JPS61186712A - Vaporization type burner for heating apparatus operated by liquid fuel - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a vaporizing burner for a heating device (particularly a vehicle heating device or a vehicle installation heating device) operated with liquid fuel.

(Prior Art) A vaporizing burner of the type mentioned at the beginning, which has a water-absorbing member that protrudes into the combustion chamber of a heating device and is supplied with fuel via a fuel supply device, is known from West German Publication No. 3,233.321. It is publicly known. As is well known, this type of evaporative burner is sensitive to temperature and to air bubbles contained in the fuel supplied via the fuel supply device.

(Problems to be Solved by the Invention) Particularly in the case of this type of evaporative burner, coke accumulates on the absorbent member made of fleece, for example, during operation of the heating device, and over time, coke accumulates on the absorbent member. Since the amount of deposited Mi increases in the direction of fuel introduction, the life of the burner becomes shorter. That is, this deposited coke, which spreads in the direction of fuel introduction, gradually blocks the fuel supply and thus renders the heating device unusable.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a evaporative burner of the type mentioned at the outset, in order to eliminate the above-mentioned problems and to be less sensitive to temperature and air bubbles, as well as to have an improved performance and a longer service life. The aim is to improve the

(Means for Solving the Problems) Therefore, in the vaporizing burner according to the present invention, the absorbent member includes a first vaporizing portion for easily volatile fuel components;
and a second vaporization section for fuel components that are difficult to volatilize. In this case, the fuel supply device is connected to the first vaporization section, the second vaporization section facing the burner of the heating device and separated from the first vaporization section by a fuel-impermeable material. .

(Function) The operating mode of the vaporizing burner 15 according to the present invention will be explained below. The fuel supplied via the fuel supply device 11 enters the active first vaporization section 23 via a duct 13. Easily volatile components of the supplied fuel are vaporized in the first vaporization section 23 . A portion of the supplied fuel containing components that are difficult to volatilize is transferred to the fuel impermeable member 30 of the first vaporization section 23.
and flows along the member to the passive second vaporization section 24, where the components that are difficult to volatilize are vaporized. Second
The fuel impermeable member 29 of the vaporization section 24 stops corrosion of the second vaporization section 24, thus simultaneously
The vaporized portion 24 is protected.

As is clear from FIG.
Insert it and fix it. The two vaporizing parts 23, 24 of the vaporizing burner 15, together with the burner part 14 which serves as the lid 21 and which includes the fuel supply device 11, thus form a unit which can be replaced as a whole quickly and easily if necessary. Since the support member 25 is fixed to the combustion tube 8, it serves at the same time as a stop and a guide when inserting a new unit.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the accompanying drawings, in which examples are shown.

In FIG. 1, a heating device operated on liquid fuel is generally indicated by l. In this case, heated air is drawn in from the inlet 3 at the end 4 of the heating device 1 by means of a hot air fan 2 . The hot air fan 2 is driven by an electric motor 5 which also drives a combustion air supply bypass fan 6. The bypass fan 6 sucks air from the inlet lower part and sends the air through the slit 10 to the combustion chamber 9 consisting of the combustion tube 8. The fuel is supplied to a vaporization burner generally indicated at 15 via a fuel supply device 11 consisting of a fuel supply stud 12 and a duct 13 of a burner member 14, where it is vaporized and mixed with the combustion air supplied in the combustion chamber 9. be done. The mixture thus obtained is ignited by the ignition device 16 (for example a scorching plug) when the heating device 1 is started. Flame monitor 1 for flame monitoring
7 protrudes into the combustion chamber 9. High-temperature combustion gas generated in the combustion chamber 9 during combustion is transferred from the combustion chamber 9 to a heat exchanger 18.
Heat is applied to the heated air introduced by the hot air fan 2 through the heat exchanger 18. The thus heated air exits from the right end 19 of the heating device 1. The combustion gas is
After passing through the heat exchanger 18, it leaves the heating device l via the exhaust gas outlet 20.

As is clear from FIG. 1.2, the evaporative burner 15 is supported by a burner member 14, which at the same time forms a removable part 1i21. The lid may be made of, for example, Bakelite. In this case, the fuel supply stud 12 is inserted into the lid 21 and the duct 13 configured in the lid 21
is connected to the absorbent member 22 of the vaporizing burner 15.

Absorbent member 22 includes a first vaporization portion 23 for volatile fuel components. A duct 13 of a fuel supply device is connected to this first vaporization section. The absorbent member 22 further includes a second vaporization portion 24 for less volatile fuel components. This second vaporized portion is located in the combustion chamber 9 of the absorbent member 22.
It is provided at the end facing towards.

The absorbent member 22 is shown as a member 25 supporting the absorbent member 22 within the jfl tube 8.

As shown in FIG. 2, it is preferably made of a ceramic material and surrounds the first vaporization section 23. A fuel impermeable member generally indicated at 26 is provided. This fuel-impermeable element 26 has a flange-like radial extension 27 forming a rear wall 28 of the second vaporization section 24 on the side of the second vaporization section 24 facing away from the combustion chamber 9 . This flange-like extension 27 forms a fuel-impermeable member 29 for the second vaporization part 24 .

The fuel impermeable member 30 associated with the first vaporization section 23 is
It surrounds the first vaporization part 23 and is configured as a hollow cylinder in the form of a pipe piece 32 .

In the embodiment of FIG. 2, both fuel-impermeable members 29,
30 form one unit.

In FIG. 2, the fuel-impermeable member 29 of the second vaporizing section 24 is constructed in the form of a disk, and the independent fuel-impermeable member 30 of the first vaporizing section 23 is constructed from a pipe section 32. A modified example fixed to a member is shown by a broken line.

As shown in FIG. 1, the diameter of the first vaporization section 23 is smaller than the diameter of the second vaporization section 24, and the first vaporization section 23 is arranged with respect to the center plane (indicated by a chain line) of the combustion chamber 9. It is placed eccentrically. Furthermore, the axial length of the first vaporized portion 23 is greater than the length of the second vaporized portion 24. That is, since the first vaporizing portion 23 has a large volume and a small cross section, the first vaporizing portion 23 can be used extremely effectively for vaporizing easily volatile fuel components. The large absorption volume of the first vaporization section 23 reduces air bubble sensitivity. The second vaporization part 24 is a passive part compared to the first vaporization part 23, and its cross section facing the combustion chamber 9 of the heating device l is large.

Although corrosion and unavoidable coke formation occur in this second vaporization section 24, the corrosion and coke formation described above do not spread to the first vaporization section 23. Because the first
This is because the vaporization section 23 is surrounded by a fuel-impermeable member 30, ie it is well isolated from the passive second vaporization section.

In the case of the embodiment shown in FIG. 3, unlike in FIG.
Back wall 28 consisting of fuel-impermeable member 29 of vaporization section 24
There is no intermediate space between and the opposite wall of the lid 21; instead, a fuel-impermeable member, generally designated 26a in FIG. 3, extends to said wall 33 of the lid 21. The fuel-impermeable member 26a is fixed to the wall 33, for example with adhesive, and is connected to both vaporizing parts 23.2 of the vaporizing burner 15.
I support 4. As is clear from FIGS. 1 to 3, both vaporized parts 23, 24 of the absorbent member 22 can be composed of fleece layers, which can be matched to each other depending on the circumstances and requirements regarding properties. I can do it. The number of fleece layers and/or the thickness of each fleece layer in each vaporization section 23, 24 can be selected arbitrarily.

When actually using the vaporizing burner 15 according to the present invention,
The diameter of the first vaporized portion 23 is approximately 1/of the diameter of the second vaporized portion 24.
It was found that setting 2 would be appropriate.

Further, the axial length of the second vaporized portion 24 is approximately 1/4 of the axial length of the first vaporized portion 23.

In FIG. 4, as a modification of FIG. 3, the lid 21 is
An alternative embodiment has been shown forming part of a single member 26a comprising both fuel impermeable members integral with the vaporizing section 23,24.

The fuel supply star 12' is guided along the rear side of the lid 21 and is preferably fixed to the shingle by gluing and/or form-fitting. The bent fuel supply stud mouth 36 is connected to the axial bore 35 of the fuel impermeable member 26b.
The bore 35 communicates with the absorbent member 22 as in the previous embodiment.

In the present invention, "fuel impermeable" means that the material is essentially unsuitable for fuel, i.e. it absorbs very little fuel, but the active and passive vaporization parts are separated. For practical and cost reasons, compromises are possible.

The embodiments of the present invention have been described above, and these embodiments will be further explained together with their effects.

The diameter of the first vaporized portion is smaller than the diameter of the second vaporized portion,
The axial length of the first vaporizing section is greater than the axial length of the second vaporizing section, and the first vaporizing section is arranged eccentrically with respect to the central plane of the burner. This type of preferred embodiment of the vaporizing burner according to the invention has a small cross-sectional area and a large volume, which makes it very effective in vaporizing volatile components, and furthermore, the large absorption volume reduces the sensitivity to bubbles. A first vaporized portion is obtained. The active second evaporation part guarantees its function even if it is corroded, since it has a large surface facing the combustion chamber of the heating device. Preferably, the diameter of the first vaporization section is about 1/2 of the diameter of the second vaporization section, and the axial length of the second vaporization section is about 1/4 of the axial length of the first vaporization section.

In order to prevent fuel components that are difficult to volatilize from dripping from the outer peripheral surface of the first vaporization part, and to separate the first and second vaporization parts at the end of the absorbent member facing the combustion chamber,
A fuel-impermeable member, preferably of hollow cylindrical design and in the form of a pipe section, surrounds the first vaporization section. A fuel portion that contains a fuel component that is difficult to volatilize and is not vaporized in the first vaporization portion is transferred to the second vaporization portion via the inner wall of the fuel impermeable member facing the first vaporization portion, and is absorbed in the second vaporization portion, Then, it is vaporized in the second portion.

Furthermore, it is expedient to provide, on the side of the second vaporization section remote from the combustion chamber, a fuel-impermeable element which forms a rear wall of the second vaporization section on the side remote from the combustion chamber.

This fuel-impermeable part as a back wall of the second vaporization part is
Corrosion of the second vaporization section is stopped so that coke formation and corrosion are localized to the second vaporization section.

Both fuel-impermeable parts can be made from the same material (eg, a ceramic material) and can be made integral for ease of manufacture.

According to another preferred embodiment of the invention, the first vaporizing section is fixed in or on the burner member (e.g. M closing the combustion chamber) comprising the fuel supply device, and the second vaporizing section is fixed to the first vaporizing section. Support on the vaporization part. In this case, the burner member to which the first vaporizer part is fixed and the second vaporizer part can be separated from each other in the axial direction, or the fuel-impermeable member forming the back wall of the second vaporizer part is attached to the burner member. In the case of this type of configuration, which extends axially without spacing to the parts, the burner parts, including both evaporation parts and the fuel supply, form one unit that can be handled together, for example, for rapid conversion of the entire burner. form.

In order to make the surface of the second vaporization part as large as possible,
The vaporization part has an outer diameter that is slightly smaller than the diameter of the combustion chamber to the extent that it can be introduced into the combustion chamber without problems.

Both vaporized parts of the absorbent member preferably consist of fleece layers, which can be matched to each other depending on the circumstances and requirements regarding their properties.

According to another advantageous embodiment of the invention, both fuel-impermeable materials are constructed integrally with the lid and are preferably made of a ceramic material. This simplifies the fabrication and installation of the evaporative burner since no assembly work is required.

In order to make the ceramic material of the lid as thin as possible and to avoid machining of the ceramic parts as much as possible, the fuel supply stud is guided along the outer wall of the lid and fixed thereto, for example by gluing. The lid is provided with a bore for connecting to the first vaporizing section and for inserting the mouth end of the fuel supply stud.

(Effects of the Invention) According to the present invention, the first vaporization section for easily volatile fuel components is the active section of the vaporization burner, while the second vaporization section for less volatile fuel components is the active part of the vaporization burner. , is the passive part of an evaporative burner. Reliable ignition can be ensured if the first vaporization part, i.e. the active vaporization part, is arranged at least partially behind a scorching plug as a scorching device, in which case the heat applied from the combustion chamber to the active part consisting of the first vaporization part The load can be reduced and the lifespan can be extended. As fuel components that are difficult to volatilize are vaporized in the second vaporization part, corrosion phenomena and coke formation occur on the surface of this active part of the water-absorbing member.
The function of the active first vaporization part is not disturbed. By dividing the water-absorbing member according to the invention into two parts as described above, the temperature sensitivity and bubble sensitivity of this type of evaporative burner are significantly reduced. In the present invention, since the fuel supply device is connected to the active first evaporation part, damage and blockage of the fuel inlet area are effectively prevented and the functionality of the evaporative burner is therefore maintained over a long period of time.

Corrosion and coke formation are prevented from spreading into the active vaporization section by the fuel-impermeable material, so the passive secondary
Localized in the vaporized area.

[Brief explanation of the drawing]

FIG. 1 is a schematic vertical sectional view of a heating device equipped with a vaporizing burner according to the present invention, and FIG. 2 is a diagram showing a burner section including a fuel supply device of a vaporizing burner according to the present invention and both vaporizing sections. 3 is a view similar to FIG. 2 of another embodiment of the vaporizing burner, and FIG. 4 is a sectional view of yet another embodiment. l... Heating device, 9... Combustion chamber, 11... Fuel supply device, 15... Evaporative burner, 22... Absorbent member, 23... First vaporizing portion, 24... -Second vaporization part.

Claims (20)

[Claims] (1) In a heating device having an absorbent member that protrudes into the combustion chamber and receives fuel supply via a fuel supply device, the absorbent member 22 is a volatilization member connected to the fuel supply device 11. First vaporization section 2 for easy fuel components
3 and a second vaporization section 24 for less volatile fuel components provided at the end of the member 22 facing the combustion chamber 9, both vaporization sections 23, 24 being essentially impermeable to fuel. A vaporizing burner of a heating device operated with liquid fuel, characterized in that the burners are separated from each other. (2) The vaporizing burner for a heating device operated with liquid fuel according to claim 1, wherein the diameter of the first vaporizing portion 23 is smaller than the diameter of the second vaporizing portion 24. (3) The first vaporization section 23 is operated with the liquid fuel according to claim 1 or 2, characterized in that the first vaporization section 23 is arranged eccentrically with respect to the central plane of the combustion chamber 9. Evaporative burner for heating equipment. (4) The liquid according to one of claims 1 to 3, characterized in that the length in the axial direction of the first vaporization portion 23 is designed to be larger than the length of the second vaporization portion 24. Evaporative burner for heating equipment that runs on fuel. (5) The second aspect of the present invention is characterized in that the diameter of the first vaporized portion 23 is approximately 1/2 of the diameter of the second vaporized portion 24.
A vaporizing burner for a heating device operated with liquid fuel according to one of items 1 to 4. (6) Operation with liquid fuel according to claim 4, characterized in that the axial length of the second vaporizing portion 24 is approximately 1/4 of the axial length of the first vaporizing portion 23. Evaporative burner for heating equipment. (7) The first and second vaporization portions 23, so as not to allow fuel to pass through;
Heating according to one of the claims 1 to 6, characterized in that the first vaporization section 23 is surrounded by a fuel-impermeable member 30 in order to separate the first vaporization section 24. Equipment vaporizer burner. (8) A member 29 that does not permeate fuel is provided on the opposite side of the second vaporization portion 24 from the combustion chamber 9. A vaporizing burner for a heating system that runs on liquid fuel. (9) Both members 29, 30, 26 that do not allow fuel to pass through;
9. A vaporizing burner for a heating device operated with liquid fuel according to claims 7 and 8, characterized in that 26a is integrally constructed. (10) The first vaporizing portion 23 is fixed to the inside or surface of the burner portion 14, 21 including the fuel supply device 11. A vaporizing burner for a heating system that runs on liquid fuel. (11) The liquid fuel according to any one of claims 1 to 10, characterized in that the second vaporization section 24 and the burner section 14 including the fuel supply device 11 are separated from each other in the axial direction. Evaporative burner of heating equipment operated by. (12) Claims 1 to 11, characterized in that the diameter of the second vaporizing portion 24 is slightly smaller than the diameter of the combustion chamber.
A vaporizing burner of a heating device operated with liquid fuel according to one of the clauses. (13) the first and second vaporizing parts 23, 24 are coupled to the burner parts 14, 21 including the fuel supply device 11;
13. Evaporative burner for a heating device operated on liquid fuel according to claim 1, characterized in that the burner forms a unit that can be handled together. (14) Claim 7 or 9, characterized in that the fuel-impermeable member 30 surrounding the first vaporizing portion 23 is constructed in the form of a hollow cylinder in the form of a pipe piece 32. Evaporative burner for heating equipment operated on liquid fuel. (15) Member 29 that does not allow fuel to pass through the second vaporization portion 24
is configured in a disk shape and forms a back wall 28 on the side opposite to the combustion chamber 9. Equipment vaporizer burner. (16) Claim 7, characterized in that the fuel-impermeable members 26, 26a are made of a ceramic material.
A vaporizing burner for a heating device operated with liquid fuel according to one of the items 1 to 9. (17) A vaporizing burner for a heating device operated with liquid fuel according to any one of claims 1 to 16, wherein the vaporizing portions 23 and 24 are made of a fleece layer. (18) Both members 29, 30, 26 that do not allow fuel to pass through
, 26a form one unit together with the lid 21,
18. A vaporizing burner for a heating device operated with liquid fuel according to one of claims 1 to 17, characterized in that the burner is integrally constructed. (19) A vaporizing burner for a heating device operated with liquid fuel according to claim 18, wherein the fuel supply stud 12' of the fuel supply device 11 is fixed to the back surface of the lid 21. . (20) The fuel supply stud 12' is connected to the first vaporization portion 23
20. A vaporizing burner for a heating device operated with liquid fuel according to claim 19, characterized in that the burner extends through the unit up to the water absorbing member 22.