JPS6016845Y2 - combustion device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a combustion device that atomizes liquid fuel using an ultrasonic vibrator and burns the atomized fuel using a burner.

In conventional combustion devices of this type, the temperature of the burner is low at the time of ignition, so atomized liquid fuel adheres to the flame nozzle and the flame nozzle is closed with liquid fuel, or the liquid fuel does not reach the flame nozzle at the beginning of ignition. It adheres to the air, resulting in an excessive amount of air.

For this reason, lift combustion continues for a while, and then the liquid fuel adhering to the flame nozzle evaporates, resulting in excess fuel and abnormal combustion in a red flame state.

In addition, in order to ignite the atomized liquid fuel at the time of ignition, a special igniter that has a larger discharge energy than a conventional igniter that ignites vaporized liquid fuel is used. If the liquid fuel is not ignited in the burner section and its particulates adhere to the heat exchanger, the particulates may vaporize after ignition and cause explosive combustion.

Furthermore, an atomization tank using an ultrasonic vibrator is affected by the viscosity and surface tension of the liquid fuel, and the amount of atomization increases as the temperature rises, resulting in unstable combustion.

In view of the above, the present invention aims to prevent atomized fuel from adhering to the flame port of the burner, facilitate ignition, and stabilize combustion. Each tank is divided into two, the divided burners and the atomization tank are communicated with each other, and an ultrasonic vibrator is provided at the bottom of each of the divided atomization tanks,
A sheathed heater is provided in the split burner on the side closer to the atomization tank, and a burner thermometer is attached to the other split burner, and the burner thermo detects the combustible temperature of the other split burner. The present invention is characterized in that the burner thermometer is connected to a control circuit that operates an ultrasonic vibrator.

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

In FIG. 1, reference numeral 1 denotes an atomization tank that atomizes liquid fuel (hereinafter referred to as fuel) supplied via an oil controller 4, and is separated by a partition wall 2 having a communication hole 3 into left and right atomization chambers 1a.
, 1b.

Each chamber 1a, lb has a communication hole 5.5b provided in its upper part.
The ultrasonic vibrator 7 connected to the oscillation circuits 8a and 8b is connected to the blower 6 through the
a and 7b are provided, respectively.

9 is a control circuit connected to the oscillation circuits 8a and 8b.

10 is a combustion chamber 11a, llb having a secondary air hole 10a.
is a mixing chamber provided at the bottom of the combustion chamber 10, and is connected to the oil pipe 12.
It communicates with the left and right atomization chambers 1a and lb via a and 12b, respectively.

13 is a return pipe connecting the left atomization chamber 1a and the left and right mixing chambers 11a and llb; 14 is a horizontal burner provided in the combustion chamber 10 and has a flame port 16; the left and right burners 14a are separated by a partition wall 15; , 14b.

17 is a sheathed heater provided in the right burner 14a14b.

18 is the combustion chamber 1 facing the flame port 16 of the burner 14.
A discharge type igniter 19 attached to the peripheral wall of the left burner 14a is connected to the control circuit 9 through a burner thermostat attached to the outer wall of the left burner 14a.

20 is provided outside the lower part of the combustion chamber 10, and the secondary air hole 1
An air chamber 21 communicates with the inside of the combustion chamber 10 via 0a, and an air supply pipe 21 connects the air chamber 20 and the blower 6.

FIG. 2 shows the configuration of the control circuit 9, which includes an ultrasonic vibrator 7a, an oscillation circuit 8a, a blower 6, an igniter 18 connected to the relay 22a, a burner thermostat 19 connected to the relays 22a and 22b, and a relay 22b. A sheathed heater 17 and a self-heating bimetal thermostat 23 are connected in series to an oscillator 8b, an ultrasonic vibrator 7b, and a relay 22b.
etc. are connected in parallel to the electrical circuit.

Next, the operation of this embodiment configured as described above will be explained.

When the sheathed heater 17 and the bimetal thermostat 23 are energized by the ignition operation, the contacts of the bimetal thermostat 23 are closed before the internal heater is heated by sufficient heat generated by the sheathed heater 17, and the igniter 1B and the blower 6 And the oscillation circuit 8a is energized.

Therefore, the ultrasonic vibrator 7a vibrates via the oscillation circuit 8a, so that the fuel in the left atomization chamber 1a is atomized.

On the other hand, air is supplied by the blower 6 to the left and right atomization chambers 1a and 1b through the communication hole 5aw5b, and is also supplied into the combustion chamber 10 through the air supply pipe 21, the air hole 20, and the two carbon-nitrogen holes lea.

The air that has flowed into the left atomization chamber 1a flows together with the atomized fuel through the oil feed pipe 12a into the right mixing chamber 11b where they are mixed, and this mixture is supplied to the right burner 14b.

Since the right burner 14b is heated by the sheathed heater 17, the supplied fuel is instantaneously vaporized, and this vaporized fuel is easily ignited by the igniter 18 and combusted.

As described above, when the fuel is combusted in the right burner 14b, the combustion heat is transferred to the left burner 14a, and the temperature of the burner wall increases, so that the contact of the burner thermostat 19 is turned on.

For this reason, the relays 22 a and 22 b of the control circuit 9 are switched, and the energization of the sheathed heater 17 and the igniter 18 is cut off, and at the same time, the oscillation circuit 8 b is energized.
The ultrasonic vibrator 7b vibrates to atomize the fuel in the right atomization chamber 1b.

The atomized fuel passes through the oil feed pipe 12b to the left mixing chamber 1.
1a and then introduced into the left burner 14a.

This introduced atomized fuel is heated by the left burner 14a.
It is instantaneously vaporized and ejected from the flame port 16, and at the same time, it is ignited by the balance by the flame from the right burner 14b, resulting in steady combustion.

As explained above, the present invention has the following effects.

(1) Since the atomized fuel is supplied after the flame nozzle of the burner is heated by the sheathed heater, the fuel instantly vaporizes at the flame nozzle and is easily ignited.

Therefore, a general igniter used for gas appliances is sufficient, and a special igniter with a large amount of discharge energy is not required.

(2) At the initial stage of ignition, use one of the two split burners,
Since combustion is performed at half of the steady combustion amount and regular combustion is performed after the other burner is sufficiently heated, the electric power of the sheathed heater can be reduced.

(3) Since the atomized fuel adhering to the burner wall is atomized at the initial stage of ignition, only half of the steady combustion amount is atomized, so the amount of fuel that returns to the atomization tank via the return pipe is half.

Moreover, during steady combustion, the burner wall is sufficiently heated, so the atomized fuel instantly vaporizes, so there is no risk of it returning to the atomization tank via the return pipe, thus stabilizing combustion. .

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the combustion apparatus of the present invention, and FIG. 2 is a control circuit diagram thereof. 1...Atomization tank, la, lb...Left, right atomization tank, 7a, 7b...Ultrasonic vibrator, 9...
...Control circuit, 14...Burner, 14at
14b...Left, right burner, 17...
・Sheathed heater, 19... Burner thermo.

Claims (1)

[Scope of utility model registration request] A horizontal burner and a liquid fuel atomization tank are each divided into two, and these divided burners and atomization tanks are communicated with each other, and an ultrasonic vibrator is provided at the bottom of each of the divided atomization tanks, A sheathed heater is provided in the split burner on the side closer to the atomization tank, and a burner thermometer is attached to the other split burner, and the burner thermo detects the combustible temperature of the other split burner. A combustion device characterized in that the burner thermo is connected to a control circuit configured to operate an ultrasonic vibrator.