JPH05655Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is an indirect or The present invention relates to a liquid fuel vaporization device that vaporizes liquid fuel to produce vaporized fuel, which can be applied to combustors used in direct heating devices, drying devices, boilers, water heaters, 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.

In addition, a heating system for an automobile that heats the room by the amount of heat generated by burning fuel in a combustor regardless of the internal combustion engine (for example,
(Refer to Publication No. 252018).

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 liquid fuel vaporization device, for example, Japanese Patent Application No. 137837/1983 (Japanese Patent Application Laid-open No. 1983-1989) filed by the present applicant,
(see Japanese Patent Application No. 665), Japanese Patent Application No. 1983-207330 (Japanese Patent Application No.
69009), Japanese Patent Application No. 59-281162 (see Japanese Patent Application Laid-Open No. 61-160312), etc.

First, what is described in Japanese Unexamined Patent Publication No. 62-665 will be summarized with reference to FIGS. 3 and 4. The liquid fuel vaporization device 40 has an outer pipe 47 and an inner pipe 48.
and a heating plug 45 such as a glow plug arranged in the inner tube 48. The outer tube 47 is provided with a plurality of nozzle holes 49 that open into the vaporization chamber, and a heat receiving body 41 is formed in a large-diameter closed end wall that projects into the combustion chamber. The heat receiving body 41 has grooves 44 as shown in FIG.
, and a large number of fins 43 are formed. The outer end of the inner tube 48 is threadedly supported on the outer end of the outer tube 47 via a heat insulating gasket 51. Inner tube 4
A fuel supply pipe 46 is connected to the outer end of 8, while
The inner end portion extends close to the heat receiving body 41 and the inner tube 4
A gap 50 is formed between the outer tube 8 and the outer tube 47. A base end portion of a heating plug 45 is screwed and supported in a threaded hole 42 provided at an outer end portion of an inner tube 48 , and a gap 50 exists between this distal end side heating portion and the inner tube 48 .
It is projected towards 1.

Further, the method described in Japanese Patent Application Laid-Open No. 62-69009 will be summarized with reference to FIG. In FIG. 5, a partition plate 52 having a plurality of notched passages 53 on the periphery of the inside of a combustion tube 59 allows a vaporization chamber 5 to be
4 and a combustion chamber 56 having an air introduction hole 55 in the peripheral wall, a nozzle 57 for ejecting vaporized fuel that opens into the vaporization chamber 54, and a fin 58 on the outer peripheral surface.
A combustor is disclosed that includes a fuel vaporization device 60 having a fuel vaporization device 60 having a fuel vaporization device 60 having a fuel vaporization device 60 having a fuel vaporization device 60 having a fuel vaporization device 60 having a fuel vaporization device 60 having a fuel vaporization device 60 having a fuel vaporization device 60 having a fuel vaporization device 60 having a fuel vaporization device 60 having a fuel vaporization device 60 having a fuel vaporization device 60 having a fuel vaporization device 60 having a fuel vaporization device 60 having a fuel vaporization device 60 having a fuel vaporization device 60; The fuel vaporizer 60 has a heating plug 61 such as a glow plug inserted into an outer tube 63, and a terminal 64 is provided at one end of the heating plug 61. The insertion of the heating plug 61 into the outer tube 63 is arranged such that a fuel passage 65 is formed. Further, a fuel supply pipe 62 is attached to the outer tube 63. The heating plug 61 has a solid structure, and has a resistance wire (not shown) made of tungsten embedded in a silicon nitride member.

Furthermore, what is described in Japanese Unexamined Patent Publication No. 160312/1982 will be summarized with reference to FIG. In FIG. 6, the inside of the combustion tube 71 is partitioned into a vaporization chamber 67 and a combustion chamber 68 by a honeycomb passage 69. An outer peripheral wall 66 having an air introduction hole is attached to the upstream end of the vaporization chamber 67. air duct 7
A combustor for rapid heating is disclosed in which a vaporizer 70 is provided in the combustion chamber 3 and is disposed diagonally within a combustion tube 71 and has a jet port 72 for jetting fuel from an upper portion 74. In the vaporizer 70, a heating plug 75 such as a glow plug is inserted into an outer tube 76 so as to form a fuel passage 77. A terminal 79 is provided at one end of the heating plug 75, and a fuel supply pipe 78 is attached to the outer tube 76.

[Problem that the invention attempts 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. Moreover, it takes a long time to vaporize the liquid fuel, which causes a delay in ignition and combustion of the vaporized fuel.

Furthermore, although the prior art liquid fuel vaporizer used in the above-mentioned combustor can reliably and rapidly vaporize liquid fuel to a certain extent, it is still not sufficient. It is not possible to adjust the temperature of the combustor appropriately depending on the condition of the combustor, which is unsatisfactory. Next, problems with the prior art will be explained.

First, let us start with the Japanese Patent Application Publication No.
Regarding the fuel vaporization device for a combustor described in Publication No. 62-665, after combustion becomes active, the heat receiving body 41 causes the fuel to flow from the end of the inner tube 48 of the fuel vaporization device into the outer tube 47. The fuel is heated and vaporized, and after the combustor starts operating, complete vaporization of the fuel is achieved even without energizing the heating plug, which helps reduce power consumption and improves fuel vaporization efficiency. However, the ignitability of the fuel is improved and a stable combustion state is obtained. is arranged, and the heat transfer area which is the heat radiation area of the heating plug 45 for the liquid fuel to obtain vaporization heat is small, so the liquid fuel vaporizes and cannot obtain sufficient vaporization heat. There is room for improvement in the flow of the vaporized fuel, and there are problems in that it is not necessarily sufficient to vaporize the liquid fuel rapidly and reliably and to eject the vaporized fuel from the nozzle holes 49.

Further, the fuel vaporizer 60 and vaporizer used in the combustor described in JP-A-62-69009 shown in FIG. 5 and JP-A-61-160312 shown in FIG. Similarly to the vaporizer shown in FIG. 2, the device 70 also includes a heating plug 61 and a heating plug 7.
Reference numeral 5 has only a solid structure, so that the liquid fuel vaporizes and cannot obtain sufficient heat of vaporization. There is a problem in that it is not necessarily sufficient to eject vaporized fuel from 72.

The purpose of this invention is to solve the above problems, and it is a liquid fuel vaporizer that vaporizes fuel at a rapid rate and is used in a combustor that burns the vaporized fuel. Therefore, a liquid fuel vaporization device is capable of rapidly and reliably vaporizing liquid fuel to generate vaporized fuel, and in particular, can prevent carbon from adhering to the vaporized fuel injection part, that is, the fuel passage on the inlet side of the vaporized fuel injection pipe. The goal is to provide the following.

[Means for solving problems]

In order to achieve the above object, this invention is constructed as follows. That is, this invention includes a cylinder body equipped with heat receiving fins on the outer peripheral surface, a heating plug inserted to form a fuel passage in the longitudinal direction of the cylinder body, and a vaporized fuel attached to the cylinder body communicating with the fuel passage. an ejection pipe, a fuel introduction pipe attached to the cylindrical body that communicates with the fuel passage, an inner cylinder that fits onto the outer circumferential surface of the heating plug only at the tip end on the side of the vaporized fuel ejection pipe, and an outer circumferential surface of the inner cylinder. The present invention relates to a liquid fuel vaporization device having a heat radiation fin extending in the longitudinal direction of the heating plug, which is provided only on the vaporized fuel injection pipe side of the fuel passage.

Further, this liquid fuel vaporization device is used by being placed in a combustion chamber of a combustor.

Further, in this liquid fuel vaporization device, the heating plug functions as a vaporization glow plug in the combustor.

[Action]

The liquid fuel vaporization device according to this invention is constructed as described above and operates as follows. That is, in this liquid fuel vaporization device, an inner cylinder having heat radiation fins is fitted to the outer circumferential surface of the tip of a heating plug, and the inner cylinder and the heating plug are connected to the cylinder body having heat receiving fins on the outer peripheral surface. Since it is inserted so as to form a passage, the heat from the heating plug, which is a glow plug, can be effectively radiated into the fuel passage, and the glow plug can be fitted into the tip of the heating plug, which is a spouting part of the fuel passage. The heat of the heating plug is dispersed through the heat radiation fins of the inner cylinder to maintain the temperature at a low temperature and radiate the heat. Therefore, carbon does not adhere to the vicinity of the ejection part.
Further, although a breathing phenomenon occurs upstream from the vicinity of the ejection part, that is, in the middle part of the heating plug, since the heat radiation fins are positioned, the vaporization of the liquid fuel is not hindered.

The liquid fuel is in direct contact with the heating plug in the middle part of the heating plug, and the liquid fuel is given sufficient heat of vaporization, so that the liquid fuel can be vaporized quickly and reliably. Liquid fuel can be efficiently vaporized.

Further, since the radiation fins formed on the outer peripheral surface of the inner cylinder extend in the longitudinal direction of the inner cylinder,
The vaporized fuel can smoothly flow through the fuel passage without being obstructed by the heat radiation fins, and is smoothly and quickly injected from the vaporized fuel injection pipe into the vaporization chamber of the combustor.

〔Example〕

An embodiment of the liquid fuel vaporization device according to this invention will be described below with reference to FIG.

In FIG. 1, a liquid fuel vaporizer according to the invention is indicated generally by the reference numeral 1. In FIG. In the liquid fuel vaporization device 1 according to this invention, for example, air is taken in through an air cleaner of a diesel engine or a gasoline engine, a separate air cleaner, etc., or air is taken in directly from outside or indoors through an air intake pipe, and then the air is combusted. It is used in a combustor that sends gas directly into a room or the like from a combustion gas delivery pipe or to a heat exchanger (not shown) installed downstream.

Regarding the structure of this liquid fuel vaporization device 1, the first
This will be explained with reference to the figures. The liquid fuel vaporization device 1 includes:
A heating plug 3, such as a glow plug for vaporization, is built into a metal vaporization pipe or cylindrical body 2. A large number of heat receiving fins 5 are formed on the outer peripheral surface of the cylinder 2. A vaporized fuel injection pipe 6 is attached to one end of the cylinder 2, and a liquid fuel introduction pipe 9 is attached to the other end of the cylinder 2. In addition, an inner cylinder 10 is provided on the outer circumferential surface of the tip portion of the heating plug 3.
are press-fitted, and the heating plug 3 and the inner cylinder 10 are in close contact with each other. The inner circumferential surface of the inner cylinder 10 has a complementary shape to the outer circumferential surface of the heating plug 3, and has a cylindrical shape, for example, a cylindrical shape.

Further, a large number of heat radiation fins 4 are formed on the outer peripheral surface of the inner cylinder 10. The heat dissipation fin 4 is the inner cylinder 10
extends in the longitudinal direction. A heating plug 3, which is a solid heater core or glow plug, and an inner cylinder 10 are inserted into the cylinder 2 so as to form a fuel passage 8. The heating plug 3 is made of, for example, ceramic, silicon nitride, etc., and has a resistance wire (not shown) made of tungsten embedded or printed on it. Further, a vaporized fuel injection portion 15 is formed at a downstream portion of the fuel passage 8 . Liquid fuel inlet 14 of liquid fuel inlet pipe 9
is open to the fuel passage 8. Also, heating plug 3
A terminal 11 is provided at the base end portion of. The ejection port 7 of the vaporized fuel ejection pipe 6 is normally installed and applied so as to open into the vaporization chamber of the combustor. In the figure, arrows indicate the direction of fuel flow.

FIG. 2 is a sectional view taken along the line - in FIG. 1. The heating plug 3 and the inner cylinder 10 are tightly press-fitted, and the heating plug 3 and the inner cylinder 10 are inserted into the center of the cylinder body 2 so as to form a fuel passage 8. Heat receiving fins 5 formed on the outer peripheral surface of the cylinder 2
are formed in the circumferential direction of the cylindrical body 2. Also,
The heat dissipation fins 4 formed on the outer peripheral surface of the inner cylinder 10 are
It is formed in the longitudinal direction of the inner cylinder 10.

Next, an example of a combustor to which the liquid fuel vaporizer 1 according to this invention is applied will be described. The combustor includes a ceramic combustion tube, a metal outer housing that covers the outer periphery of the ceramic combustion tube, and a metal lid plate that seals one end of the combustion tube and the outer housing. A metal combustion gas delivery pipe is provided at the lower end of the outer housing, and a metal air intake pipe is provided at the side of the cylindrical portion of the outer housing. The inside of the combustion tube is partitioned into two chambers, namely, a vaporization chamber and a combustion chamber, by a partition plate having a plurality of openings, or notch passages, in its peripheral edge.
A large number of air introduction holes are formed in the peripheral wall of the combustion cylinder constituting the combustion chamber. A combustion gas outlet is formed at an end of the combustion chamber opposite to the vaporization chamber.

The liquid fuel vaporization device 1 according to the present invention has, for example, as shown in FIG. 5 or FIG. It extends diagonally toward the hole and is installed to penetrate the communication hole. Further, an ignition glow plug, which is a heating plug, is installed in the vaporization chamber. A spout 7 formed at the tip of the vaporized fuel spout pipe 6
is installed near the ignition glow plug installed in the vaporization chamber.

The liquid fuel vaporizer 1 according to this invention is constructed as described above and operates as follows.

In order to more clearly understand the operation of the liquid fuel vaporizer 1 according to this invention, an example in which the liquid fuel vaporizer 1 is applied to the above-mentioned combustor will be described.

First, a resistance wire (not shown) of the heating plug 3, which is a glow plug for vaporization, inside the cylinder body 2 is energized from the terminal 11 to heat the heating plug 3, and liquid fuel is supplied from the fuel introduction pipe 9. The liquid fuel is introduced into the fuel passage 8 from the liquid fuel inlet 14 of the liquid fuel introduction pipe 9, and is vaporized by contact with the heated heating plug 3. Next, the vaporized fuel is ejected from the vaporized fuel injection part 15 through the vaporized fuel injection pipe 6 and from the injection port 7 into the vaporization chamber of the combustor.

An inner cylinder 10 equipped with heat radiation fins 4 is located at the tip of the heating plug 3, and the heat of the heating plug 3 is dispersed by the heat radiation fins 4, and the temperature is adjusted to an optimum temperature to perform the function of vaporizing the liquid fuel. , prevent the generation of carbon. Additionally, since a small amount of oil droplets may initially be ejected mixed with the vaporized fuel, these oil droplets have the function of making the ignition extremely smooth when the vaporized fuel is ignited.

On the other hand, combustion air is sent in from the air intake pipe, swirls in the annular space between the outer cylinder housing and the combustion cylinder, and is blown into the combustion chamber from the air introduction hole. A portion of the combustion air blown into the combustion chamber is sent into the vaporization chamber through a cutout passage that is an opening in the partition plate. The vaporized fuel and combustion air are mixed and homogeneously mixed to form a mixture, where the fuel is ignited by an ignition glow plug and combusted. Then, the vaporized fuel is ignited, combusted, and mixed with combustion air while being blown into the combustion chamber, where it is completely combusted. The combusted vaporized fuel becomes a combustion gas and is sent to a heat exchanger or the like from a combustion gas delivery port formed in the combustion tube through a combustion gas delivery pipe.

When the combustion state in the combustion chamber becomes active, combustion heat, that is, radiant heat is received via a large number of heat receiving fins 5 provided on the cylinder body 2 of the liquid fuel vaporizer 1. In this state, the supply of electricity to the resistance wire of the heating plug 3, which is the vaporizing glow plug of the liquid fuel vaporizing device 1, is stopped. After that, the liquid fuel vaporizer 1
receives radiant heat from the combustion chamber through the heat receiving fins 5, and the heat is transferred to the fuel passage 8 and radiated, and the liquid fuel is vaporized by the heat, that is, the heat of vaporization, and is generated into vaporized fuel. The vaporized fuel passes through the fuel passage 8 and is ejected from the vaporized fuel injection pipe 6 into the vaporization chamber.

Further, even if the combustion in the combustor becomes active, if it is desired to vaporize the liquid fuel rapidly, or if the liquid fuel is of a type that is difficult to vaporize, the heating plug 3 of the liquid fuel vaporizer 1 may be used. Of course, the operation may be continued without stopping the current supply to the resistance wire. Furthermore, even when the combustion state of the combustor is weak, the resistance wire of the heating plug 3 can be made energized to promote vaporization of the liquid fuel.

Although the embodiments of the liquid fuel vaporization device according to this invention have been described in detail above, the present invention is not necessarily limited to these details. For example, in the figure, the heat receiving fins formed on the outer circumferential surface of the cylinder are formed in the circumferential direction of the cylinder, but they do not necessarily need to be formed in the circumferential direction of the cylinder, and are formed in the longitudinal direction of the cylinder. Of course, the shape can be changed depending on the structure of the combustion chamber in which this liquid fuel vaporizer is installed. Furthermore, although the vaporized fuel injection pipe is formed in an F-shape, it can be formed in various shapes depending on the structure of the combustor. Although the fuel introduction pipe is installed almost perpendicularly to the cylinder, it is not necessarily limited to such a mounting structure, and may be installed in parallel or embedded in the cylinder. When the fuel vaporization device is attached to a combustor, it can be formed into various shapes depending on the structure of the combustor. Further, the shapes of the cylinder, inner cylinder, heating plug, and vaporized fuel injection pipe are not limited to those shown in the drawings, and may be formed into various shapes such as a rectangular cylinder, an elliptical cylinder, and a cylindrical shape. . Furthermore, although the end of the vaporized fuel injection pipe protrudes into the cylinder, for example, the end of the vaporized fuel injection pipe at the vaporized fuel injection part may be chamfered to make the flow of vaporized fuel smooth. Of course, it may be formed as follows.

[Effect of idea]

The liquid fuel vaporization device according to this invention is configured as described above, and has the following effects.
That is, in this liquid fuel vaporization device, an inner cylinder having heat radiation fins is fitted to the outer circumferential surface of the tip of a heating plug, and the inner cylinder and the heating plug are connected to the cylinder body having heat receiving fins on the outer peripheral surface. Insert so as to form a passage,
a vaporized fuel injection pipe is attached to one end of the cylinder;
In addition, since a fuel introduction pipe is attached to the other end of the cylinder, heat from the heating plug, which is a glow plug, can be effectively radiated to the fuel passage, and the tip of the heating plug, which is the spouting part of the fuel passage, can be effectively radiated to the fuel passage. The heat of the heating plug is dispersed through the heat radiating fins of the inner cylinder fitted into the inner cylinder, and the heat is radiated while maintaining the temperature at a low temperature.

Therefore, carbon does not adhere to the vicinity of the spouting part, and a breathing phenomenon occurs upstream from the vicinity of the spouting part, that is, in the middle part of the heating plug. However, since the radiation fins are positioned, the liquid fuel Nothing will occur that will hinder the vaporization of the

The liquid fuel is in direct contact with the heating plug in the middle part of the heating plug, and the liquid fuel is given sufficient heat of vaporization, so that the liquid fuel can be vaporized quickly and reliably. The liquid fuel can be efficiently vaporized, and the vaporized fuel can be smoothly ejected from the ejection port through the vaporized fuel ejection pipe. The vaporized fuel can then be immediately combusted and can be quickly used for heating or the like.

Further, since the radiation fins formed on the outer peripheral surface of the inner cylinder extend in the longitudinal direction of the inner cylinder,
The vaporized fuel can smoothly flow through the fuel passage without being obstructed by the heat radiation fins, and is smoothly and quickly injected from the vaporized fuel injection pipe into the vaporization chamber of the combustor.

Furthermore, the structure is extremely simple, the liquid fuel vaporization device itself can be easily assembled and attached to the combustor, and maintenance etc. are easy. In addition, regarding the fuel supply to the liquid fuel vaporizer, in order to sequentially generate only the amount of vaporized fuel necessary for combustion, the configuration is such that an optimum amount of liquid fuel is supplied to the liquid fuel vaporizer through the fuel introduction pipe. Moreover, since the liquid fuel is vaporized in the early stage of combustion, it can be controlled by the amount of liquid fuel supplied and the connection/disconnection of the heater coil, and it has various effects such as being extremely desirable from the standpoint of safety. It is.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing one embodiment of a liquid fuel vaporizer according to the present invention, and FIG. 2 is a cross-sectional view taken along line 1-1 of FIG.
FIG. 3 is a cross-sectional view showing an example of a fuel vaporizer used in a combustor according to the prior art;
Fig. 4 is a plan view showing the heat receiving body of Fig. 3, Fig. 5 is a cross-sectional view showing an example of a vaporizer used in a combustor according to the prior art, and Fig. 6 is a cross-sectional view showing an example of a vaporizer used in a combustor according to the prior art. 1... liquid fuel vaporizer, 2... cylinder, 3...
Heating valve, 4... heat dissipation fin, 5... heat receiving fin,
6: Vaporized fuel ejection pipe; 7: Ejection port; 8:
...fuel passage, 9...fuel inlet pipe, 10...inner cylinder, 14...fuel inlet, 15...fuel outlet.

Claims (1)

[Claims for Utility Model Registration] (1) A cylindrical body with heat receiving fins on its outer peripheral surface, a heating plug inserted to form a fuel passage in the longitudinal direction of the cylindrical body, and the cylindrical body communicating with the fuel passage. a vaporized fuel injection pipe attached to the heating plug, a fuel introduction pipe attached to the cylinder body communicating with the fuel passage, an inner cylinder fitted to the outer circumferential surface of the heating plug only at the tip end on the side of the vaporized fuel injection pipe, and the A liquid fuel vaporizer having a heat dissipation fin extending in the longitudinal direction of the heating plug, which is provided on the outer peripheral surface of the inner cylinder and only on the vaporized fuel injection pipe side of the fuel passage. (2) The liquid fuel vaporization device according to claim 1 of the utility model registration claim, which is used by being disposed in the combustion chamber of a combustor. (3) The liquid fuel vaporization device according to claim 2, wherein the heating plug functions as a vaporization glow plug in the combustor.