JPH07217824A - Liquid fuel burner - Google Patents

Abstract

PURPOSE:To delete an assembling man-hours and number of components by simplifying a mounting structure of a vaporizing cylinder and a burner ring while reducing in size the entire burner in a liquid fuel burner in which the ring is mounted at the cylinder. CONSTITUTION:The liquid fuel burner comprises a cylinder 9 with a top provided in an air supply case 4 of a blower 1, an opening 14 opened substantially at a center of the top 9A of the cylinder 9, a vaporizing cylinder 22 assembled in the cylinder from the opening 14, and a burner head 24 provided with a burner port 23 at a peripheral wall and mounted at an end opening of the cylinder 22. A collar 29 is formed at a periphery of the end opening of the cylinder 22, and placed on the top 9A of the cylinder 9. A lower end flange 35 of a burner ring 26 disposed on an outer periphery of the head 24 is placed on the collar 29, and the lower end flange 36 of the ring 26 and the collar 29 of the cylinder 22 are clamped fixedly at the cylinder 9 via the same clamper 43.

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 a petroleum 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 a liquid fuel combustion apparatus of this type, for example, as disclosed in Japanese Patent Laid-Open No. 61-223416, a blower formed in a flat shape and a flat plane of a blower case of the blower are disclosed. A bottomless cylindrical portion and a vaporization cylinder having a burner head having flame holes in the peripheral wall at the tip opening, and the vaporization cylinder is fitted into the bottomless cylindrical portion from above. It is known that a vaporization cylinder is incorporated into a bottomless cylindrical portion to eliminate 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 the vaporizing cylinder provided with the burner head having the flame holes in the peripheral wall portion, in order to prevent the flame from spreading too much and to efficiently recover the heat of the flame to the vaporizing cylinder, It is necessary to dispose the burner ring on the outer circumference of the burner head.Therefore, in the past, the vaporization cylinder was fastened with a screw to a fixed part such as a bottomless tubular part, and the burner ring was vaporized with another screw. The structure in which the burner ring is attached to the upper part of the cylinder and the burner ring is assembled to the vaporization cylinder in this manner has a problem that the number of assembling steps and the number of parts are increased, resulting in an increase in cost.

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 overall size of the apparatus is reduced,
It is an object of the present invention to simplify the mounting structure of the vaporizing cylinder and the burner ring and to reduce the number of assembling steps and the number of parts.

[0005]

In the present invention, a blower,
A heavenly tubular part provided in the blower case of this blower,
An opening opened substantially in the center of the top surface of the tubular portion, a vaporization tube incorporated into the tubular portion from this opening, a flame hole provided in the peripheral wall portion, and a burner attached to the tip opening portion of the vaporization tube. A head is provided, and a flange is formed around the tip opening of the vaporization cylinder, and this flange is placed on the top surface of the tubular part, and on the flange the outer periphery of the burner head is provided. The lower end flange portion of the burner ring to be arranged is placed, and the lower end flange portion of the burner ring and the collar portion of the vaporization cylinder are fastened and fixed to the tubular portion through the same fastener.

Further, according to the present invention, a blower, a ceiling-shaped tubular portion provided in a blower case of the blower, an opening opened substantially in the center of the top surface of the tubular portion, and a tubular shape from this opening. And a burner head having a flame hole provided in the peripheral wall portion and attached to the tip opening of the vaporization tube, and forming a collar portion around the tip opening of the vaporization tube. , This collar is placed on the top surface of the tubular portion,
A lower end flange portion of a burner ring arranged on the outer circumference 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 vaporization cylinder are attached to the cylinder through the same fastener. The vaporization tube is fixed to the cylindrical section by fastening, and further, on the lower surface of the collar section of the vaporization tube, there is formed a projection engaged with a positioning small hole provided at an appropriate position on the top surface section of the tubular section.

[0007]

With this structure, the lower part of the vaporizing cylinder is inserted into the tubular portion through the opening, the collar portion is placed on the top surface portion of the tubular portion, and then the lower end flange of the burner ring is placed on the collar portion. The burner ring and the vaporization cylinder by attaching the lower part of the burner ring and the flange of the vaporization cylinder to the top surface of the cylindrical part with the same fasteners from above. Is easy.

In the liquid fuel combustion apparatus of claim 2,
On the lower surface of the collar portion of the vaporizing cylinder, since a projection that engages with a positioning small hole provided at an appropriate position on the top surface of the cylindrical portion is formed,
Since the vaporization tube is positioned and temporarily fixed, the vaporization tube is surely aligned, and the vaporization tube can be prevented from being displaced during the assembling work with the fastener.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings of FIGS. In the figure, 1 is a blower for supplying air for combustion, and this blower 1 is a motor 2
And a blower fan 3 made of synthetic resin driven by the motor 2.
And a blower case 4 accommodating the blower fan 3, and the blower 1 is formed in a flat shape and is supported by a motor case 5 also serving as a support base made of synthetic resin. , The air inlet 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 comprises a lower case 4A to which the motor 2 is fixed and which is attached to the upper surface of the motor case 5, and an upper case 4B combined with the lower case 4A. At the center of the upper surface of the case 4B, there is integrally press-molded a cylindrical portion 9 having a heavenly shape that stands upward.

Reference numeral 10 denotes an upper case 4 below the tubular portion 9.
The air distribution plate is assembled in B, and a circular concave portion 11 is formed at a substantially central portion of the air distribution plate 10 so as to project downward toward the blower fan 3. Outside the circular concave portion 11, a plurality of circular concave portions 11 are formed. (8 to 10) ventilation holes 12 are formed in a ring shape. Reference numeral 13 denotes a rotation speed detector for detecting the rotation speed of the blower fan 3. The rotation speed detector 13 penetrates the side wall of the upper case 4B so that its tip end faces the upper case 4B, and the detection portion is It is related to the peripheral portion of the blower fan 3.

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

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

The vaporization cylinder 22 is made of aluminum die casting, and a primary air supply port 27 communicating with the inside of the cylindrical portion 9 is formed in a part of the peripheral wall of the vaporization cylinder 22, and the upper end of the peripheral wall, that is, A vaporization electric heater 28 such as a sheath heater is embedded around the tip opening of the vaporization cylinder 22, and an annular collar portion 29 is formed to be placed on the top surface 9A of the tubular portion 9. Has been done. And this vaporization cylinder 22 is
As shown in FIG. 4, by incorporating the lower part of the peripheral wall having the primary air supply port 27 into the tubular portion 9 through the opening 14, the combustion air sent into the tubular portion 9 is supplied with the primary air. It is supplied as primary air via the mouth 27.

As shown in FIG. 1, the collar portion 29 has a plurality of (two in the embodiment) mounting boss portions 31, 31 having insertion holes 30, 30 corresponding to the burner mounting holes 18, 18.
And a plurality of holes (3 in the embodiment) that are engaged with the positioning small holes 15 and 15 are formed on the lower surface of the collar portion 29.
Positioning protrusions 32, 32 are provided downward. Further, as shown in FIGS. 2 and 4, the collar portion 29 has a plurality of heater chuck portion grooves formed by a chuck (not shown) that holds the vaporization electric heater 28 during die casting of the vaporization cylinder 22. 33, 33 are formed in a state in which only the upper surface is opened, and further, a concave groove 34 continuous with the upper surface and the left and right sides is formed in a part of the collar portion 29 of the lead-out portion of the vaporization electric heater 28. .

The burner ring 26 is the burner head 2
4 on the lower end of the annular wall 35 facing the flame holes 23, 23,
An outward-facing lower end flange portion 36 is formed on the flange portion 29 of the vaporization cylinder 22, and 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 is provided, and an upward turnback 39 is provided on the outer peripheral edge of the lower end flange portion 36. Reference numerals 40 and 40 denote a plurality of vertical slit-shaped notches provided in the upper portion of the annular wall 35.

Reference numeral 41 is an annular heat-insulating seal material interposed between the top surface portion 9A of the cylindrical portion 9 and the jaw portion 29 of the vaporizing cylinder 22, and this heat-insulating seal material 41 is the paragraph 16 described above. Is formed in a substantially same shape as the plane shape of the above, and is interposed in the paragraph portion 16, and as shown in FIG. 2, the positioning projections 32, 32 are inserted into the heat insulating seal material 41. A plurality of insertion holes 42, 42 are provided.

Reference numerals 43 and 43 denote a plurality of mounting screws, and both the lower end flange portion 36 of the burner ring 26 and the jaw portion 29 of the vaporizing cylinder 22 are provided at the lower end flange portion 36.
Is fastened and fixed to the top surface portion 9A of the tubular portion 9 from above from above via the common screws 43, 43.

Reference numeral 44 denotes a plurality of screws (not shown) on the top surface portion 9A of the cylindrical portion 9 outside the secondary air holes 17, 17.
And the burner stand 44 has a tubular portion 44A and the tubular portion 44A.
An outward upper flange portion 44B is formed on the upper end portion of A, and as shown in FIG. 4, a part of the flange portion 29 is inserted into a drawer notch 45 provided in a part of the cylindrical portion 44A. , Both ends of the vaporizing electric heater 28 are connected to the burner stand 4
4 is pulled out. At this time, the peripheral edge of the pullout notch 45 is inserted into the groove 34.

Reference numeral 46 is a frame rod, 47 is a spark plug, 48 is a fuel nozzle for supplying liquid fuel (kerosene) into the vaporizing cylinder 22, and this fuel nozzle 48 is a fuel tank via an oil feed pipe 49 and a fuel pump 50. It communicates with 51. Reference numeral 52 is a cartridge tank for supplying fuel to the fuel tank 51. Further, 53 is a blower duct assembled on the upper flange portion 44B of the burner stand 44, and 54 is a combustion cylinder.

In the above structure, the vaporization electric heater 2 is used.
When the vaporization cylinder 22 rises above the vaporizable temperature of the liquid fuel by energizing 8, the blower 1 starts operation, and the rotation of the blower fan 3 of the blower 1 causes air to pass through the filter 6 and the air suction port 7 Into the motor case 5 from
It is sucked into the blower case 4. The air sucked into the blower case 4 is blown into the tubular portion 9 through the ventilation holes 12 of the air distribution plate 10 substantially uniformly over the entire circumference of the tubular portion 9, and is fed into the tubular portion 9. Part of the air passes through the primary air supply port 27 and is supplied as primary air into the vaporization cylinder 22.

Here, when the fuel pump 50 starts to operate, the liquid fuel in the fuel tank 51 is pumped up by the fuel pump 50, passes through the oil feed pipe 49, is jetted from the fuel nozzle 48, and is supplied into the vaporization cylinder 22. It This vaporization cylinder 22
The liquid fuel supplied therein is instantly vaporized in the vaporization cylinder 22 and mixed with the primary air, and this mixed gas is sent into the burner head 24 through the passage of the diaphragm plate 25 and the flame holes 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 to start combustion.

On the other hand, the remaining air sent into the tubular portion 9 passes through the secondary air holes 17, 17 and is ejected as secondary air into the tubular portion 44A of the burner stand 44, and the tubular portion 44A.
It rises inside and is supplied to flame F, and promotes secondary combustion. Then, by controlling the rotation speed of the motor 2 and the oscillation speed of the fuel pump 50 to each other, the combustion amount is switched from strong to weak in multiple stages or in proportion.

Next, the assembly of the above 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 assembled in advance is placed, and the motor case 5 is fixed with screws or the like.
Attach to. Next, the upper case 4B of the blower 1 in which the air distribution plate 10 is previously attached with screws or the like is placed on the lower case 4A, and the both cases 4A and 4B are fastened with screws or the like to blow the blower. 1 is completed.

After that, a heat-insulating sealing material 41 is laid on the top surface portion 9A of the tubular portion 9, and after that, the opening 14 of the tubular portion 9 is formed.
The vaporizing cylinder 22 of the vaporizing burner 21 is fitted into the tubular portion 9 from the above. At this time, when the positioning projections 32, 32 of the vaporization tube 22 are engaged with the positioning small holes 15, 15 of the tubular section 9, respectively, the collar section 29 of the vaporization tube 22 causes the flange section 29 of the vaporization tube 22 to be placed on the top surface section 9A of the tubular section 9.
It is placed on the top, positioned, and temporarily fixed.

Next, the burner ring 26 is placed on the flange portion 29 of the vaporizing cylinder 22, and the hole 37 of the lower end flange portion 36 is inserted from above the lower end flange portion 36 of the burner ring 26.
And the mounting screws 43, 43 are inserted into the insertion holes 30 of the mounting boss portion 31 of the vaporization cylinder 22.
By assembling the tip ends of 3, 43 into the burner mounting holes 18, 18 of the tubular portion 9, the assembling of the vaporizing cylinder 22 and the burner ring 26 is completed. Then, 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 this embodiment, the vaporizing cylinder 2 of the burner 21
Since 2 is directly incorporated in the blower case 4 of the blower 1, the distance between the burner 21 and the blower 1 can be suppressed to a necessary minimum, and the blower 1 is formed in a flat shape. Not only can the entire device be made compact, but the lower end flange portion 36 of the burner ring 26 arranged on the outer periphery of the burner head 24 and the jaw portion 29 formed around the tip opening portion of the vaporization cylinder 22 are the same. Screw 43,
Since it is fastened and fixed to the tubular portion 9 via 43, the vaporization tube 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 thereof are reduced. , The number of screws can also be reduced.

On the lower surface of the collar portion 29 of the vaporizing cylinder 22,
A plurality of positioning small holes 2 provided in the top surface portion 9A of the tubular portion 9
Since the plurality of protrusions 32 and 32 that are engaged with 8 and 28, respectively, are formed, the vaporization cylinder 22 can be positioned and temporarily fixed, the vaporization cylinder 22 can be positioned accurately, and the screw 43 is provided. The vaporizing cylinder 22 can be prevented from being displaced during the assembling work by, and the workability is improved.

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

Further, in the collar portion 29 of the vaporizing cylinder 22, a plurality of heater chuck portion grooves 33, 33 formed by a chuck (not shown) for gripping the vaporizing electric heater 28 at the time of die casting are opened only on the upper surface. Since the heater chuck portion grooves 33, 33 are closed by the burner ring 26 and are excessively formed through the heater chuck portion grooves 33, 33, the heater chuck portion grooves 33, 33 are closed. Air can be prevented from being supplied inside the burner ring 26.

In the above embodiment, the tubular portion 9 is integrally press-molded on the upper case 4B of the blower 1, but the air distribution plate 10 is integrally press-molded on the upper case 4B to form the tubular portion. 9 is molded separately from the upper case 4B to form the upper case 4B.
You may make it connect with the upper surface part of.

[0032]

Since the present invention is constructed as described above, not only can the entire apparatus be made compact, but in a liquid fuel combustion apparatus in which a burner ring is attached to the vaporization cylinder, the vaporization cylinder and the burner ring are the same. The fasteners can be fixed at the same time, which simplifies the mounting structure.
The vaporization cylinder and the burner ring can be easily mounted, the number of parts and the number of mounting steps can be reduced, and the liquid fuel combustion apparatus can be easily assembled and is inexpensive.

Further, in the liquid fuel combustion apparatus according to the second aspect, the vaporization cylinder can be positioned and temporarily fixed, the vaporization cylinder can be surely aligned, and the vaporization cylinder and the burner ring can be secured by the fastener. It is possible to prevent the vaporization cylinder from shifting during the mounting work, further improving the assembly workability.

[Brief description of drawings]

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

FIG. 2 is likewise an exploded perspective view of a main part.

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

FIG. 4 is an enlarged cross-sectional view of an essential part of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Blower 4 Blower case 9 Cylindrical part 9A Top surface part of a cylindrical part 14 Opening 15 Small hole for positioning 22 Vaporizing cylinder 23 Flame hole 24 Burner head 26 Burner ring 29 Collar part 32 Positioning projection 36 Lower end flange part 43 of burner ring 43 Mounting screws (fasteners)

Claims (2)

[Claims] 1. A blower, a ceiling-shaped tubular portion provided in a blower case of the blower, an opening opened substantially in the center of the top surface of the tubular portion, and an opening formed in the tubular portion through the opening. A vaporization cylinder and a burner head provided with a flame hole in the peripheral wall portion and attached to the tip end opening of the vaporization cylinder, forming a flange around the tip opening of the vaporization cylinder, and forming the flange. Is placed on the top surface portion of the tubular portion, the lower end flange portion of the burner ring arranged 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 vaporization tube are placed. A liquid fuel combustion apparatus characterized in that the brim portion is fastened and fixed to the tubular portion via the same fastening tool. 2. A blower, a ceiling-shaped tubular portion provided in a blower case of the blower, an opening opened substantially in the center of a top surface portion of the tubular portion, and an opening provided in the tubular portion through the opening. A vaporization cylinder and a burner head provided with a flame hole in the peripheral wall portion and attached to the tip end opening of the vaporization cylinder, forming a flange around the tip opening of the vaporization cylinder, and forming the flange. Is placed on the top surface portion of the tubular portion, the lower end flange portion of the burner ring arranged 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 vaporization tube are placed. The collar and the collar are fastened and fixed to the tubular portion through the same fastener, and further, on the lower surface of the collar of the vaporization tube, there is a positioning small hole provided at an appropriate position on the top surface of the tubular portion. A liquid fuel combustion apparatus, characterized in that projections to be engaged are formed.