JP2567768Y2 - 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 apparatus for burning liquid fuel, mainly kerosene.

[0002]

Conventionally, the liquid fuel is vaporized by the vaporizer, a liquid fuel burner of the formula burning with the vaporized fuel is ejected from the nozzle to the burner, the heat recovering heat of combustion in the burner The one provided with a recovery body is shown in Japanese Utility Model Publication No. 60-196.
No. 114 publication.

[0003]

In this case, in order to increase the amount of heat recovered by the heat recovery body, the heat recovery body must face a high temperature portion of the combustion section. There is a problem that the material of the heat recovery body is limited.

[0004] It is an object of the present invention to provide a liquid fuel combustion apparatus which solves such disadvantages.

[0005]

In order to achieve the above object, the present invention comprises a burner of the type in which liquid fuel vaporized by a vaporizer is ejected from a nozzle, supplied to a throat portion of the burner, and burned in a combustion portion. In a liquid combustion apparatus including a heat recovery body that transfers heat of a combustion portion of the burner to the nozzle portion, the heat recovery body faces an inner surface of an enclosure surrounding an outside of the combustion portion of the burner. One block and a second block having one end facing the outer surface of the wall and the other end facing the outside of the throat portion of the burner. The first block and the second block are integrally screwed with the surrounding wall interposed therebetween. The nozzle is fastened and fixed, and the nozzle is inserted and supported in an insertion hole provided at a position facing the outside of the throat portion of the second block.

[0006]

In the liquid fuel combustion apparatus having the above configuration, only the first block portion of the heat recovery body faces the combustion portion, so that only this portion may be made of a heat-resistant material, and the second block portion is An appropriate material can be selected.

Since the first block and the second block are integrally fastened and fixed with screws across the wall, the heat recovery body is fixed to the burner through the wall and provided on the second block. By inserting and supporting the nozzle in an insertion hole provided at a position facing the outside of the throat portion of the two blocks, the position of the nozzle with respect to the throat portion of the burner is also determined.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to the attached drawings.

In the drawings, reference numeral 1 denotes a liquid fuel combustion device. The liquid fuel combustion device 1 has a closed combustion chamber 5 which communicates with the outside only through a burner 2 and an exhaust pipe 4 provided downstream of a combustion section 3 thereof. Is provided. The burner 2 ejects the liquid fuel vaporized by the vaporizer 6 from a nozzle 9 facing outside an opening 8 connected to a throat portion 7 of the burner 2, sucks air with the ejected fuel, and burns the combustion unit 3. To burn. To explain this further, the burner 2 is evident from FIG.
The combustion part 3 is formed by attaching a ceramic plate 11 having a large number of flame openings 11a to the upper part of a circular burner main body 10,
In addition, a slit plate 12 is provided in the burner main body 10, a pressure equalizing chamber 13 is formed above the slit plate 12, and a throat plate 14 in which a throat portion 7 is formed to bulge is formed on the lower surface of the burner main body 10. Was configured. Reference numeral 15 denotes a heat shield plate provided so as to cover the lower portion of the burner 2 including the throat portion 7. Reference numeral 16 denotes a support cylinder that supports the burner 2. The burner 2 is supported at a lower portion of the support cylinder 16 via an annular support frame 19. The space below the support frame 19 was defined as an air chamber 18 connected to the fan 17.

The support frame 19 is provided with a surrounding wall 20 surrounding the outer periphery of the burner 3 of the burner 2, a secondary air hole 24 is provided on the upper surface of the surrounding wall 20, and a pseudo upper end of the supporting cylinder 16 is provided. The combustion chamber 5 was formed between the upper part of the burner 2 and the roastle 21 by supporting the roastle 21 on which the firewood 21a was placed.

On the upper part of the support tube 16, the pseudo firewood 2 is placed.
1a is provided with a transparent cylindrical body 22 so that the pseudo-firewood 21a glowing red by the heat of combustion in the combustion part 3 can be seen from the outside,
Further, a heat exchanger 23 is mounted on the upper part of the cylindrical body 22, and the combustion exhaust gas is discharged outside the room via the heat exchanger 23 and the exhaust pipe 4 connected thereto.

Reference numeral 25 denotes a heat recovery unit facing the combustion unit 3 of the burner 2. The heat recovery unit 25 has a first block 25 a facing the inner surface of the enclosure 20 and one end facing the outer surface of the enclosure 20. A second block 25b whose end faces the outside of the opening 8 of the burner 2 is formed. The first block 25a and the second block 25b are integrally fastened and fixed by screws 26 with the surrounding wall 20 interposed therebetween. Burner 2 of the second block 25b
An insertion hole 27 is provided at the other end facing the outside of the opening 8;
The nozzle 9 is inserted and supported in the insertion hole 27, and the nozzle 9 is heated and heated by the heat recovery body 25 to prevent the fuel vaporized in the nozzle 9 from being reliquefied.

To explain this further, the first block 2
5a is made of heat-resistant stainless steel or the like, and the second block 25b is made of copper or the like having good heat conductivity and good workability. The nozzle 9 was efficiently supplied.

As shown in FIG. 5, the heat recovery body 25 has a pair of left and right projections 25a-1 on the back of the first block 25a, and the concave 25 on the front of the second block 25b.
b-1 is provided, and after the projection 25a-1 is fitted into the recess 25b-1 through the through hole 20a provided in the surrounding wall 20,
If the screws 26 are integrally tightened and fixed, the first
The block 25a and the second block 25b can be positioned and the first block 25a to the second block 25b can be positioned.
Better heat transfer to the device.

As shown in FIG. 4, the vaporizer 6 has a structure in which a fuel passage 6b is formed in a metal block 6a and an electric heater (not shown) is embedded along the fuel passage 6b. The fuel passage 6b in the metal block 6a
Is connected to a supply path 28 connected to the nozzle 9 and the other end is connected to a fuel tank 29.
Is vaporized while passing through the vaporizer 6 and is ejected from the nozzle 9.

In the supply passage 28 connecting the fuel tank 29 and the nozzle 9, a constant level unit 30 is interposed, and the fuel in the constant level unit 30 is pumped up by a pump 31 so that the vaporizer 6 Side.

A return passage 32 is connected to the rear end of the nozzle 9. The return passage 32 is slightly raised on the nozzle 9 side so that the liquefied fuel does not flow from the nozzle 9.

Numeral 33 designates a valve seat 3 provided at a front end thereof with a stopper 32a which enters the nozzle 9 and closes the nozzle 9 and is provided at a rear end of the return passage 32.
2a shows an electromagnetically actuated valve rod provided with a valve 33b which abuts on the return passage 32 so as to abut the return passage 32.
4, the nozzle 9 was closed, and the valve 33b was closed when electricity was supplied.

Thus, at the start of combustion and at the end of combustion, the valve rod 32 is moved to the left, the nozzle 9 is closed with the plug 32a, and the valve 33b is separated from the valve seat 32a. The fuel is returned to the constant level unit 30 through the return passage 32 until the fuel is completely vaporized in 6, and the liquid state fuel and the vaporized state fuel remaining in the vaporizer 6 are determined at the end of combustion. It was returned to the liquid level unit 30.

Reference numeral 35 denotes a frame rod for detecting combustion in the combustion section 3.

The illustrated combustion apparatus is of a type in which air is supplied from a room to a burner 2 by a fan 17 and exhaust gas is discharged to the outside through an exhaust pipe 4. Needless to say, the present invention can also be applied to a combustion device of the type that discharges outdoors. Next, the combustion of the liquid combustion device will be described.

Prior to the combustion, the carburetor 6 is energized to heat the carburetor 6, and then the pump 31 is driven to feed the fuel to the carburetor 6.

Then, the fuel starts to be vaporized in the vaporizer 6.
Therefore, when the electromagnetic coil 33c of the electromagnetically actuated valve rod 33 is energized, the valve rod 33 moves rightward to open the nozzle 9. Therefore, the vaporized fuel is ejected from the nozzle 9 and the air is sucked along with the ejection. Therefore, the vaporized fuel and air are mixed in the distribution chamber 13, and a large number of flame holes 1 of the ceramic plate 11 are formed.
1a flows out to the combustion chamber 5 side. If this is ignited by an igniter (not shown), combustion starts.

The heat recovery body 25 is heated by the combustion, and the heat transferred by the heat recovery body 25 causes the nozzle 9 to be heated.
Heat and heat the part. This prevents the fuel vaporized at the nozzle 9 from being liquefied at the nozzle 9.

In the above-described embodiment, the burner 2 and the closed combustion chamber 5 connected to the outside only through the exhaust pipe 4 provided downstream of the combustion section 3 have been described. It is needless to say that the present invention can also be applied to a liquid combustion apparatus of a type in which the combustion section 3 is opened to discharge exhaust gas into the room.

[0026]

In the liquid fuel combustion device having the above-described structure, only the first block portion of the heat recovery body faces the combustion portion. Heat can be picked up, the amount of heat feedback by the heat recovery body increases, and the second block portion can be made of an appropriate material in consideration of conductivity, workability, and the like. Since the first block and the second block are integrally fastened and fixed with screws across the wall, the heat recovery body is fixed to the burner via the surrounding wall,
By inserting and supporting the nozzle in the insertion hole provided at a position facing the outside of the throat portion of the second block, the position of the nozzle with respect to the burner is also determined, and the assembling becomes extremely simple.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of the present invention.

FIG. 2 is an enlarged sectional side view of a main part.

FIG. 3 is a diagram showing a line II-II in FIG.

FIG. 4 is a side view of a vaporizer.

FIG. 5 is an enlarged cutaway plan view of a main part of another embodiment.

[Description of Signs ] 2 Burner 3 Combustion Unit 6
Vaporizer 7 throat part 9 nozzle 20
Enclosure wall 25 Heat recovery body 25e First block 25b
Second block 26 screw 27 insertion hole

Claims (1)

(57) [Scope of request for utility model registration] 1. A burner of a type in which liquid fuel vaporized by a vaporizer is ejected from a nozzle, supplied to a throat portion of a burner and burned in a combustion portion, and heat of the combustion portion of the burner is supplied to the nozzle portion. In a liquid combustion apparatus having a heat recovery body for transmitting heat, the heat recovery body is provided with a first block facing an inner surface of an enclosure surrounding the outside of a burner of the burner, and one end facing the outer surface of the wall and the other end. Is composed of a second block facing the outside of the throat portion of the burner, and the first block and the second block are integrally fastened and fixed with screws with the surrounding wall interposed therebetween, and at the outside of the throat portion of the second block. A liquid fuel combustion apparatus comprising the nozzle inserted and supported by insertion holes provided at opposing positions.