JPS61147007A - Burner of cooking stove - Google Patents

Abstract

PURPOSE:To restrain from increasing temperature around a flame retaining unit and prolong a service life of materials by a method wherein at a lower part of the flame retaining unit an empty space is provided, underneath the empty space a projection unit is provided, on which an around conical shaped burner cover is installed. CONSTITUTION:At an extension part of a circumferential surface above burner body 2, the flame retaining unit 3' in a form of downward tapered shape, is provided, thereby, blowing up of the secondary air 9 against a flame 8 is prevented, similarly, refrains the flame 8 from lifting up, which causes to form a stabilized flame. Further, by constituting the flame retaining unit 3 in a form of downward taper shape, the flowing out of boiled over stocks into a flame hole 7 is prevented, which is receivable on the burner cover 12. And in the empty space 9' underneath the flame retaining unit 3', an air flow stream due to a draft effect by a combustion is induced, thereby, the flame retaining unit 3' is cooled down to prevent generating back fire caused by temperature increase thereof. At the same time, it is possible to reduce discolouration of materials for the burner body 2 and the burner cover 12, as well as to reduce an incrustation with boiled over stocks to the same, therefore a long service life of the materials are obtainable.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a stove burner for home or commercial use.

Conventional technology The conventional technology will be explained according to FIGS. 2 and 3.

In Fig. 2, 1 is the burner body, and the burner body 2
It is formed by fitting the upper surface 3 of the burner cap 4 with the burner cap 4. 6 is a passage formed in the burner body 2 and the burner cap 4, through which air-fuel mixture 6' is passed through a mixing pipe (not shown)'.
will be sent. Further, the space formed by the numerous openings of the burner cap 4 and the upper surface 3 of the burner body 2 is used as a flame hole passage 6, and the downstream side of the air-fuel mixture 6' is used as the flame hole passage outlet to form a flame hole 7. . The outer diameter of the flame hole 7 and the outer diameter of the upper surface of the burner body 2 are approximately the same. Reference numeral 8 indicates a lifted flame formed in the flame hole 7. 9 is supplied to the flame 7 2
Next is air. A secondary air hole 11 is provided approximately at the center of the burner cap 4 and supplies a portion of the combustion air. Reference numeral 12 denotes a substantially conical burner cover attached to the burner body 2, and is used to catch boiled over water from a pot (not shown).

Now, one of the conditions that a burner must meet is flame stability. In this case, the flame hole 7 of the burner cap 4
Since the outer diameters of the upper surface 3 of the burner body 2 and the burner body 2 are almost the same, the outer periphery of the upper surface 3 has little contact with the flame 8. Therefore, the temperature rise on the upper surface 3 and the surrounding area was small, the flow rate was small, and even with gas having a slow combustion rate, there was no backfire and the extinguishing sound was light.

Next, another conventional example will be explained with reference to FIG.

(The same numbers as in FIG. 2 indicate the same names and parts, and detailed explanations will be omitted.) 3' is a flame stabilizing portion formed on the extended periphery of the upper surface 3 of the burner body 2. 8' is a flame formed from the flame hole 7, and the flame stabilizing part 3' prevents the inner flame from being 2
Next, there is no blowing up of the air 9, and a part of the flame 8 comes into contact with the flame holding part 3', partially reducing the jetting speed of the mixture, making it difficult for the flame to lift and increasing the flow rate relatively. A stable flame can be formed for gases with low burning speeds.

Problems to be Solved by the Invention However, in the configuration shown in FIG. 2, the flame 8 tends to be lifted up by the blowing up of the secondary air 9 generated along the outer periphery of the upper surface 3, forming a top-up flame. It becomes,
Alternatively, it may become impossible to form a flame. This tendency is particularly noticeable in gases where the flow rate is large and the combustion rate is low. Therefore, upon ignition, the flame propagation to each flame hole was insufficient, making it difficult to form a uniform flame instantly.

Further, although the configuration shown in Fig. 3 can prevent flame lift-up, part of the flame comes into contact with the flame holding part 3', so the temperature around the flame holding part 3 and the flame hole A increases. In the case of a gas having a relatively small flow rate and a high combustion speed, backfire may occur from the flame hole 7 into the burner body 2. Furthermore, as the flame holding section 3' receives heat from the flame 8', the temperature of the burner body 2 also rises, causing the burner cover 12 attached to it to rise.
There was a similar increase in the amount of water used, causing problems such as discoloration of materials and sticking of boiled water.

The present invention solves these conventional problems, and prevents flame lift and backfire while maintaining good combustion performance.
The purpose is to suppress the temperature rise around the flame-holding part and extend the life of the material.

Means for Solving the Problems In order to solve the above problems, the stove burner of the present invention has a burner cap having a large number of openings and a burner body that are attached and detached to form a flame hole around the burner cap. A downwardly tapered flame stabilizing part is provided on the extension of the upper surface periphery, a gap is provided at the bottom of the flame stabilizing part, a protruding part is provided below the gap, and a substantially conical burner cover is provided on the protruding part. It has a similar configuration.

Effects The present invention has the following effects due to the above-described structure.By providing a downwardly tapered flame stabilizing portion on the extension of the upper surface of the burner body, secondary air is prevented from blowing up against the flame, and flame lift is suppressed. A stable flame can be formed. In addition, by creating a gap in the lower part of the flame stabilizing section and cooling the flame stabilizing section, backfire of the flame can be prevented, and at the same time, by reducing the temperature of the burner body and the burner cover, it is possible to extend the life of these.

Example Hereinafter, one embodiment of the present invention will be described based on the drawings.

Note that the same numbers as the conventional example are the same names and parts.
Detailed explanation will be omitted. In FIG. 1, 2' is an annular protrusion provided approximately in the middle of the outer circumferential surface of the burner body 2, and 9' is a flame stabilizing part 3' that is tapered downward on the extension of the upper surface of the burner body 2, and the above-mentioned protrusion. This is a gap surrounded by part 2'. Further, a substantially conical burner cover 12 is provided at the tip of the protrusion 2'.

In the above configuration, by providing a downwardly tapered flame stabilizing portion 3' on the extension of the upper surface of the burner body 2, the secondary air 9 is prevented from blowing up against the flame 8 (especially the inner flame), and lift-up of the flame 8 is prevented. It is possible to suppress and form a stable flame.

This is particularly effective for gases that have a large flow rate and a low combustion rate. Note that by forming a downward taper in the flame holding portion 3, boiled boiled water can be prevented from entering the flame hole 7 and can be received on the burner cover 12.

In addition, by introducing air flow into the gap 9' at the lower part of the flame stabilizing part 3' due to the draft effect caused by combustion, the flame stabilizing part 3' is cooled, preventing backfire due to a temperature rise in the flame stabilizing part 3', and at the same time, the burner body 2. By reducing the temperature of the burner cover 12, discoloration of the material or sticking of boiled water is reduced, and the life of the material can be extended.

Effects of the Invention As described above, the stove burner of the present invention provides the following effects.

(1) Lift can be prevented even in gases with a relatively large flow rate and low combustion speed, so when ignited, the flame transfers easily to each flame hole, forming a uniform flame and creating a flame-holding area. The flow rate is relatively low by cooling the
A stable flame can be formed without flashback even with gases that burn at a high combustion rate.

(2) By providing a gap in the lower part of the flame holding part and introducing an air flow, it is possible to reduce the temperature of the burner pod and burner cover, thereby extending the life of the material.

[Brief explanation of drawings]

FIG. 1 is a schematic cross-sectional view showing one embodiment of the stove burner of the present invention, FIG. 2 is a schematic cross-sectional view of a conventional stove burner, and FIG. 3 is a schematic cross-sectional view of another conventional stove burner. 2...Burner body, 2'...Protruding part, 3...Flame holding part, 4...Burner cap, 7...Flame hole , 9'... void, 12
...Burna cover. Name of agent: Patent attorney Toshio Nakao and 1 other person2,
・・・・Protrusion part 3′・・Foil part 4・・・・ノ(°−Naki W”/) 0 7・・Flame KO L 9″・...Sky 碌I2...ノ(゛-Decover Figure 2 Figure 3

Claims (1)

[Claims] A burner cap having a large number of openings and a burner body are removably fitted together to form a flame hole around the burner cap, and a downwardly tapered flame holding part is provided on an extension of the upper surface of the burner body. A stove burner in which a lower part of the part is a gap, a protrusion is provided below the gap, and a substantially conical burner cover is provided on the protrusion.