks or burns, and the air shielding plate 1
If the removal or rotation of the 5 becomes difficult and cleaning becomes difficult, or if the amount of spillage is large, there is a problem that juice easily enters the main body 1 from the flame hole 3.

On the other hand, the conventional structure shown in FIGS. 3 and 4 has the advantage that the amount of NOx generated can be reduced as described above.
There is a problem that the primary air tends to be insufficient and incomplete combustion is likely to occur. This is because at the base end of the mixing pipe 10 that sucks the primary air, when the cock is squeezed, the injection speed of the fuel gas decreases, so that the amount of the primary air sucked at the ideal mixing ratio at the rated time is the same. This is because suction is not performed at the ratio. Therefore, the present invention is to solve the above-mentioned problems, and to provide a burner structure of this kind which can easily treat boiled juice and can prevent incomplete combustion at the time of a small fire. It is intended for.

[0005]

As shown in FIG. 1, an inward flame burner according to the present invention has a flame hole 3 only at an upper portion of an inner peripheral surface 2 of a horizontal ring-shaped burner main body 1. Then, in the inward flame burner configured to supply the fuel gas containing the primary air of 70 to 100% of the ideal mixing ratio, in the lower part of the center of the burner main body 1 below the flame hole 3 in the blow-through space 4, A juice receiving tubular container 5 having a flange portion 6 at an upper end is detachably inserted, and an overflow port 7 serving also as a ventilation port is provided at a position slightly below the upper end of the cylindrical container 5. To prevent the boiled juice from sticking to or sticking to the periphery of the container 5 to make it difficult for the container 5 to come off, or to prevent the boiled juice from flowing into the burner body 1 from the flame hole 3. , To reduce NOx during rated combustion Through the container 5 with the following air blocking function, at the time of small fire so as to supply a small amount of secondary air, and has a feature in that the king by preventing incomplete combustion. Further, the configuration of claim 5 is provided with a hand 7 so that it can easily attach and detach the heavy cylindrical container 5 which can sufficiently store the boiling water, even if the peripheral portion has sticking or burning. It is.

[0006]

FIG. 1 shows an embodiment of an inward flame burner according to the present invention. A horizontal ring-shaped burner body 1 having a blow-through space 4 in the center thereof has an upper portion of an inner peripheral surface 2 thereof. Are provided with a slit-shaped flame hole 3, and a fuel gas containing 70-100% of an ideal mixing ratio of primary air is supplied through a mixing pipe 10. Below the flame hole 3 of the central blow-through space 4 of the inward flame burner 1, a juice receiving tubular container 5 having a flange portion 6 at an upper end is detachably inserted. At a position slightly below the upper end, there is provided an overflow port 7 which also serves as a vent for secondary air and an outlet for excess boiled-up juice.

In the embodiment shown in FIG. 1, the flange 6 of the cylindrical container 5 is fitted to an engagement projection 11 formed on the inner peripheral surface of the burner main body 1.
And the inner peripheral edge of the flange portion 6 is
And an overflow port 7 is formed in the peripheral wall of the cylindrical container 5. Therefore, the juice flowing down the inner peripheral wall of the cylindrical container 5 is dripped downward from the inner edge of the flange portion 6, so that the boiling water does not always flow out of the overflow port 7. The overflow port 7 may be provided at the upper end of a convex portion 12 formed at the center of the bottom surface of the cylindrical container 5 as shown in FIG. 2, so that the inner edge of the flange portion 6 is directed inward. Even without the protrusion, the juice flowing down the peripheral wall of the cylindrical container 5 can be prevented from flowing out from the overflow port 7. In FIG. 1, a handle 8 is provided at the upper end of the cylindrical container 5 so that the heavy cylindrical container 5 can be easily attached and detached. In addition, if the hand 8 is provided, the container 5 can be easily removed even if the boiling juice is sticking or burning around the periphery of the flange portion 6,
A configuration such as the overflow port 7 and the gap 9 is not necessarily required.

In the configuration shown in FIG. 1, the air which is going to rise in the space 4 by the draft effect through the gap 9 between the peripheral wall of the cylindrical container 5 and the inner peripheral surface of the burner main body 1 moves upward at the time of a strong fire. The rise is prevented by the pressure of the flame which is simultaneously squirting and overflowing downward, thereby suppressing the generation of NOx due to excess oxygen. However, when the combustion amount is turned down, the pressure due to the flame decreases. In addition, the air that has passed through the gap 9 is sucked into the draft airflow and rises through the overflow port 7 to supply secondary air to the flame, thereby preventing incomplete combustion that is likely to occur at the time of a small fire. It is.

[0009]

According to the present invention, as described above, the cylindrical container 5 is inserted into the lower part of the blow-through space 4 at the center of the burner main body 1, so that the boiling juice enters the main body 1 from the flame hole 3. There is no danger that the inside of the gas range or the inside of the gas range will be soiled, and since it can be easily attached and detached with the support hand 6 provided at the upper end of the container 5, cleaning is extremely easy. The flange portion 6 at the upper end of the container has functions of draining and spacers, and a ventilation gap 9 is formed between the container 5 and the inner peripheral surface 2 of the main body 1. Occasionally, the pressure of the flame which is squirting upward and overflowing downward is prevented from rising, so that NOx reduction can be achieved, and at the time of small fire, the secondary air is sucked upward by the draft effect to remove secondary air. Supply By preventing easy incomplete combustion occurs during small fire, there is an effect that can improve the turndown ratio.

[Brief description of the drawings]

1A and 1B show an embodiment of the present invention, wherein FIG. 1A is a partially cutaway perspective view, and FIG. 1B is a longitudinal sectional view.

FIG. 2 is a longitudinal sectional view of another embodiment of the present invention.

FIG. 3 is a partially cutaway perspective view of a conventional example.

FIGS. 4 (a) and (b) are longitudinal sectional views of a main part of another conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Burner main body 2 Inner peripheral surface 3 Flame hole 4 Blow-through space 5 Cylindrical container 6 Flange part 7 Overflow port 8 Carrier 9 Gap 10 Mixing pipe 11 Engagement convex part 12 Convex part 15 Air shielding plate 16 Shaft

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Toshimichi Ohara 4-1-2, Hirano-cho, Chuo-ku, Osaka City Inside Osaka Gas Co., Ltd. (72) Inventor Masafumi Matsubara 19-18, Sakuradacho, Atsuta-ku, Nagoya City Toho Gas (72) Inventor Masao Takagi 19-18 Sakuradacho, Atsuta-ku, Nagoya-shi Toho Gas Co., Ltd. (72) Inventor Nobuo Otake 1-5-20 Kaigan, Minato-ku, Tokyo

Claims (5)

[Claims] 1. An inward flame burner having a flame hole in an upper portion of an inner peripheral surface of a horizontal ring-shaped burner main body to supply a fuel gas containing primary air of 70 to 100% of an ideal mixing ratio. A juice receiving cylindrical container having a flange at the upper end is removably inserted below the flame hole in the center of the blow-through space at the center of the burner body, and a vent is provided slightly below the upper end of the cylindrical container. An inward flame burner with an overflow port that also serves as 2. The inward flame according to claim 1, wherein said flange portion is engaged with an engaging projection formed on an inner peripheral surface of said burner body, and said overflow port is provided on a peripheral wall of said cylindrical container. Burner. 3. The inward flame burner according to claim 2, wherein the inner peripheral edge of the flange portion is made to project inward from the inner peripheral surface of the cylindrical container. 4. An inward flame burner according to claim 1, wherein said overflow port is provided at an upper end of a convex portion formed at the center of the bottom surface of said cylindrical container. 5. An inward flame burner having a flame hole in an upper portion of an inner peripheral surface of a horizontal ring-shaped burner main body to supply a fuel gas containing primary air of 70 to 100% of an ideal mixing ratio. A juice receiving tubular container having a flange at the upper end is detachably inserted below the flame hole in the center of the blow-through space in the center of the burner main body, and a hand is provided at the upper end of the cylindrical container. Inward flame burner.