JPS59125308A - Burning device - Google Patents

Abstract

PURPOSE:To permit reliable and easy ignition of an ignitor even if it is low in ignition energy, by a method wherein mixture gas injected from a whole combustion plate is ignited by means of a pilot flame. CONSTITUTION:Liquid fuel, heated and evaported, gathers in a throttle cylinder 8A of a throttle plate 8 as it is mixed with the air for combustion present therearound, and mixture concentation is uniformized. The mixture gas is injected to above the level of the throttle cylinder 8A of the throttle plate 8, holding directional property, and reaches the outer surface of a combustion plate 9 through very fine pores formed in a labyrinthian state. However, since mixture gas, flowing out to the outer surface, becomes lean immediately, ignition is very hard to make. Thereby, a part of the mixture gas is forced to pass through a notched passage 9C in a flange part 9B and to reach burner port part 24 of an annular lock plate 23, the mixture gas is ignited by the use of an ignitor device 25, and most of the mixture gas flowing out through the whole combustion plate 9 is ignited by means of pilot flame 26.

Description

[Detailed description of the invention]

This invention relates to a combustion device, and relates to an ignition device in a combustor that uses a new combustion plate for 2%. Mix fuel and combustion air to create a mixed gas. In the type of combustion device that burns this mixed gas, a flame port is generally formed between the combustion plate and the carburetor cylinder, or on the combustion plate itself, and the mixed gas is ejected from this flame port and combusted. It is true. However, in such combustion equipment, a large amount of NOx is generated due to the high flame temperature, and if the combustion equipment is an open type, the NOx will be released into the room, which is not good for health, and the combustion equipment may be damaged. If it is a closed type, the NOx will be released outdoors and cause pollution. For this reason, the combustion plate is formed from a sintered body without two ventilation holes, and is generally referred to as a flat plate-shaped Schbank plate, which has a small number of square flames extending from the surface on the side of the mixing chamber to the outer surface. Using a combustion plate, the contact between the flame and the Schbank plate,
It is also well known that a flame temperature of 140x can be lowered by increasing the J product and lowering the flame temperature of 18-1.
There is a limit to how many small flames can be formed.
Low NO compared to those formed between the combustion plate and the vaporization tube.
Even though efforts are being made to improve the situation, it is not sufficient. Here, the inventors proposed a method in which the combustion plate is formed of a porous sintered body to reduce NOx. However, in the above-mentioned new combustion plate, the outer surface 4゛I
Because of the wide ``i'', the mixed gas that came out on the surface of the outer jacket quickly became scarce, and in order to ignite it, it was necessary to use an ignition device with a large ignition radius. This invention was made in order to improve this blooming point, and a part of the combustion plate made of the porous sintered body is provided with bi-D.
A passage is formed through which combustion gas in an amount capable of forming a sotoflame is passed through, and a pilot flame forming flame port is formed at the outlet of this passage, and the mixed gas ejected from this flame mouth is ignited to reach that part. By forming a pilot flame and igniting the mixed gas ejected from the entire combustion plate by the pilot flame, even an ignition device with low ignition energy per ignition can be used. The object is to provide a combustion device that can be reliably and easily ignited. An embodiment of the present invention will be described below with reference to FIGS. 1 to 4. Note that this embodiment is an embodiment in which the combustion device according to the present invention is incorporated into a hot air heater, that is, the fourth embodiment.
In the figure and Fig. 5, (+) i-bow is a box body with a hot air outlet (1A) on one front side and an intake hole (1B) on the upper rear side, and (2) is an air intake of the box body (1). The blower installed in the hole (1B) draws indoor air from the intake hole (1Jυ and blows out warm air through the upper part of the box flj) (I A)
It blows air to 'jjll. (3) refers to the combustion plate (
9) In other words, iL is the box body (1) facing the fire pit, transparent heat-resistant glass provided on the front part, (A) is the box body (1)
There is a combustion device built into the lower part of the engine. The detailed structure will be described later using FIGS. 1, 2, and 3. (4) is a hollow cylindrical reflector with a mirror-like inner surface, which is provided to surround the combustion plate (9) of the combustion device (A), and the part facing the heat-resistant glass (3) is cut out. A window portion (4A) is formed in the portion. Figures 1, 2, and 3 show the detailed structure of the above-mentioned combustion device. In Figure 2, (5) is the combustor, +61+ is the cylindrical vaporization tube forming the mixing chamber (6A), and (7) is the combustor. The preheating heater (8) is embedded in the wall of the vaporizer cylinder (6), and the aperture plate (8) is installed between the upper part of the vaporizer cylinder (6).
A). (9) is the upper opening of the mixing chamber (6A);
That is, it is a substantially hollow cone-shaped combustion plate disposed at the upper opening of the carburetor (6), the above-mentioned carburetor (6), heater (7),
and a combustor (5) together with the aperture plate (8). The combustion plate (9) is made of a porous sintered body such as a ceramic made of a hardened sponge, and unlike conventional combustion plates, it has a straight line extending from the mixing chamber side surface to the external light surface. There is no flame port, it exists in the sintered body itself. The labyrinth-like extremely small ventilation holes that run intricately along the outer surface from the mixing chamber side surface are used as flame openings. Furthermore, this combustion plate (9) has an annular flange portion (9B) around the opening (9A) as shown in detail in FIGS. 2 and 3.
) is provided integrally, and this flange part (9B)
A passageway (9C) with a partially cutout is provided in the flange portion (9B)', and the vaporization tube (6) is pressed by pressing the annular stop plate (c) toward the r vaporization tube (6) side. ) above

It is airtightly installed in [ ]. In addition, an annular stop plate (
C) is provided with a round hole or slit flame hole (2) at a location corresponding to the outlet of the passageway (9C) of the flange portion (9B), and an ignition device is placed above the flame hole Q(a). C!ω is located. Also, 0III is a nozzle connected to the wall of the vaporization cylinder (6) so that one end faces into the mixing chamber (6A), and 0υ is this nozzle 1.
1 is a slightly connected air pipe, 03 is an air volume control valve provided in the middle of this air pipe, (13 is a combustion air blower connected to the air pipe u, 04 is a nozzle (inside I) One end is a needle provided coaxially with the nozzle 0ω, and one end faces into the mixing chamber (6A) through the combustor (5 eyes and 1 opening Ll).
The other end is connected to one end of an orifice pipe (1b), which will be described later. Reference numeral 09 denotes an oil level regulator for storing a predetermined amount of liquid fuel to be supplied to the combustor (5), and an oil reservoir portion 7'1 is formed inside by a partition (15A). (↓6) is an orifice pipe whose one end is immersed in the oil sump of the constant oil level device 05), and the other end is connected to the needle α as described above.
071 is a static pressure return pipe, one end of which is connected to a constant oil level device (disposed above inside 151, and the other end is connected to an air pipe (11). (18) is an oil feed pipe, one end of which is a constant oil The other end is connected to the bottom of the oil reservoir of the tank (15), and the other end is connected to the bottom of the sub-tank 09.■ indicates the oil pipe (oil supply electromagnetic pump, CI installed in the middle of the field) is connected to the constant oil level. The overflow pipe (+22) is a cartridge tank for storing liquid fuel, and the overflow pipe (+22) is connected to the oil supply pipe O sand on the bottom surface Q of the part outside the oil sump part, and the other end is connected to the oil supply pipe O sand. The combustion fabric is configured as shown above.Next, to explain the operation of this device A1'', immediately turn on the power switch (not shown). The heater (7) is energized and the wall of the vaporizer cylinder (6) is preheated to the required temperature to vaporize the liquid fuel (1). When preheating is completed, the blower OJ is driven, the air pipe OI), and the static pressure return pipe Constant oil level gauge 0 through 0η
Air is blown within 9 hours. The combustion air blown into the air pipe 0υ is jetted into the mixing chamber (6A) through the nozzle OO. On the other hand, the electromagnetic pump (to) is also driven, and the liquid fuel stored in the subtank θl is supplied from the tank (22) to the oil reservoir in the oil level regulator 09 through the oil feed pipe 0.
The liquid fuel supplied to the oil sump at ω is transferred to the partition body (15A
), it will overflow. The oil returns to 0 seconds through the overflow pipe Qυ, and is pumped up again by the electromagnetic pump, and the fuel consumed by combustion, which will be described later, is supplied from the tank (22) to keep the oil level constant. At this time, air is blown into the oil level regulator (19) through the static pressure return pipe OD, so this air applies pressure (Pl) to the oil level, pressing the oil level and supplying liquid fuel to the needle 04 through the orifice pipe Oe. Since combustion air is ejected from the nozzle a0, the liquid fuel supplied to the needle α is atomized by the shear force of this air flow, mixes with the combustion air, and spreads into a two-cone shape while flowing into the vaporization tube. (6)
It collides with the inner wall and is vaporized. Heating vaporizes! The first liquid fuel is mixed with the surrounding combustion air and collected in the throttle tube (8A) of the throttle plate (8) to equalize the mixed concentration, and this mixed gas is. It is directionally ejected upward from the throttle tube (8A) of the throttle plate (8), and reaches the combustion shell and the outer surface of the plate (9) through the labyrinth-like extremely small ventilation holes of the combustion plate (9). However, the mixed gas that emerges from the outer surface quickly becomes diluted, making it difficult to ignite it. Therefore, in this invention, a part of the mixed gas is passed through the notch-shaped passage (9C) of the flange part (9B).
to reach the flame hole part 04) of the annular stop plate (c), and ignite the mixed gas using the ignition device □□□,
Form the pilot frame (a). This pilot flame (26) ignites most of the mixed gas coming out of the entire combustion plate (9). This combustion plate (9) burns red hot so as to cover the entire surface. Therefore, even if an ignition device with low ignition energy is used, it is possible to reliably ignite the flame.Moreover, the contact area between the combustion plate (9) and the flame is greatly increased compared to the conventional ignition plate (9), etc. The temperature will drop and NOx will be significantly reduced. Further, since the combustion plate (9) becomes red hot due to combustion, a large amount of infrared rays are emitted from the surface. The apparatus according to the present invention operates as described above. The heat generated by this combustion is blown out from the hot air outlet (1A) by the air sent by the blower (2) as shown in Figures 4 and 5, and is also reflected around the combustor (5). It is reflected by the plate (4) and the window part (4) of the reflecting plate (4)
A) and released to the outside through transparent glass (3). Heat the room. Further, in the above embodiment, in order to greatly increase the contact area between the flame and the combustion plate (9),
Furthermore, although the combustion plate (9) is shaped like a container for the purpose of increasing the combustion area within a limited space, it goes without saying that it may also be shaped like a flat plate. Further, in the above embodiments, the fuel is a liquid canister, but it goes without saying that a gas fuel may also be used. Furthermore, in the above embodiment, the rice stopper has a flame hole part 04.
), but if the stop plate @ is omitted. The outlet part of the passage (9C) of the combustion plate becomes the flame hole part. As described above, according to the present invention, the opening of the mixing chamber for mixing fuel and combustion air is made of a porous sintered body, and the combustion is performed by burning the mixed gas ejected from the pores on the surface. Along with arranging the board. A part of this combustion plate forms the VC pilot frame.
A passage is formed through which an amount of combustion gas passes through, and a pilot flame forming flame port is formed at the outlet of this passage, and the mixed gas ejected from this flame mouth is ignited to form a pilot flame in that part. Since the pilot flame ignites the mixed gas ejected from the entire combustion plate, even an ignition device with low ignition energy can be ignited reliably and easily.

[Brief explanation of the drawing]

Fig. 1 shows a device according to an embodiment of the present invention, Fig. 2 shows a device according to an embodiment of the present invention;
Figures 1 and 9 are an enlarged sectional view of the combustor, Figure 3 is an exploded external perspective view of the combustion plate and the annular stop plate, and Figure 4 is a hot air heater incorporating a device according to an embodiment of the present invention. FIG. 5 is a front view showing the body, and FIG. 5 is a sectional view taken along the line ■--■ in FIG. In Figure 1, the same symbols indicate the same parts, (5) is the combustor, (6) is the carburetor, (6A) is the mixing chamber, and (9) is the combustion plate. (9A) is the opening, (9B) is the 7-lunge part, (
9C) is the 7 flange passage, e is the flame opening of the annular holding plate,
(To) is the pilot frame, and (C) is the ignition device. Agent Makoto Kuzuno - I V = Ne 5 Figure

Claims (3)

[Claims] (1) A combustion plate made of a porous sintered body and combusting the mixed gas ejected from the pores on the surface is disposed in the opening 1 of the mixing chamber where fuel and combustion air are mixed. , A passage is formed in a part of this combustion plate through which combustion gas in an amount that can form a pilot plate is passed through, and a pilot flame forming flame port is formed at the outlet of this passage, and the flame is ejected from this flame hole. A combustion device characterized in that combustion gas is ignited, a pilot flame is formed in that part, and a mixed gas ejected from the entire combustion plate is ignited by a high-rot flame. (2) The combustion plate has a container shape with an opening on the side of the mixing chamber and a flange portion around the opening. The combustion device according to claim 1, wherein a passage through which a quantity of combustion gas capable of forming a pilot flame passes is formed in a part of a flange portion of the container-shaped combustion plate. . (3) The combustion device according to claim 2, wherein the combustion plate is conical.