JPH03160205A - Burner - Google Patents

Abstract

PURPOSE:To utilize the radiation heat from the combustion flame and widen the width of combustion by providing an air storage chamber on one side of a row of flame holes. CONSTITUTION:Kerosene is sprayed from a supply air nozzle 7 into a vaporization chamber 5 together with primary air (a minimum volume of air required for forming a mixture gas) from a supply air nozzle 6, and it is vaporized on the wall face of a burner body 3 that is preheated by a heater beforehand. In the vaporization chamber 5 the vaporization gas of kerosene in the vaporization chamber 5 is mixed with the primary air to produce a mixture gas, and after this mixture gas has its flow straightened by a flow straightening plate 13, it is blown out from a flame hole 15. The mixture gas that is blown out from the flame hole 15 is ignited by an ignition device and secondary air which has been heated beforehand is supplied amply from a secondary air hole 17, and the mixture gas burns near the wall face where the secondary air is supplied. Since the secondary air is heated beforehand, the mixture gas has a good ignitability in comparison with the case in which cold secondary air is supplied, and, furthermore, the state of combustion can be made good.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application This invention relates to a combustion device such as a kerosene heater used in general households.

(Example) Conventional technology The conventional technology for combustion equipment is Utility Model Publication No. 63-44654.
There are some that are listed in the publication. This combustion device is
A secondary air hole is provided in the wall surface facing the flame of the air storage chamber, which is equipped with a flame opening section having a large number of flame openings arranged in two rows, and an air storage chamber provided on both sides of the flame opening section. supplies secondary air to the combustion flame.

(c) Problems to be Solved by the Invention In the above-mentioned combustion device, since the air storage chamber is provided to surround the combustion flame from both sides, it has the disadvantage that the radiant heat from the combustion flame cannot be used effectively for heating, etc. there were.

In addition, since the primary air accounts for most of the combustion air, for example, 80% to 90% of the mixed gas ejected from the flame port, the volume of the mixed gas is large, and the speed of the mixed gas ejected from the flame port is large. Since the amount of combustion is large, when the amount of combustion is large, the combustion flame will blow out and the combustion sound will increase, and when the amount of combustion is small, there will be backfire of the combustion flame and the vicinity of the burner's mouth due to burning. This has the disadvantage that it is difficult to widen the range of combustion because overheating occurs.

This invention (well, radiant heat from combustion flame can be used, and
This provides a combustion device with a wide range of combustion.

(2) Means for Solving the Problems In order to solve the problems of the prior art described above, the present invention provides a Harner POD equipped with a supply passage for liquid fuel such as kerosene and primary air, and a mixture of primary air and vaporized air. In the combustion apparatus, the primary air supply passage has a small amount [for example, about 10 to 20 of the amount of combustion air] sufficient to vaporize the liquid fuel.
%] has a structure for supplying primary air, and the burner section has flame ports arranged in a straight line, an air storage chamber arranged on one side of the row of flame holes, and the flame holes of this air storage chamber. The facing wall and
Formed on this wall surface, at a position where secondary air is along the side of the combustion flame (e.g., a position where secondary air is supplied between the combustion flames), the mixed gas is completely removed. a secondary air hole that supplies sufficient secondary air for combustion (e.g., about 80 to 90% of the combustion air);
The wall surface of the gas storage chamber is provided parallel to a plane formed by an axis in the direction in which the flame ports are lined up and an axis in a direction in which the mixed gas is ejected from the flame ports.

(Thu) Effect In the combustion device according to the present invention, since the air storage chamber is provided only on one side, the radiant heat of the combustion flame is directed to the outside of the burner section from the other side where the air storage chamber is not provided. The radiant heat can be effectively used for heating, etc.

Furthermore, since the combustion apparatus according to the present invention is configured to supply about 10 to 20% of the combustion air as secondary air, the ejection speed of the mixed gas from the flame port is low.
Moreover, this mixed gas alone does not cause combustion, but secondary air is supplied at a predetermined position to start combustion. For this reason,
Even if the combustion amount is increased, the combustion flame will not blow out and loud combustion noise will be suppressed.Also, even if the combustion amount is decreased, there will be no backfire or
Since combustion flames are not formed near the flame nozzle, overheating near the flame nozzle is also suppressed.

〈〈〉〉Embodiment An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view of a main part of a combustion device according to the present invention, and FIG. 2 is a sectional view of a main part of the same combustion device taken along the line I[-IF shown in FIG. 1. is used in household heaters such as kerosene fan heaters.

The combustion device shown in these figures mainly consists of a burner part (1) that burns a mixed gas of kerosene vaporized gas and primary air, and a burner body (3) that has a burner case (2) on the outside. It is configured.

A heater (4) is buried in the bottom of the burner body (3), and an air supply nozzle (6) for supplying primary air and a nozzle (7) for supplying kerosene face the vaporization chamber (5).
is installed. In addition, (8) is the air supply nozzle (6>
This is the air supply pipe connected to the Reference numeral (9) denotes a rectifying plate for rectifying the mixed gas, and this rectifying plate is installed in the middle of the mixed gas passage <10). (11) is a passage for secondary air from the air supply pipe (22>), and the secondary air in this passage passes through the secondary air hole (12) formed at the top of the burner podium (3), and then passes through the burner podium (3). After being rectified by a fluid rectifier (13) attached to the upper part of the body (3), it is sent to an air storage chamber (14).

Next, the burner section (1) will be explained. (15) are flame ports arranged in a horizontal row, and the air storage chamber (14) is provided on one side of the row of flame ports (15). (16)
is the wall surface facing the flame port (15) of the gas storage chamber (14), and this wall surface (16) is aligned with the axis in the direction in which the flame port (15) is lined up, and the direction in which the mixed gas flows at the flame port (15). (17) is a secondary air hole provided in the wall surface (16), and from this secondary air hole <17) there is a passage ( 11) and holes (12), heat exchange is performed and warmed secondary air is supplied. Also, as shown in Figure 2, the secondary air holes (17) and the combustion flame.

Therefore, the secondary air from the secondary air hole (17) is not supplied toward the center of the combustion flame, but is supplied along the peripheral side of the combustion flame.

In addition, (19) connects the upper part of the passage (10) to the flame port (15).
) for forming the lower wall surface (20
), as shown in FIG. 2, a burner port forming member (21) shaped like a comb-shaped plate is narrowed between the burner ports (15) to form a row of burner ports (15).

In addition, in this combustion device, a small amount of primary air to create the mixed gas is supplied, for example, about 10 to 20% of the combustion air, and the remaining combustion air is supplied as secondary air, so the amount of secondary air supplied is is as much as 80-90% of the amount of air required for combustion.
As the combustion amount increases or decreases, the supply amount of secondary air is mainly increased or decreased, and the air-fuel ratio is kept approximately constant.

In the combustion device configured in this way, kerosene is transported from the nozzle (7) to the vaporization chamber (
5) and vaporizes on the wall of the burner body (3), which was previously heated with the heater (4). Vaporization chamber (5)
The vaporized gas of the kerosene and the primary air are mixed to form a mixed gas, which is rectified by the rectifying plate (13) and then ejected from the flame port (15). The mixed gas ejected from the flame port (15>) is ignited by an ignition device (not shown), and a sufficient amount of pre-warmed secondary air is supplied from the secondary air hole (17). Wall surface (1
6) Burns nearby. Since the secondary air is warmed in advance, the ignition performance is better and the combustion state is also better than when cold secondary air is supplied.

In this combustion apparatus, the primary air from a blower (not shown) is about 10 to 2 times the amount of air necessary for combustion.
About 80 to 90% of the amount of air required for combustion is supplied as secondary air. The volume of the mixed gas [a mixture of vaporized kerosene gas and primary air] is smaller than that of the mixed gas, where most of the air required for combustion is supplied as primary air, since there is little primary air. The volume of the mixed gas is small, the jetting speed of the mixed gas from the flame port (15) is slow, and the combustion noise is small. Furthermore, since secondary air is supplied from the secondary air hole (17) along the side of the combustion flame formed at the flame port (15) [for example, between the combustion flames], Compared to a system in which secondary air is supplied toward the center of the combustion flame, the noise caused by the supply of secondary air is smaller, and the combustion flame is less likely to be disturbed, which contributes to stable combustion.

In addition, in the combustion device according to the present invention, since the amount of primary air is small and the mixed gas does not burn by itself, combustion occurs only when secondary air is supplied, a combustion flame is formed at a predetermined position and burns, resulting in small combustion. When the combustion flame is changed, backfire is suppressed, and overheating of the vicinity of the flame nozzle (15) [member (l9>, lower wall surface (20), flame nozzle forming member (21)) is suppressed [the combustion flame reaches a predetermined level]. position], and also,
The blowout of the combustion flame is suppressed when the combustion is changed to large combustion. In this way, backfire and overheating near the flame port (15) are suppressed during small combustion, and blowing out of the combustion flame is suppressed during large combustion, so the combustion device of the present invention has a wide combustion range. .

Furthermore, in this combustion device, since the storage chamber (14) is provided only on one side of the row of flame ports (15), the radiant heat of the combustion flame from the other side can be effectively used for heating, etc. It is also possible to visually convey warmth and check the combustion status.

FIG. 3 shows a sectional view of the main parts of another embodiment. In this figure, (30) is a burner body heating plate that receives radiant heat from the combustion flame of the burner section (1), and this burner body heating plate is It is provided integrally with the burner body (3). In the combustion device equipped with this burner body heating plate (30), the burner body heating plate (30) is heated by the combustion flame, and the heat of the burner body heating plate (30) is transmitted to the burner body (3). Therefore, the time during which electricity is applied to the heater (4) at the start of combustion or during combustion can be shortened, and in this combustion device, power consumption in the heater (4) is reduced.

Note that the same reference numbers are given to the same components as those of the combustion apparatus shown in FIGS. 1 and 2.

(G) Effects of the Invention As explained above, according to the present invention, since the air storage chamber is provided only on one side of the row of flame ports, the radiant heat of the combustion flame can be effectively used, and the primary air Since the amount of the mixed gas is small and the volume of the mixed gas is small, it is possible to provide a combustion device in which the ejection speed of the mixed gas ejected from the flame port is low and the combustion range is wide.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of the main part of the combustion device according to the present invention; FIG. <1) Burner L (3) Burner body, (10) Mixed gas passage, 14> Air storage chamber, (15> Burner port, (l6)・Wall surface,
(17)...Secondary air hole.

Claims (1)

[Claims] (1) In a combustion device having a burner body having a supply passage for liquid fuel and primary air, and a burner section for burning a mixed gas of primary air and liquid fuel, the primary air supply passage is for supplying liquid fuel. It has a structure that supplies a small amount of primary air sufficient for vaporization, and includes flame ports arranged in a straight line from which the mixed gas is ejected, and an air storage chamber provided on one side of the row of flame ports. The burner part is provided with a wall surface facing the flame opening of the air storage chamber and a secondary air hole formed in this wall surface, and the secondary air hole is arranged so that the secondary air follows the side of the combustion flame. The air storage chamber has a structure that supplies sufficient secondary air to completely burn a mixed gas of vaporized liquid fuel and primary air at a certain position, and the wall surface of the air storage chamber is
A combustion device characterized in that the combustion device is provided parallel to a plane formed by an axis in a direction in which the flame ports are lined up and an axis in a direction in which mixed gas is ejected from the flame ports.