JP2808830B2 - Combustion equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a combustion device using petroleum as a fuel.

2. Description of the Related Art Conventionally, this type of combustion apparatus has been configured as shown in FIG.

That is, reference numeral 1 denotes a heater which is cast into the bottomed vaporizing cylinder 2. Reference numeral 3 denotes a primary air pipe provided on a side wall of the vaporization cylinder 2 and a fuel ejection pipe 4 provided inside. Reference numeral 5 denotes a heat receiving portion provided at the upper end of the vaporization cylinder 2, reference numeral 6 denotes a flame port provided along the heat receiving portion 5, and numeral 7 denotes a flame port cap.

Here, when the vaporizing cylinder 2 energized to the heater 1 reaches a predetermined temperature, the combustion fan and the fuel supply pump (both not shown) are operated, and primary air for vaporization is blown from the primary air pipe 3, Fuel is supplied from the fuel ejection pipe 4. The supplied fuel is vaporized on the inner wall of the heated vaporization cylinder 2 and
It mixes with the secondary air to become a vaporized gas. The vaporized gas is vaporized cylinder 2
And is squirted from the flame outlet 6 and ignited by an igniter (not shown) to start combustion. Thereafter, the heat receiving unit 5 receives the heat of the combustion flame, feeds it back to the vaporization cylinder 2 to promote vaporization, stops the power supply to the heater 1, and continues combustion.

However, in the conventional configuration as described above, the vaporizing cylinder 2
Since the vaporized gas vaporized in the jet is ejected from the flame outlet 6 in a short time, the mixing with the primary air is incomplete and a yellow fire is generated,
There is a problem that the exhaust gas characteristics are deteriorated. In addition, since vaporization and mixing are performed in the vaporization cylinder 2, there is a problem in that tar is accumulated at the bottom and the lower part of the inner wall of the vaporization cylinder 2 to cause poor vaporization with respect to tar generation due to the use of deteriorated oil or the like. Was.

The present invention solves such a conventional problem by promoting the mixing of the vaporized gas and the primary air, preventing the occurrence of yellow flame, improving the exhaust gas characteristics, and preventing the accumulation of tar in the vaporizer. The purpose is to maintain excellent vaporization characteristics.

Means for Solving the Problems To solve the above problems, a combustion apparatus of the present invention comprises a mixing chamber, a flame port for burning vaporized gas from the mixing chamber, and a mixing chamber communicating with the mixing chamber. A vaporizer provided on the upper part of the vaporizer, wherein the flame outlet side outer surface of the vaporizer is a heat receiving portion and the inner surface is inclined to form a vaporizing surface,
Further, a primary air inlet and a combustion nozzle are provided so as to face the vaporizing surface of the vaporizer.

Effect of the Invention According to the present invention, the above-described structure promotes mixing of the vaporized gas flowing out of the vaporizer with the primary air before passing through the mixing chamber provided at the lower part and reaching the flame outlet, so that the exhaust gas characteristics are improved. Is improved. Further, since the vaporized gas flows out from the lower portion of the vaporizer, the generated tar flows out to the mixing chamber without accumulating in the vaporizer, and the vaporization characteristics are maintained.

Embodiment An embodiment of the present invention will be described below with reference to FIG.

In the figure, reference numeral 8 denotes a bottomed box-shaped mixing chamber, in which an opening 10 for a flame port 9 and an air-fuel mixture inlet 11 are connected to each other.
A heat receiving wall 12 erected from a part of the mixing chamber 8 is provided around the flame outlet 9. The inside of the mixing chamber 8 is a partition
A passage 14 narrowed from the top by 13 is provided.
Above the mixture inlet 11, a mixture outlet 16 provided below the box-shaped vaporizer 15 is provided in close contact therewith. The outer surface of the vaporizer 15 on the side of the flame opening 9 is a heat receiving portion 17, and the inner surface of the heat receiving portion 17 is inclined to form a vaporizing surface 18. 19 is a heater cast into the vaporizer 15. On a part of the side wall of the vaporizer 15,
A primary air inlet is provided to face the vaporizing surface 18, and a fuel nozzle 21 is inserted inside the primary air inlet. The tip of the fuel nozzle 21 is provided to face the vaporizing surface 18. 22 is a combustion flame.

In the above configuration, when the heater 19 is energized and the carburetor 15 reaches a predetermined temperature, the combustion fan and the fuel supply pump (both not shown) are operated, and primary air is blown from the primary air inlet. The fuel is ejected. The ejected fuel is diffused while being blown up by the primary air on the inclination of the vaporizing surface 18 to promote vaporization. The fuel vaporized on the vaporizing surface 18 is mixed with the primary air to become a vaporized gas, and is supplied from the gas mixture outlet 16 of the vaporizer 15 to the gas mixture inlet of the mixing chamber 8.
It flows into the mixing chamber 8 through 11. The vaporized gas meanders in the passage 14 narrowed by the partition 13 to promote more uniform mixing. The vaporized gas is sent from the opening 10 of the mixing chamber 8 to the flame port 9, is ejected from the flame port 9, is ignited by an igniter (not shown), and a combustion flame 22 is formed in the flame port 9, and combustion is performed. Is started. The heat of the combustion flame 22 is received by the heat receiving portion 17 of the vaporizer 15 and the vaporizer
15 Give feedback to the whole. Since the vaporizing surface 18 is provided at a position inside the heat receiving section 17, the fastest and most heat is fed back among the respective sections of the vaporizer 15, and vaporization is promoted. The heater 19 keeps the temperature of the carburetor 15 constant while the energization is turned on and off, and continues the combustion. Also, the heat of the combustion flame 22 is fed back from the heat receiving wall 12 of the mixing chamber 8 to each part of the mixing chamber 8 to maintain the temperature of the mixing chamber 8 at a high temperature and promote mixing. As a result, the vaporized gas is
After flowing out of the nozzle 15, it is meandered by the partition 13 in the mixing chamber 8 and is sufficiently mixed in the process up to the flame opening 9, so that the occurrence of yellow flame is prevented and the exhaust gas characteristics are reduced. Can be improved. Further, even if tar is generated by using the deteriorated oil or the like, since the tar flows down along the vaporizing surface 18, the tar does not accumulate on the vaporizing surface 18 and good vaporization characteristics can be maintained. Further, the tar component dropped from the vaporizing surface 18 and the degraded oil that cannot be completely vaporized are supplied to the gas mixture outlet 16 at the lower part of the vaporizer 15 and the gas mixture inlet of the mixing chamber 8.
As it falls through 11 into the mixing chamber 8 and accumulates there,
Tar does not accumulate in the vaporizer 15 and good vaporization characteristics can be maintained. Further, since the vaporizing surface 18 is provided inside the heat receiving unit 17, a large amount of heat can be obtained, and a large amount of vaporization can be obtained. Further, in this embodiment, since the vaporizing surface 18 is inclined, the fuel ejected from the fuel nozzle 21 spreads along the vaporizing surface 18, the effective vaporizing surface 18 increases, and the vaporization is promoted.

Effects of the Invention As is apparent from the above description of the embodiment, the liquid fuel combustion device of the present invention has the following effects.

(1) A vaporizer and a flame port are connected to the upper part of the mixing chamber. The vaporization gas flows through the vaporizer, the mixing chamber, and the flame port to promote mixing and prevent yellow fire. As a result, the exhaust gas characteristics can be improved.

(2) Since a vaporizer is provided at the upper end of one end of the mixing chamber,
Tar components fall from the lower part of the vaporizer into the mixing chamber, preventing tar accumulation in the vaporizer and maintaining good vaporization characteristics.

(3) Since the vaporizing surface is provided with an inclination, the fuel ejected from the combustion nozzle is diffused while being blown up by the primary air on the inclination of the vaporizing surface, so that the vaporization is promoted and a large vaporizing ability can be obtained. Further, since the deteriorated oil does not stay on the inclined vaporized surface, tar does not accumulate on the vaporized surface, so that good vaporization characteristics can be maintained.

(4) Since the vaporization surface is provided inside the heat receiving section, a large amount of heat can be obtained quickly, and a large vaporization ability can be obtained.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a combustion apparatus according to an embodiment of the present invention, and FIG. 2 is a partial sectional view of a conventional combustion apparatus. 8: Mixing chamber, 9: Flame outlet, 11: Mixture inlet, 15 ...
… Vaporizer, 16… mixture outlet, 17… heat receiving part, 18… vaporization surface, 20… primary air inlet, 21… combustion nozzle.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F23D 11/44 F23D 11/10

Claims (1)

(57) [Claims] 1. A mixing chamber, a flame port for burning a vaporized gas from the mixing chamber, and a vaporizer provided at an upper portion of the mixing chamber so as to communicate with the mixing chamber. A combustion apparatus in which an outer surface on the side of a flame opening is used as a heat receiving portion, an inner surface thereof is inclined to form a vaporizing surface, and a primary air inlet and a combustion nozzle are provided to face the vaporizing surface of the vaporizer.