JP2748675B2 - 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 A conventional combustion apparatus of this type is configured as shown in FIG.

That is, reference numeral 1 denotes a heater, which is cast into a bottomed cylindrical 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. 5 is a vaporization cylinder 2
Is a heat receiving portion provided at the upper end of the heat receiving portion, 6 is a flame port provided along the heat receiving portion 5, 7 is a flame port cap, and 8 is a combustion flame.

Here, when the heater 1 is energized and the vaporization cylinder 2 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 8 and feeds it back to the vaporizing cylinder 2 to promote vaporization, stop energizing the heater 1 and continue combustion.

However, in the above-described configuration, the vaporized gas vaporized in the vaporization cylinder 2 is ejected from the flame port 6 in a short time, so that the mixing with the primary air is incomplete and the yellow flame This causes a problem of deteriorating exhaust gas characteristics. In addition, since the distribution of the primary air is also uneven in the circumferential direction and the vertical direction of the flame outlet 6, when the air is excessive, the flame holding of the combustion flame 8 becomes unstable, CO is generated, and the exhaust gas characteristics deteriorate. Then, locally, the combustion flame 8 closely adheres to the flame port 6, and the temperature of the flame port 6 rises, causing the flame to glow red. .

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 reducing the distribution of the combustion flame formed in the flame opening. The aim is to make it uniform, prevent the generation of CO, improve the exhaust gas characteristics, reduce the red heat of the flame outlet, and prevent flashback.

Means for Solving the Problems In order to solve the above problems, a combustion apparatus of the present invention is configured to communicate with a mixing chamber, a porous flame port provided at an upper portion of the mixing chamber, and the mixing chamber. A vaporizer provided at the top of one end of the mixing chamber, a flame tip provided at a position of the flame port remote from the vaporizer, and a portion of the bottom of the mixing chamber raised. And a slope provided so as to gradually rise from the step toward the front end of the flame port.

Operation According to the present invention, the above-described configuration allows the vaporized gas flowing out of the vaporizer to pass through the mixing chamber provided at the lower part, pass through a long space up to the flame opening, and collide with the stepped portion, and Since the mixing with air is promoted, the exhaust gas characteristics are improved. In addition, the vaporized gas collides with the step and disperses to the front end of the flame port and the vaporizer side, and is gradually ejected toward the front end of the flame port by the inclined part, so that the combustion flame is formed uniformly and the exhaust gas characteristics It is intended to improve the fire and prevent flashback.

An embodiment of the present invention will be described below with reference to FIG. 1 of the accompanying drawings.

In FIG. 1, reference numeral 9 denotes a mixing chamber, in which a porous flame port 10 is provided at the top. Reference numeral 11 denotes a cylindrical vaporizer provided at the upper end of one end of the mixing chamber 9. At the top of the mixing chamber 9 is a flame outlet 10
And an air-fuel mixture inlet 13 are connected to each other.
A heat receiving wall 14 erected from a part of the mixing chamber 9 is provided around the flame outlet 10. A flame tip portion 15 is provided at a part of the flame outlet 10 farthest from the vaporizer 11 side.
Reference numeral 16 denotes a step provided by raising a part of the bottom of the mixing chamber 9 toward the flame opening 10. Reference numeral 17 denotes an inclined portion provided so as to gradually rise from the step portion 16 toward the flame outlet tip portion 15 toward the flame outlet portion 10. In the interior of the mixing chamber 9, there is provided a partition 18 projecting downward between the opening 12 and the mixture inlet 13, and a passage narrowed from above by the partition 18.
19 are provided. Above the mixture inlet 13, a mixture outlet 20 provided below the cylindrical vaporizer 11 is provided in close contact therewith. Reference numeral 21 denotes a heat receiving portion provided by projecting a part of the side wall of the vaporizer above the flame opening portion 10. Inside the heat receiving portion 21, an inclined vaporizing surface 22 is provided. 23 is a heater cast into the vaporizer 11. A primary air inlet 24 is provided in a part of the side wall of the carburetor 11, and a fuel nozzle 25 is inserted inside the primary air inlet 24. The tip of the fuel nozzle 25 is a vaporizing surface
It is provided for 22. 26 is a combustion flame.

In the above configuration, when the heater 23 is energized and the carburetor 11 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 24, and the fuel nozzle 25 Fuel is ejected from The ejected fuel is diffused while being blown up by the primary air on the inclination of the vaporizing surface 22, and the vaporization is promoted. The fuel vaporized on the vaporizing surface 22 is mixed with the primary air to become a vaporized gas, and is supplied from the gas mixture outlet 20 of the vaporizer 11 to the gas mixture inlet of the mixing chamber 9.
It flows into the mixing chamber 9 through 13. The vaporized gas meanders in the passage 19 narrowed by the partition 18 to promote more uniform mixing. Further, the vaporized gas collides with the stepped portion 16 raised from the bottom of the mixing chamber 9 and a part of the vaporized gas is directed to the front end 15 of the flame outlet. Is uniformly diffused in the opening 12 provided at the lower part of the opening. In addition, the vaporized gas gradually rises along the inclined portion 17, and a large amount of the vaporized gas is eccentrically ejected from the flame front end portion 15 by utilizing the narrowing of the gap between the flame outlet portion 10 and the inclined portion 17. A uniform amount is distributed so as not to let it. The vaporized gas is sent from the opening 12 of the mixing chamber 9 to the flame port 10, is ejected from the flame port 10, is ignited by an igniter (not shown), and a combustion flame 26 is formed in the flame port 10,
Combustion is started. The heat of the combustion flame 26 is received by the heat receiving section 21 of the vaporizer 11 and fed back to the entire vaporizer 11.
Since the vaporizing surface 22 is provided at a position inside the heat receiving unit 21, the vaporizing surface 22 is the fastest among the components of the vaporizer 11, a large amount of heat is fed back, and vaporization is promoted. The heater 23 keeps the temperature of the carburetor 11 constant while turning on and off the power supply, and continues the combustion. Further, the heat of the combustion flame 26 is also fed back to each part of the mixing chamber 9 from the heat receiving wall 14 of the mixing chamber 9,
Mixing is promoted by keeping the temperature of the mixing chamber 9 at a high temperature. As a result, since the vaporized gas flows out of the vaporizer 11, is meandered by the partition 18 in the mixing chamber 9, and is sufficiently mixed in the process up to the flame port 10, the yellow gas is emitted. Generation can be prevented and exhaust gas characteristics can be improved. In addition, the vaporized gas is
And the vaporizer 11 and the vaporizer 11
While being uniformly dispersed on the side, it is raised along the inclined portion 17 and sent to the flame outlet 10 while being controlled to a uniform distribution toward the flame front end portion 15, so that the uniform Combustion flames 26 are formed, stabilizing flame holding when air is excessive, improving exhaust gas characteristics, and reducing local red heat of the flame opening 10 can prevent flashback. Also, heat receiving part
Since the vaporizing surface 22 is provided inside 21, a large amount of heat can be obtained, and a large amount of vaporization can be obtained. Further, since the vaporizing surface 22 is inclined, the fuel ejected from the fuel nozzle 25 spreads along the vaporizing surface 22, and the effective vaporizing surface 22 increases, and the vaporization is promoted.

Effects of the Invention As described above, according to the combustion device of the present invention, the following effects can be obtained.

(1) Since the vaporizer and the flame outlet are connected in the upper part of the mixing chamber, the vaporization gas flows through the path of the vaporizer, the mixing chamber and the flame outlet to promote the mixing and prevent the occurrence of yellow flame. Exhaust gas characteristics.

(2) Since the stepped portion is provided at the bottom of the mixing chamber, the vaporized gas is uniformly dispersed on the front end side and the carburetor side of the flame port, thereby stabilizing the flame holding of the combustion flame and localizing the flame port. By effectively eliminating red heat, it is possible to improve exhaust gas characteristics and prevent flashback.

(3) Since the inclined portion is provided at the bottom of the mixing chamber, the vaporized gas moves along the inclined portion and is distributed in a uniform amount toward the front end of the flame port. By eliminating local red heat at the mouth, it is possible to improve exhaust gas characteristics and prevent flashback.

[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. 9: Mixing chamber, 10: Flame mouth, 11: Vaporizer, 15: Flame tip, 16: Step, 17: Inclined part.

Claims (1)

(57) [Claims] A mixing chamber; a porous flame port provided at an upper portion of the mixing chamber; a vaporizer provided at an upper portion at one end of the mixing chamber so as to communicate with the mixing chamber; A flame tip provided at a position remote from the vaporizer in the flame port, a step provided by raising a part of the bottom of the mixing chamber, and a flame tip provided from the step. And an inclined portion provided so as to gradually rise toward the portion.