JPH04353308A - Stove burner - Google Patents

Abstract

PURPOSE:To enhance the thermal efficiency and stabilize the combustion state of flames when an object is heated by a stove burner. CONSTITUTION:A burner head 2 has a ring-shape and a number of diagonal spout paths 4 are symmetrically arranged inside the burner head 2 so that fuel-air mix in the burner head 2 spouts slightly upward along the tangential lines E of a concentric circle D having a smaller diameter than the burner head 2. Therefore, spiral streams 7 of flames 6 rise as they spiral around the vertical line F at the center of the burner head 2.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stove burner applied to household gas stoves.

0002

2. Description of the Related Art In a stove burner used for a household gas stove, a burner head 50 is used as shown in FIGS. 6 and 7.
When the mixed gas is spouted upward and slightly outward from each flame hole 51 to 51, each flame 52 stands almost vertically above the burner head 50, and the pot 54 above 53 is heated by the flame 52. The flame stream 55 is formed to flow along the radial direction of the pot 54 while contacting a portion of the lower surface and side surface of the pot 54.

0003

[Problems to be Solved by the Invention] In the stove burner, the secondary air that promotes combustion joins the flame 52 only by natural convection due to combustion heat, so the thermal efficiency becomes low and the flame becomes unstable during high-load combustion. There were other problems, such as the possibility of incomplete combustion, and the inability to increase the turndown ratio (the ratio of the thermal power at minimum combustion to the thermal power at maximum combustion) beyond a certain limit. An object of the present invention is to improve the above-mentioned problems, increase the thermal efficiency when heating an object to be heated with a stove burner, and stabilize the combustion state of the flame.

0004

[Means for Solving the Problems] The stove burner of the present invention has a ring-shaped burner head in which the mixed gas ejected from inside the burner head is concentric with the burner head and extends from the inner diameter of the burner head. It has a configuration in which a plurality of ejection passages are arranged rotationally symmetrically in the circumferential direction, each inclined so as to be oriented obliquely upward along the tangent line of concentric circles having a reduced diameter.

[0005]

[Operation] The mixed gas is ejected obliquely upward from the multiple ejection passages formed in the burner head along the tangent to a concentric circle that is concentric with the burner head and has a diameter smaller than the inner diameter of the burner head. Each flame is intercepted by the jet of flame on the side of the flow direction and turns inward while swirling diagonally upward, and the swirling flow of each flame ascending while swirling passes through the center of the burner head. formed around a perpendicular line.

[0006]

Effects of the Invention Since the present invention is configured as described above, when each flame swirls, the secondary air around the swirling flow of each flame is effectively sucked into the swirling flow, and the flames Since the merging occurs and the combustion of the flame is promoted, the combustion state of the flame can be stabilized and incomplete combustion of the mixed gas can be suppressed. Therefore, high-load combustion is possible, and a stable combustion state can be maintained even in a dilute mixture gas with a low gas concentration, and NOx in the exhaust gas can be reduced.
The turndown ratio can be increased compared to conventional stove burners. In addition, when heating an object to be heated with a stove burner, the swirling flow of each flame flows in diagonal contact with the object to be heated, increasing the contact area where each flame contacts the object to be heated. It can increase thermal efficiency when heating the body.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention applied to a stove burner for a household gas stove will be described with reference to FIGS. 1 to 5. The stove burner B includes a mixing pipe 1 having a gas inlet 1a into which gas fuel is introduced and an air inlet 1b into which primary air is introduced. The burner head 2 is provided with a burner head 2 into which a mixed gas mixed with air is introduced.

In this example, the burner head 2 is formed into a ring shape by press working and joining two thin metal plates, and a mixed gas flow connected to the mixing tube 1 is provided at the outer periphery of the inside of the burner head 2. The channel 3 is formed in an annular shape.

Near the inner circumference of the burner head 2, the mixed gas ejected from the burner head 2 forms a tangent E to a concentric circle D that is concentric with the burner head 2 and has a diameter smaller than the inner diameter of the burner head 2. A large number of ejection passages 4 to 4 are formed so as to be oriented obliquely upward along the circumferential direction and arranged rotationally symmetrically in the circumferential direction.

[0010] The outer end of each ejection passage 4 is communicated with the mixed gas flow passage 3, and the inner end of each ejection passage 4 is arranged on the inner circumferential surface 2a of the burner head 2 at equal intervals in the circumferential direction. The flame holes 5 to 5 are each opened so that the mixed gas is accelerated and spouted out.

2 ejected from each flame hole 5 of the burner head 2
Next, when the air ignites the combined gas mixture and burns the gas mixture, each flame 6 is intercepted by the jet of flame on the side of the flow direction and turns inward in a spiral shape diagonally upward. A swirling flow 7 of each flame 6 flows and rises while swirling around a perpendicular line F passing through the center of the burner head 2.
~7 are formed.

Next, the operation and effects of the embodiment having the above configuration will be explained. In this example, the burner head 2 is formed into a ring shape, and the mixed gas ejected from the inside of the burner head 2 is located at a tangent to a concentric circle D that is concentric with the burner head and has a diameter smaller than the inner diameter of the burner head. A large number of ejection passages 4 are formed so as to be oriented obliquely upward along E, respectively, and arranged rotationally symmetrically in the circumferential direction.

[0013]

[Example] For this reason, when each flame 6 swirls, the secondary air around the swirling flow 7 of each flame 6 is effectively sucked into the swirling flow 7 and merges with the flame 6. Since combustion is promoted, the combustion state of the flame 6 can be stabilized and incomplete combustion of the mixed gas can be suppressed. Therefore, high-load combustion is possible, and even with a dilute mixture gas with a low gas concentration, a stable combustion state can be maintained and NOx in the exhaust gas can be reduced.
In addition, the turndown ratio can be increased compared to conventional stove burners.

Further, as shown in FIG. 5, when the pot 8 placed on the pot 9 is heated by the flame 6 of the stove burner B, each flame 6 is tilted diagonally to the bottom and side surfaces of the pot 8. Since the flames 6 contact and flow, and the contact area between each flame 6 and the pot 8 increases, the thermal efficiency when heating the pot 8 by the flame 6 can be increased.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a burner head showing one embodiment of the present invention.

FIG. 2 is a sectional view taken along line XX in FIG. 1;

FIG. 3 is a perspective view of the stove burner.

FIG. 4 is a perspective view illustrating a flow state of a swirling flow.

FIG. 5 is a side view showing a state when a pot is heated with a stove burner.

FIG. 6 is a perspective view of a conventional stove burner.

FIG. 7 is a side view showing a state when a pot is heated with a conventional stove burner.

[Explanation of symbols]

2 Burner head 4. Ejection path 5 Flame hole 6 Flame 7 Swirling flow B Stove burner D Concentric circles E Tangent line

Claims (1)

[Claims] 1. A burner head formed in a ring shape is provided with a gas mixture ejected from the burner head at a tangent line of a concentric circle that is concentric with the burner head and has a diameter smaller than the inner diameter of the burner head. A cooking stove burner characterized by forming a plurality of ejection passages which are arranged rotationally symmetrically in a circumferential direction and are each inclined so as to be oriented diagonally upward along the circumferential direction.