JPS6246977Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an oil combustor that vaporizes petroleum and burns it in a line burner, and particularly relates to a self-heat recovery device that recovers the combustion heat of the line burner and transfers it to the vaporizer.

Conventionally, various oil combustors have been commercialized that heat oil with a preheater or the like and burn the vaporized gas. ) Oil fan heaters, which can be easily and reliably adjusted, have been on the rise in recent years, as they combine the advantages of oil hot air heaters and oil stoves to achieve economical heating.

By the way, the power applied to the preheating heater is quite large at the beginning of combustion, and even during steady combustion, the preheating heater must be intermittently energized so that a predetermined amount of vaporized gas is always generated. Most of the entire electric power at that time was consumed by the preheating heater.

The present invention was developed in view of the above points, and by heating the carburetor using combustion heat during steady combustion, it significantly reduces the electric power supplied to the preheating heater, and also makes the carburetor more compact. This makes assembly with the line burner easy.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

Fig. 1 is a schematic configuration diagram of an oil combustor showing an embodiment of the present invention, Fig. 2 is a partially exploded perspective view of the burner, Fig. 3 is a sectional view of its main parts, and Fig. 4 is a schematic perspective view of the burner section after assembly. It is a diagram.

In the figure, 1 is an oil tank, and 2 is an electromagnetic pump that supplies kerosene from this oil tank 1 to a vaporizer 3 at a rate of several cc per minute.
The operating speed of the pump can be electrically adjusted by a well-known control circuit consisting of an oscillator, a thyristor, etc. The vaporizer 3 includes a vaporizer section 4 that extends through a nozzle pipe (to be described later), a protrusion section 5 that integrally projects from the upper part of the vaporizer section 4, and a lower part of the vaporizer section that is connected to the vaporizer section by welding. It is composed of an auxiliary pipe 6. The vaporizing part 4 and the protruding part 5 are made of brass or the like having good thermal conductivity, while the vaporizer auxiliary pipe 6 is made of metal having poor thermal conductivity, e.g.
formed by sus. 7 is a preheating heater attached to the side wall of the vaporizing section 4. 8 is open while the preheating heater 7 is energized;
This is an electromagnetic valve that closes when energized, and is closed when the vaporization section 4 rises to a predetermined temperature and preheating is completed. A drain pipe 9 has one end connected to the carburetor auxiliary pipe 6 and the other end opened at the upper part of the oil tank 1 via the electromagnetic valve 8. 10 is a vaporized gas obtained by vaporizing the kerosene in the vaporizer 3. Reference numeral 11 denotes a nozzle pipe that extends through the vaporizing section 4, and has a nozzle 12 formed at its tip. 13 is a needle valve with a tip 14 adjacent to the nozzle 12; 15 is the needle valve 1;
3 is a closed type solenoid that opens and closes the nozzle 12 by moving it in the direction of arrow A or B. 16
is a suction port through which the vaporized gas ejected from the nozzle 9 and the air sucked by the vaporized gas flow into the mixing tube 17. A line burner 18 is connected to the mixing tube 15. In the line burner 18, flame ports 19, 19', . . . are arranged in two rows, and a substantially rectangular through hole 20 is provided in the center. The mixing tube 17 is formed shorter than the line burner 18, and as shown in FIG. 3, a step is formed between the suction port 16 and the end of the line burner 18, and the vaporizer 3 is installed here positioned.

The carburetor protrusion 5 is fitted into the through hole 20, and the upper end surface 5' is the upper surface 1 of the line burner 18.
It protrudes a little further than 8'. Reference numeral 21 designates a combustion heat absorbing rod which is fixed to the carburetor protrusion 5 protruding into the through hole 20 of the line burner 18 with screws 22, 22, and is made of brass or the like with good thermal conductivity and is formed into a horizontally elongated shape. , is fixed to the line burner 18 by screws 23, 23. 24 is a packing made of a heat-resistant material such as asbestos or mica, which connects the vaporizer 3 and the line burner 1.
8 is also tightened with screws 25, 25 to prevent gas leakage from inside. 2
A connecting pipe 6 is screwed onto the carburetor auxiliary pipe 6, and is connected to the electromagnetic pump 2 via a cap nut 27.

Next, the operation of the oil fan heater constructed as described above will be explained.

First, turn on the power (operation) switch (not shown).
When turned on, the electromagnetic pump 2 and the preheating heater 7 are energized, kerosene is supplied from the oil tank to the vaporizer 4, and the vaporizer 3 is heated by the preheating heater 7. In this case, the needle valve 13 is urged to move in the direction of arrow A by the closed solenoid 15 so that the tip 14 of the needle valve 13 completely closes the nozzle 12.

Since the electromagnetic valve 8 is molded to be closed when energized, it is open when the vaporizer 3 is below a predetermined temperature, that is, in a preheated state, so the amount of oil in the vaporizer 3 fed by the electromagnetic pump 2 is reduced. When the amount exceeds a predetermined amount, the oil is returned to the oil tank 1.

Next, when the vaporizer 3 reaches a predetermined temperature,
Although not shown, when a heat-sensitive element such as a thermistor operates to start energizing the closed-when-energized solenoid valve 8 and the sealed solenoid 15, the solenoid valve 8 closes and the sealed solenoid 15 closes. Since the needle valve 13 is operated to be pulled in the direction of arrow B, the nozzle 12 is opened. Then, the oil level in the vaporizer 3 becomes a little higher than the position of the drain pipe 9, and the vaporized gas, which has been heated by the preheating heater 7 and becomes gaseous, is ejected from the nozzle 12 and flows into the suction port 16 of the mixing pipe 17. More line burner 1
Sent to 8.

Thereafter, although not shown, the combustion is ignited by a well-known ignition device, and steady combustion begins. The amount of heat generated by the line burner 18 can be changed steplessly by changing the amount of vaporized gas by electrically adjusting the operating cycle of the electromagnetic pump. or,
Primary air, which acts as combustion air, is supplied by drawing the surrounding air together with the vaporized gas into the mixing tube 17 due to the Ventury effect that occurs when the vaporized gas is ejected from the nozzle 12.

During the combustion operation, the preheating heater 7 is controlled and energized by a control circuit (not shown) so that the temperature of the vaporizer 3 is kept substantially constant. Then, when the combustion shifts to steady state, warm air is supplied into the room by the operation of a well-known convection fan.

Since the combustion heat of the line burner 18 is transmitted to the vaporizing section 4 via the vaporizer protrusion 5, during steady combustion, the amount of electricity applied to the preheating heater 7 attached to the vaporizer 3 is relatively reduced. can do. Since the vaporizer protrusion 5 is made of a metal material with excellent thermal conductivity, such as brass, heat radiation is extremely reduced, resulting in good thermal efficiency. Therefore, the power consumption of the preheating heater 7 can be reduced, and an oil combustor suitable for the energy saving era can be provided.

Next, when extinguishing the fire, turn on the power (operation) switch.
When turned OFF, the electromagnetic pump 2 stops and the oil supply is cut off, and the sealed solenoid 1
5 operates to move the needle valve 13 in the direction of arrow A, and the nozzle 12 is completely closed by the tip 14 of the needle valve 13.

At the same time, the electromagnetic valve 8 is opened, so that the oil in the vaporizer 3 is returned to the oil tank 1 through the drain pipe 9. This container contains oil remaining in the vaporizer at least above the drain pipe 9, so when this oil is returned to the oil tank 1, the volume of the vaporizing section 4 of the vaporizer 3 suddenly increases. As a result, the internal pressure of the vaporizer 4 rapidly decreases, and the pressure of the vaporized gas remaining in the vaporizer 3 causes the vaporized gas to leak from the nozzle 12 or the space around the upper part of the vaporizer 3, causing a bad odor. There is no fear of drifting.

Further, the above-mentioned convection fan for circulating hot air stops operation at the same time as extinguishing the fire.

The above operation explanation was given using an example of an oil fan heater (forced convection stove) that gasifies oil and burns it in a line burner.
It is also possible to use it in a normal forced air supply/exhaust oil hot air heater.

As explained above, the present invention has a burner section in which a mixing tube and a line burner are integrally connected, and a vaporizer, and the petroleum vaporized by the vaporizer is guided to the burner section and the line In an oil combustor that burns in a burner, the length of the mixing tube is formed to be shorter than the length of the line burner, and a step is provided between the suction port of the mixing tube and the line burner, and the upper part of the vaporizer is provided with a step. A protruding part is formed integrally with the line burner, and this protruding part is installed from below through the stepped part of the line burner, and the protruding part and the line burner are fixed, so that the combustion generated by the line burner during steady combustion. Heat can be transferred to the vaporizer through the protrusion, and the electric power supplied to the preheating heater can be significantly saved, which is of high practical value.
Moreover, since the protrusion passes through the line burner, the recovered combustion heat is transferred to the vaporizer side without wasting any heat other than the heat that is effectively used to raise the temperature of the vaporized gas. is very good.

Furthermore, since the heat recovery protrusion is also used as a means for fixing the burner section, the overall configuration can be simplified, and the burner section and vaporizer are directly positioned, so the mixing tube of the burner section can be The positioning relationship between the suction port and the nozzle of the vaporizer becomes accurate, and the combustion characteristics become stable.

[Brief explanation of the drawing]

Fig. 1 is a schematic configuration diagram of an oil combustor showing an embodiment of the present invention, Fig. 2 is a partially exploded perspective view of the burner, Fig. 3 is a sectional view of its main parts, and Fig. 4 is a schematic perspective view of the burner part. 3 is a vaporizer, 4 is a vaporization part, 5 is a vaporizer protrusion (metal body), 7 is a preheating heater, 18 is a line burner, 19, 19', ... are flame ports, 20 is a through hole, 21 is a It is a combustion heat absorption rod.

Claims (1)

[Scope of Claim for Utility Model Registration] It has a burner section in which a mixing tube and a line burner are integrally connected, and a vaporizer, and petroleum vaporized by the vaporizer is guided to the burner section, and the oil is fed to the line burner. In an oil combustor for burning oil, the length of the mixing tube is formed to be shorter than the length of the line burner, a step is provided between the suction port of the mixing tube and the line burner, and the mixture tube is integrated with the upper part of the vaporizer. An oil combustor characterized in that a protrusion is formed, the protrusion penetrates the step part of the line burner from below, and the protrusion and the line burner are fixed.