JPS5923932Y2 - burner - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a burner equipped with a flame-holding ring, and particularly aims to shorten the preheating time.

Conventionally, an igniter was often used to vaporize and ignite liquid fuel such as kerosene, but the igniter's ignition discharge position is a part of the burner mouth, so if the kerosene vaporization temperature is low, The combustion speed was slow, and even if a part of the burner was ignited, the flame would not spread all around the burner, resulting in the inconvenience that kerosene vaporized gas would come out in an incompletely combusted state.

Therefore, it was necessary to continuously energize the preheating heater for 2 to 3 minutes.

The present invention was developed in view of the points mentioned above, and includes a ceramic flame-holding link made by embedding a high-melting point metal such as tungsten or molybdenum and sintering it around the burner nozzle. By forcibly heating the surrounding area, even if the temperature of the kerosene vaporized gas is low, it can be completely ignited.

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

Figures 1a and l) are schematic diagrams of the ceramic flame-holding ring attached to the burner of the present invention, and 1 is the ceramic flame-holding ring main body made of sintered alumina ceramics, and the interior contains tungsten and other materials. An ignition heater 2 made of a high-melting point metal such as molybutin is embedded, and an external lead wire 3 is formed.

FIG. 2 is a cross-sectional view showing an embodiment of the present invention in which the ceramic flame-holding ring 1 is attached to a ring burner 4, FIG. 3 is a schematic configuration diagram of a combustion apparatus using the embodiment of the present invention, and FIG. 4 shows an example of an electrical circuit diagram of the above-mentioned combustion device.

In the figure, 5 is made of aluminum with a thermostat 6 attached to the bottom, a fuel supply pipe 7 for supplying kerosene vaporized gas connected to the upper part of the side wall, and a preheating heater 8 tightly attached to the lower part of the side wall. The ring burner 4 is composed of a burner head 9 placed on the upper part of the ring burner 4, and a burner head 9 arranged in a circumferential manner between the flame ports 10.

The ceramic flame-holding ring 1 is installed above and on the periphery of the ring burner 4, and prevents the combustion flame formed at the flame port 10 from blowing out, and allows smooth transition of combustion when adjusting the firepower. I have a job to do.

Reference numeral 11 denotes an atomizing tube that atomizes kerosene supplied from the cartridge tank 12 through the fuel supply pipe 13 and sends it to the fuel supply pipe 7.

Reference numeral 14 denotes an ultrasonic vibrator that is closely attached to the center of the bottom wall of the atomizing tube 11, and is supplied with electric power from a known ultrasonic oscillation circuit 15.

Reference numeral 16 is a combustion blower that supplies combustion air to the atomizing tube 11, and reference numeral 17 is a combustion blower that reduces the amount of combustion air during ignition to relatively increase the atomized fuel concentration so that ignition can be carried out efficiently. In addition, it is an air valve that can arbitrarily adjust the amount of air to an appropriate amount when normal combustion is reached.

18 is a switch of the ultrasonic oscillation circuit 14.

19 is an ignition switch for the ignition heater 2, and 20 is a power switch for the power source 21.

A series circuit consisting of the ignition switch 19 and the ignition heater 2, a series circuit consisting of the thermostat 6 and the preheating heater 8, a series circuit consisting of the ultrasonic oscillation circuit switch 18 and the ultrasonic oscillation circuit 14, and a combustion blower 1.
6 are connected in parallel to the power source 21 via a power switch 20, respectively.

Next, the operation of an embodiment of the present invention having the above configuration will be explained.

First, when the power switch 20 is closed, the ignition switch 19
Electricity is supplied to the preheating heater 7 and the blower 16 via the ignition heater 2 in the flame-holding ring 1 and the thermostat 6.

The flame-holding ring 1 becomes red hot in 20 to 30 seconds after being energized, and the temperature near the flame nozzle 10 becomes quite high, and the kerosene vaporized gas spouted from the flame nozzle 10 is in a state of being able to ignite.

Next, the blower valve 17 is throttled to make the amount of combustion air relatively small compared to the amount of atomized kerosene, and the switch 18 of the ultrasonic oscillation circuit 14 is closed, and the ultrasonic oscillation circuit 14 is energized. Then, the ultrasonic vibrator 14 attached to the bottom of the atomizing cylinder 11 starts oscillating.

Then, the kerosene 22 in the atomizing tube 11 supplied from the cartridge tank 12 receives the vibration energy of the ultrasonic vibrator 14, and very fine particles of kerosene are generated, forming a so-called atomized state.

This atomized kerosene is mixed with the combustion air blown by the combustion blower 16 and is sent to the vaporization cylinder 5 via the fuel supply pipe 7.

The vaporizing tube 5 is heated in advance by the preheating heater 7, and since the vaporizing tube 5 is usually made of a material with good heat conductivity such as alumina, the vaporizing tube 5 is located near the burner head 9 and the flame nozzle 10. is heated efficiently.

At the same time, the flame-holding ring main body 1 maintains a sufficiently red-hot state, so even when the temperature of the kerosene vaporizing power spouted from the flame port 10 is slightly low, the flame stabilization ring body 1 maintains a sufficiently red hot state.
Since the red-hot flame-holding ring 1 is attached over the circumference, complete ignition can be achieved at all flame openings of the burner 4.

When this ignition starts, the vaporizing cylinder 5 is also heated by the heat of the combustion flame, so the temperature of the air fl' and the cylinder 5 rises rapidly, and at a predetermined temperature, the thermostat 6 is activated and the contact is opened. Then, the power supply to the preheating heater 7 is stopped.

This time is approximately 15 to 20 degrees after ignition.

When the preheating heater 7 is no longer energized, the combustion has completely shifted to steady state combustion, so the above-mentioned blower valve 17 can be set at a position where the throttle operation is canceled and an appropriate amount of air is blown.

In normal cases, when a steady state of combustion is reached, the temperature of the vaporizer tube 5 is kept at a substantially constant temperature by the combustion flame, and combustion continues.

Therefore, it becomes possible to ignite 20 to 30 seconds after turning on the power switch 20, and after another 15 to 20 seconds, the combustion state becomes completely steady.When using the ultrasonic vibrator 14 as in the embodiment of the present invention, Now, the vibration energy generated from the ultrasonic vibrator 14 can be adjusted to increase or decrease the amount of atomization, thereby making it possible to perform normal thermal power adjustment.

Therefore, the time it takes to reach steady combustion is 35 to 50 minutes after electricity is applied.
0 seconds, which is the time taken by the conventional igniter ignition method (
2 to 3 minutes).

Note that power can be saved by opening the ignition switch 19 approximately 20 seconds after ignition is completed.

As explained above, according to the present invention, tungsten,
Equipped with a ceramic flame-holding ring made by embedding a high-melting point metal such as molybdenum and sintering it, it takes 35 to 50 seconds to reach steady combustion after electricity is turned on, compared to the 2 to 3 minutes of a conventional one-igniter type. In comparison, preheating time can be significantly shortened.

Furthermore, since an igniter is not required at all, costs can be reduced, and this is of extremely high practical value.

[Brief explanation of the drawing]

Figures 1a and b are schematic diagrams of a ceramic flame-holding ring, Figure 2 is a burner showing an embodiment of the present invention, Figure 3 is a schematic diagram of a combustion device using the burner of the present invention, and Figure 4 is a schematic diagram of a combustion device using the burner of the present invention. It is an electric circuit diagram of a combustion device, and 1 is a ceramic flame-holding ring;
2 is an ignition heater, 4 is a ring burner, 5 is a vaporizing cylinder,
9 is a burner head, and 10 is a flame port.

Claims (1)

[Scope of utility model registration request] A burner characterized by being equipped with a ceramic flame-holding ring in which a high-melting point metal such as tungsten or molybdenum is buried and integrally sintered.