JPH03260507A - oil combustion equipment - Google Patents

Abstract

PURPOSE:To provide a petroleum combustion device for preventing an occurrence of tar and reducing a pressure drop or a thermal radiation loss of a carburettor by a method wherein the carburettor forming a slant surface at an upper part of a side surface of a mixing chamber, having a fed oil nozzle inlet in opposition to the slant surface and an inlet port of the carburettor at its lower part and having a heater therein and some heat receiving fins arranged in perpendicular to an outer wall of the slant surface are provided. CONSTITUTION:When a carburettor 9 is maintained at its set temperature by a heater 13, gasifying air is supplied from an inlet 18 of the carburettor and an oil feeding nozzle inlet 20 to the carburettor and then kerosene is injected from the oil feeding nozzle toward a slant bottom part 14. After the gasifying air strikes against the lower part of the slant bottom part, almost all of the gasifying air ascends along the slant bottom part. In turn, kerosene strikes against the upper part of the slant bottom part, is pushed up by the gasifying air and is gasified while expanding at the slant bottom part to generate gas. Accordingly, even if the speed of the gasifying air is made slow, gasification can be easily carried out and a pressure loss can be restricted low. The combustion gas flows among the heat receiving fins 12 and ascends along the outer wall of the gasification chamber 11, so that the gasification chamber can receive combustion heat sufficiently and no tar is generated when the fuel is gasified at the slant bottom surface. Since the heat receiving fins are positioned below the gasification chamber, a natural convection flow is restricted and the amount of thermal radiation is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an oil combustion apparatus having a heat-receiving vaporizer.

Conventional technology A conventional oil combustion device will be explained below.

As shown in FIG. 5, the vaporizer l has a built-in heater 2 and is formed of a cylindrical vaporization chamber 3, a uniform chamber 4, and a heat receiving wall 5. The heat receiving wall 5 is ring-shaped and is connected to the vaporization chamber 3 and is connected to the uniformity chamber 4.
surrounding. The laminated flame hole 6 is connected to the uniform chamber 4. The vaporizing sinner lower opens tangentially on the circumferential surface of the vaporizing chamber 3 and communicates with a combustion fan (not shown). Oil feed nozzle 8
is provided in the vaporizer lower and communicates with an oil pump (not shown).

The operation of the oil combustion apparatus constructed as above will be described below.The vaporizer 1 and the laminated flame hole 6 are heated and maintained at a high temperature by the heater 2 which is energized. Next, the vaporizing air sent from the combustion fan flows from the vaporizing lower part in the tangential direction of the vaporizing chamber 3, forming a swirling flow.

Further, the kerosene sent from the oil pump collides with the inner peripheral surface of the vaporization chamber 3 from the oil feed nozzle 8 and is vaporized. Then, the generated vaporized gas is mixed with the air sent from the combustion fan to form a premixed gas, which is homogenized in the uniformity chamber 4 and is ejected from the laminated flame hole 6. This premixture is ignited by discharge from an ignition electrode (not shown) in the gap between the laminated flame hole 6 and the heat-receiving wall 5, and combustion is continued to be promoted by air flowing in from the outside of the heat-receiving wall 5.

Problems to be Solved by the Invention However, in the above-mentioned conventional configuration, it is possible to suppress as much as possible the kerosene that collides with the inner peripheral surface of the vaporizing chamber 3 from sliding down the inner peripheral surface of the vaporizing chamber 3, and to prevent the kerosene from sliding down the inner peripheral surface of the vaporizing chamber 3. In order for the kerosene to spread and vaporize, the opening area of the lower part containing the vaporizer is made smaller, and the speed of the air is increased so that the kerosene flows along the inner circumferential surface of the vaporizer chamber 3, so the pressure loss is extremely low. It had the problem of being large. Further, the heater 2 and the heat receiving wall 5 are provided above the vaporization chamber 3, and when the inner circumferential surface of the vaporization chamber 3 is maintained at the set temperature, the bottom surface of the vaporization chamber 3 is lower than the inner circumferential surface of the vaporization chamber 3. Since the temperature is lower than that of the vaporizing chamber 3, there is a problem that tar is likely to be generated when the kerosene that has slipped down the inner peripheral surface of the vaporizing chamber 3 is vaporized on the bottom surface of the vaporizing chamber 3 whose temperature is lower than the set temperature. Furthermore, when maintaining the vaporizer 1 at a set temperature, since the heat receiving wall 5 is a vertical surface, there is a problem in that heat radiation loss from the heat receiving wall 5 due to natural convection is large.

The present invention solves the above-mentioned conventional problems, and aims to provide an oil combustion device that prevents the generation of tar and reduces pressure loss and heat radiation loss in the vaporizer.

Means for Solving the Problems In order to solve this problem, the oil combustion device of the present invention has an inclined surface formed at the upper side of the mixing chamber, and an oil feed nozzle inlet opening at the upper part opposite to the inclined surface. - It has a configuration including a vaporizer having a vaporizer inlet opening at the bottom and a built-in heater, and heat receiving fins provided perpendicularly to the outer wall of the inclined surface.

With this configuration, when the vaporizer is maintained at a set temperature by the heater, vaporized air is supplied to the vaporizer from the vaporizer inlet and the oil feed nozzle inlet, and kerosene is jetted from the oil feed nozzle to the inclined bottom. Ru. Then, after the vaporized air collides with the lower part of the sloped bottom, most of the vaporized air rises along the sloped bottom. - On the other hand, the kerosene collides with the upper part of the slanted bottom, is pushed up by the vaporized air, and spreads along the slanted bottom, vaporizing and becoming vaporized gas. Therefore, by increasing the opening area of the inlet of the vaporizer to allow the vaporized air to rise along the sloped bottom and push up the kerosene, even if the speed of the vaporized air is slowed down, vaporization can be performed easily and pressure loss can be reduced. Next, the vaporized gas and the vaporized air flow while mixing in the mixing chamber to form a premixed gas, and this premixed gas is diffused and made uniform in the uniformity chamber, and is supplied to the burner head for combustion. Since the combustion gas passes between the heat-receiving fins and rises along the outer wall of the vaporization chamber, the vaporization chamber can receive sufficient combustion heat, so no tar is generated even when vaporization is performed on the inclined bottom surface. Furthermore, when maintaining the vaporizer at the set temperature, since the heat receiving fins are located below the vaporization chamber, natural convection is suppressed and the amount of heat radiation is reduced.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings. As shown in FIGS. 1 to 3, the vaporizer 9 includes a mixing chamber 10, a vaporizing chamber 11, and triangular heat-receiving fins 12. The vaporization chamber 11 contains a heater 13 and is provided in communication with the upper part of the mixing chamber 10 . Vaporization chamber 11
The inclined surface 14 is inclined upward from the mixing chamber IO side. The triangular heat receiving fins 12 are attached perpendicularly to the outer wall of the inclined surface 14 so as to be perpendicular to the mixing chamber IO. The premixture outlet 15 is located below the vaporization chamber 11 and the vaporizer 9
A box-shaped uniform chamber 16 opened at the lower side of the chamber is provided below the vaporization chamber 11 to cover the premixture outlet 15 , and a burner head 17 is provided at the upper end of the uniform chamber 16 . The vaporizer head 18 is placed on the lid 1 facing the lower part of the inclined surface 14.
It is opened at 9. An oil supply nozzle 21 is connected to an oil supply nozzle 20 opened in the lid 19 facing the upper part of the inclined bottom surface 14.
will be established. As shown in FIG. 4, a combustion fan 22 is communicated with an air chamber 23, and a heat insulating material 24 is provided on the upper surface of the outer wall of the vaporization chamber 11. 25 is an ignition electrode.

The operation of the oil combustion equipment that has been exposed to ill effects as described above will be explained below. When the heater 13 is energized, the temperature of the vaporizer 9 rapidly rises to the set temperature, and then the amount of heat generated by the heater 13 is reduced to maintain the set temperature, and the air supplied from the combustion fan 22 is sent to the vaporizer 9. Vaporized air supplied to the vaporizer 9 from the population 1B and the oil feed nozzle inlet 20,
It is also divided into two systems for secondary air to be supplied to the burner head 17. After the vaporized air collides with the lower part of the inclined surface 14, most of the vaporized air rises along the inclined surface 14. On the other hand, kerosene is ejected from the oil feed nozzle 21 into the vaporization chamber 11 and collides with the upper part of the inclined surface 14. Then, the kerosene is pushed up by the vaporized air rising along the slope 14, spreads over the surface of the slope 14, and evaporates into vaporized gas.
Next, the vaporized gas and the vaporized air flow while mixing in the mixing chamber 10 to form a premixture, and this premixture is diffused and made uniform in the uniformity chamber 16, and is supplied to the burner head 17 and ignited by the ignition electrode 25. The secondary air continues to promote combustion. The combustion gas passes between the heat receiving fins 12 and enters the vaporization chamber 11.
The inclined surface 14 of the vaporization chamber 11 rises along the outer wall of the vaporization chamber 11.
can receive sufficient heat of combustion.

As described above, according to this embodiment, an inclined surface is formed at the upper side of the mixing chamber, and the oil feed nozzle inlet is opened at the upper part and the vaporizer inlet is opened at the lower part in opposition to the inclined surface. By providing a vaporizer with a built-in vaporizer and a heat-receiving fin installed perpendicularly to the outer wall of the inclined surface, the vaporized air flows along the inclined surface 14, compared to a conventional oil combustion device in which vaporized air and kerosene flow in the same direction. Even if the opening area of the vaporizer 18 is increased to slow down the speed of vaporizing air, vaporization can be easily performed by increasing the kerosene by increasing the amount of kerosene.

In addition, since the temperature of the inclined surface 14 is equalized by the heat received from the attached heat receiving fins 12 and the heater 13, it is possible to prevent the generation of tar that occurs when vaporizing on a surface whose temperature is lower than the set temperature. can.

Furthermore, when maintaining the vaporizer 9 at the set temperature, since the heat receiving fins 12 are located below the vaporization chamber 11, natural convection is suppressed and heat radiation loss from the vaporization chamber 11 can be reduced.

Effects of the Invention As is clear from the description of the embodiments above, the structure of the present vaporizer and the heat-receiving fins provided perpendicularly to the outer wall of the inclined surface prevents the generation of tar and improves the efficiency of the vaporization chamber. It is possible to realize an excellent oil combustion device that can reduce heat radiation loss and pressure loss in the vaporizer.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway perspective view showing the configuration of a vaporizer of an oil combustion device according to an embodiment of the present invention, FIG. 2 is a sectional view of essential parts showing the configuration of the oil combustion device, and FIG. 3 is the same , FIG. 4 is a partially cutaway perspective view, FIG. 4 is a partially cutaway front view, and FIG. 5 is a sectional view showing the configuration of a conventional oil combustion device. 9... Carburizer, 10... Mixing chamber, 11
...... Vaporization chamber, 12 ... Heat receiving fin, 1
3... Heater, 14... Inclined surface, 15
... Premixture outlet, 16 ... Uniformity chamber, 17 ... Burner head, 18 ... Carburizer inlet, 20 ... Oil feed nozzle inlet, 21...
...Oil feeding nozzle, 25...Ignition electrode.

Claims (1)

[Claims] A mixing chamber in which an outlet for the premixture is formed at the lower side of the side, which communicates with a uniform chamber having a burner head provided at the upper end; and an inclined surface that communicates with the upper side of the mixing chamber, and an opening facing below the inclined surface. A vaporizer having a vaporizer inlet and an oil feed nozzle inlet opening oppositely above the slope, a vaporizer with a built-in heater, a heat receiving fin provided perpendicularly to the outer wall of the slope, an oil feed nozzle, and a burner. Oil burning device with head and ignition electrode.