JPH0293205A - Gas burner - Google Patents

Abstract

PURPOSE:To form short flames which are of an uniform length and stable and, furthermore, prevent the lifting of flames at the time when the oxygen supply is low by arranging in many flame holes which are provided in parallel on the upper face in the longitudinal direction small flame holes which have their width that is about half of the width of said flame holes in the direction o short side. CONSTITUTION:A plurality of rows of flame holes 8 are formed on the upper face in the longitudinal direction of a burner main body 1 with a burner main body 3 for forming inside flame holes and burner main body 2 for forming outside flame holes and a flame holes partitioning plate 4 which is held between those burner main bodies and partitions the flame holes 8. This group of the flame holes 8 have flame holes 8a arranged at every other position among them. Those flame holes 8a have their width in the direction o short side that is about half of the width of the flame holes 8. Primary air for combustion that is sucked from a suction section 5 and gas are mixed into a mixture gas in a mixing pipe section 6 and the mixture gas which is unified in pressure in a pressure unifying section 7 is jetted out from respective flame holes 8 and 8a to burn. And, at the section of the small flame holes 8a the supply of secondary air for combustion becomes plenty, and flames 12a are shorter than flames 12. Further, since even in the combustion with a small supply of oxygen the long flames 12 and short flames 12a are arranged adjacent to one another, the long flames 12 suppress the lifting of the short flames 12a.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a gas burner used in gas appliances such as water heaters.

2. Description of the Related Art A conventional gas burner of this type will be explained with reference to FIGS. 3 to 6. 1 is the burner body, which consists of a pair of outer plates (also referred to as the burner body for forming the outer flame port) 2.2 and a U-shaped inner plate (
It consists of a burner body (also referred to as a burner body for forming an inner burner port) 3, and a pair of burner port partition plates 4 positioned and sandwiched between the outer plate 2.2 and the inner plate 3. This burner body l has a primary air suction part 5, a mixing pipe part 6, a pressure equalizing part 7, and a large number of slit-shaped flame ports 8, which are arranged along the longitudinal direction of the burner body 1. A large number of them are arranged side by side to form a group with the heating parts 9 interposed alternately, and the groups are lined up in parallel to form a reflux area 10 between them. In order to form the suction part 5, the mixing pipe part 6, and the pressure equalizing part 7, the outer plate 2.2 is press-formed with half-divided concave parts at opposing positions, and furthermore, the flame outlet 8 and the flame outlet hot part 9 are press-formed. In order to form the concave portion 2a and the convex portion 2b, the concave portion 2a and the convex portion 2b are press-formed. Further, the inner plate 3 and the outer plate 2.2 are press-formed with concave portions 3as and convex portions 3b in order to form a flame port 8 on the upper surface.

To assemble this burner body l, one outer plate 2, one burner opening partition plate 4, and inner plate 3 are joined by aligning the concave part 3a and the convex part 3b with the concave part 2a and convex part 2b of the outer plate 2, respectively. Then, the other flame opening partition plate 4 and the other outer plate 2 are joined, and finally the outer circumference and inner circumference of the outer plate 2.2 are welded, and the convex parts 2b, 3b and the flame opening partition plate 4 are spot welded. The flame ports 8 are formed independently. When the burner main body 1 is assembled, although the lower ends of the pair of flame port partition plates 4.4 are slightly bent from the center, a gap 11 is formed in the pressure equalizing portion 7 over the entire length. 12 is a nozzle that spouts gas.

Then, the gas ejected from the nozzle causes primary air for combustion to be sucked in from the suction part 5 by the ejector action, and is mixed in the mixing pipe part 6. Furthermore, the air-fuel mixture is pressure-equalized in the pressure equalization part 7, and is separated from the flame opening partition. It is divided by the plate 4 and flows to the outer and inner flame ports 8,
It ignites and burns.

Problems to be Solved by the Invention However, in the above-mentioned conventional configuration, the burner body 1 can only be accessed from the portion 9 where the adjacent flame ports 8 are not formed between the multiple flame ports 8 arranged. Since secondary air for combustion is not supplied to the inner flame port 8, the burner body l
There was a problem that there was a lack of secondary air in the inner flame port 8, and the length of the flame was long (which resulted in incomplete combustion, causing the generation of CO that was harmful to the human body.) One way to do this is to shorten the length of the flame ports 8 in the longitudinal direction and increase the gap between adjacent flame ports 8 to ensure a sufficient supply of secondary air for combustion. In this method, the adjacent flame ports 8 and 8 are completely separated, and during combustion in low oxygen conditions, the flame lifts, causing the generation of CO that is harmful to the human body. Was.

The present invention solves the above-mentioned problems of the prior art, and is capable of forming a short flame with uniform pressure and stable flame in a gas burner having a slit-shaped flame port, and furthermore, it is possible to form a short flame with a uniform length and a stable flame. The purpose is to prevent lifting of

Means for Solving the Problems The present invention achieves the above objects by providing a plurality of burner ports on the upper surface along the longitudinal direction, a burner body for forming an inner burner port, a burner main body for forming an outer burner port, and both burner bodies. It is formed by a burner port partition plate that is sandwiched between the burner ports and partitions the burner ports, and the multiple burner ports are arranged every other burner port with the width in the short side direction being approximately halved.

Operation The present invention provides a burner which forms a uniform and short flame and further prevents lifting during combustion under low oxygen conditions, with the above-described configuration.

EXAMPLE Hereinafter, a gas burner according to an example of the present invention will be described with reference to the drawings. Note that the same parts as those in the prior art shown in FIGS. 3 to 6 are given the same reference numerals, detailed explanations are omitted, and different parts will be mainly explained.

In Fig. 1 and Fig. 2, the burner main body 3 for forming the inner flame port
The burner body 1 is composed of a burner body 2 for forming an outer flame mouth, and a flame mouth partition plate 4 which is sandwiched between these two burner bodies and partitions a flame mouth 8.
A plurality of rows of burner ports 8 are formed on the upper surface in the longitudinal direction.

In this group of burner ports 8, burner ports 8a whose width in the short side direction is about half that of the other burner ports 8 are arranged every other burner port. Therefore, the burner port 8a is set to approximately half the opening area of the burner port 8.

In the above embodiment, the gas is ejected from the nozzle, mixed with the primary air for combustion sucked from the suction part 5 and gasified in the mixing pipe part 6, and further pressure-equalized in the pressure equalization part 7, so that the air-fuel mixture is mixed into each flame. It is ejected from the port 8.8a and burns. Then, the supply of secondary air for combustion is more abundant in the small flame port 8a than in the large flame port 8, and the flame 12a is shorter than the flame 12 of the other flame ports 8. Furthermore, even during combustion under low oxygen conditions, the long flames 12 and the short flames 12a are arranged next to each other, so the long flames 12 suppress the lifting of the short flames 12a.

Effects of the Invention As described above, the present invention has a large number of flame holes provided in parallel on the upper surface in the longitudinal direction, and small flame holes whose width in the short side direction of the flame holes is approximately halved are arranged every other one. Therefore, the flame length of the small flame port can be made shorter than that of the large flame hole (this allows the supply of secondary combustion air to the inner array of flame holes to be abundant, and the flame length of the entire burner can be shortened. , it is possible to prevent incomplete combustion.

In addition, the alternating arrangement of large and small flame ports allows the large and small flame ports to sit next to each other, which prevents short flames from attempting to lift during combustion in low oxygen conditions. By suppressing the long flame, a stable combustion state can be maintained and the generation of CO, which is harmful to the human body, can be prevented.

[Brief explanation of the drawing]

1 and 2 show a gas burner according to an embodiment of the present invention, FIG. 1 is a perspective view of its flame opening, FIG. 2 is a side view of the same, and FIG. 3 is a flame of a conventional gas burner. A perspective view of the mouth part, FIG. 4 is a plan view of the same, FIG. 5 is a front view of the same, and FIG.
The figure is a side sectional view of the same. 1... Burner main body, 2... Burner main body for forming an outer burner port, 3... Burner main body for forming an inner burner port, 4... Burner port partition Board, 8...large flame outlet, 8a...small flame outlet. Name of agent: Patent attorney Shigetaka Awano Haka 1 person 4.5--
One flame. t-・Daishoi Attack 7-Kozai Yazu

Claims (1)

[Claims] A large number of burner ports arranged in multiple rows on the upper surface along the longitudinal direction are provided on the burner body for forming the inner burner port, the burner main body for forming the outer burner port, and the burner body for forming the inner burner port and the burner body for forming the outer burner port. A gas burner in which small burner ports are arranged every other time, and the burner ports are sandwiched between the burner ports and a burner port partition plate that separates the burner ports.