JPH09112836A - Burner cap for gas cooking stove - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a low-cost burner cap for a gas cooking stove capable of extremely easily forming a secondary air flow window to be opened at the cap by machining. SOLUTION: The burner cap 10 mounted at the upper part of a burner body for forming a gas passage comprises a body 13 having a circular secondary air hole 11 at the center and many burner ports 12 formed at the peripheral edge, and a shield 14 disposed at the upper part of the hole 11. The shield 14 is connected to the upper end of a supporting post 15 so formed at the body 13 as not to protrude into the hole 11, and a secondary air flow window 16 communicating with the hole 11 is opened between the body 13 and the shield 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a burner cap for a gas stove used at home.

[0002]

2. Description of the Related Art As a conventional burner cap for a gas stove, for example, the one disclosed in Japanese Patent Publication No. 7-54166 is known.
The burner cap 1 is mounted on the burner body 2 and has a circular secondary air hole 3 at the center and a large number of flame holes 4 at the peripheral edge. And a cylindrical shielding portion 6 located at an upper portion of the main body portion 5 and having an outer diameter larger than that of the secondary air hole 3
The shielding portion 6 is continuously provided on the upper end portion of the leg portion 7 which is continuously provided on the main body portion 5 so that the lower end portion thereof projects inward of the secondary air hole 3. Is configured.

In the burner cap 1, the outer diameter of the shielding portion 6 is φA, the diameter of the secondary air holes is φB, and the inner diameter of the leg portion 7 is φC. , If the outer diameter of the leg portion 7 is φD, then φA>
The relationship of φB>φD> φC is established, and the main body 5 and the shield 6 are integrally formed to reduce the manufacturing cost, and the secondary air flow flowing to the combustion flame is layered. It is configured so as not to generate a partial secondary air deficiency due to fluidization, and is also configured to be able to significantly reduce the processing cost as compared with drilling.

However, in the above-mentioned conventional burner cap 1, the protruding portion 8 provided on the upper surface of the main body portion 5 is used.
Since the outer peripheral wall of must be machined over the entire circumference so that the relationship of φA>φB> φD is established,
Such work is very complicated, and since such a cutting process must be performed, the leg portion 7 is inevitable.
Has a problem that sufficient strength cannot be obtained unless it projects into the secondary air hole 3, and as a result, the structure of the die of the burner cap 1 becomes complicated at the time of casting and forging, resulting in high cost. Was there.

The present invention was devised in view of the above circumstances, and an object thereof is to form a secondary air flow window communicating with a secondary air hole by machining very easily and at low cost. It is intended to provide a burner cap for a gas stove that can.

[0006]

In order to achieve the above object, according to the present invention, a burner cap mounted on the upper portion of a burner body forming a gas passage is provided with a circular secondary air hole in the center. And a shield portion located above the secondary air hole, the main body portion having a large number of flame holes formed in the periphery thereof, and the shield portion is provided in the secondary air hole. While being continuously provided to the upper end portion of the support pillar portion formed in the main body portion so as not to project into, a secondary air flow window communicating with the secondary air hole is provided between the main body portion and the shield portion. It is characterized by being opened.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 and FIG. 2 show a burner cap 10 according to this embodiment, which has a circular secondary air hole 11 at the center and a large number of flame holes 12 at the periphery. A main body portion 13 formed with the above, a shield portion 14 located above the secondary air hole 11, the main body portion 13 and the shield portion 1
4, a support pillar portion 15 that connects the main body portion 13 and the shield portion 1.
4 and a secondary air flow window 16 that communicates with the secondary air hole 11. The outer diameter of the shielding portion 14 is larger than the diameter of the secondary air hole 11.

When the secondary air flow window 16 for flowing the secondary air flow from the secondary air hole 11 to the combustion flame is formed in the burner cap 10 thus constructed, first, forging / casting is performed. Secondary air hole 11 of main body 13
The peripheral wall surface having a substantially inverted concave cross-section formed so as to close the inner wall is cut inward by a lathe or the like to open the substantially rectangular secondary air flow window 16. At this time, the shielding portion 1
4 and the supporting pillar 15 are left. This allows
The support pillar portion 15 remains in the secondary air hole 11 without protruding. The number of the support pillars 15 is not particularly limited as long as it is 1 or more, and the burner cap 1
Any number can be selected according to the size of 0.

The burner cap 1 thus constructed
When 0 is compared with the conventional burner cap 1,
Now, let the outer diameter of the shield be φA and the diameter of the secondary air hole be φB.
In the case of the conventional burner cap 1, when the size of the inner diameter obtained by connecting the inner diameters of the supporting pillars (legs) is φC, and the outer diameter of the supporting pillars (legs) is φD. , ΦA
While the relationship of>φB>φD> φC is established, in the case of the burner cap 10 according to the present embodiment, φA = φ
It is configured such that the relationship of D> φB = φC is established.

Therefore, in the burner cap 10 according to this embodiment, the structure of each part is φA = φD> φB = φC.
With this configuration, like the conventional burner cap 1, the main body portion 13, the shielding portion 14 and the support pillar portion 15 can be integrally formed by forging or casting, and the support pillar portion 15 can be formed at the same time. Since it is not formed so as to project into the secondary air hole 11, the structure of the mold can be simplified,
It is possible to significantly reduce the forging processing cost or the casting processing cost.

Of course, since the secondary air flow window 16 can be easily opened by a cutting machine such as a lathe, the machining cost can be greatly reduced as compared with the conventional drilling. In particular, in the conventional drilling process, the holes are circular, and since a portion necessary for the processing must be left between adjacent holes, the flow passage of the secondary air is extremely small and when the same opening is obtained, In the present embodiment, the height of the support column portion 15 can be made significantly smaller than that of the conventional drilling, which is extremely economical.

Further, the burner cap 1 according to the present embodiment example
In No. 0, since the shielding portion 14 is formed integrally with the main body portion 13, the shielding portion 14 is not lost or damaged, and the spilled broth produced when the gas stove is used without the shielding portion 14 It is possible to prevent the gas from entering the gas stove, prevent corrosion inside the gas stove, improve durability, and maintain cleanliness.

Further, in the burner cap 10 according to this embodiment, the secondary air flow flowing in the combustion flame flows as a laminar flow, so that there is no partial secondary air deficiency and complete combustion is achieved. be able to. In particular, in addition to the flame holes 12 provided around the burner cap 10, the periphery and the supporting column 1
This effect is remarkable when the internal flame hole 17 is provided in the intermediate portion between the first and second electrodes.

[0015]

Since the burner cap of the gas stove according to the present invention is constructed as described above, the secondary air flow window formed in the burner cap can be formed by machining very easily and at low cost. It is possible to obtain the excellent effect of being able to.

[Brief description of the drawings]

FIG. 1 is a vertical cross-sectional view of a burner cap of a gas stove according to an embodiment of the present invention.

FIG. 2 is a perspective view of the burner cap.

FIG. 3 is a sectional view of a conventional burner cap.

[Explanation of symbols]

 10 Burner Cap 11 Secondary Air Hole 12 Flame Hole 13 Main Body 14 Shield 15 Support Pillar 16 Secondary Air Flow Window

Claims (1)

[Claims] 1. A main body having a burner cap mounted on an upper portion of a burner body forming a gas passage portion, having a circular secondary air hole in the center, and having a large number of flame holes formed at the periphery thereof. And a shielding portion located above the secondary air hole, the shielding portion being formed on the main body so as not to project into the secondary air hole, and the upper end of the supporting column portion. A burner cap for a gas stove, characterized in that a secondary air flow window communicating with the secondary air hole is provided between the main body portion and the shield portion while being connected to the portion.