JP3499645B2 - Swirling flow 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 swirl flow burner used as a top burner for a domestic or commercial gas range.

[0002]

2. Description of the Related Art Generally, a ring-shaped burner used in a gas range rapidly deteriorates in thermal efficiency as the diameter of the bottom surface of the container to be heated becomes smaller. This is because the highest temperature portion of the flame comes out to the outside of the bottom surface of the container, and as a countermeasure against this, a swirl flow burner in which the flame is swirled in a spiral shape is conventionally known. Figure 1 shows an example of the structure.
The horizontal ring-shaped burner head 1 is provided with a large number of slit-shaped flame holes 2 inclined in the tangential direction so as to swirl the premixed gas over the entire inner circumference at the upper end of the burner head 1. In order to reach the outer circumference of the bottom surface of the container, the contact time between the bottom surface and the burner flame is extended, and at the same time, the maximum temperature point of the flame comes into contact with the bottom surface to improve the thermal efficiency.

[0003]

In the conventional structure shown in FIG. 1, the flame hole 2 normally provided on the outer peripheral edge of the burner head 1.
Since the burner head 1 is provided along the inner peripheral edge of the burner head 1, there is a problem that the size of the burner head 1 becomes large, and in general, the flame hole 2 has a top plate 3 (burner top) which is attached to the burner head body 3. ), The burner head 1 is made of cast metal because strength is required, and therefore the partition wall 7'between the flame holes 2 has a large thickness for reasons of strength and molding. There is a problem that it cannot be made small and mass production is difficult by cutting. The present invention aims to solve these problems.

[0004]

According to the present invention, as shown in FIG. 2, a horizontal ring-shaped burner head 1 is provided with a large number of flame holes 2 inclined in a tangential direction over the entire inner circumference thereof. In the swirling flow burner, the burner head 1 has a ring-shaped main body 3 having an open upper surface, a ring-shaped top plate 4 detachably attached to the main body 3, an upper edge of the inner wall 3a of the main body 3 and the top plate 4. It is composed of a cylindrical flame hole block 5 sandwiched between the inner peripheral edge of the frame and the flame hole block 5, and the flame hole block 5 has two upper and lower ring-shaped frames 6a and 6b, and upper and lower ends of both frames 6a and 6b. It is characterized in that the blade plate 7 is composed of a plurality of fixedly attached stainless steel sheet metals.

[0005]

In order to prevent backfire, it is necessary to make the width of the slits forming the flame holes 2 sufficiently narrow, but it is not necessary to make the partition wall between the slits 2 thick. From the above request, it had a certain thickness. Therefore, in the present invention, the top plate 4 and the flame hole block 5 which require strength are formed as separate bodies, and the flame hole block 5 is provided with two upper and lower ring-shaped frames 6a and 6b and both frames 6a and 6b.
By configuring the upper and lower ends with the vane plate 7 made of a plurality of stainless steel plates fixed to each other, the thickness of the partition wall, that is, the vane plate 7 can be reduced, and a predetermined fuel supply amount can be secured with the smallest possible inner diameter. And burner head 1
Was able to be miniaturized.

[0006]

FIG. 2 shows an embodiment of the present invention, in which a horizontal hollow ring-shaped burner head 1 has a ring-shaped main body 3 with an open top, a ring-shaped top plate 4, and a main body. 3 and a top plate 4 and a cylindrical flame hole block 5 sandwiched between them. The flame hole block 5 is provided on the upper and lower ring-shaped frames 6a and 6b made of casting or sheet metal at equal angular intervals. The upper and lower ends of the vane plate 7 made of stainless steel plate are fitted and fixed in the insertion groove 9, and each vane plate 7 is attached so as to be inclined in the tangential direction with respect to the normal line.
The slit-shaped flame holes 2 for injecting the premixed gas are formed between the adjacent vane plates 7. Further, the lower surface of the top plate 4 is an inclined surface 4a that rises from the outer circumference toward the inner circumference, which gives an upward velocity component to the fuel gas ejected inward from the slit 2 and causes it to move downward in the flame. Can be prevented, and the mounting bolt 11 can be omitted due to the concave step portion formed outside the inclined surface 4a.

[0007]

As described above, according to the present invention, the top plate 4 and the flame hole block 5 are provided separately, and the flame hole block 5 is composed of the upper and lower ring-shaped frames 6a and 6b and the vane plate 7 made of sheet metal. Since it is configured, the thickness of the partition wall 7 between the flame hole slits 2 becomes thin, and thereby a predetermined fuel supply amount can be secured with a small inner diameter, so that the burner head 1 of the swirl flow burner, which has conventionally been unavoidable to be large in size. Has the advantage that it can be miniaturized, and since the casting top plate 3 does not need to form a partition wall for forming the flame hole slit 2 in the lower part, it is easy to manufacture and the structure is There is an advantage that the burner head 1 is robust, and since the diameter of the central cavity 8 of the burner head 1 is reduced, there is an advantage that high thermal efficiency can be exhibited even when the bottom diameter of the heated container is small.

[Brief description of drawings]

FIG. 1A is a vertical cross-sectional view of a conventional example, and FIG. 1B is a perspective view of relevant parts.

FIG. 2 is a vertical sectional view of an embodiment of the present invention.

FIG. 3 is a plan view showing a cross-section with a part thereof cut away.

FIG. 4 is a perspective view of an essential part of the above.

[Explanation of symbols]

1 burner head 2 flame holes 3 body 4 Top plate 4a inclined surface 5 flame hole block 6a upper frame 6b lower frame 7 Blades or partition walls 8 central cavity 9 Insert groove

─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Masafumi Matsubara 507-2 Shintakucho, Tokai City Toho Gas Stock Company In-house (72) Inventor Keiichiro Sugimoto 1-4-4 Sakuragawa, Naniwa-ku, Osaka City Sammy Co., Ltd. (56 ) References JP-A-4-190002 (JP, A) Jitsuko Sho 62-5527 (JP, Y1) (58) Fields investigated (Int.Cl. ⁷ , DB name) F23C 5/32 F23D 14/06

Claims (2)

(57) [Claims] 1. An upper end portion of a horizontal ring-shaped burner head,
In a swirling flow burner having a large number of flame holes inclined in the tangential direction over the entire inner circumference, a ring-shaped main body having the burner head whose upper surface is opened and a ring-shaped main body detachably attached to the main body A top plate and a cylindrical flame hole block sandwiched between the upper edge of the inner wall of the main body and the inner peripheral edge of the top plate, and the flame hole block includes two upper and lower ring-shaped frames. The upper and lower ends are fixed to both frames, and the tangent line of the inner circumference of the flame hole block
A swirl flow burner composed of a plurality of vanes made of sheet metal mounted so as to be inclined in the direction . 2. The tangential direction of the inner circumference of the flame hole block
The many blades that can be attached are made of stainless steel.
The swirl flow burner according to claim 1, wherein