JPH0532644B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is applicable to vehicles equipped with an internal combustion engine, etc., vehicles such as trailers, indoor rooms, drying rooms, offices, etc. It relates to a combustor that can be applied to heating equipment, drying equipment, boilers, water heaters, greenhouses, etc.

[Conventional technology]

Conventionally, for example, to heat the interior of a vehicle, cooling water from the internal combustion engine is taken out through hot water piping, guided to a heater device, where heat is exchanged indirectly, and warm air is sent into the vehicle to heat the interior of the vehicle. There is something.

Furthermore, there is a heating device for a vehicle (see, for example, Japanese Patent Application Laid-Open No. 60-252018) that heats the room by the amount of heat generated by burning fuel in a burner, ie, a combustor, regardless of the internal combustion engine.

Furthermore, an engine warm-up device (for example, an engine warm-up device designed to supply combustion gas from the combustor to the intake port of the engine via a heat exchanger and to guide air heated by the heat exchanger to the passenger compartment) 61-79864).

As a prior art, for example, there is a combustor disclosed in Japanese Patent Application No. 60-207330 (Japanese Unexamined Patent Publication No. 62-69009) filed by the present applicant.

The combustor disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 62-69009 will be summarized with reference to FIG. The combustor has a plurality of notched passages 53 on the periphery inside the combustion tube 51.
A fuel vaporizer partitioned into a vaporizing chamber 54 and a combustion chamber 56 having an air introduction hole 55 in the peripheral wall by a partition plate 52 having a partition plate 52, having a vaporized fuel injection nozzle 57 opening into the vaporizing chamber 54, and having fins 58 on the outer circumferential surface. Equipped with equipment. In the figure, 59 indicates a lid plate.

[Problem that the invention seeks to solve]

However, for indoor heating using the cooling water of the internal combustion engine, the temperature of the cooling water rises slowly, so it takes a long time for the heater body to send out hot air, and during that time the heater There is almost no heating function. In addition, for automotive heating systems or engine warm-up systems that use a combustor independent of the internal combustion engine, combustion cycles, exhaust gas processing, etc. require time and effort, and complex mechanisms and control devices are required. There are problems such as:

Furthermore, the combustor disclosed in JP-A No. 62-69009 cannot be said to be sufficiently effective at introducing combustion air into the combustion cylinder, and after introduction, The mixing state of combustion air and vaporized fuel cannot be said to be satisfactory for producing a preferable air-fuel mixture.

The purpose of this invention is to solve the above-mentioned problems, and is a combustor that vaporizes fuel at a rapid rate, mixes the vaporized fuel with combustion air, and burns the mixture.
Combustion air is introduced from the air intake pipe, and is configured so that it can be easily introduced from the periphery of the combustion cylinder into the combustion cylinder in a uniform flow state in a smooth and low resistance state, and the combustion air is also introduced into the vaporization chamber. To provide a combustor which ignites vaporized fuel very well by introducing a portion of the fuel, and further ideally mixes vaporized fuel and combustion air in a vaporization chamber to generate an air-fuel mixture and promote combustion. It is.

[Means for solving problems]

In order to achieve the above object, the present invention is configured as follows. That is, the present invention provides a combustion tube having a large number of air introduction holes, a partition plate having an opening that divides the inside of the combustion tube into a combustion chamber and a vaporization chamber and communicates between the two chambers, and a partition plate provided in the combustion chamber. A vaporization device in which a vaporization pipe is arranged and a fuel injection port is opened in the vaporization chamber, an outer cylinder equipped with an air intake port forming an annular air introduction passage around the outer periphery of the combustion cylinder, and an air cylinder attached at right angles to the outer cylinder. an air guide member comprising an intake pipe and a large number of air guide holes provided in the annular air introduction path upstream of the air introduction hole between the air intake port and the air introduction hole and guiding combustion air; The present invention relates to a combustor having a combustor.

Further, in this combustor, the air guide holes provided in the air guide member are formed at substantially equal distances.

Further, in this combustor, an ignition glow plug is provided in the vaporization chamber, and the vaporization device has the vaporization glow plug.

[Effect]

The combustor according to the present invention is constructed as described above and operates as follows. That is, in this combustor, an outer cylinder that forms an annular air introduction passage is arranged around the outer periphery of a combustion cylinder that is equipped with an air introduction hole that forms a vaporization chamber and a combustion chamber, and a fuel injection port arranged inside the combustion cylinder is arranged. A large number of air guide holes are provided in the annular air introduction path upstream of the air introduction hole and guide combustion air, the fuel injection port being opened into the vaporization chamber by penetrating the combustion chamber with the vaporization device provided therein. Since an air guide member is provided, the liquid fuel is immediately and rapidly vaporized into vaporized fuel by the vaporization device, and the fuel is injected into the vaporization chamber, and the combustion air flows around the combustion tube. The air can easily enter the combustion cylinder from the annular air introduction path through the air guide hole in a state of low resistance, and a part of the combustion air can also be introduced into the vaporization chamber to improve the vaporization of the fuel. Moreover, it can be ignited reliably.

Furthermore, the vaporized fuel and the combustion air can be mixed well in the vaporization chamber, a good air-fuel mixture can be generated, and combustion can be promoted;
Moreover, the combustion gas can be sent out from the combustion chamber with great force.

In particular, an air intake pipe is attached to the air intake port of the outer cylinder, and the air guide member is an annular air guide plate with a large number of air guide holes, so that the combustion air taken in from the air intake port Air is evenly or uniformly distributed in the annular air introduction passage, guided through each of the air guide holes, and then uniformly fed into the air introduction holes from around the entire periphery of the combustion tube, resulting in combustion under ideal conditions. It is introduced indoors.

〔Example〕

Hereinafter, one embodiment of a combustor according to the present invention will be described with reference to FIG.

In FIG. 1, a combustor according to the invention is indicated generally by the reference numeral 1. In FIG. This combustor 1
For example, air taken in through the air cleaner of a diesel engine or gasoline engine, a separate air cleaner, etc., or air taken directly from outside or indoors is introduced through the air intake pipe 12 (see Fig. 2), and the air is introduced into the combustor. 1
The combustion gas is sent directly into the room from the combustion gas delivery pipe 13, or sent to a heat exchanger (not shown) installed downstream. When sending to the heat exchanger installed downstream,
Of course, the heat exchanger may be installed in series downstream of the combustor 1, or may be installed on the outer periphery of the combustor 1.

The combustor 1 includes a combustion tube 11 made of ceramic, an outer tube 14 made of metal that covers the outer periphery of the combustion tube 11, and a combustion tube 11 made of metal.
and a metal lid plate 5 that seals one end of the outer cylinder 14.
It consists of A metal combustion gas delivery pipe 13 is provided at the other end of the outer cylinder 14 .
Further, the outer cylinder 14 has an air intake port 4, and a metal air intake pipe 12 is attached to the cylindrical portion in which the air intake port 4 is formed. The air intake pipe 12 is attached in the radial direction of the outer cylinder 14, that is, perpendicularly to the outer cylinder 14.

The interior of the combustion tube 11 is partitioned into two chambers, namely the vaporization chamber 7 and the combustion chamber 6, by a partition plate 8 having a plurality of notched passages 15, which are openings, at the peripheral edge. Furthermore, a large number of air introduction holes 17 are formed in the downstream portion of the peripheral wall of the combustion cylinder 11 that constitutes the combustion chamber 6 .

An annular air introduction passage 27 is formed between the combustion tube 11 and the outer cylinder 14, through which combustion air swirls, and an air guide member is installed in the annular air introduction passage 27. This air guide member is an annular air guide plate 1 provided with a large number of air guide holes 9.
0, the combustion air introduced from the air intake pipe 12 is uniformly dispersed, and the combustion air is uniformly introduced into the annular air introduction passage 27 located next.

Further, a combustion gas outlet 18 is formed at the end of the combustion chamber 6 on the opposite side from the vaporization chamber 7 . The vaporizer 2 is installed diagonally through the combustion chamber 6 from the downstream corner of the combustion chamber 11 toward an opening or communication hole 19 formed in the center of the partition plate 8. A spout 23 opens into the vaporization chamber 7. Further, an ignition glow plug 3 which is a heating plug is installed in the vaporization chamber 7.

The vaporizer 2 includes a vaporizing glow plug, which is a heating plug, built into a metal vaporizing pipe 20. A terminal 21 is located at one end of the vaporizing pipe 20, for supplying current to a resistance wire made of tungsten embedded in the silicon nitride member of the vaporizing glow plug. vaporizing pipe 2
A jetting pipe 22 having a smaller diameter than the vaporizing pipe 20 is attached to the other end of the jetting pipe 22.
A spout 23 is formed at the tip.

Further, the vaporization pipe 20 includes a fuel supply pipe 24.
is provided. Furthermore, heat receiving fins 28 are formed on the outer peripheral surface of the vaporizing pipe 20. A jetting pipe 22 extends from the tip of the vaporizing pipe 20, and the jetting pipe 22 passes through a communication hole 19 formed in the partition plate 8. The spout 23 is the vaporization chamber 7
It is located near the ignition glow plug 3 installed in the ignition glow plug 3 and is open.

Regarding the combustor 1, the combustion tube 11 constituting the vaporization chamber 7 and the combustion chamber 6 is made of a dense or porous ceramic member with a low coefficient of thermal expansion. For example, the ceramic member can be made of cordierite, which has a porous structure and has a small coefficient of thermal expansion. The lid plate 5 of the vaporization chamber 7 may be provided with a dense or porous ceramic member having a low coefficient of thermal expansion.

The combustor according to the present invention is constructed as described above and operates as follows.

The resistance wire of the vaporizing glow plug in the vaporizing pipe 20 is energized to heat it, and the fuel supply pipe 2
Liquid fuel is supplied from 4. The liquid fuel is vaporized, and the vaporized fuel is ejected from the ejection port 23 of the ejection pipe 22 into the vaporization chamber 7 through the space between the vaporization pipe 20 and the vaporization glow plug. On the other hand, combustion air is fed from the air intake pipe 12, passes through the annular space between the outer cylinder 14 and the combustion cylinder 11, that is, the annular air introduction path 27, and is blown into the combustion chamber 6 from the air introduction hole 17.

Further, an annular air guide plate 10 is installed in the annular air introduction passage 27 downstream of the air intake port 4 of the outer cylinder 14 and in the middle of the annular air introduction passage 27. Holes 9 are formed at approximately equal distances. Therefore, the annular air introduction path 2 is passed from the air intake pipe 12 through the air intake port 4.
The combustion air blown into the annular air introduction passage 27 is uniformly blown into the annular air introduction passage 27 downstream from the air guide hole 9 formed in the annular air guide plate 10 while swirling within the annular air introduction passage 27 .

Next, the combustion air is passed from the annular air introduction passage 27 to the air introduction hole 1 formed downstream of the combustion tube 11.
7 into the combustion chamber 6. Therefore,
Since the combustion air is evenly and uniformly fed into the combustion tube 11, that is, into the combustion chamber 6 from the entire circumference of the combustion tube 11, the combustion air flows into the combustion tube 1 in an extremely ideal state.
1 and is ideally mixed with vaporized fuel to form an air-fuel mixture. Furthermore, a portion of the combustion air blown into the combustion chamber 6 is sent into the vaporization chamber 7 through the cutout passage or opening 15 in the partition plate 8 . Then, the fuel obtains combustion air, and the vaporized fuel and combustion air form a mixture, which is ignited by the ignition glow plug 3 and combusts.

Next, the vaporized fuel is blown into the combustion chamber 6, where it is made into a homogeneous mixture with the combustion air, and is combusted more completely and vigorously.
The vaporized fuel burns and becomes combustion gas, and the combustion tube 1
Combustion gas outlet 1 formed at the downstream end of 1
8, the combustion gas is sent out through the combustion gas delivery pipe 13 to a heat exchanger or the like.

When the combustion state in the combustion chamber 6 becomes active, heat of vaporization is received through the vaporization pipe 20 of the vaporization device 2 and the heat receiving fins 28 provided on the vaporization pipe 20. In this state, the energization to the vaporizing glow plug is stopped. After that, the liquid fuel is transferred to the combustion chamber 6.
It receives combustion heat, that is, heat of vaporization, and vaporizes into vaporized fuel, and the vaporized fuel and combustion air form a mixture and continue combustion.

In this combustion action, the liquid fuel is heated and vaporized by the vaporizing glow plug, and the vaporized fuel is released into the jet nozzle 2.
However, at this time, if the liquid fuel is incompletely vaporized or if oil droplets are mixed with the vaporized fuel and are ejected from the ejection port 23, the lid plate 5 and the combustion tube 11
The liquid may collide with other objects, become fuel liquid, travel through the lid plate 5 and the partition plate 8, and flow down to the bottom. In that case, if you take measures such as attaching a ceramic member or the like to the cover plate 5 to insulate it, cooling by the outside air will be prevented, and the vaporized fuel and oil droplet fuel that collided will be in a state where heat is taken away. This can prevent the vaporized fuel from becoming liquefied.

As described above, the embodiments of the combustor according to the present invention have been described in detail; however, the present invention is not necessarily limited to these details. It may be configured to have a vertical shape installed in the vertical direction, or it may be installed in an oblique direction, and of course this can be changed depending on the conditions such as the installation location.

In the figure, the air guide holes provided in the annular air guide plate are circular and formed at equal intervals, but they are not limited to circular holes, and may have various shapes such as oval holes, elongated holes, square holes, etc. It is needless to say that the holes need not be formed at equal distances, but can be changed in various ways depending on the air inflow speed, air inflow amount, etc., and a large number of fine holes may also be formed.

Further, the shape, size, etc. of the air introduction hole shaped into the combustion tube can be similarly changed. Regarding the partition plate that partitions the inside of the combustion cylinder, instead of providing openings that are a plurality of notched passages on the peripheral edge, the partition plate may be configured to have openings consisting of a plurality of through holes at appropriate parts of the partition plate. Of course, the openings may be formed either as a cutout passage or as a through hole.

In addition, a dense or porous ceramic member with a low coefficient of thermal expansion may be installed on the lid plate, and in the figure, the air intake pipe and vaporizer are separated from each other by approximately 90 degrees (approximately 270 degrees from the opposite direction). However, it is needless to say that the positional relationship is not limited to this.

〔Effect of the invention〕

The combustor according to the present invention is configured as described above and has the following effects. In this combustor, an outer cylinder is arranged around the outer periphery of a combustion cylinder equipped with an air introduction hole that forms a vaporization chamber and a combustion chamber to form an annular air introduction passage, and a vaporization device is passed through the combustion chamber of the combustion cylinder. The fuel injection port of the vaporizer is opened in the vaporization chamber, and an air guide member having an air guide hole is installed in the annular air introduction path between the outer cylinder and the combustion cylinder. The liquid fuel is immediately and rapidly vaporized into vaporized fuel by the vaporization device and is injected into the vaporization chamber, and the combustion air is smoothly and at a low rate from the annular space around the combustion tube into the combustion tube. It is easy to enter the combustion air in a resistive state, and by introducing a part of the combustion air into the vaporization chamber, the vaporized fuel can be ignited very well.

Furthermore, the vaporized fuel and combustion air can be mixed well in the vaporization chamber, a good air-fuel mixture can be generated, and combustion can be promoted;
Moreover, the combustion gas can be vigorously sent out from the combustion chamber to a predetermined location, such as a heat exchanger.

Further, an air intake port is formed in the outer cylinder, and since the air guide member is an annular air guide plate having a large number of air guide holes, the combustion air taken in through the air intake port is formed in an annular shape. Evenly or uniformly distributed in the air introduction passage, guided by each of the air guide holes, and then uniformly fed into the air introduction holes from the entire periphery of the combustion cylinder,
It is introduced into the combustion chamber in ideal conditions.

In addition, since a vaporizer having a vaporizing glow plug is disposed in the combustion tube, at the beginning of combustion, the liquid fuel is rapidly and reliably vaporized by the vaporizing glow plug into vaporized fuel. After combustion becomes active, even if the vaporizing glow plug is turned off, combustion heat is obtained from the combustion chamber and vaporized fuel is immediately generated.Furthermore, an ignition glow plug is installed in the vaporizing chamber. Because of this arrangement, the vaporized fuel is ignited steadily and ignition errors do not occur.

Therefore, according to this combustor, liquid fuel can be rapidly vaporized, and the vaporized fuel can be rapidly ignited and combusted rapidly and reliably, so that it can rapidly contribute to heating, etc. It is something.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of a combustor according to the present invention, FIG. 2 is a sectional view taken along the line - in FIG. 1, and FIG. 3 is a sectional view showing an example of a combustor according to the prior art. be. 1... Combustor, 2... Vaporizer, 3... Ignition glow plug, 4... Air intake, 6... Combustion chamber, 7... Vaporization chamber, 8... Partition plate, 9... Air guide hole, 10... annular air guide plate, 11... combustion tube, 12... air intake pipe, 14... outer cylinder,
15... Opening, 17... Air introduction hole, 20... Vaporization pipe, 27... Annular air introduction path.

Claims (1)

[Scope of Claims] 1. A combustion cylinder having a large number of air introduction holes, a partition plate having an opening that divides the inside of the combustion cylinder into a combustion chamber and a vaporization chamber and communicates between the two chambers, and a partition plate having an opening for communicating between the two chambers. a vaporizing device in which a vaporizing pipe is arranged and a fuel injection port is opened in the vaporizing chamber; an outer cylinder equipped with an air intake port forming an annular air introduction path on the outer periphery of the combustion cylinder; and a vaporizer installed at right angles to the outer cylinder. an air guide member comprising an air intake pipe and a large number of air guide holes provided in the annular air introduction path upstream of the air introduction hole between the air intake port and the air introduction hole and guiding combustion air; , a combustor having. 2. The combustor according to claim 1, wherein the air guide holes provided in the air guide member are formed at substantially equal distances. 3. The combustor according to claim 1, wherein the vaporization chamber is provided with an ignition glow plug, and the vaporization device has the vaporization glow plug.