JPH0311207A - Combustion equipment - Google Patents

Abstract

PURPOSE:To prevent a combustion flame formed on a frame hole net from its extension to form a compact fire and enlarge a satisfactory combustion range by dividing perforated flame holes by a plurality of secondary air blowout paths and providing a gap below the frame holes adjacent to the heat receiver of a mixing chamber and a straightening panel with a plurality of through-holes. CONSTITUTION:The secondary air rises around a mixing chamber 34, flows into a secondary air blowout path 37 from a secondary air path 39, is blown out from a secondary air blowout hole 40 to wrap each combustion flame 45 and reduce the length of the flame, accelerating a high load combustion. Since the combustion flames 45 adjacent to a heat receiver 41 are suppressed in the amount of evaporated gas by the through-holes 44 of a straightening panel 43, the extension of the combustion flame 45 formed on the perforated flame holes 38 adjacent to the heat receiver 41 is suppressed in the air shortage and the combustion can be prevented from being aggravated even when one side of the secondary air blowout path 37 is removed for receiving heat. Further, since a gap 42 is provided, the evaporated gas divided by the through-holes 44 is equalized to enable the combustion flame with a uniform flame length to be formed on the flame holes 38 and to dissolve an unevenness in received heat.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to the structure of a combustion device used in household water heaters and the like.

BACKGROUND OF THE INVENTION Conventionally, this type of combustion apparatus has had a structure as shown in FIG.

That is, 1 is a heater, 2 is a vaporizer cylinder, 3 is a vaporizer cylinder lid,
4 is a flame hole plate, 5 is a flame hole net, 6 is a flame hole cap, 7 is a rotor, 8 is a swinging plate, 9 is a mixing blade, 10 is a fuel supply pipe, 11 is a heat insulating material, 12 is a combustion fan, 13 is 14 is a fuel supply pump, 15 is an oil receiving tank, and 16 is a vaporization surface.

When the heater 1 is energized and the temperature of the vaporizing tube 2 rises to a predetermined temperature, the heater 13 is driven, and the rotor 7, swing plate 8, mixing blade t19, and combustion fan 2 rotate.

On the other hand, fuel is supplied to the oil receiving tank 1 by the fuel supply pump 14.
The fuel is pumped up from the rotor 7 through the fuel supply pipe 10.
Due to the centrifugal force of the rotor 7 and the swinging plate 8, which rotate while being supplied to the top, the water is uniformly scattered from the outer circumference of the swinging plate 8 and is atomized. The atomized fuel is vaporized on the vaporization surface 16 of the inner wall of the heated vaporization cylinder 2, and mixed with combustion air supplied by the combustion fan 12.
It becomes a mixture.

The air-fuel mixture is further uniformly mixed by the rotating mixing blade 9, and is ejected from the flame hole net 5 through the vaporizing tube cover 3 and flame hole plate 4, and is ignited by an igniter (not shown) to be combusted.

Thereafter, the upper outer periphery of the vaporization tube 2 and the top surface of the vaporization tube lid 3 receive the heat of the combustion flame 17 and transfer it to the vaporization surface 16 to promote vaporization, so that the heater is de-energized.

Problems to be Solved by the Invention However, in the above configuration, the combustion flame 17 is formed continuously over a wide area of the flame hole net 5, so that the combustion flame 17 comes into contact with the air existing outside the combustion flame 17. There were fewer opportunities to do so, and the flame length of combustion flame 17 could not be shortened. In addition, since a part of the combustion flame 17 near the upper end of the outer periphery of the carburetor tube 2 and the upper surface of the carburetor tube cover 3 is not made independent to improve flame stability, it is not possible to increase or decrease the combustion amount or change the amount of combustion air. Therefore, there was a problem in that an unstable combustion flame 17 was always formed, and the combustion range could not be expanded satisfactorily.

The present invention solves these conventional problems by preventing the combustion flame formed in the flame hole net from elongating, and also by preventing the flame holding of a part of the combustion flame formed near the upper end of the outer periphery of the vaporizer cylinder. to form a compact flame,
The purpose is to expand the range of good combustion.

Means for Solving the Problems In order to solve the above-mentioned problems, the combustion device of the present invention divides a porous flame hole into a plurality of secondary air jetting passages, and a flame adjacent to a heat receiving part of a mixing chamber. It has a structure in which a rectifier plate having a plurality of through holes is provided with a gap below the hole.

Effect of the present invention With the above-described configuration, the combustion flame is finely divided and secondary air is sufficiently supplied around it, so that the combustion flame is prevented from elongating, and the combustion flame is divided into small pieces, and the combustion flame is prevented from elongating. Since the flame holding of the combustion flame formed during combustion is stabilized and the appropriate amount is adjusted, deterioration of combustion characteristics can be prevented, a compact flame can be formed, and the combustion apparatus can be downsized.

Embodiment Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings.

1 and 2, reference numeral 18 denotes a carburetor with a built-in heater 19, and an air-fuel mixture outlet 20 is provided at the top of the carburetor 18.
is provided, and a vaporizing air supply 21 is provided below it. Through this vaporizing air population 21, the vaporizing H1
A cutting plate 22 using a flat disc and a conical rotor 23 are provided within the rotor 8 . The swinging plate 22 and rotor 23 are
A motor shaft 24 and a motor 25 are connected. Rotor 2
One end of a fuel supply pipe 26 is placed close to the lower side of the fuel supply pipe 3 with a gap therebetween, and the other end is connected to a fuel supply pump 27 . Further, a carburetor cover 29 is provided around the carburetor 18 with a heat insulating material 28 in between. The heat insulating material 28 and the carburetor cover 29 are provided with a mixture gas outlet 20 and a vaporizing air port 21 penetrating therethrough. A primary air chamber 30 is provided around this carburetor cover 29, and this primary air chamber 30 is used for air blowing i! It is connected to an air passage 32 communicating from 131. A primary air chamber 30 is provided with a gap above the air-fuel mixture outlet 20 of the carburetor 18 and the surrounding carburetor cover 29.
A mixing chamber 34 is provided that is isolated from the vaporizer 18 via a conveying air passage 33 that communicates with the vaporizer 18 . A mixture inlet 35 is provided at the bottom of the mixing chamber 34 at a position opposite to the mixture outlet 20 of the carburetor 18 . A plate-shaped mixing plate 36 is provided in the mixing chamber 34 above the air-fuel mixture inlet 35 . A porous flame hole 39 made of a punched plate or the like divided by a plurality of secondary air jetting passages 37 is provided in the upper part of the mixing chamber 34 . The upper ends of the secondary air jetting passage 37 and the flame hole 38 are connected in a substantially planar manner. The secondary air jetting passage 37 is provided in a configuration that does not communicate with the mixing chamber 34, and communicates with a secondary air passage 39 that is provided around the mixing chamber 34 and communicates with the primary air chamber 30 and the conveying air passage 33. ing. At the upper part of the secondary air blowout passage 37, there are a plurality of
A secondary air ejection hole 40 is provided.

Further, a heat receiving section 41 is provided by erecting a part of the side wall of the mixing chamber 34 higher than the flame hole 38 and the secondary air jetting passage, and a part of the flame hole 38 is provided adjacent to the heat receiving section 41. In particular, below the adjacent flame holes 38 (located on both sides of the mixing chamber 34), a rectifying plate 4 is inserted through a gap 42.
3 is provided, and this current plate 43 is provided with a plurality of through holes 44. 45 is a combustion flame.

Next, the operation of the configuration of this embodiment will be explained. First, by operating the fuel supply pump 27, fuel is supplied to the rotor 23 through the fuel supply pipe 26, and as the motor 25 rotates, the fuel rises along the conical side surface of the rotating rotor 23 via the motor shaft 24. It is atomized and scattered from the shaker plate 22, and is vaporized on the side wall heated by the heater 19 of the vaporizer 18. This vaporized gas is carried out from the air-fuel mixture outlet 20 when vaporizing air flows in from the air passage 32 from the vaporizing air port 21 of the carburetor 18 . Most of the air passes through the blower passage 32 from the blower 31 and is divided into conveyance air and secondary air. wIi The air for feeding flows into the air mixture inlet 35 of the mixing chamber 34 from the conveying air passage 33 together with the vaporized gas carried out from the air mixture mouth 20 of the carburetor 18, and is mixed with the air for conveying by the mixing plate 36. Mixing of the gas is promoted and rises in the mixing chamber 34 and reaches the flame hole 38.
The secondary air is ignited by an igniter (not shown) to cause combustion.Meanwhile, the secondary air rises around the mixing chamber 34, flows from the secondary air passage 39 into the secondary air jet passage 37, and the secondary air It is ejected from the ejection hole 40 and envelops the combustion flame 45 formed on the flame hole 38, shortens the flame length, and promotes high-load combustion.

The flame 38 adjacent to the heat receiving part 41 is transmitted to the rectifying plate 4
Since the amount of vaporized gas is suppressed by the through holes 44 of No. 3, even if one side of the secondary air jetting passage 37 is removed for heat reception, there is insufficient air on the flame 38 adjacent to the heat receiving part 4I. By suppressing the elongation of the flame length of the combustion flame 45 that is formed, deterioration of combustion can be prevented. In addition, when there is excess air, the zero gap 42 is provided to prevent the combustion flame 45 from lifting or blowing away and to always receive stable heat, so that the vaporized gas divided by the through holes 44 is made uniform. A combustion flame with a uniform flame length can be formed on the flame hole 38, and uneven heat reception can be eliminated. Since stable heat is always transmitted to the heat receiving section 41, the mixing chamber 34 is kept at a constant temperature, preventing condensation of vaporized gas and preventing the generation of white smoke when extinguishing a fire.

Effects of the Invention As described above, the present invention provides a baffle plate having a through hole with a gap below the flame hole installed in the heat receiving part of the mixing chamber. Even though the ejection passage is on both sides, the amount of vaporized gas is suppressed to an appropriate amount, preventing the flame length from increasing when there is insufficient air, and suppressing the flow velocity of vaporized gas when there is excess air, preventing lift of the combustion flame. However, the combustion range can be expanded satisfactorily.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a main part of a combustion device according to an embodiment of the present invention, FIG. 2 is a side view of the combustion device, and FIG. 3 is a partial sectional view of a conventional combustion device. 34...Mixing chamber, 38...Flame hole, 41
... Heat receiving part, 42 ... Gap, 43 ...
... Rectifying plate, 44 ... Through hole.

Claims (1)

[Claims] A mixing chamber is provided above the fuel vaporization means via a primary air passage, a porous flame hole is provided above the mixing chamber, and the flame hole is divided into a plurality of pieces. ,
and a plurality of secondary air jetting passages that do not communicate with the mixing chamber, a plurality of secondary air jetting holes provided at the upper end of the secondary air jetting passages, and a plurality of secondary air jetting holes provided around the mixing chamber,
A secondary air passage communicating with an end of the secondary air blowing passage, and a heat receiving part provided above a part of the side wall of the mixing chamber and adjacent to a part of the flame hole. and a baffle plate having a plurality of through holes provided below the flame hole adjacent to the heat receiving part with a gap therebetween.