JPS6138965B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to burners, particularly gas burners.

Conventional gas stove burners with internal flames have a secondary air hole in the center, so when boiling liquid spills from the secondary air hole, it stains the inside of the appliance and the equipment stand, etc. The disadvantage was that it took time to clean up the broth etc. after use. In order to overcome this drawback, secondary air supply means have been considered, and this drawback has been eliminated. However, a sufficient amount of secondary air required for combustion could not be obtained, resulting in fuel failure. Alternatively, the range of conditions for obtaining the amount of secondary air was narrow, making the equipment difficult to use. The present invention improves these drawbacks.

FIG. 1 shows a typical usage diagram of a gas stove, and FIG. 2 shows a sectional view of a conventional burner having a secondary air hole in the center. Figure 3 shows a stove configuration and burner that solves the drawback of boiling liquid spilling from the secondary air hole in the burner of Figure 2;
The figure shows an embodiment of the invention. This will be explained below according to the diagram.

FIG. 1 shows how the gas table 1 is used. A pot 5 is held in a predetermined position by a trivet 3, and when the ignition pot 2 is operated, gas is supplied to a burner 4 and burned. This state is shown in Fig. 2, and the ignition pot 2
The gas supplied by the operation mixes with air in the mixing tube 6, flows into the mixing chamber 7, reaches the main flame hole 8 of the burner 4 set at a predetermined position in the mixing tube 6, and forms a flame 9. and burn it. Further, a part of the air-fuel mixture that has flowed into the mixing chamber 7 reaches the internal flame holes 10 and 11, forms flames 12 and 13, and burns. At this time,
Most of the secondary air necessary for combustion of the flame 9 formed in the main flame hole 8 is supplied from the outside, and some of it is supplied from the secondary air hole 14 provided in the center of the burner. Further, the flame 13 formed in the internal flame holes 10 and 11 receives secondary air from the central secondary air hole 14, and continues to burn stably. When it is used in this state, if the broth spills from the pot 5 placed on the trivet 3, a portion of the broth will flow down the bottom of the pot 5 and pass through the secondary air hole 14 provided in the center of the burner 4. fall down. The fallen broth flows inside the stove 1 and stains the stove stand, etc. FIG. 3 shows a stove configuration and burner that improve this drawback. The stove 20 operates a cooker 21 to supply gas from a nozzle 22 into a mixing tube 23, and the gas and air are mixed in the mixing tube 23, forming a mixing chamber that is separated or integrated with a burner head 24 and a burner cap 25. 26 and ejects from the flame hole 27 and the inner flame hole 29 to form a flame 28 and an inner flame 30 to heat the pot 32 placed on the trivet 31 and achieve the purpose. At this time, secondary air is supplied to the flame 28 from around the trivet 31 as a secondary air flow 35, and a part of the secondary air flow 35 is used for combustion of the inner flame 30 at a certain circumference from the center. The burner is airtightly separated from the mixing chamber 26 and has an independent secondary air hole 33 passing through the burner head 24 and burner cap 25.
A through hole 37 through which the secondary air passes is arranged on a saucer provided inside the position of the secondary air hole 33, one end of the secondary air hole is opened on the lower surface of the burner head 24 outside of the through hole 37, and the other end is An inner flame hole 29 is provided in the upper surface of the burner cap between the outlet portion 38 and the main flame hole 27 and communicating with the mixing chamber 26 at the outlet portion 38 which is open on the upper surface of the burner cap. The air flows into the secondary air hole 33 and is supplied as an internal flame secondary air flow 34 . Conditions for the inner flame secondary air flow 35 to become a flow, that is, in order for secondary air to be supplied to the inner flame, the secondary air flow 35 and the inner flame due to the combustion heat generated by the flame 28 and the inner flame 30 must be A draft must occur between the secondary air flow 34 and the secondary air flow 34 . Since the conditions for draft generation are the temperature difference between the two and the distance between the flame 28 and inner flame 30 and the pot 32, certain conditions are inevitably determined and the amount of secondary air to be supplied is determined. It is. Looking at the flow of the internal flame secondary air flow 34 at this time, it flows through the secondary air hole 33 due to the draft, collides with the bottom of the pot 32 placed on the trivet 31, and causes the internal flame. The internal flame secondary air flow 34 that has flowed in for the purpose of
2, and the amount supplied to the inner flame 30 is reduced, resulting in the inner flame 30 not being combusted due to lack of air, or resulting in incomplete combustion. As a result, in inverse proportion to the amount, the secondary air hole 33 is enlarged to reduce the passage resistance,
It is necessary to increase the draft by increasing the distance between the flame 28 and inner flame 30 and the pot 32, and the stove 20
Similar problems have arisen due to the increase in the height of the burner cap 25 and the burner head 24.

The present invention aims to improve the problem that the secondary air supplied in this way is not supplied to the necessary parts, and to improve the above-mentioned drawbacks. An embodiment of the present invention will be described with reference to FIG.

The burner head 50 and the burner cap 51 forming the burner 49 are separated or integrated into the mixing chamber 5.
2 is formed, and the air-fuel mixture is ejected from the flame hole 53 and the inner flame hole 55 to form a flame 54 and an inner flame 56 for combustion. The structure and function of these components are exactly the same as those of the prior art, and the only difference is the means for supplying the inner flame secondary air flow 59 flowing in from the secondary air hole 57 to the inner flame 56. Conventionally, as shown in the example of Fig. 3, the secondary air supplied to the inner flame was airtightly separated from the mixing chamber 52 on a certain circumference from the center of the burner, and passed through the burner head and burner cap into an independent air chamber. The present invention replaces the means provided primarily by the diffusion of the secondary air flow 59 flowing through the secondary air holes 57.
A convex portion 6 in which the side of the secondary air hole wall 61 of the outlet portion 58 of
0, or by tilting the secondary air hole 57 toward the inner flame 56 side to direct the flow of the inner flame secondary air flow 59 to the convex portion 60.
Alternatively, the inclination is used to forcibly guide and supply it to the inner flame 56 side.

The present invention described above has the following effects.

(1) Since the burner cap has a convex part, the burner cap can be used like a lid separate from the burner cap that is placed on top of the burner cap with legs to guide secondary air toward the inner flame hole. When attaching and detaching the burner cap, the position of the convex part will not shift even if the burner cap is attached or detached for cleaning, etc., compared to the case where there is a risk of the burner cap becoming unstable if the lid is attached and detached in the same way. Always use the burner under the specified conditions to ensure stable combustion.

(2) Since the secondary air is only diverted once toward the inner flame hole by the convex portion, a cap-shaped lid body is placed over the inner hole for the secondary air of the burner cap to direct the flow toward the inner flame hole. Compared to a system that supplies air by meandering the secondary air flow in a zigzag pattern, the flow path resistance is lower and a stable supply of secondary air can be achieved.

(3) Since secondary air is supplied to the inner flame of the inner flame hole by forced supply by draft, combustion is more stable even with the same amount of air as before, and incomplete combustion and lift of the inner flame due to lack of air are avoided. The height to the pot can be kept low and the size can be made smaller.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing a conventional stove in use, Fig. 2 is a sectional view of a conventional burner, Fig. 3 is a partial sectional view of a conventional stove, and Fig. 4 shows an embodiment of the present invention. FIG. 3 is a partial cross-sectional view of the burner. 36... saucer, 37... through hole, 38... outlet section, 49... burner, 50... burner head, 5
1...burner cap, 52...mixing chamber, 53...
...Main flame hole, 55...Inner flame hole, 57...Secondary air hole, 60...Protrusion, 61...Secondary air hole wall.

Claims (1)

[Claims] 1. A burner in which a burner cap and a burner head are separated or integrally configured, hermetically separated from the mixing chamber on a certain circumference from the center, and an independent secondary air hole is provided passing through the burner cap and burner head. A through hole through which a mixing pipe passes is arranged above a saucer provided inside the position of the secondary air hole, one end of the secondary air hole opens on the lower surface of the burner head outside of the through hole, and the other end of the secondary air hole opens on the lower surface of the burner head outside of the through hole. The end is an outlet opening on the upper surface of the burner cap, and an inner flame hole communicating with the mixing chamber is provided on the upper surface of the burner cap between the outlet portion and the main flame hole, and the inner flame hole of the outlet portion is provided with an inner flame hole that communicates with the mixing chamber. A burner in which a convex portion is provided on an opposing side of the secondary air hole wall to protrude toward the inner flame hole.