JP2000346312A - Burner for gas cooking appliance - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve flame stability of a weak flame of a burner. SOLUTION: A deep burner port groove 6 and a shallow burner port groove 7 are formed on a ring-like burner port groove forming portion 5 of a burner head 1, and several flame stabilizing burner port grooves 10 are formed. The grooves 10 are wider in a groove width W than the groove 6, a length L of the groove is short, and the grooves 10 communicate with a distribution passage 4 by two inflows groove 12 partitioned by a partition wall 11. When the head 1 is placed on a burner body and burner ports are formed of the grooves and the body, high flame stability is brought about by a wide width W and a short length L of the burner port groove, and a resistance force against a back fire in a direction of an arrow (f) is generated by the wall 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stove burner in which a burner head having a flame opening groove is mounted on a burner body to form a flame opening.

[0002]

2. Description of the Related Art A conventional gas burner for a gas stove has a heating power of 0.465 KW (400 kcal /
h), and if the heating power is reduced, the fire may be extinguished or a flashback phenomenon in which the fire returns to the gas distribution chamber side may occur. FIG. 5 shows an example of a conventional burner head intended to improve the flame holding property at the time of low heat and prevent flashback (Japanese Patent Publication No. 4-61246), wherein a is a burner head, and b is a gas distribution path. , C are flame opening groove forming portions, in which an inner peripheral projection d is provided on the inner peripheral side, an outer peripheral projection e is provided on the outer peripheral side with a phase shifted from the inner peripheral projection d, and an inner peripheral projection d is provided between the inner peripheral projections d. forming a side passage d _1, the outer peripheral protrusions e, the burner port groove e ₁ formed between e, and a shallow auxiliary flame hole grooves e ₂ formed on an end surface of the outer peripheral protrusions e. This burner head a has a large passage resistance because the inner peripheral passage d ₁ and the flame opening groove e ₁ are non-linear, thereby suppressing the outflow speed when the gas supply amount is excessive, Further, it is stated that when the gas supply amount is narrowed down, the flame can be prevented from returning in the direction of arrow f, and the minimum gas supply amount can be reduced. In addition, g is an inner flame opening.

However, in this burner head a,
Since two rows of inner projections d and outer projections e are provided in the groove forming portion c over the entire circumference, the structure is complicated, and it is difficult to apply to a small-diameter burner head in terms of dimensions. Further, since all have the deceleration effect of the flame opening groove e _1, it can not be the amount of change in intensity of the flame on a large.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a burner which can improve the flame holding property of a burner when the thermal power is reduced and prevent a flashback phenomenon by a simple means. And

[0005]

According to a first aspect of the present invention, there is provided a burner head in which a gas distribution passage and a flame opening groove forming portion are provided in a ring shape in an inner and outer double. In the gas stove burner in which a large number of flame slots are radially provided in the mouth groove forming portion, and the flame slot groove forming portion is placed on the ring-shaped receiving surface of the burner main body to form a flame hole by both portions, Flame holding groove having a depth substantially the same as that of the flame groove and having a groove width larger than that of the flame groove and having a shorter length is provided at several positions of a flame groove groove forming portion of a burner head. On the inner periphery, several narrow inflow grooves branched by an intermediate partition wall are provided continuously.

In this burner, when the gas is squeezed to reduce the heat, even if the flames other than the flame stabilizing port try to be unstable, the flame of the flame stabilizing port is stable. Burning from the mouth to another flame outlet stabilizes combustion. In addition, even if a backfire phenomenon occurs in the flame holding flame outlet when the flame is low, the partition wall in the flame holding flame opening becomes a resistance to the backfire and suppresses the backfire.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 4, 1 is a burner head, 2 is a burner main body, and a burner B is constituted by both. As shown in FIGS. 1 to 3, the burner head 1 is provided with a ring-shaped gas distribution path 4 and a flame port groove forming portion 5 around the center fitting tube 3 in a double inner and outer direction. Flame mouth groove forming part 5
Has a downward ring-shaped portion, in which a deep flame opening groove 6 and a shallow auxiliary flame opening groove 7 are provided in the radial direction similarly to the conventional burner head, and an ignition portion 8 is provided in a part thereof. . The flame groove forming portion 5 is provided with six flame holding flame grooves 10 at substantially equal intervals except for the ignition portion 8.

The groove width of the flame holding flame opening groove 10 is shown as W and the length is shown as L, and the groove width W is 2-3 times the width of the flame opening groove 6;
The length L is substantially half the length of the flame groove 6. Two inflow grooves 1 are provided on the inner peripheral side of the flame holding flame opening groove 10 with a partition 11 interposed therebetween.
2, 12 are formed. Reference numeral 13 in the drawing denotes a protection cylinder for a temperature sensor (not shown) inserted from below into the center hole of the burner B.

As shown in FIG. 4, when the burner head 1 is mounted on a conventional burner main body 2 to constitute a burner B, the gas distribution path 4 cooperates with the guide path 14 of the burner main body 2. To form a distribution chamber 4A, and the flame port groove 6, the auxiliary flame port groove 7, the flame holding flame port groove 10 and the inflow groove 12 cooperate with the receiving surface 15 of the burner body 2 to form the flame port 6A, the auxiliary flame port 7A,
A flame holding flame outlet 10A and an inlet 12A are formed.

In the flame holding flame outlet 10A of the burner B, since the groove width W is large, the length of the edge around the flame outlet becomes long, thereby improving the flame holding property. The length L
Is short and the passage resistance in the flame holding flame opening 10A is small, so that the change in the flame when the gas valve is operated is alleviated, and the fire is not extinguished even if a sudden low heat operation is performed. Further, the low heat performance is improved, and the heat retention of the cooked product is improved. The heat retention test to confirm the heat retention is 1000ml in a 20cm diameter aluminum pan.
Of water, boil over medium heat, hold for 5 minutes over low heat, continue the low heat using the weight at this time as the initial weight, and examine the evaporation after 1 hour. Test gas 13A-1,
At a gas pressure of 2.0 KPa, the minimum heating power is 0.29 KW
(250 kcal / h) with a burner.

In the conventional burner, a minimum of 0.46
Evaporation 180g with 5KW (400kcal / h) throttle
On the other hand, in the burner B shown in the figure, the heating power could be reduced to 0.29 KW (250 kcal / h), and the amount of evaporation was 70 g with the heating power. In this test, the evaporation was reduced by 61% and the thermal power was reduced by 37.5%. Thus, the fact that the amount of decrease in the amount of evaporation is larger than the amount of decrease in the thermal power means that the evaporation of water on a low heat is small and is suitable for cooking or keeping warm.

The above-mentioned 0.29 KW (250 kcal)
/ H) In the front and rear throttles, the flashback phenomenon as shown by the arrow f did not occur at all. It is understood that this is caused by the resistance against the backflow caused by the partition wall 11.

Although the above-described burner has the auxiliary flame port 7A, a similar effect is produced even in a burner without the auxiliary flame port.

[0014]

As is apparent from the above description, the flame holding flame outlet has substantially the same depth and a large groove width as the other flame outlets.
By providing the flame holding flame outlet having a short length, the length of the edge around the flame outlet of the flame holding flame outlet becomes longer, and the flame holding property is improved. The resistance is reduced, whereby the change of the flame is reduced, so that even if a rapid thermal power operation is performed, the fire is not extinguished, and there is an effect that the flashback phenomenon is prevented by the resistance of the partition wall on the inflow side. Further, since the flame holding flame outlet is provided at several places of the burner, there is an advantage that the flame holding action is surely performed.

[Brief description of the drawings]

FIG. 1A is a bottom view of a burner head, and FIG. 1B is a development view as viewed in a direction indicated by an arrow A ₁ .

FIG. 2 is a cross-sectional view taken along line AA of FIG.

FIG. 3 is a perspective view of a main part of the burner head.

FIG. 4 is a sectional view of a burner according to the present invention.

FIG. 5 is a bottom view of a conventional burner head.

[Explanation of symbols]

 B Burner 1 Burner head 2 Burner main body 4A Distribution chamber 5 Flame groove forming part 6 Flame groove 6A Flame 7 Auxiliary flame groove 7A Auxiliary flame 10 Flame groove 10A Flame flame 11 Partition wall 12 Inflow groove 12A Inlet 15 Receiving surface

Claims (1)

[Claims] A burner head is provided with a gas distribution path and a flame groove forming portion in a ring shape inside and outside, and a large number of flame grooves are radially provided in the flame groove forming portion. In the gas stove burner mounted on the ring-shaped receiving surface of the burner body and having a flame port formed by both parts, the depth is substantially the same as the flame port groove, and the groove width is larger than the flame port groove. Are provided in several places of the flame groove formation part of the burner head, and several narrow inflow grooves branched by an intermediate partition are continuously provided on the inner periphery of the flame flame groove. A gas burner for gas stoves.