JP2828893B2 - 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 used for an oil fan heater or the like, and more particularly to a liquid fuel combustion apparatus in which a vaporizing cylinder is incorporated in a tubular portion of a blower.

[0002]

2. Description of the Related Art As this type of liquid fuel combustion apparatus, for example, as disclosed in Japanese Patent Application Laid-Open No. 61-223416, a flat blower and a flat surface of a blower case of the blower are disclosed. And a vaporizing cylinder in which a burner head having a flame hole in a peripheral wall portion is attached to a front end opening portion, and the vaporizing cylinder is inserted from above into the bottomless cylindrical portion. It is known that a vaporizing pipe is incorporated in a bottomless cylindrical portion, thereby eliminating the need for a pipe for an air passage, thereby reducing the size of the entire apparatus and reducing the number of assembly steps.

[0003]

However, in a vaporizing cylinder provided with a burner head having a flame hole in the peripheral wall, in order to prevent the flame from spreading too much and to efficiently recover the heat of the flame into the vaporizing cylinder, It is necessary to arrange a burner ring on the outer periphery of the burner head.For this reason, conventionally, the vaporizing cylinder is fastened to a fixed part such as a bottomless cylindrical part with a screw, and the burner ring is vaporized using another screw. In the case where the burner ring is attached to the upper portion of the cylinder and the vaporizer is attached to the vaporizing cylinder, the number of assembly steps and the number of parts are increased, and the cost is increased.

The present invention has been made in view of the above circumstances, and in a liquid fuel combustion apparatus in which a burner ring is attached to a vaporizing cylinder, the size of the entire apparatus is reduced.
An object of the present invention is to simplify the mounting structure of the vaporizing cylinder and the burner ring, and to reduce the number of assembly steps and the number of parts.

[0005]

According to the present invention, there is provided a blower,
A heavenly cylindrical portion provided in a blower case of the blower,
An opening opened at substantially the center of the top surface of the cylindrical portion, a vaporizing cylinder incorporated into the cylindrical portion from the opening, and a burner provided with a flame hole in a peripheral wall portion and attached to a tip opening of the vaporizing cylinder. A head is provided, and a flange is formed around an opening at the tip of the vaporizing cylinder, and the flange is placed on the top surface of the tubular portion, and the flange is provided on the outer periphery of the burner head. The lower flange portion of the burner ring to be arranged is placed, and the lower flange portion of the burner ring and the flange portion of the vaporizing cylinder are fastened and fixed to the tubular portion via the same fastener.

Further, in the present invention, a blower, a heavenly cylindrical portion provided in a blower case of the blower, an opening opened substantially at the center of a top surface portion of the cylindrical portion, and a cylindrical shape extending from the opening. A vaporizing cylinder incorporated in the part, a flame hole is provided in the peripheral wall portion, and a burner head attached to the distal opening of the vaporizing cylinder is provided, and a flange is formed around the distal opening of the vaporizing cylinder. , Placing the flange on the top surface of the tubular portion,
A lower end flange portion of a burner ring disposed on the outer periphery of the burner head is placed on the flange portion, and the lower end flange portion of the burner ring and the flange portion of the vaporizing cylinder are connected to the cylinder via the same fastener. A projection is formed on the lower surface of the flange portion of the vaporizing cylinder, the projection being engaged with a positioning small hole provided at an appropriate position on the top surface of the cylindrical portion.

[0007]

With this configuration, the lower end of the burner ring is placed on the flange after the lower part of the vaporizing cylinder is inserted into the cylindrical part from the opening and the flange is placed on the top surface of the cylindrical part. The burner ring and the vaporizing cylinder are attached from above by attaching the lower end flange of the burner ring and the flange of the vaporizing cylinder to the top surface of the cylindrical part with the same fastener from above. Is simplified.

[0008] In the liquid fuel combustion apparatus according to claim 2,
Since a projection is formed on the lower surface of the flange portion of the vaporizing cylinder, the projection is engaged with the positioning small hole provided at an appropriate position on the top surface of the cylindrical portion.
Since the positioning and the temporary fixing of the vaporizing cylinder are performed, the positioning of the vaporizing cylinder is ensured, and the vaporizing cylinder can be prevented from shifting during the assembling operation by the fastener.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In the figure, reference numeral 1 denotes a blower for supplying air for combustion.
And a blower fan 3 made of synthetic resin driven by the motor 2
And a blower case 4 for accommodating the blower fan 3. The blower 1 is formed in a flat shape, and is supported by a synthetic resin support base / motor case 5. The air suction port 7 to which the filter 6 is attached is integrally formed, and the bottom plate 8 of the outer case is formed.
It is placed and fixed on top.

The blower case 4 includes a lower case 4A to which the motor 2 is fixed and attached to the upper surface of the motor case 5, and an upper case 4B combined with the lower case 4A. At the approximate center of the upper surface of the case 4B, an upwardly rising heavenly cylindrical portion 9 is integrally press-formed.

Reference numeral 10 denotes an upper case 4 below the cylindrical portion 9.
B, a circular recess 11 protruding downward toward the blower fan 3 is formed substantially at the center of the air distribution plate 10, and a plurality of circular recesses 11 are formed outside the circular recess 11. (8 to 10) ventilation holes 12, 12 are formed in an annular shape. Reference numeral 13 denotes a rotation number detector for detecting the rotation number of the blower fan 3, and the rotation number detector 13 penetrates the side wall of the upper case 4B so that its front end faces the upper case 4B. It is associated with the periphery of the blower fan 3.

As shown in FIG. 2, the cylindrical portion 9 has an opening 14 substantially at the center of the top surface portion 9A, and a plurality of (three in the embodiment) positioning holes are formed around the opening 14. A paragraph portion 16 having small holes 15 formed therein is formed. Further, around this paragraph portion 16, a plurality of (six in the embodiment) secondary air holes 17, 17 arranged in an annular shape, A plurality of (two in the embodiment) burner mounting holes 18 and 18 arranged at symmetrical positions, a plurality of (four in the embodiment) burner stand mounting holes 19 and 19 appropriately arranged, and one end And a plurality of (two in this embodiment) burner stand positioning projections 20, 20 disposed close to each other.

Reference numeral 21 denotes a vaporizing burner. The vaporizing burner 21 has a plurality of flame holes 23 on a side wall at an upper end opening of a bottomed cylindrical vaporizing cylinder 22 for vaporizing liquid fuel (kerosene). The burner head 24 is mounted via an aperture plate 25, and a burner ring 26 is arranged on the outer periphery of the burner head 24.

The vaporizing cylinder 22 is made of aluminum die-casting. A primary air supply port 27 communicating with the inside of the cylindrical portion 9 is formed in a part of the peripheral wall, and the upper end of the peripheral wall, ie, the upper end of the peripheral wall. Around the distal end opening of the vaporizing cylinder 22, an electric heater 28 for vaporization such as a sheath heater is buried, and an annular flange 29 is formed which is placed on the top surface 9A of the cylindrical part 9. Have been. And this vaporization cylinder 22
As shown in FIG. 4, by incorporating the lower part of the peripheral wall having the primary air supply port 27 into the cylindrical part 9 through the opening 14, the combustion air sent into the cylindrical part 9 is supplied with the primary air. It is supplied as primary air through port 27.

As shown in FIG. 1, the flange 29 has a plurality of (two in the embodiment) mounting bosses 31, 31 having through holes 30, 30 corresponding to the burner mounting holes 18, 18, respectively.
Are formed, and a plurality (3 in this embodiment) engaged with the positioning small holes 15, 15 is formed on the lower surface of the flange portion 29.
) Of the positioning projections 32 are projected downward. As shown in FIGS. 2 and 4, the flange 29 has a plurality of heater chuck groove formed by a chuck (not shown) that grips the electric heater 28 for vaporization when the vaporizing cylinder 22 is die-cast. 33, 33 are formed in a state where only the upper surface is opened, and furthermore, a concave groove 34 is formed in a part of the flange portion 29 of the drawn-out portion of the electric heater for vaporization 28 so as to be continuous with the upper surface and both left and right surfaces. .

The burner ring 26 includes a burner head 2
4 at the lower end of the annular wall 35 facing the flame holes 23, 23,
An outwardly directed lower end flange portion 36 is mounted on the flange portion 29 of the vaporizing cylinder 22. A hole 37 is formed in the lower end flange portion 36 so as to correspond to the insertion hole 30 of the mounting boss portion 31. A plurality of (two in the embodiment) mounting pieces 38,
38, and an upward turn 39 is provided on the outer peripheral edge of the lower end flange portion 36. Reference numerals 40, 40 denote a number of longitudinal slit-shaped notches provided on the upper portion of the annular wall 35.

Reference numeral 41 denotes an annular heat-insulating sealing material interposed between the top surface 9A of the tubular portion 9 and the jaw 29 of the vaporizing cylinder 22. As shown in FIG. 2, the positioning projections 32 are inserted into the heat-insulating sealing material 41 so that the positioning projections 32 are inserted therethrough. A plurality of insertion holes 42, 42 are provided.

Reference numerals 43, 43 denote a plurality of mounting screws. Both the lower end flange portion 36 of the burner ring 26 and the jaw portion 29 of the vaporizing cylinder 22 are connected to the lower end flange portion 36.
From above, it is fastened and fixed to the top surface 9A of the tubular portion 9 via these common screws 43, 43.

Reference numeral 44 denotes a plurality of screws (not shown) on the top surface 9A of the cylindrical portion 9 outside the secondary air holes 17, 17.
The burner stand 44 has a cylindrical portion 44A, and has a cylindrical portion 44A.
An upper flange portion 44B facing outward is formed at the upper end of A, and as shown in FIG. 4, a part of the flange portion 29 is inserted through a notch 45 for drawing provided in a part of the cylindrical portion 44A. The both ends of the electric heater 28 for vaporization are connected to the burner stand 4.
4 outside. At this time, the periphery of the cutout 45 is inserted into the groove 34.

Reference numeral 46 denotes a frame rod, 47 denotes an ignition plug, and 48 denotes a fuel nozzle for supplying liquid fuel (kerosene) into the vaporizing cylinder 22. The fuel nozzle 48 is connected to a fuel tank via an oil feed pipe 49 and a fuel pump 50. It communicates with 51. Numeral 52 is a cartridge tank for replenishing the fuel tank 51 with fuel. Reference numeral 53 denotes an air duct installed on the upper flange portion 44B of the burner stand 44, and reference numeral 54 denotes a combustion tube.

In the above configuration, the electric heater for vaporization 2
When the vaporizing cylinder 22 rises to a temperature equal to or higher than the vaporizable temperature of the liquid fuel due to the energization of the fan 8, the blower 1 starts operating. From inside the motor case 5,
It is sucked into the blower case 4. The air sucked into the blower case 4 is sent substantially uniformly over the entire circumference of the tubular portion 9 through the ventilation holes 12, 12 of the air distribution plate 10, and is sent into the tubular portion 9. Part of the air passes through the primary air supply port 27 and is supplied into the vaporization cylinder 22 as primary air.

When the fuel pump 50 starts operating, the liquid fuel in the fuel tank 51 is pumped up by the fuel pump 50, passes through an oil feed pipe 49, is ejected from a fuel nozzle 48, and is supplied into the vaporization cylinder 22. You. This vaporization cylinder 22
The liquid fuel supplied to the inside is instantaneously vaporized in the vaporizing cylinder 22 and mixed with the primary air, and this mixed gas passes through the passage of the throttle plate 25 and is fed into the burner head 24 to form the flame hole 23. , 23 and is ignited by the spark of the spark plug 47, forming a flame F on the side of the flame hole 23 and starting combustion.

On the other hand, the remaining air sent into the cylindrical portion 9 passes through the secondary air holes 17 and 17 and blows out as secondary air into the cylindrical portion 44A of the burner stand 44, and the cylindrical portion 44A
Then, the air is supplied to the flame F to promote the secondary combustion. By controlling the number of revolutions of the motor 2 and the number of oscillations of the fuel pump 50 mutually, the combustion amount is switched from strong to weak in multiple stages or proportionally.

Next, the assembly of the above-described liquid fuel combustion apparatus will be described. First, on the upper surface of the motor case 5,
The lower case 4A of the blower 1 in which the motor 2 and the blower fan 3 are previously mounted is placed, and the motor case 5 is screwed or the like.
Attach to Next, on the lower case 4A, the upper case 4B of the blower 1 in which the air distribution plate 10 is previously mounted with screws or the like is placed, and the two cases 4A and 4B are fastened with screws or the like. 1 is completed.

Thereafter, a heat-insulating sealing material 41 is laid on the top surface 9A of the cylindrical portion 9, and after that, the opening 14 of the cylindrical portion 9 is opened.
Then, the vaporizing cylinder 22 of the vaporizing burner 21 is fitted into the cylindrical portion 9. At this time, when the positioning projections 32, 32 of the vaporizing cylinder 22 are engaged with the positioning small holes 15, 15 of the cylindrical part 9, respectively, the flange part 29 of the vaporizing cylinder 22 becomes the top surface 9A of the cylindrical part 9.
It is placed on top, positioned and temporarily fixed.

Next, the burner ring 26 is placed on the flange 29 of the vaporizing cylinder 22, and from above the lower end flange 36 of the burner ring 26, a hole 37 of the lower end flange 36 is formed.
And the mounting screws 43, 43 are inserted through the insertion holes 30 of the mounting bosses 31 of the vaporizing cylinder 22.
By screwing the tips of 3, 3 into the burner mounting holes 18, 18 of the tubular portion 9, the assembly of the vaporizing cylinder 22 and the burner ring 26 is completed. Thereafter, the burner stand 44 is placed on the tubular portion 9 of the blower 1 and attached to the tubular portion 9 with screws or the like.

According to the present embodiment, the vaporizing cylinder 2 of the burner 21
2 is directly incorporated into the blower case 4 of the blower 1, the distance between the burner 21 and the blower 1 can be minimized, and the blower 1 is formed flat. Not only can the entire apparatus be made compact, but also the lower end flange portion 36 of the burner ring 26 disposed on the outer periphery of the burner head 24 and the jaw portion 29 formed around the front end opening of the vaporizing cylinder 22 can be made the same. Screw 43,
Since it is fastened and fixed to the cylindrical portion 9 via 43, the vaporizing cylinder 22 and the burner ring 26 can be simultaneously fixed by the same screws 43, 43, and accordingly, the number of mounting steps and the number of steps are reduced. , The number of screws can also be reduced.

On the lower surface of the flange 29 of the vaporizing cylinder 22,
A plurality of positioning small holes 2 provided on the top surface 9A of the cylindrical portion 9
Since a plurality of projections 32, 32 respectively engaged with 8, 28 are formed, the positioning and temporary fixing of the vaporizing cylinder 22 can be performed, and the positioning of the vaporizing cylinder 22 is ensured. During the assembling work, the vaporizing cylinder 22 can be prevented from shifting, and the workability is improved.

In the above embodiment, the blower 1
In the upper case 4B, a plurality of (8 to 10) ventilation holes 1 are provided.
Since the air distribution plate 10 in which the openings 2 and 12 are opened in an annular shape is assembled, the air from the blower fan 3 is sent substantially uniformly over the entire circumference in the cylindrical portion 9 and its flow is close to laminar flow. Therefore, air with little turbulence is fed into the vaporizing cylinder 22, the air supply state into the vaporizing cylinder 22 is stabilized, and the vaporizing burner 21 can be stably burned.

Further, a plurality of heater chuck grooves 33, 33 formed by chucks (not shown) for gripping the vaporizing electric heater 28 at the time of die casting are formed on the flange 29 of the vaporizing cylinder 22. The heater chuck grooves 33, 33 are closed by the burner ring 26, and excessive heat is generated through the heater chuck grooves 33, 33 because the upper and lower sides are formed in a state of being opened. Air can be prevented from being supplied to the inside of the burner ring 26.

In the above embodiment, the tubular portion 9 is press-formed integrally with the upper case 4B of the blower 1. However, the air distribution plate 10 is press-formed integrally with the upper case 4B, and the tubular portion 9 is formed. 9 is formed separately from the upper case 4B.
May be connected to the upper surface portion of the second member.

[0032]

Since the present invention is constructed as described above, not only can the entire apparatus be made compact, but also in a liquid fuel combustion apparatus in which a burner ring is attached to a vaporizer cylinder, the same vaporizer cylinder and burner ring are used. Can be fixed at the same time, the mounting structure can be simplified,
The vaporization cylinder and the burner ring can be easily attached, the number of parts and the number of installation steps can be reduced, and an inexpensive liquid fuel combustion apparatus with good assemblability can be obtained.

Further, in the liquid fuel combustion apparatus according to the second aspect, the positioning and temporary fixing of the vaporizing cylinder can be performed, the positioning of the vaporizing cylinder can be surely performed, and the vaporizing cylinder and the burner ring are fastened by the fastener. At the time of the mounting operation, the vaporizing cylinder can be prevented from shifting, and the assembling workability is further improved.

[Brief description of the drawings]

FIG. 1 is an enlarged sectional view of a main part of a liquid fuel combustion apparatus according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the main part.

FIG. 3 is an overall configuration diagram of the liquid fuel combustion device.

FIG. 4 is an enlarged sectional view of a main part of FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Blower 4 Blower case 9 Cylindrical part 9A Top surface part of cylindrical part 14 Opening 15 Small hole for positioning 22 Vaporization cylinder 23 Flame hole 24 Burner head 26 Burner ring 29 Flange part 32 Projection for positioning 36 Lower flange part of burner ring 43 Mounting screw (fastener)

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-6-42717 (JP, A) JP-A-5-312306 (JP, A) JP-A 5-223218 (JP, A) (58) Field (Int.Cl. ⁶ , DB name) F23D 11/40 F23D 11/10

Claims (2)

(57) [Claims] 1. An air blower, a heavenly cylindrical portion provided in a blower case of the air blower, an opening opened substantially at a center of a top surface portion of the cylindrical portion, and a blower incorporated into the cylindrical portion from the opening. A vaporizing cylinder, and a burner head provided with a flame hole in a peripheral wall portion and attached to a distal end opening of the vaporizing cylinder. A flange is formed around the distal end opening of the vaporizing cylinder. Is placed on the top surface of the tubular portion, and the lower flange portion of a burner ring placed on the outer periphery of the burner head is placed on the flange portion. A liquid fuel combustion device, wherein a flange portion is fastened and fixed to the tubular portion via the same fastening tool. 2. A blower, a heavenly cylindrical portion provided in a blower case of the blower, an opening opened at a substantially center of a top surface portion of the cylindrical portion, and a blower incorporated into the cylindrical portion from the opening. A vaporizing cylinder, and a burner head provided with a flame hole in a peripheral wall portion and attached to a distal end opening of the vaporizing cylinder. A flange is formed around the distal end opening of the vaporizing cylinder. Is placed on the top surface of the tubular portion, and the lower flange portion of a burner ring placed on the outer periphery of the burner head is placed on the flange portion. The flange and the flange are fastened and fixed to the cylindrical part via the same fastener.Furthermore, on the lower surface of the flange of the vaporizing cylinder, a positioning small hole provided at an appropriate position on the top surface of the cylindrical part is provided. A liquid fuel combustion device, wherein a projection to be engaged is formed.