JP2712893B2 - Liquid fuel combustion device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid fuel combustion device for atomizing liquid fuel by a rotating body and burning it.

[0002]

2. Description of the Related Art A conventional liquid fuel combustion apparatus has a structure as disclosed in, for example, Japanese Utility Model Laid-Open No. 81430/88. That is, as shown in the cross-sectional view of FIG. 2, a closed container-shaped burner main body 3 is constituted by the chamber 1 and the combustion tube 2 joined thereto. A support plate 30 having a plurality of through-holes 4 for passing the secondary air for combustion on the outer peripheral side and a through-hole 5 for passing the primary air for combustion at the center is attached to the joint of the burner body 3. . The donut-shaped burner body 7 is fixed to the support plate 30.
The rotating shaft 10 of the motor 9 is inserted into the burner body 7 from the chamber side through the through hole 5 of the support plate 30. A conical rotating body 1 is provided on a rotating shaft 10 in the burner body 7.
1 and a bottomed container-shaped mixing plate 31 are mounted to be rotatable in the burner body 7. A fuel pump 19 is provided at the small-diameter end of the rotating body 11 located at the base of the rotating shaft 10.
The fuel pipe 20 connected to the burner body 7 is provided.
A flame port plate 32 that forms a flame port is attached between the inner peripheral surface of the outer peripheral portion of the liquid crystal panel and the mixing plate 31.

In the liquid fuel combustion apparatus having the above structure, when power is supplied to a combustion blower (not shown), a motor 9 and an ignition heater 21, supply of combustion air is started, and the rotating body 1 is turned on.
1 and the mixing plate 31 rotate, and the ignition heater 21 glows red. When the fuel pump 17 operates and the liquid fuel is supplied from the fuel pipe 20 to the inclined surface of the rotating body 11, the liquid fuel sequentially reaches the large-diameter end of the rotating body 11, and the liquid fuel of the rotating rotating body 11 is rotated. It is atomized by centrifugal force and collides with the mixing plate 31 and collides with the burner body 7 while further atomizing, and flows out of the flame port of the flame port plate 32 along the inner peripheral surface of the burner body 7 by the blowing pressure of the combustion air. Then, it reaches the ignition heater 21 and is ignited.

[0004] The rotating mixing plate 31 forms a swirling flow around it. The ignited flame rides on the swirling flow and ignites over the entire inner peripheral surface of the burner body 7. As a result, the mixing plate 31 is heated, and the liquid fuel colliding with the mixing plate 31 starts to vaporize on the inner peripheral surface of the burner body 7 and is mixed with the primary air for combustion to reach the flame port plate 32 to form a stable flame. Will be done.

[0005] In the liquid fuel combustion apparatus having the above-described configuration,
In addition, there is a problem that soot is generated at the time of ignition. point
At the time of fire, large particles of fuel remaining without being ignited
When it reaches the vaporization temperature of the body fuel, it vaporizes and burns at once
Measures to prevent fuel from remaining.
Some have been done. For example, Japanese Utility Model Publication No. 55-145218
In the publication, a recovery ring surrounding the outer periphery of the rotating body is provided,
Connect the collection pipe to the discharge hole provided on the lower side of the collection ring and
To remove fuel remaining outside the
You.

[0006]

In [0007] Liquid fuel combustion apparatus of the above configuration, rotating rotary body 11 and only the temperature, such as the bearing of the motor 9 becomes a high temperature, gutter progress of degradation is faster <br/> Issues that need to be solved. It also leaves fuel
Complicated configuration for discharging so that it is troublesome to assemble
There is also a problem that the number of parts is large and the cost is high.
You.

The present invention has been made to solve such a conventional problem, and an object thereof is to provide a liquid fuel combustion apparatus.
Prevention of soot during fire with a simple configuration
Delays the progress of deterioration of rotating bodies and motor bearings due to heat.
It is to make it.

[0008]

In order to achieve the above object, the invention according to claim 1 is provided in a closed container-shaped burner body.
Arranged rotary body to be rotated by the motor to the provided burner within the body, Ru is burned in the burner body with combustion air by atomizing This rotation body liquid fuel supplied
About combustion apparatus, one series of depressions from the rotating body of the burner body to the inner circumferential in the outer peripheral direction of the position to which the fuel is scattered
Means are provided on the body, and one end of the fuel recovery pipe communicating with the outside near the lowermost portion of the dent is connected to the bottom of the dent so as to open .

[0009]

[0010] The invention of claim 2 in order to achieve the above object, attaching a rotating member in said means according to claim 1
And the base side away from the rotating member in the rotation axis of the motor
Combustion with spacing from the bearing that supports the rotating shaft with a spacer
Attach the exposed heat radiation fins to use air, on the tip side of the rotating body to adopt a means for mounting a large rotating plate outer diameter than the rotating body Nde clamping the insulation.

[0011]

SUMMARY OF] According to the means according to claim 1, the liquid fuel of larger particles that are blown from the rotating member is held in a look series of concave burner body, recessed from the bottom of the recess to flow down the concave body
The fuel is recovered by the fuel recovery pipe outside the burner body without remaining in the burner body, and the unburned liquid fuel does not remain in the burner body.

[0012]

According to the second aspect of the present invention, the heat transfer to the rotating body side is reduced by the heat insulator together with the function according to the first aspect, and the heat insulating body is separated from the rotating body and exposed to the combustion air.
And heat release by heat radiation fins are, interval by the spacer
The holding suppresses a rise in the temperature of the bearing of the motor.

[0014]

FIG. 1 is a sectional view of a liquid fuel combustion apparatus according to an embodiment of the present invention. In this liquid fuel combustion apparatus, a closed vessel-shaped burner main body 3 is constituted by a chamber 1 and a combustion cylinder 2 joined to the chamber. At the joint of the burner body 3, a plurality of through holes 4 for passing the secondary air for combustion from the chamber 1 side on the outer peripheral side, and an inlet 5 for passing the primary air for combustion from the chamber 1 side at the center, Further, donut-shaped burner bodies 7 each having a small hole 6 through which primary air for combustion from the chamber 1 side is provided at the bottom are mounted with a packing 8 interposed therebetween.

A rotary shaft 10 of a motor 9 is inserted into the burner body 7 from the chamber 1 side through the central inlet 5. A conical rotary body 11 and a disk-shaped rotary plate 12 having a larger outer diameter than the rotary body 11 are mounted on a rotary shaft 10 of a motor 9 in the burner body 7 so as to be rotatable in the burner body 7. The rotating plate 12 is mounted on the shaft end side of the rotating shaft 10, and an insulating ring 13 made of an insulating material is interposed between the rotating plate 11 and the rotating body 11. The rotation shaft 10 on the base side located on the chamber 1 side is separated from the rotating body and
Radiating fins 14 to rotate together with the rotary shaft 10 is attached to put spacer 15 to the motor 9 side at the inner.

A fuel recovery pipe 16 is connected to the burner body 7 at the lowest position in the assembled state.
The fuel recovery pipe 16 is drawn out to the outside through the chamber 1 and connected to a constant oil level unit 17. The inner wall of the burner body 7 facing the large-diameter end of the rotating body 11 has a ring-shaped channel 18 formed of a series of recesses in the outer peripheral direction.
Is formed so as to communicate with a connection portion with the fuel recovery pipe 16. A fuel pipe 20 is attached to the constant oil level unit 17 via a fuel pump 19, and the tip of the fuel pipe 20 is drawn into the chamber 1 so that liquid fuel can be supplied to the slope on the small diameter end side of the rotating body 11. I have. Further, an ignition heater 21 is provided near the inner wall of the burner body 7 and penetrates the burner body 7 and the chamber 1. Fuel port
The supply of liquid fuel by the pump 19 is particularly
Is a fuel supply that is less than approximately half the maximum combustion capacity of the combustion device.
Set to the amount.

In the liquid fuel combustion device having the above configuration,
Combustion blower (not shown), motor 9, ignition heater 2
When the power is turned on to 1, the supply of combustion air starts,
The rotating body 11 and the rotating plate 12 rotate, and the ignition heater 21 glows red. When the fuel pump 19 operates and the liquid fuel is initially supplied from the fuel pipe 20 to the slope of the rotating body 11 at a supply amount of substantially half or less of the maximum combustion capacity, the liquid fuel is supplied to the large-diameter end side of the rotating body 11. A rotating body 11 that has reached and rotated sequentially
Is atomized by the centrifugal force of the gas, and collides with the ignition heater 21 to be ignited. Since the swirling flow due to the rotation of the rotating plate 12 is formed in the burner body 7, the ignited flame rides on the swirling flow and ignites over the entire inner peripheral surface of the burner body 7.

As a result, the burner body 7 is heated and the liquid fuel colliding with the burner body 7 is vaporized on the inner wall surface of the burner body 7 or remains in a liquid state in the chamber 1.
Inside, the primary air for combustion spouted from the small holes 6 at the bottom of the burner body 7 is mixed and diffused by the swirling flow generated by the rotating plate 12, so that stable combustion is performed.

The large-diameter fuel particles that are not ignited at the time of ignition and remain as unburned components are small in quantity because liquid fuel is supplied at the time of ignition at a supply amount of substantially half or less of the maximum combustion capacity. If it exists, it is collected by the channel 18 and guided to the fuel recovery pipe 16, and is returned to the constant oil level device 17 sequentially and does not remain in the burner body 7. Therefore, no soot is generated when the large-diameter particles of the remaining fuel reach the vaporization temperature of the liquid fuel and evaporate and burn at once, and a large amount of unburned fuel is not generated at the time of ignition.
The situation that cannot be collected at the factory does not occur. Channel 18
Is recessed in the burner body 7 without using a separate member
Since it is integrally molded, it is easy to assemble and the configuration is simple.
You.

Further, the heat received by the rotating plate 12 from the flame is transmitted to the bearing side of the motor 9 via the rotating body 11, the rotating shaft 10, and the like. The heat insulating ring 13 and the spacer 15 are provided in the middle of the transmission path. And exposed to the primary air for combustion
Since the radiating fins 14 in the path are in the path, the temperature of the bearing of the motor 9 is prevented from becoming high and the progress of thermal deterioration is delayed. The heat insulating ring 13 suppresses a rise in the temperature of the rotating body 11, and the rotating body 11 is cooled by radiating heat to the liquid fuel and the primary air for combustion. Heat from the rotating body 11 to the motor 9 side is separated from the rotating body
The heat is radiated by the radiating fins 14 and the spacers 15, and the bearings of the motor 9 are protected from the heat, so that the reliability of the device is high.

[0021]

Above examples, according to the present invention As is clear from by description, according to the invention of claim 1, by a simple configuration in which only a series of concave body and the fuel recovery pipe that is not based on another member, the unburned liquid It is possible to prevent large-diameter particles of the fuel from remaining in the burner body, and it is possible to obtain a low-cost liquid fuel combustion apparatus with almost no generation of soot.

[0022]

According to the invention of claim 2, suppression <br/> by holding heat dissipation and spacing of the combustion air temperature rise in the temperature rise and motor bearings of the rotary body together with the effect according to claim 1 And the progress of thermal degradation of the components can be delayed, and the reliability of the device can be improved.

[Brief description of the drawings]

FIG. 1 is a sectional view of a liquid fuel combustion apparatus showing one embodiment of the present invention.

FIG. 2 is a cross-sectional view of a conventional liquid fuel combustion device.

[Explanation of symbols]

1 chamber, 2 combustion cylinders, 3 burners, 7 burners, 10 rotating shafts, 11 rotating bodies, 12 rotating plates, 13 heat insulating rings, 14 radiating fins, 16 fuel recovery pipes, 18 channels.

──────────────────────────────────────────────────の Continuation of front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display location F23D 11/04 612 F23D 11/04 612C 613 613E 621 621C (56) References JP-A-2-82006 (JP, A) JP-A-55-107817 (JP, A) JP-A-55-95008 (JP, A) JP-A-57-43107 (JP, A) 1979-69024 (JP, U) 1-81427 (JP, U) 1-123012 (JP, U) 55-145218 (JP, U)

Claims (2)

(57) [Claims] A rotator rotated by a motor is disposed in a burner body provided inside a closed container-shaped burner main body.
The liquid fuel supplied together with the air for combustion by atomized by the rotary member to a combustion device for burning within the burner body, the outer peripheral direction on the inner periphery of the position to which the fuel is scattered from the rotating body of the burner body integrated a series of dents to
And one end of a fuel recovery pipe communicating with the outside near the lowermost portion of the recess is connected to open at the bottom of the recess . 2. A rotating shaft of a motor having a rotating body attached thereto.
Bearing that supports the rotating shaft on the base side away from the rotating body
Heat radiation exposed to combustion air at a distance from the
Attach fins and insert a heat insulator on the tip side from the rotating body
2. The liquid fuel combustion apparatus according to claim 1, wherein a rotary plate having a larger outer diameter than the rotary body is mounted .