JP2002013709A - Liquid fuel combustion device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid fuel combustion device which performs excellent vaporization. SOLUTION: A wick 29 consists of a pleat 302 made of a cloth-like fibers having good thermal conductivity and formed into a shape of a rod with a hollow of ϕd1 diameter being left at the center thereof and the pleat portion being left radial so as to have a property of ventilation of evaporated gas and permeability of liquid oil, while the pleat 302 is rendered to have the number of peaks ranging from 22 to 30. The wick 29 is allowed to be sufficiently in contact with the inner wall of an evaporation chamber by its outer peripheral portion having a diameter of ϕD. Further, the ratio di/D of ϕD and ϕd1 is rendered to range from 20 to 65%. Thus heat supplied from heat sources outside the evaporator, i.e., an evaporator heater 48 and a heat receiving fin 45, is transferred to the central portion of the evaporation chamber through the linear portion of the radial pleat portion, i.e. through the shortest path, of the wick 29. As a result, kerosene is actively evaporated even at the central portion of the evaporation chamber and generation of tar can be effectively suppressed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vaporized Bunsen-type combustion device for injecting vaporized liquid fuel from a nozzle to burn it.

[0002]

2. Description of the Related Art A conventional liquid fuel combustion apparatus of this type will be described with reference to FIGS. 8 illustrates the general structure of a liquid fuel combustion apparatus applied to the present invention as well as the conventional example, and FIG.
This is for explaining the conventional structure of the inner carburetor.

In FIG. 8, reference numeral 1 denotes a main body case;
Reference numeral 3 denotes an oil receiving tank arranged at the bottom of the case 1, and 3 denotes a cartridge tank for supplying fuel to the oil receiving tank 2, which is detachably mounted on the upper part of the oil receiving tank 2.

[0004] Reference numeral 4 denotes a pump for pumping fuel from the oil receiving tank 2, reference numeral 5 denotes a vaporizer for heating and vaporizing the fuel supplied from the pump 4, and reference numeral 6 denotes a fuel pipe connecting the vaporizer 5 and the pump 4. It is.

[0005] Reference numeral 7 denotes a burner section for burning the fuel gas vaporized by the carburetor 5, 8 a combustion cylinder covering the burner section 7, 9 a combustion gas outlet of the combustion cylinder 8, 10 a blower fan, and 11 a blower fan. It is a discharge port for discharging hot air generated by mixing high-temperature combustion gas discharged from the combustion gas discharge port 9 and air blown from the blower fan 10.

Next, in FIG. 9, reference numeral 12 denotes a vaporizer which is made by appropriately cutting a forged brass material and has a burner portion 7 mounted on the upper portion thereof. Reference numeral 13 denotes a vaporizer for fuel supplied from the pump 4. Vaporization chambers 14 are wicks for promoting vaporization installed in the vaporization chamber 13. The wicks are made of metal nets having good thermal conductivity, metal flocs, porous metal bodies, and the like.
It is made of porous ceramics.

Reference numeral 15 denotes a burner seat formed in an annular shape on the upper portion of the vaporizer 12 and the upper surface of the annular shape is formed flat, and 16 is mounted and mounted on the upper surface of the burner seat 15. A mixing tube 17 having a cylindrical shape and open at the upper and lower ends, and 17 is a burner cylinder having a closed-end cylindrical cup shape attached to the burner seat 15 so as to cover the mixing tube 16. The mixing tube 16 and the burner tube 17
A flange is formed at the lower end skirt portion of the base member, and these flanges are vertically stacked as shown in the figure, and are appropriately attached to the burner seat 15 by screws or the like (not shown in detail).

Reference numeral 18 denotes a nozzle for injecting the vaporized gas generated in the vaporizing chamber 13 upward. Although not shown in detail, the vaporizing chamber 13 communicates with the nozzle 18 through a communication passage.

Reference numeral 19 denotes a heater groove provided along the lower surface side of the burner seat 15 and the side surface side of the vaporizer 12, reference numerals 20 and 21 denote inner and outer caulking allowances of the heater groove 19, and reference numeral 22 denotes the heater groove. This is a vaporizer heater of a sheathed heater fitted into the groove 19 and caulked by caulking allowances 20 and 21.

Numeral 23 denotes a flame hole formed in the lower skirt of the burner cylinder 17. Numeral 24 denotes a vaporizer 1 for recovering combustion heat from the flame generated in the flame hole 23 and transmitting it to the vaporizer 12.
The arc-shaped heat receiving fins 25 provided integrally with the flame 2 are flame holding covers provided to stabilize the combustion flame generated in the flame holes 23 without causing a lift or the like.

Reference numeral 26 denotes a primary air inlet provided inside the burner seat 15 in a region outside the nozzle 18, through which primary air sucked by an ejector action generated when the fuel gas is ejected from the nozzle 18. It becomes a passage that does.

In the conventional liquid fuel combustion apparatus configured as described above, the carburetor 12 is
After the gas reaches the vaporization temperature of kerosene, when the vaporized fuel gas is ejected from the nozzle 18, the primary air is sucked from the primary air inlet 26 by the ejector action of the ejected gas, and the fuel gas and the primary air are mixed in the mixing pipe 16. After being mixed in the burner cylinder 17, the mixture proceeds through the passage space sandwiched between the mixing pipe 16 and the burner cylinder 17, and becomes a combustible mixture from the flame hole 23.
It is exhaled outside. Then, it is ignited appropriately and becomes a combustion flame.

After the combustion flame is formed, the heat receiving fins 2
The power supply to the carburetor heater 22 is cut off because the temperature of the carburetor 12 can be kept at the vaporization temperature of kerosene without the help of the carburetor heater 22 because the 4 is exposed to the combustion flame. In addition, the flame holding cover 25 for correcting the direction of the combustion flame to prevent the lift is also exposed to the combustion flame, and transmits the received heat to the vaporizer 12, so that the vaporizer 12 is more sufficiently. After the start of combustion, the kerosene can be continuously vaporized by itself without requiring the help of the vaporizer heater 22 in the entire combustion region.

[0014]

However, in the above-mentioned conventional apparatus, the heat source for heating the kerosene in the vaporizing chamber 13 to the vaporizing temperature, that is, both the vaporizer heater 22 and the heat receiving fins 24, Since it is provided outside the vaporizer 12, it has been found that the heat supplied from the heat source portion is not sufficiently transmitted to the central portion of the wick 14.

That is, the wick 14 is a metal net wound object,
Although formed of a metal floc, porous metal, porous ceramics, etc., the heat flow path from the outer peripheral portion of the wick 14 to the central portion thereof is not always linear, and the wick 14 is complicated. 14 could not be efficiently heated.

[0016] For this reason, it is easy for the non-vaporized kerosene to remain in a liquid state at the center of the wick 14. Therefore, when the kerosene vaporized on the outer peripheral portion of the wick 14 passes through the center portion of the wick 14 on the way to the nozzle 18, it is cooled again and liquefied, and tarified to form the wick 14 or the nozzle 18.
There was a problem that clogged.

The present invention solves the above-mentioned problems, so that the heat of the heat source mounted on the outside of the vaporizer 12 is efficiently transmitted to the center of the wick 14, so that a stable combustion operation can be performed for a long period of time. That's what I did.

[0018]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has a vaporizer, a hollow cylindrical vaporization chamber formed in the vaporizer, and a longitudinal section of the vaporization chamber. A nozzle provided at the end of the vaporizer at one end of the direction,
A burner portion, a cap attached to the other end of the vaporizer, a liquid fuel supply pipe connected to the cap, a heat receiving fin provided at a portion of the vaporizer near the nozzle to collect combustion heat, and a parallel portion. And a U-turn portion, and the U-turn portion is attached to the nozzle side and the parallel portion is attached along each side of the carburetor, and the heat generation density of the parallel portion is larger than that of the U-turn portion. The folded portion formed of a cloth-like fibrous material having good heat conductivity and breathability and oil permeability has a hollow portion having a diameter of φd1 at the center portion and each folded portion has a radial shape. And a wick for promoting vaporization which is set so that the ratio d1 / D of its outer diameter φD to the diameter φd1 of the hollow portion is in the range of 20 to 65%. did.

Further, the liquid fuel combustion apparatus is characterized in that the number of folds of the folds of the wick is set in the range of 22 to 30.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention is constructed as described above, and comprises a folded portion formed of a cloth-like fibrous material having good heat conductivity, air permeability and oil permeability, and a center portion thereof. The wick is formed by leaving a hollow part and forming a wick into a rod shape so that each fold is radial, and by setting the outer periphery of the wick in sufficient contact with the inner wall surface of the vaporization chamber, vaporization is performed. The heat supplied from the outside of the vessel, that is, the vaporizer heater and the heat receiving fins, is transmitted to the center in the shortest path through the wick, that is, the straight section of the radial folds, and kerosene is also active in the center of the vaporization chamber In addition to being vaporized, stagnation of the vaporized gas and liquid kerosene is prevented by the ventilation and oil passing action, and wick clogging is less likely to occur. In addition, the cap that closes one end in the longitudinal direction of the vaporization chamber is a drawn product made of a material having relatively low thermal conductivity, and a kerosene supply pipe is connected to the part where the temperature is kept relatively low. Kerosene is less likely to be tarred at the outlet. Furthermore, heat receiving fins are provided near the nozzle of the vaporizer so that the heat extracted from the combustion flame is supplied to the nozzle portion that should be kept at the highest temperature without waste. The vaporizer was heated without the help of. And, for the vaporizer heater, the U-turn part is attached to the nozzle side, and the parallel parts are attached along both sides of the vaporizer,
Inexpensive U-shaped heaters can be used without any special shape change,
By making it larger than that of the turn section, the consumed power is effectively used for vaporizing kerosene.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

In these figures, reference numeral 27 denotes a vaporizer,
Reference numeral 8 denotes a vaporization chamber, and reference numeral 29 denotes a wick of a vaporization promoting material attached in the vaporization chamber 27.

FIGS. 5 to 7 show the shape of the wick 29 in detail.

In FIG. 5, reference numeral 301 denotes a woven fabric formed by weaving, for example, a copper fiber having a relatively good thermal conductivity into a cloth shape. In FIG. It is a folded fold that has been folded. Then, as shown in FIG. 7, the diameter is φ at the center.
The wick 29 whose outer diameter is φD is formed by being rounded into a rod shape (cylindrical shape) so that the hollow portion of d1 is left and each fold portion is radial. Where wick 29
Is the ratio d1 / D of the outer diameter φD to the diameter φd1 of the hollow portion is 2
The number is set to be in the range of 0 to 65%, and the number of folds of the folds 302 is set to be in the range of 22 to 30.

Reference numeral 31 in FIG. 7 is a hollow portion formed at the center.

Reference numeral 32 denotes a wick 2 at one end of the vaporizer 27.
9 is a cap that closes the insertion port side and is made of stainless steel with relatively poor thermal conductivity. It is drawn in two steps as shown in the figure, so that the amount of heat transferred to the small-diameter drawn part can be minimized. It is devised to be suppressed.

Reference numeral 33 denotes a kerosene supply pipe for supplying liquid kerosene into the vaporization chamber 28, which is connected to the small-diameter throttle portion of the cap 32 described above.

Numeral 34 denotes a nozzle for ejecting the vaporized gas of kerosene vaporized in the vaporization chamber 28 upward.

Reference numeral 35 denotes a burner base made of a flat metal plate. The above-described vaporizer 27 is attached to the back surface (lower surface), and the burner portion to be described below is attached to the upper surface.

Numeral 36 denotes the burner portion, the structure of which is the same as that of the conventional example, and the mixing tube 37 and the burner cylinder 3 covering the outside thereof.
8, both of which are mounted in such a manner that the lower skirt is kept airtight by press-fitting all around, so that no gas leaks from the press-fitted portion. Further, the flanges of the hem portions are vertically overlapped and attached to the burner base 35.

Numeral 39 denotes a burner mounting portion which is formed to project upward in a circular trapezoidal shape around the nozzle 34 of the carburetor 27, and is formed in such a size that the lower end portion of the burner portion 36 is coaxially and smoothly fitted. This serves as a positioning guide when the burner portion 36 is attached.

Numeral 40 designates a nozzle through hole formed in the center of the burner mounting portion 39. The nozzle 34 of the vaporizer 27 faces the nozzle through hole to receive the injection of the vaporized gas into the burner portion 36. 27 for burner base 35
It serves as a guide when it is attached to the back of the device.

Reference numeral 41 denotes a burner seat for seating the overlapping portion of the mixing tube 37 and the flange of the burner cylinder 38 at the lower annular portion on the outer peripheral side of the burner mounting portion 39.

Reference numeral 42 denotes a flame hole which is formed on the lower flange side of the burner cylinder 38 so that the lower edge faces the press-fitting portion of the mixing pipe 37 and the burner cylinder 38.
A heat-resistant metal net is appropriately provided outside the flame hole 42 to stably form a combustion flame and to burner portion 36.
It prevents foreign substances from entering the interior.

Reference numeral 43 denotes a primary air inlet formed outside the nozzle through hole 40 of the burner mounting portion 39, and a plurality of primary air inlets are provided at equal intervals on the same radius as viewed from the nozzle 34 as shown in FIG. This is a portion where the primary air flows in while the vaporized gas is ejected from 34 to generate the ejector action.

Reference numeral 44 denotes a spot welding between the burner cylinder 38 and the mixing pipe 37 in which the conical depressed upper end ceiling is concentrically overlapped with a similar ceiling of the burner cylinder 38 and spot-welded. The rectifying and equalizing cylinder, which is gradually fitted toward the inner wall of the burner cylinder 38 above the position of the flame hole 42 so as to be fitted and fitted, while gradually expanding toward the bottom.

Numeral 45 denotes heat receiving fins formed in the upper part of the vaporizer 27 at positions outside the burner seat 41 when viewed from the nozzle 34 side and penetrating through the burner base 35 and projecting in a dorsal fin shape. The heat receiving fins 31 penetrate through the burner base 27 so as to recover a part of the combustion heat by being exposed to the combustion flame.

Reference numeral 47 denotes a flame holding cover which is provided over the entire outer periphery of the heat receiving fins 45 outside the burner seat 41 to promote the stable formation of the combustion flame. The fin 45 is penetrated, and the lower end is attached to a flange of the skirt of the burner 36. Although the through holes through which the heat receiving fins 45 pass are not described in detail here, the through holes are of the same size as those formed in the burner base 35.

Numeral 48 denotes a sheath heater-type vaporizer heater for heating the vaporizer 27, which is bent in a U-turn shape as shown in the figure and whose parallel portions are attached along both sides of the vaporizer 27. Since it is clear that the U-turn portion on the nozzle 34 side does not significantly contribute to the heating of the vaporizer 27, the U-turn portion is formed so that the calorific value of that portion is moderate.

Numerals 49 and 50 are upper-closed heater grooves for fitting parallel portions of the vaporizer heater 48 on both sides of the vaporizer 27.

Reference numerals 51 and 52 denote the heater grooves 49 and 50, respectively.
It is the crimping margin of the lower opening edge of. Vaporizer heater 48
Is firmly fixed to the vaporizer 27 through the caulking of the caulking allowances 51 and 52 after being fitted into the heater grooves 49 and 50.

.. Are burner bases 35.
These are mounting screws for mounting the vaporizer 27 on the lower surface (rear surface) and the burner portion 36 and the flame holding cover 47 on the upper surface (front surface). In this embodiment, these mounting screws 53,
When the bolts 53,... Are tightened, the vaporizer 27 and the burner portion 36 are firmly attached to the burner base 35, but the flame holding cover 47 is connected to the lower end flange of the burner portion 36. The flame holding cover 47 is attached with a play left therebetween to allow a certain degree of thermal deformation of the flame holding cover 47.

FIG. 4 is a cross-sectional view of the vaporizer 27 and the vaporizer heater 48, wherein 54 is a parallel portion of the vaporizer heater 48, 55 is a U-turn portion, and 57 is embedded in the vaporizer heater 48. As shown in the figure, the resistance heating wires are densely arranged so that the heat generation density of the parallel portion 54 is relatively large, and conversely, the resistance heating wires of the U-turn portion 55 are relatively small. It is installed in. Thereby, the consumed power is used as efficiently as possible for heating the vaporizer.

The embodiment of the present invention is configured as described above, and its operation will be described below.

When the operation for starting operation is performed, the control circuit (not shown) starts energizing the carburetor heater 48.

Then, the parallel portion 5 of the vaporizer heater 48
Since the calorific values of 4 and 54 are larger than those of the U-turn section 55, the consumed power efficiently heats both sides of the vaporizer 27 and quickly raises the vaporizer 27 to the vaporization temperature of kerosene.

According to the present invention, the wick 29 installed in the vaporization chamber 28 has a folded fold 302 made of a woven cloth made of copper fiber having excellent thermal conductivity, and has a diameter φd1 at the center.
Is formed in a rod shape (cylindrical shape) so that the hollow portions 31 are left and each fold portion is radial, and the outer diameter of the rod-shaped body is φD so as to appropriately contact the inner wall of the vaporization chamber.
The ratio d1 / D of φD and φd1 is set in the range of 20 to 65%, and the number of folds of the folded part 302 is set in the range of 22 to 30. As a result, the heat supplied from the vaporizer heater 48 is linearly transmitted to the center of the wick 29 through the folds of the wick 29, and heats not only the outer peripheral portion of the wick but also the kerosene at the center very efficiently. . Therefore, vaporization is also vigorously performed in the central portion, and even if the vaporized material in the outer peripheral portion of the wick passes through the central portion of the wick while heading to the nozzle 34, it is not cooled, and normal combustion is performed. Nozzle 34 at a gas temperature sufficient to
It became possible to inject from.

Further, since the wick 29 is a woven body of copper fiber having not only gas vapor permeability but also liquid kerosene permeability, that is, oil permeability, the vaporization promoting performance is further improved. In addition, stagnation of vaporized gas and liquid kerosene can be effectively suppressed, and tarification of kerosene can be suppressed. As a result, an excellent vaporizer in which tar clogging of the wick 29 is unlikely to occur can be realized.

Further, since the cap 32 for closing the wick insertion opening of the vaporization chamber 28 has a throttle structure made of stainless steel having poor heat conductivity, the cap 32 can be easily attached to the vaporizer 27. The temperature gradient between the vaporizer main body and this cap can be made relatively large, and the tarification of kerosene at the discharge port of the kerosene supply pipe 33 connected thereto can be suppressed very effectively. Was.

Further, the parallel portion 54 of the vaporizer heater 48
8, the object of heating is only the kerosene vaporizing portion of the vaporizer 27, and does not include the burner seat as in the case of the conventional example of FIG. The temperature is very effectively consumed to reach the vaporization temperature of kerosene, and the temperature of the vaporization section quickly reaches the vaporization temperature of kerosene.

When the temperature of the vaporizer 27 reaches a predetermined value, the control circuit operates the pump 4 and a solenoid (not shown) for opening and closing the nozzle 34, and the vaporized gas is supplied from the nozzle 34 into the mixing pipe 37 of the burner 36. Spray toward. At the same time, an ignition device (not shown) is operated.

When the vaporized gas is ejected from the nozzle 34 toward the mixing pipe 37, an ejector action is generated to start the suction of the primary air through the primary air suction port 43, and the mixing pipe 37 is started.
In the mixing with the primary air is started. Mixing tube 3
Even after passing through 7, further mixing proceeds while flowing down the flow passage space formed so that the area gradually increases by the wall of the mixing pipe 37 and the rectifying / equalizing cylinder 44, and heads toward the flame hole. Then, a uniform mixed gas is discharged from the flame hole 42 to the outside of the burner cylinder 38. When the discharged gas mixture is ignited by the above-described ignition device, the combustion operation is started.

In addition, between the burner cylinder 38 and the mixing pipe 37, the ceiling at the upper end which is depressed in a conical shape is the burner cylinder 38.
While being overlapped concentrically on a similar ceiling of
There is provided a straightening / equalizing cylinder in which the lower end is fitted to the inner wall of the burner cylinder 38 above the position of the flame hole while gradually spreading downward, and the direction of the flow after being ejected from the mixing pipe 37 is changed. The greatly changed air-fuel mixture smoothly goes to the flame hole 42 without stagnation in the middle of the flow path, so that the flame hole 42 has a stable flame of any size and shape and is promptly fire-extinguished. Combustion is completed and odor generation is reduced as much as possible. In addition, attachment of the flow straightening / equalizing cylinder 44 to the burner cylinder 38 can be performed extremely simply by simply overlapping the conical depressions on the upper ceilings of the two.

The mixing tube 37 and the burner cylinder 38 are
Since the lower end portion is tightly joined by press fitting, the flame hole 42
The air-fuel mixture to be ejected from the air does not leak from gaps other than the flame holes 42.

Further, the burner cylinder 38 and the mixing pipe 37 are connected by press-fitting, and the lower end of the press-fitted connecting portion is mounted so as to be fitted into the burner mounting portion 39, and the flange portion of the hem is overlapped. Since it is screwed to the burner seat 41 around the burner mounting portion 39, high-precision coaxiality between the mixing pipe 37 and the burner cylinder 38 can be easily realized, and it can be maintained for a long time without any deviation. Therefore, a uniform amount of air-fuel mixture is always supplied to any of the flame holes 42, and stable and excellent combustion is performed.

Then, after a lapse of time, when the heating of the vaporizer 27 becomes possible only by the amount of heat obtained from the heat receiving fins 45, the control circuit cuts off the power supply to the vaporizer heater 48,
The combustion operation is continued without consuming the heater drive power.

In the above description of the embodiment, an example in which a woven fabric made by regularly weaving copper fibers is used as the material of the wick is described. However, the wick is required to have good thermal conductivity, air permeability for vaporized gas and liquid kerosene, so it is not limited to a woven fabric, but a non-woven fabric. Needless to say, the shape of the shape may be acceptable.

[0058]

As described above, according to the present invention, the wick installed in the vaporizing chamber leaves a folded fold of a woven fabric having good thermal conductivity, leaving a hollow portion having a diameter of φd1 at the center, In addition, the ratio d1 / D of φD and φd1 is 20 to 65 so that the folds are radially formed in a rod shape so that the outer diameter of the rod-shaped body contacts the inner wall of the vaporization chamber sufficiently well.
%, And the number of peaks in the folded body is in the range of 22 to 30, so that the heat supplied from the heat source outside the vaporizer, that is, the vaporizer heater and the heat receiving fins, is reduced by the wick. The kerosene can be actively vaporized even in the central part of the vaporization chamber because it is transmitted to the central part in the shortest path through the straight part of the radial fold part.

Further, since the wick is a woven body of copper fiber having a gas-permeable gas permeability and a liquid kerosene-permeable property, the vaporization accelerating performance is further improved.
It has become possible to effectively suppress kerosene tarification, and naturally, it is possible to realize an excellent vaporizer that is less likely to cause wick clogging due to the tar.

Further, the cap for closing one end of the vaporization chamber is made into a drawn product, and the kerosene supply pipe is connected to the cap which is lower than the temperature of the vaporizer, so that the kerosene can be tared at the supply pipe discharge port. It can be effectively suppressed.

Further, a heat receiving fin is provided at a position near the nozzle of the vaporizer, so that the combustion heat extracted from the combustion flame can be supplied to the nozzle portion to be maintained at the highest temperature without waste.

As for the carburetor heater, the U-turn portion is arranged on the nozzle side and the parallel portions are arranged on both sides of the carburetor, so that an inexpensive U-shaped electric heater can be used without any special shape change. By making it possible to use it and making the heat generation density of the parallel part larger than that of the U-turn part, the consumed power can be used effectively for the vaporization of kerosene.

At the same time, the time required for the vaporizer to reach the vaporization temperature of kerosene was significantly reduced.

[Brief description of the drawings]

FIG. 1 is a front sectional view of one embodiment of the present invention.

FIG. 2 is a side sectional view of one embodiment of the present invention.

FIG. 3 is a partial cross-sectional top view of one embodiment of the present invention.

FIG. 4 is a bottom sectional view of one embodiment of the present invention.

FIG. 5 is a partially omitted plan view of a wick material (woven fabric).

FIG. 6 is a perspective view illustrating a wick material (folded body).

FIG. 7 is a perspective view of one embodiment of a wick.

FIG. 8 is a sectional view of a liquid fuel combustion type heating apparatus for explaining not only the present invention but also a conventional example.

FIG. 9 is a sectional view of a conventional example.

[Explanation of symbols]

27: vaporizer, 28: vaporization chamber, 29: wick, 30
1: Woven cloth, 302: folded body, 31: hollow part, 3
2: cap, 33: kerosene supply pipe, 34: nozzle, 3
6: Burner part, 45: Heat receiving fin, 48: Vaporizer heater, 49: Heater groove, 54: Parallel part, 55: U-turn part.

Claims (2)

[Claims] 1. A vaporizer (27) and the vaporizer (27)
A hollow cylindrical vaporization chamber (28) formed therein, a nozzle (34) provided at an end of a vaporizer (27) at one end in the longitudinal direction of the vaporization chamber (28), and a burner section (36). )When,
A cap (3) attached to the other end of the vaporizer (27)
2), a kerosene supply pipe (33) connected to the cap (32), and a heat receiving fin (4) provided near the nozzle (34) in the vaporizer (27) to recover combustion heat.
5), a parallel part (54, 54) and a U-turn part (55), the U-turn part (55) being on the nozzle (34) side and the parallel part being on both sides of the vaporizer (27). The carburetor heater (48), which is attached by heating and the heat generation density of the parallel part is larger than that of the U-turn part, and is formed of a cloth-like fiber material having good heat conductivity and breathability and oil permeability. The folded fold body (302) is formed in a rod shape such that a hollow portion having a diameter of φd1 is left in the center and each fold is radial,
Moreover, the ratio d1 / of the outer diameter φD and the diameter φd1 of the hollow portion is obtained.
A liquid fuel combustion device comprising: a vaporization promoting wick (29) set so that D is in the range of 20 to 65%. 2. The fold (3) of the wick (29).
2. The liquid fuel combustion apparatus according to claim 1, wherein the number of folded ridges in (02) is set in a range of 22 to 30.