JPS593203Y2 - vaporization combustion device - Google Patents

Description

[Detailed description of the invention] The present invention unifies the fuel system in a vaporization combustion device equipped with a rotary gasification burner, improves starting characteristics, facilitates automatic switching to main combustion, and facilitates normal combustion operation. This invention relates to a new configuration that improves safety by cooling the furnace by post-purging after completion.

Liquid fuel such as white kerosene supplied from the oil pipe to the burner section is forcibly atomized by the rotation of the rotary burner, simultaneously heated and gasified, and then mixed with air to become combustion gas, which is then combusted. Combustion devices have become particularly important in recent years because they have the advantages of high combustion efficiency and cleaner exhaust gas.

Conventional combustion equipment of this kind uses the attached heat source only when gasifying the liquid fuel at the beginning of operation, and then uses the heat batter method to continuously gasify the liquid fuel by self-heating during combustion. However, this is because, for example, when a sheathed heater of about 300 W is used as a heating source, there is an economic problem in that if the heater is continuously energized during operation, the electricity cost will increase and the operating cost will increase. Ta.

However, this combustion device had various drawbacks as follows.

That is, as shown in FIG. 4, a portion for housing the annular sheathed heater 41 must be formed in the burner body having the vaporizing chamber 40, which increases manufacturing costs and makes replacement extremely difficult in the event of a wire breakage. Due to the structural disadvantages such as: However, there were drawbacks such as poor performance and failure to take into consideration the fact that the furnace was cooled during post-purging after the main combustion, and therefore improvements in these areas were strongly desired.

The present invention eliminates the drawbacks of the conventional device, simplifies the structure and unifies the fuel system, improves combustion starting characteristics, facilitates automatic switching to main combustion, and terminates main combustion operation. It was developed in an attempt to provide a new vaporization combustion device that improved safety by cooling the combustion furnace while performing post-purging.In particular, it was developed to replace the heater in the burner body with atomization using ultrasonic waves. At the time of startup, liquid fuel is finely atomized by ultrasonic vibration, and is efficiently sent to the air in the combustion air bypass passage, mixed with air in a rotating atomizer, and then electrically ignited in the burner nozzle. After the burner body is heated to a predetermined temperature by the combustion flame, the thermostat automatically switches the ultrasonic atomization to a scattering atomization method using a rotating atomizer to continue vaporization combustion. , both the startup and main combustion are performed efficiently using the same liquid fuel, and the thermostat stops the fan after the burner body is cooled while post-purging with combustion electricity even after the main combustion ends. It is characterized by

Hereinafter, the present invention will be explained in detail based on the accompanying drawings. In Figs. The electric motor 6 is housed in the third chamber and fixed to the partition plate 2, and its front and rear axes are rotatably pivoted by bearings 5.5 provided on the side partition plates 2 and 3. A turbo fan 9 is attached to the rear shaft that is supported and inserted into the fourth chamber, while a conical oil receiver is installed at the tip of the front shaft that passes through the second chamber and faces the first chamber. shaft 10 and rotating atomization plate 1
2a and a rotary atomizer 11 consisting of rotary atomizer blades 12b.

The motor insertion part of the partition plate 4 which is partitioned into a first chamber and a second chamber has an air passage hole 15 that can form a gap around the shaft, and the tip of the oil pipe 20 is inserted into the hole 15. The pipe is inserted through the pipe so that the end of the pipe faces the upper part of the oil receiving shaft 10 with an appropriate distance therebetween.

Reference numeral 14 denotes a burner body having a thick wall structure. A burner nozzle 13 having a flame port 16 is attached to the front part, and the inside of the body forms a vaporization chamber 14a. This burner body 14 is housed in the first chamber. The oil receiving shaft 10, the rotary atomizer 11, and the pipe end of the oil feed pipe 20 are covered, and the air passage hole 15 is
It is arranged so as to communicate with the second chamber via the partition plate 4 and is fixed to the partition plate 4.

The fourth chamber in which the turbo fan 7 is rotatably housed communicates with a feed cylinder 34 into which combustion air 33 is introduced;
The burner body 14 housed in the first chamber communicates with a combustion chamber 28 via the burner nozzle 13, and the combustion chamber 28 includes:
An electrode rod 27 for electrically igniting the burner nozzle 13 is disposed near the burner nozzle 16.

This combustion chamber 28 further passes through a heat exchanger 30 to an exhaust pipe 31.
The heat-exchanged exhaust gas 32 is preheated by exchanging heat with the air introduced into the supply cylinder 34 before being discharged.

Further, the rear side of the oil feed pipe 20 is pulled out from the burner casing 1, and connected to a fuel tank (not shown) via a solenoid valve 19, an oil amount regulator 18, and a cock 17 in this order.

Furthermore, the above-mentioned vaporization combustion device has an atomization chamber 2 forming a receiver.
1 is provided in a position close to the burner body 14, for example, on the outer periphery of the second chamber, and integrated with the burner casing 1,
The lower part of the atomization chamber 21 is branched from before the solenoid valve 19 of the oil supply pipe 24, oil amount regulator 18, solenoid valve 19, and oil supply pipe 20 system, which integrates the fuel supply system, to supply liquid fuel. The room 2
1, and the liquid is stored at a level equal to the predetermined liquid level maintained within the regulator 18, for example, about 20 m/m.

An ultrasonic vibrator 22 is removably attached to the bottom of the atomization chamber 21 so that the atomization energy generated by the vibrator 22 can be applied to the liquid fuel stored in the atomization chamber 21. Furthermore, a bypass passage 29 from the third chamber is opened into the indoor space above the liquid level, and a hole 25 of an appropriate size is provided in the burner casing 1, which also serves as the inner wall of the atomization chamber 21. By communicating with the second room,
The fuel atomized by the ultrasonic mover 22 is fed to the burner body 14 through the second chamber along with a portion of the combustion air in the third chamber and the air via the bypass path 29.

23 is an ultrasonic oscillator for emitting an output to the ultrasonic vibrator 22; 26 is a thermostat attached to the outer surface of the burner body 14 or the outer surface of the burner casing 1 on the outer periphery of the body 14; As is clear from the electric circuit shown in FIG. 3, the operation of the ultrasonic oscillator 23 is controlled by the thermostat 26.

In addition, in the figure, 35 is an oil amount control device attached to the oil amount regulator 18.

The combustion device having the above-mentioned structure is operated by the electric circuit shown in FIG. 3. To explain its operating state with reference to FIGS. 1 to 3, the power plug P is inserted into the outlet and the switch S1 is turned on. When turned on, the electric motor 6 rotates at a low speed and a weak wind is sent into the burner body 14 by the interlocking turbo fan 9.

At the same time, the ultrasonic oscillator 23 is supplied with power through the normally closed contact of the relay MR1, which is deenergized by the low-temperature contact of the thermostat 26, so that the ultrasonic vibrator 22 vibrates, causing the cock 17 and the oil amount regulator 18 to vibrate. Atomization chamber 21
The liquid fuel sent inside is finely atomized.

The atomized fuel vapor is sent to the burner body 14 by the air in the bypass passage 29 sent by the turbo fan 9 and the main stream air, and is stirred by the rotating atomizing blade 12 and vaporized.
The flame is blown out from the flame port 16 of the burner nozzle 13 into the combustion chamber 28 .

At the same time, the electrode rod 27 is energized via the step-down transformer Tr, so that the mixed gas is electrically ignited and combustion operation begins immediately.

The burner nozzle 13 and the burner body 14 are heated by the combustion flame at this time.

When the burner body 14 is heated to a predetermined temperature, the thermostat 26 turns off the ultrasonic oscillator 23 and the electric ignition circuit.

At the same time, the electromagnetic valve 19 is energized and opened by the closing of the normally open contact of Lu-MR1, and liquid fuel is sent from the oil pipe 20 to the oil receiving shaft 10.

Furthermore, the electric motor 6 is turned into a strong rotation H, and strong wind is sent into the burner body 14 by the turbo fan 9.

At the same time, the oil receiving shaft 10 and the rotary atomizer 11 are rotated strongly, and the liquid fuel is mechanically dispersed and atomized.

This atomized fuel hits the heated burner nozzle 13 and burner body 14, and gas is promoted in the high-temperature atomization chamber and is ejected from the burner nozzle 13, continuing the combustion operation within the combustion chamber 28.

As is clear from the above operating sequence, gasification at the start of operation is achieved by the ultrasonic atomization method that integrates the fuel supply system and eliminates the need for vaporization by heating, and the method that introduces the air into the vaporization chamber 14a together with the air in the bypass path 29. After the temperature of the burner body 14 has increased, the electromagnetic valve 1a is opened and the combustion is automatically switched to the rotary atomization method, which requires heating during operation, so that combustion can be carried out efficiently.

Therefore, combustion operation can be started as soon as the switch is turned on, and the self-heating generated by this combustion makes it possible to vaporize using the rotary atomization method.At the same time, by automatically switching to this method, the durability of the ultrasonic vibrator 22 is increased. You get it.

Further, by operating the switch S2 ON-OFF during operation, the oil supply amount of the oil amount control device 35 can also be controlled to a strong level of 0 or a little.

Further, even if the switch S1 is stopped, a series circuit of the thermostat 26 and the combustion air blowing motor 6 is provided between the switch S1 and the power source, so that the thermostat 26 will not operate until the temperature reaches a predetermined temperature or lower. Since the turbo fan 9 continues to rotate and blow air to cool the burner body 14 and perform a post purge to exhaust all the gas in the combustion chamber 28, safe restart is possible.

It goes without saying that if the thermostat 26 is opened at a temperature below a predetermined temperature, it will be completely shut down automatically.

The present invention has the above-mentioned structure and operation, and is a vaporization combustion device in which a rotary atomizer 11 is rotatably housed in a vaporization chamber 14a of a burner body 14, in which liquid fuel is stored at a constant liquid level. An atomization chamber 21, which is equipped with an ultrasonic vibrator 22 that imparts atomization energy to the stored fuel, is integrally provided in close proximity to the burner body 14, and a chamber above the liquid level is provided. A combustion air bypass passage 29 is opened in the internal space of the combustion air bypass passage 21 to communicate with the vaporization chamber 14a, and ultrasonic vibration is applied only during the start of operation, from the start of combustion operation until the vaporization chamber 14a is heated to a predetermined temperature by the flame. Since the ultrasonic transducer 22 is made to vibrate, the ultrasonic transducer 2
Due to the immediate action of 2, atomization is started immediately, and the atomized fuel is efficiently transferred to the vaporization chamber 14 by the air from the bypass path 29.
a, it is possible to vaporize and burn the fuel at the same time as the starting operation, and the responsiveness of starting is improved compared to conventional devices that use electric heaters.

Further, after the burner body 14 is heated after startup and reaches a predetermined temperature, the subsequent operation is performed by turning on the thermostat 25 attached to the outer surface of the burner body 14, so that the burner body 14 is branched from the liquid fuel supply pipe 24. A fuel supply system for the start of movement and subsequent operation is configured such that the electromagnetic valve 19 connected to the oil pipe 20 is opened, the liquid fuel is supplied to the rotary atomizer 11, and combustion is automatically switched to combustion by the rotary atomizer 11. By unifying the fuel system, it is possible to automatically switch from starting combustion to main combustion even though the fuel system is unified.

Further, at the end of the operation, the operation switch S is set to continue the rotation of the combustion air blowing electric motor 6 until the temperature of the burner body 14 becomes lower than a predetermined temperature and the thermostat 26 is opened.
1, the thermostat 26 and the electric motor 6
Since a series circuit is provided between the operation switch S□ and the power supply, until the burner body 14 reaches a predetermined temperature or lower,
The turbo fan 9 continues to rotate and blow air, and the burner body 1
4 and exhausts all the gas in the combustion chamber 28, and the chamber 28 is also cooled.
It has the feature of allowing safe re-operation.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional structural view of an example of the device of the present invention, FIG. 2 is a view along the line II-II in FIG. , FIG. 4 is a sectional view of a main part of a vertical combustion device. 11... Rotating atomizer, 14... Burner body, 19... Solenoid valve, 20... Oil pipe, 14 a... Vaporization chamber, 21...Atomization chamber, 22...Ultrasonic vibrator, 24...
・Supply pipe.

Claims (1)

[Scope of utility model registration request] In a vaporization combustion device in which a rotary atomizer 11 is rotatably housed in a vaporization chamber 14a of a burner body 14, an atomization chamber 21 is provided with an ultrasonic vibrator 22 that imparts atomization energy to the stored liquid fuel. is integrally provided in close proximity to the burner body 14, and a combustion air bypass passage 29 is opened in the interior space of the chamber 21 above the liquid level to communicate with the vaporization chamber 14a. 14a is heated to a predetermined temperature by the flame, the ultrasonic vibrator 22 is not excited, and the subsequent operation after the temperature of the burner body 14 has risen is such that the outer surface of the burner body 14 is The attached thermostat 26 opens the electromagnetic valve 19 connected to the oil feed pipe 20 branched from the liquid fuel supply pipe 24 to supply the liquid fuel to the rotary atomizer 11 so that the rotary atomizer 11 can The fuel supply system for the start of operation and the subsequent operation are integrated so as to automatically switch to combustion, and at the end of operation, the combustion air blowing electric motor 6 continues to rotate until the burner body 14 reaches a predetermined temperature or less. A vaporization combustion apparatus characterized in that a series circuit of the thermostat 26 and the electric motor 6 is provided between the power source and the operation switch S1 so as to make the operation switch S1 more effective.