JP2522988B2 - Gun type burner - Google Patents

Description

TECHNICAL FIELD The present invention relates to a gun type burner used for a water heater, a hot water heater, or the like.

(B) Conventional technology For example, in Japanese Utility Model Publication No. 62-18809, a nozzle is housed in a cylinder, a flame holding plate having a spray opening in the center is provided in front of the nozzle, and the nozzle tip and the flame holding plate are provided. There is disclosed a gun type burner in which the tip of the spark plug is located between and.

(C) Problem to be Solved by the Invention In the above-mentioned conventional technique, the spark generated at the tip of the spark plug at the time of ignition of the burner is disturbed by the primary air flowing along the side wall of the cylinder in the cylinder and is ejected from the nozzle. There is a possibility that the fuel may not reach the fuel, and the ignitability may decrease.

The present invention has been made in view of the above facts,
The purpose of the present invention is to prevent turbulence due to the primary air of the ignition spark to improve the ignitability and to stabilize combustion and reduce combustion noise.

(D) Means for Solving the Problems In the present invention, an outer cylinder to which combustion air from a blower is supplied, and a bottomed cylinder housed in the outer cylinder and provided with a primary air port at the bottom thereof are provided. Body, a nozzle facing the inside of the cylinder, a flame holding plate provided in front of the nozzle and having an opening in the central portion facing the nozzle, and an electric discharge between the nozzle and the opening of the flame holding plate. And a combustion chamber provided in front of the flame holding plate, the cylindrical body has a tapered tapered portion at the tip, and the tip opening portion of the throttle is Airtightly connected to the opening of the central portion of the flame holding plate, the flame holding plate has a plurality of stabilizer blades radially cut and raised from the vicinity of the opening of the central portion,
A plurality of air openings are provided in the outer peripheral portion of the plurality of secondary air openings formed by cutting and raising these stabilizer blades.

(E) Action The cylindrical body has a tapered tapered throttle portion at the tip, and the tip opening of this throttle is airtightly connected to the central opening of the flame holding plate, so All of the primary air that has flowed into the cylindrical body is guided by the inclined surface of the tapered tapered throttle portion, and flows toward the opening in the central portion of the flame holding plate without turning. Therefore, the sparks generated in the discharge part of the spark plug are not disturbed by the flow of the primary air, and the flow of the primary air always causes the sparks to fly within the ejection range of the liquid fuel ejected from the nozzle. Is possible, and the ignitability is remarkably improved.

Since the opening at the tip of the throttle is airtightly connected to the opening at the center of the flame holding plate, the combustion air mixes with the fuel ejected from the nozzle and flows out from the opening at the center of the flame holding plate. Since the air is split into the air and the secondary air flowing out from the secondary air port of the flame stabilizing plate formed by cutting and raising the multiple stabilizer blades, the amount of the primary air mixed with the jetted fuel is changed by the cutting and raising of the stabilizer blades. It can be quantified regardless of the height variation, and combustion can be stabilized.

The flame-holding plate has a plurality of air openings on the outer periphery of the secondary air openings, and a part of the secondary air is supplied to the combustion chamber from these air openings, so it is formed by cutting and raising multiple stabilizer blades. It is possible to moderately weaken the swirling flow without disturbing the swirling flow flowing from the secondary air port to the combustion chamber,
It is possible to prevent the lift of the flame, maintain good combustion, and reduce combustion noise.

(F) Embodiment Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

In FIG. 1, (1) is a cylindrical body housed in an outer cylinder (21), and a bottom plate (2) of this cylindrical body (1) has a nozzle (4) and an ignition by an attachment (3). A plug (5) is attached. A plurality of primary air passages (6) are formed in the fixture (3) around the nozzle (4).
A primary air port (7) is formed between the spark plug (5) and the peripheral portion of the bottom plate (2). (8) is a ring (throttle) fixed to the tip of the tubular body (1),
The ring (8) is formed by drawing a tapered taper so that the diameter becomes gradually smaller. The electrode (5a) of the spark plug (5) extends obliquely along the ring (8), and the tip discharge part of the electrode (5a) is located in front of the ejection port (4a) of the nozzle (4). .

(10) is a flame stabilizer (stabilizer), and an opening (12) for fuel injection is formed at the center of the flame stabilizer (10),
A flange (8a) as an opening of the tip of the ring (8) is airtightly fitted into the opening (12). Also, (30),
Reference numeral (30) is a fixing member for fixing the cylindrical body (1) and the flame holding plate (11). (13) ... are stabilizer blades formed by radially cutting and raising the flame stabilizing plate (10), and each blade (13) ... is formed from the central portion to the outer peripheral portion, and each blade (13) is raised and raised. Has a larger outer peripheral portion than the central portion. Also, each wing (13)
The secondary air port (14A) is formed corresponding to.
Further, a plurality of secondary air ports (14B) ... Are formed on the outer peripheral portion of the flame holding plate (10). (15) is an inner cylinder, and this inner cylinder (15) defines a combustion chamber (16) connected to the outer peripheral flange (10A) of the flame holding plate (10). Also (17) ...
(18) ... And (19) ... are secondary air ports formed in the inner cylinder (15), and (20) is a flame port. An air passage (22) is formed between the outer cylinder (21), the inner cylinder (15) and the cylinder body (1). Furthermore, (23) is the inner cylinder (1
A connecting tool for connecting the upper part of 5) and the upper part of the outer cylinder (21), and the connecting tool (23) has a plurality of tertiary air ports (24).

The operation of the gun type burner will be described below. During ignition, a blower (not shown) is operated to supply combustion air to the gun-type burner as shown by the arrow. Then, the primary air flows through the primary air passage (6) and the primary air port (7) in the cylindrical body (1). Here, the primary air that has entered the tubular body (1) is squeezed by the ring (8) as indicated by the arrow in the tubular body (1), and obliquely along the inner wall of the ring (8). That is, the spark plug (5)
Flow toward the opening (12) substantially parallel to the electrode (5a). Then, it flows from the opening (12) into the inner cylinder (15). In addition, the secondary air is the secondary air port (14A) ..., (14B) ..., (17) ..., (1
8), and (19), and flow into the inner cylinder (15). Here, the direction of the secondary air that has passed through the secondary air ports (14A) of the flame stabilizing plate (10) is changed by each blade (13), and the inner cylinder (1
5) Turn inside to flow.

Further, the liquid fuel is atomized and ejected from the nozzle (4) in the range of chain line arrows (26) and (27). Here, when a spark is generated from the tip of the spark plug (5), the spark flies along the flow of the primary air in the tubular body (1) and the center line (31) of the gun type burner and the nozzle (4). Reach to the neighborhood. Then, the fuel ejected from the nozzle (4) is ignited, and the flame is ejected from the flame port (20).

According to the above-mentioned embodiment, the primary air passage (6) of the bottom plate (2) of the tubular body (1) and the primary air that has passed through the primary air port (7) are throttled by the ring (8), and the air passage ( 22) Spark plug (5) along the inner wall of ring (8) without leaking
Flows substantially parallel to the electrode (5a) toward the opening (12). Therefore, the spark generated at the tip of the electrode (5a) at the time of ignition of the burner is not disturbed by the primary air, and the center line (3
It is possible to fly toward 1) and always fly the spark within the range of the fuel ejected from the nozzle (4), and improve the ignitability of the fuel during ignition.

Incidentally, in the above embodiment, the cylindrical body (1) and the ring (8)
Although and are formed separately, they may be formed integrally.

A primary air port (7) is formed between the bottom plate (2) of the tubular body (1) and the spark plug (5), and the primary air that has passed through the primary air port (7) is As it hits the ring (8) and flows toward the center line (31) along the inner wall of the ring (8) without leaking to the outside of the tubular body (1) and the ring (8), it flows at the tip of the electrode (5a). The primary air flow can be further directed to the centerline (31), which results in electrodes (5a)
It is possible to further improve the ignitability at the time of ignition by flying the spark generated from the above toward the center.

Further, the flange (8a) at the tip of the ring (8) provided at the tip of the tubular body (1) has an opening (1) at the center of the flame stabilizing plate (10).
Since it is airtightly connected to 2), the combustion air supplied from the blower (not shown) to the outer cylinder (21) mixes with the fuel ejected from the nozzle (4) and the flame holding plate (10). ) The primary air flowing out from the opening (12) in the central part of the), and the secondary air flowing out from the secondary air port (14A) of the flame holding plate (10) formed by cutting and raising the plurality of stabilizer blades (13). Since it is divided into two parts, the amount of primary air mixed with the jetted fuel is adjusted to the stabilizer blade (1
Quantification can be performed regardless of the variation in the cut and raised height in 3), and combustion can be stabilized.

Further, the flame holding plate (10) is provided with a plurality of secondary air ports (14B) on the outer periphery of the secondary air port (14A), and a part of the secondary air is burned from these secondary air ports (14B). Since it is configured to supply to the chamber (16), from the secondary air port (14A) formed by cutting and raising the plurality of stabilizer blades (13), the combustion chamber (1
It is possible to moderately weaken the swirl flow flowing to 6) without disturbing it, prevent lift of the flame, maintain good combustion, and reduce combustion noise.

(G) Effect of the Invention As described above, according to the present invention, the cylindrical body has the tapered tapered throttle portion at the tip portion, and the tip opening portion of this throttle portion is airtight to the opening in the central portion of the flame stabilizing plate. Since all of the primary air that has flowed into the cylinder from the primary air port is guided to the slope of the tapered tapered throttle, it does not swirl and travels toward the opening in the center of the flame holding plate. The sparks generated in the discharge part of the spark plug are not disturbed by the flow of the primary air, and the flow of the primary air always keeps the spark within the spray range of the liquid fuel sprayed from the nozzle. Not only can it be blown away and the ignitability is significantly improved, but the air for combustion can be used as fuel injected from the nozzle by airtightly connecting the opening at the tip of the throttle to the opening at the center of the flame holding plate. Mix flame retardant Amount of primary air that can be split into primary air that flows out from the opening in the center and secondary air that flows out from the secondary air port of the flame stabilizer formed by cutting and raising multiple stabilizer blades, and that mixes with the ejected fuel However, it can be quantified regardless of the variation in the cut and raised height of the stabilizer blades, stabilizing the combustion, and
The flame holding plate is provided with a plurality of air openings on the outer periphery of the secondary air opening,
Since a part of the secondary air is supplied to the combustion chamber from these air ports, the swirling flow that flows from the secondary air ports to the combustion chamber, which is formed by cutting and raising multiple stabilizer blades, is not disturbed It is possible to appropriately weaken the flow, prevent lift of the flame, maintain good combustion, and reduce combustion noise.

[Brief description of drawings]

1 and 2 show one embodiment of the present invention. FIG. 1 is a schematic sectional view of a gun type burner, and FIG. 2 is a schematic oblique view of a throttle portion. (1) …… Cylinder, (4) …… Nozzle, (5) …… Ignition plug, (7) …… Primary air port, (8) …… Ring (throttle), (8A) …… Flange ( Tip opening), (10) ……
Flame retaining plate, (12) …… Aperture, (13) …… Stabilizer blade, (14
A) …… Secondary air port, (14B) …… Secondary air port (air port), (21) …… Outer cylinder.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiromi Fujio 2-18 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor Kenfumi Monma 2-18-3 Keihanhondori, Moriguchi-shi, Osaka Within Yoko Electric Co., Ltd. (56) Bibliography Sho 60-185829 (JP, U) Shokoku 44-24630 (JP, Y1)

Claims (1)

(57) [Claims] 1. An outer cylinder to which combustion air from a blower is supplied, a bottomed cylinder housed in the outer cylinder and having a primary air port at the bottom, and the cylinder facing the inside. A nozzle; a flame holding plate provided in front of the nozzle and having an opening at a central portion facing the nozzle; an ignition plug having a discharge portion facing between the nozzle and the opening of the flame holding plate; A combustion chamber is provided in front of the flame plate, and the cylindrical body has a tapered tapered throttle portion at a tip portion thereof, and a tip opening portion of the throttle portion is airtight in an opening at a central portion of the flame holding plate. The flame holding plate has a plurality of stabilizer blades that are radially cut and raised from the vicinity of the opening of the central portion, and a plurality of secondary air ports formed by cutting and raising each of these stabilizer blades. A gunta characterized by having a plurality of air openings on the outer periphery. Pubana.