JPH0616251Y2 - Combustion device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is directed to a vehicle equipped with an internal combustion engine or the like, a vehicle such as a trailer, a home room, a drying room, a room such as an office, which is indirect or direct. The present invention relates to a combustion device applicable to a heating device, a drying device, a boiler, a water heater, a greenhouse, and the like.

[Conventional technology]

Conventionally, for example, for heating the interior of a vehicle, the fuel is burned by a burner or a combustor separate from the internal combustion engine,
There is a heating system for an automobile that heats the interior of the room by the amount of heat generated. Regarding such a heating device for an automobile, examples of vaporization devices in a fuel supply device for a combustor include, for example, JP-A-61-160312 and JP-A-61-1603.
Some are disclosed in Japanese Patent No. 13, etc. The above-mentioned JP-A-61
The rapid heating combustor disclosed in Japanese Patent Publication No. 160312 will be described with reference to FIG.

As shown in FIG. 4, the rapid heating combustor 40 is obliquely arranged in a combustion cylinder 42 in which a vaporizer 46 is provided in an air duct 41. The vaporizer 46 is composed of a vaporization pipe 44 having a vaporization glow plug 47 disposed therein and having an ejection port 43 for ejecting fuel from an upper portion 45. Further, a large number of heat receiving fins 48 are formed on the outer peripheral surface of the vaporization pipe 44, and the heat receiving fins 48 are positioned obliquely with respect to the flow direction A of the air-fuel mixture of combustion gas, air and the like.

[Problems to be solved by the invention]

However, in the rapid heating combustor 40, since the large number of heat receiving fins 48 formed on the outer peripheral surface of the vaporization pipe 44 are positioned obliquely with respect to the flow direction A of the air-fuel mixture, the heat receiving fins 48 themselves. Becomes a resistance to the flow of the air-fuel mixture, which swirls the air-fuel mixture and hinders the flow of the air-fuel mixture, which deteriorates the combustion state and causes the vaporization efficiency of the carburetor 46 to decrease, and carbon is generated in the combustion cylinder 42. However, there is a problem in that it causes carbon to accumulate or causes carbon to accumulate.

An object of the present invention is to solve the above-mentioned problems, and in a combustion device in which fuel is vaporized at a high speed, and the vaporized fuel is mixed with combustion air and burned, the air intake pipe for combustion air is used. It is configured so that it can be smoothly introduced into the combustion cylinder from around the combustion cylinder in a resistance state,
In the combustion cylinder, the flow of gas with swirl is prevented from being blocked by the heat receiving fins of the vaporizer, and the heat receiving fins do not become a resistance, preventing the gas from flowing smoothly and hindering the combustion state, and improving the vaporization efficiency. The carbon is prevented from being generated or accumulated in the combustion cylinder, and the heat receiving area of the heat receiving fins is further increased to obtain sufficient vaporization heat from the combustion cylinder to improve the vaporization efficiency, It is an object of the present invention to provide a combustion device configured so that liquid fuel can be immediately vaporized in the vaporization device.

[Means for solving problems]

The present invention is configured as follows in order to achieve the above object. That is, the invention is a vaporizer including a combustion cylinder partitioned by a partition plate having openings in the vaporization chamber and the combustion chamber, a fuel injection hole opened in the vaporization chamber, and a vaporization pipe arranged in the combustion chamber. , And a large number of heat receiving members formed in an outer peripheral surface of the vaporization pipe in the combustion chamber, extending in a horizontal direction in the gas flow direction, and extending in the gas flow direction and having an elliptical shape having a major axis in the gas flow direction. And a fin for use in the combustion device.

Further, in this combustion apparatus, each heat receiving fin is provided with an uneven surface in the radial direction of the combustion cylinder.

[Action]

The combustion device according to the present invention is configured as described above and operates as follows. That is, in this combustion device, since the vaporization device is arranged in the combustion cylinder so that a large number of heat receiving fins are positioned horizontally with respect to the flow direction of the mixture gas, the mixture having a swirl in the combustion cylinder is It can flow smoothly without being hindered by the heat receiving fins formed on the outer peripheral surface of the vaporizer, improving vaporization efficiency, and carbon is generated in the combustion cylinder due to the heat receiving fins, or It does not cause carbon buildup.

In particular, the elliptical major axis of the heat receiving fins is arranged in the gas flow direction, and in some cases, since the heat receiving fins are formed on the uneven surface, the heat receiving area of the heat receiving fins can be increased, Therefore, the vaporizer can sufficiently take in vaporization heat of conduction heat and radiant heat from the inside of the combustion cylinder, can vaporize the liquid fuel immediately, and improve vaporization efficiency.

〔Example〕

An embodiment of the combustion device according to the present invention will be described below with reference to FIG.

FIG. 1 is a sectional view showing an embodiment of a combustion apparatus 10 according to the present invention. Regarding the combustion device 10, for example,
Air taken in through an air cleaner of a diesel engine or a gasoline engine, a single air cleaner, or the like, or air taken in directly from the outside or indoors is introduced from the air intake pipe 12, and the combustion gas of the combustion device 10 is introduced from the combustion gas delivery pipe 13. It is sent directly to a room or the like, or to a heat exchanger (not shown) installed downstream.

The combustion device 10 is made of, for example, a combustion cylinder 11 made of ceramics such as cordierite, silicon nitride, or silicon carbide, a metal outer cylinder 14 that covers the outer periphery thereof, and a metal that seals one end of the combustion cylinder 11 and the outer cylinder 14. It is composed of the lid plate 5 of
A combustion gas delivery pipe 13 made of metal is provided at the other end.

Further, the outer cylinder 14 has an air intake port 4, and a metal air intake pipe 12 is attached to the tubular portion where the air intake port 4 is formed. The air intake pipe 12 is attached in a radial direction of the outer cylinder 14, that is, perpendicular to the outer cylinder 14. In some cases, the air intake pipe may be tangentially attached to the outer cylinder 14.

The inside of the combustion cylinder 11 is partitioned into a vaporization chamber 7 and a combustion chamber 6 by a partition plate 8 having an air circulation opening 15 formed by a plurality of cutout passages and the like at the peripheral edge. Further, a large number of air communication holes 17 are formed in the downstream portion of the peripheral wall of the combustion cylinder 11 which constitutes the combustion chamber 6. Combustion cylinder 11 and outer cylinder 14
An annular air introduction path 27 is formed between the and, and the combustion air swirls therethrough.

Further, a combustion gas outlet 18 is formed in the end portion of the combustion chamber 6 on the side opposite to the vaporization chamber 7 so as to be radially offset. When the combustion gas outlet 18 is located in a state of being radially deviated from the axis of the combustion cylinder 11, the air-fuel mixture can be completely combusted and the combustion gas can be satisfactorily delivered to the heat exchanger.

The vaporizer 2 is installed so as to penetrate the combustion chamber 6 obliquely from the downstream corner of the combustion cylinder 11 toward the communication hole 19 formed in the central portion of the partition plate 8, and the fuel injection hole 23 of the vaporizer 2 is installed. It opens to 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 has a vaporization glow plug (not shown), which is a heating plug, built in a metal vaporization pipe 20. A terminal 21 for supplying a current to a resistance wire (not shown) such as tungsten embedded in a silicon nitride member of the vaporization glow plug is located at one end of the vaporization pipe 20.

At the other end of the vaporizing pipe 20, a jetting pipe 22 having a diameter smaller than that of the vaporizing pipe 20 is attached.
Has a fuel injection hole 23 formed at its tip. Further, the vaporization pipe 20 is provided with a fuel supply pipe 24.

Heat receiving fins 28 are formed on the outer peripheral surface of the vaporizing pipe 20. From the tip of the vaporization pipe 20 to the jet pipe 22
Are extended, the ejection pipe 22 penetrates the communication hole 19 formed in the partition plate 8, and the fuel injection hole 23 formed at the tip of the ejection pipe 22 is provided with an ignition glow installed in the vaporization chamber 7. It is located near the plug 3 and is open.

The combustion device 10 is characterized by, in particular, the following structure in the above structure. That is, in the combustion device 10, a large number of heat receiving fins 28 are formed on the outer peripheral surface of the vaporization pipe 20 of the vaporization device 2, and the heat receiving fins 28 are disposed in the combustion cylinder 11 so that the mixture of combustion gas and air, that is, the flow direction of the gas. The vaporizer 2 is attached to the combustion cylinder 1 so that it extends horizontally to
It is arranged in 1.

Further, as shown in FIG. 2, the vaporization pipe 2 of the vaporization device 2
The heat-receiving fins 28 formed on the outer peripheral surface of the No. 0 are each formed in an elliptical shape. In the combustion chamber 6 formed in the combustion cylinder 11, the elliptical major axis of the heat receiving fins 28 is arranged in the flow direction A of the air-fuel mixture, that is, the gas.

By forming the heat receiving fin 28 into an elliptical shape,
Since the heat receiving area of the heat receiving fins 28 can be increased in the flow direction of the air-fuel mixture, and the heat receiving fins 28 are arranged horizontally with respect to the gas flow direction, the heat receiving fins 28
Can minimize the gas flow resistance.

Further, as shown in FIG. 3, these heat receiving fins 28
The upper and lower outer surfaces of the heat-receiving fin 2 can be formed on the uneven surface 29.
The heat receiving area of No. 8 can be further increased.

The combustion device 10 is configured as described above and operates as follows. That is, the resistance wire of the vaporization glow plug in the vaporization pipe 20 is energized to heat the vaporization glow plug and the liquid fuel is supplied from the fuel supply pipe 24. The liquid fuel is vaporized, and the generated vaporized fuel passes through the space between the inner surface of the vaporization pipe 20 and the vaporization glow plug and the fuel injection hole 23 of the ejection pipe 22.
Is ejected from the vaporization chamber 7.

On the other hand, the combustion air is sent 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 passage 27, and a part of the air conduction hole 17 for accelerating the swirling flow. Is blown into the combustion chamber 6 from the
Is blown into the combustion chamber 6 through a large number of air communication holes 17 formed in the downstream portion of the.

The combustion air blown from the air intake pipe 12 through the air intake 4 into the annular air introduction passage 27 is partially swirled into the combustion chamber 6 through the air communication hole 17 while swirling in the annular air introduction passage 27. At the same time, most of the combustion air is blown into the downstream annular air introduction passage 27, and then the combustion air flows from the annular air introduction passage 27 into the air passage hole 17 formed in the downstream portion of the combustion tube 11. It is sent into the combustion chamber 6 through.

Therefore, the inside of the combustion cylinder 11, that is, the combustion chamber 6 is uniformly or nonuniformly distributed from the air communication hole 17 of the combustion cylinder 11 all around.
The combustion air sent to is blown into the combustion chamber 6 of the combustion cylinder 11 in an extremely ideal state. The introduced combustion air is ideally mixed with the vaporized fuel in the combustion cylinder 11 to generate a mixture, and a swirl flow, that is, a swirl is formed, and is further blown from the air conduction hole 17 for promoting the swirl. The combustion air can promote the swirling flow formed in the combustion cylinder 11.

Therefore, as fuel, combustion air is obtained and ignition glow plug 3 is used.
Is ignited, and the vaporized fuel and the combustion air are burned as a mixture. Then, the vaporized fuel is blown into the combustion chamber 6, and is made into a more homogeneous or inhomogeneous mixture with the combustion air in the combustion chamber 6, so that it is more completely and vigorously combusted. The vaporized fuel burns into combustion gas, which passes from the combustion gas outlet 18 having a round cross section formed at the downstream end of the combustion cylinder 11 through the combustion gas delivery pipe 13 to a heat exchanger (not shown) or the like. Sent out.

When the combustion state in the combustion chamber 6 becomes vigorous, the vaporization heat is received via the vaporization pipe 20 of the vaporization device 2 and the heat receiving fins 28 provided in the vaporization pipe 20. In this state, the power supply to the vaporization glow plug is stopped.

After that, the liquid fuel is vaporized by receiving the heat of combustion from the combustion chamber 6 through the heat receiving fins 28, in other words, the heat of vaporization of conduction and radiation, and becomes vaporized fuel to generate combustion air and air-fuel mixture. Continue burning. Moreover, the heat receiving fin 28 is
Since the heat receiving area is configured to be large as described above, sufficient conduction heat can be obtained from the inside of the combustion chamber 6, the function of rapidly vaporizing the liquid fuel is achieved, and vaporization according to active combustion is performed. Fuel can be produced. Furthermore,
Since the heat receiving fins 28 are arranged as described above,
The resistance to the flow of the mixture can be minimized.

[Effect of device]

The combustion device according to the present invention is configured as described above and has the following effects. In this combustion device, since the vaporizer is arranged in the combustion cylinder so that the heat receiving fins of the vaporizer extend horizontally in the gas flow direction, the air-fuel mixture having the swirl in the combustion cylinder vaporizes in the vaporizer. A large number of the heat receiving fins formed on the outer peripheral surface of the pipe can smoothly flow without being hindered, vaporization efficiency can be improved, and the resistance of the heat receiving fins causes carbon in the combustion cylinder. It does not cause or cause carbon accumulation.

In particular, since the elliptical major axis of the heat receiving fins is arranged in the flow direction of the air-fuel mixture, and the upper and lower outer surfaces of the heat receiving fins are formed as uneven surfaces, the heat receiving area of the heat receiving fins can be increased. Therefore, the vaporizer can sufficiently take in the conduction heat and the radiant heat of vaporization heat from the inside of the combustion cylinder, can immediately vaporize the liquid fuel, and further improve the vaporization efficiency.

Therefore, the vaporized fuel and the combustion air are mixed well in the combustion cylinder, the mixture is well generated, and the combustion gas is smoothly discharged from the combustion gas outlet.
The air-fuel mixture is completely combusted, so that the generation of carbon in the combustion cylinder can be prevented, or the generated carbon can be completely combusted without being accumulated therein.

Therefore, the liquid fuel obtains sufficient heat energy by the vaporizer and is immediately and rapidly vaporized into vaporized fuel, which is jetted into the vaporization chamber, and combustion air is introduced into the annular air around the combustion cylinder. Although it is smoothly introduced into the combustion cylinder from the passage in a low resistance state, the vaporized fuel and the combustion air are well mixed in the combustion chamber, and the air-fuel mixture is well generated. Since the vaporizer of FIG. 2 does not become a resistance and hinders the flow of gas, it can flow smoothly, and then the combustion gas is discharged from the combustion gas outlet having a round cross section, so that the air-fuel mixture is completely combusted, Combustion becomes more active as it is guided to the outside of the combustion cylinder.

Therefore, it is possible to prevent the generation of carbon in the combustion cylinder, or to completely burn the air-fuel mixture without accumulating the generated carbon therein. Therefore, according to this combustion device, it is possible to rapidly vaporize the liquid fuel, rapidly ignite the vaporized fuel, and burn it rapidly and surely, and thus contribute to heating the room or the like rapidly. It is possible.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a combustion device according to the present invention, FIG. 2 is a partially enlarged top view of the vaporizer of FIG. 1, and FIG.
1 is a partially enlarged side view of the vaporizer shown in FIG. 1, and FIG. 4 is a sectional view showing an example of a conventional combustor. 2 ... Vaporizer, 6 ... Combustion chamber, 7 ... Vaporization chamber, 8 ...
Partition plate, 10 ... Combustion device, 11 ... Combustion cylinder, 15 ...
Air circulation opening, 20 ... Vaporizing pipe, 23 ... Fuel injection hole, 28 ... Heat receiving fin, 29 ... Uneven surface.

Claims (2)

[Scope of utility model registration request] 1. A vaporizer comprising a combustion cylinder partitioned by a partition plate having openings in the vaporization chamber and the combustion chamber, a fuel injection hole opened in the vaporization chamber, and a vaporization pipe arranged in the combustion chamber,
And a large number of heat receiving members that are formed on the outer peripheral surface of the vaporization pipe in the combustion chamber and are horizontally spaced apart from each other in the gas flow direction to extend and have an elliptical shape having a major axis in the gas flow direction. A combustion device comprising: a fin. 2. The combustion apparatus according to claim 1, wherein each of the heat receiving fins has an uneven surface formed in the radial direction of the combustion cylinder.