JP2002206708A - Liquid fuel combustion device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stabilize combustion without causing a back fire phenomenon. SOLUTION: A gasification burner 13 has a gasifying cylinder 14 to gasify liquid fuel, and a throttle plate 15 (a flow rectifying member) is mounted on the upper end opening part of the gasifying cylinder 14. A partition plate 16 is situated on the inner wall of the gasifying cylinder 14 in a manner to cover a protrusion part 17 for fixing protruding internally and a mixing cylinder 19 is situated in a burner head 18. A burner head 18, the mixing cylinder 19, and the partition plate 16 are fastened together by a screw 20 and fixed at a protrusion part 17 for fixing of the gasifying cylinder 14. The partition plate 16 is formed in an L-shape, a vertical piece 16A has length reaching the bottom of the inner wall of the gasifying cylinder 14, and the upper end of the vertical piece 16A is bent approximately at right angles. An outer end is fastened together by the screw 20 through a mounting hole 16C formed in a horizontal piece 16B formed in an actuate state so that the upper end of the vertical piece makes contact wit the inner wall of the gasifying cylinder 14 and is fixed at the protrusion part 17 of the gasifying cylinder 14. The partition plate 16 is formed of a stainless heat resisting steel and heat resistant coating is applied on the surface thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a petroleum vaporizing liquid fuel combustion apparatus mainly used for a petroleum fan heater or the like.

[0002]

2. Description of the Related Art Generally, there are two types of kerosene which are commercially available in France as kerosene used in the above-mentioned liquid fuel combustion apparatus, and two types of kerosene have different vaporization states depending on the type of kerosene. That is, burning with the same vaporizing burner, on the other hand, results in excess air,
On the other hand, it tends to red fire. Therefore, it is difficult to set the combustion state so that both are good. Further, if there is a protrusion for fixing the burner head on the inner wall of the vaporizing cylinder, the mixing of the air and the vaporized kerosene is not good, and the combustion tends to be one-sided. For this reason, as disclosed in Japanese Patent Application Laid-Open No. 8-75118, it is known that a baffle plate is disposed immediately below a cylindrical portion of a diaphragm plate attached to an upper opening of a vaporizing cylinder to prevent one-sided burning.

[0003]

However, as described above, the provision of the baffle plate causes the vaporized gas in the vaporizing cylinder to stay and causes a flashback phenomenon in which the vaporizing cylinder burns in the vaporizing cylinder when the temperature of the vaporizing cylinder becomes high. However, there is a problem that the fire is extinguished on the way.

Therefore, an object of the present invention is to stabilize combustion without causing a flashback phenomenon.

[0005]

Means for Solving the Problems For this reason, the first invention provides
A vaporizing cylinder provided with an air supply port and a fuel nozzle on the peripheral wall, a cylindrical burner head provided with a flame hole on the peripheral wall, and being screwed and fixed to a protrusion formed by projecting the inner wall of the vaporizing cylinder inward. A liquid fuel combustion device comprising: an opening provided at a substantially central portion of the gas mixture in the vaporizing cylinder; and a rectifying member for guiding the mixed gas to the burner head through the mixing cylinder, so as to cover the projection of the vaporizing cylinder. Wherein a partition plate is provided.

According to a second aspect of the present invention, the partition plate has an L-shape, the vertical piece has a length reaching the bottom surface of the inner wall of the vaporizing cylinder, and the upper end of the vertical piece is bent at a substantially right angle. The horizontal piece thus formed is characterized in that its outer end face has an arc shape so as to contact the inner wall of the vaporization cylinder.

According to a third aspect of the present invention, a mounting hole is formed in a horizontal piece of the partition plate, and the partition plate is fixed to the vaporizing cylinder together with the burner head by the screw.

A fourth invention is characterized in that the partition plate is made of heat-resistant stainless steel and its surface is subjected to heat-resistant coating.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3, reference numeral 1 denotes a blower for supplying combustion air. The blower 1 includes a burner motor 2, a combustion fan 3 made of a synthetic resin turbofan driven by the motor 2, And a blower case 4 that accommodates the combustion fan 3.

The blower case 4 includes a lower case 5 through which the output shaft of the burner motor 2 is inserted, and an upper case 6 fixed to the lower case 5 with screws 7. Reference numeral 8 denotes a bottomed plate-shaped rectifying plate provided on the lower surface of the step portion 10 of the upper case 6, and a plurality of openings 9 at predetermined intervals.
Is set up on the side. An air suction port 12 in which a filter (not shown) is provided outside the support base 11 that supports the lower case 5 and the burner motor 2 is formed.

The upper case 6 is also a burner case to which the combustion air from the combustion fan 3 is supplied, and has an opening substantially at the center of the top surface 6A thereof. 14 is incorporated in the upper case 6.

The vaporizing burner 13 has a substantially bottomed cylindrical vaporizing cylinder 14 for vaporizing liquid fuel (kerosene), and a diaphragm plate 15 (rectifying member) is attached to the upper end opening of the vaporizing cylinder 14. Further, a partition plate 16 described later is arranged so as to cover a fixing projection 17 projecting inward from the inner wall of the vaporizing cylinder 14, and a horizontal plane portion is provided in a cylindrical burner head 18 provided with a plurality of flame holes on the peripheral wall. A mixing cylinder 19 having an opening is disposed. Then, the burner head 18 and the mixing cylinder 1 are
9 and the partition plate 16 are fastened together and fixed to the fixing projection 17 of the vaporizing cylinder 14.

Reference numeral 21 denotes a combustion ring made of a heat-resistant metal disposed on an outer peripheral portion of the burner head 18. An opening (shown in the figure) is formed in a positioning portion 22 which is provided at a predetermined interval in the upper end flat portion 14A of the vaporizing cylinder 14. In this state, the combustion ring 21, the carburetor 14 and the upper case 6 are fastened together by screws 23 and fixed integrally. Reference numeral 25 denotes a burner stand assembled to the top surface of the upper case 6, and a plurality of secondary air holes are opened together with the top surface 6A of the upper case 6 at the left portion in FIG. Reference numeral 26 denotes a rotation speed detector for detecting the rotation speed of the combustion fan 3.

The vaporizing cylinder 14 is made of a heat-resistant aluminum alloy of an Al—Mn system. A primary air port 30 is opened at the lower part of the peripheral wall of the vaporizing cylinder 14 as an air supply port. The combustion air in the burner case (upper case 6) is supplied into the carburetor 14 as primary air.

Reference numeral 31 denotes an electric heater for vaporizing liquid fuel (kerosene), which is embedded in the upper part of the peripheral wall of the vaporizing cylinder 14, and 32 is a detecting element such as a thermistor for detecting the temperature of the vaporizing cylinder 14. The temperature detector 32 has a distal end provided in a projection of the vaporizing cylinder 14 and inserted into an insertion groove (not shown), and the other end of the temperature detector 32 provided in the upper case 6. It is exposed to the outside through a hole provided in the peripheral side wall.

Reference numeral 33 denotes a fuel supply pipe which penetrates a through hole provided in the peripheral side wall of the upper case 6 and faces the inside of the vaporizing cylinder 14 from the primary air port 30 of the vaporizing cylinder 14. It comprises a needle-like fuel nozzle 34 having an injection port located in the vaporizing cylinder 14 and an oil feed pipe 35 fitted with the base of the fuel nozzle 34. The oil feed pipe 35 is connected to a fuel pump via a fuel pump (not shown). It communicates with a tank (not shown).

Next, a description will be given mainly with reference to FIGS. The partition plate 16 is disposed so as to cover the fixing projection 17 projecting inward from the inner wall of the vaporization cylinder 14, but has an L-shape, and has a rectangular shape along the fixing projection 17. The vertical piece 16A has a length that reaches the bottom surface of the inner wall of the vaporizing cylinder 14, and the upper end of the vertical piece 16A is bent substantially at right angles to the vertical piece 16A to abut on the inner wall of the vaporizing cylinder 14. As described above, the vaporizer cylinder 14 is fastened together with the burner head 18 and the mixing cylinder 19 by the screw 20 through the mounting hole 16C formed in the horizontal piece 16B having an arc-shaped outer end surface as described above. Is fixed to the fixing projection 17.

Note that the outer end of the horizontal piece 16B does not necessarily have to be in contact with the inner wall of the vaporizing cylinder 14, and the end of the horizontal piece 16B is the vaporizing cylinder 1.
4 may be placed on the portion forming the inner wall and contacted therefrom. That is, any structure that covers and covers the fixing projection 17 is sufficient.

The partition plate 16 is made of stainless steel heat-resistant steel, and the surface thereof is subjected to an organic and inorganic heat-resistant coating in the same manner as the inner surface of the vaporizing cylinder 14.

In the above configuration, the electric heater 3
When the temperature of the vaporizing cylinder 14 rises above the vaporizable temperature of the liquid fuel (kerosene) or more due to the energization to 1, the temperature detector 32 detects the temperature and the blower 1 starts operating. Therefore, the burner motor 2
As a result, the combustion fan 3 rotates, and the air passes through the support base 11 through the air suction port 12 and is sucked into the blower case 4. The air sucked into the blower case 4 is uniformly sent into the upper case 6 through the opening 9 of the current plate 8,
The primary air is supplied into the vaporization cylinder 14 through the primary air port 30.

As shown in FIG. 3, the primary air that has entered the vaporizing cylinder 14 contacts the inner wall at the far right of the vaporizing cylinder 14, and also contacts the vertical piece 16A of the partition plate 16 while rotating left. The air is supplied into the diaphragm plate 15 through the opening of the diaphragm plate 15 without being disturbed.

On the other hand, when the fuel pump starts operating, the liquid fuel in the fuel tank is pumped up by the pump,
The fuel is jetted from the jet port at the tip of the fuel nozzle 34 through the oil feed pipe 35 and supplied into the vaporization cylinder 14. The liquid fuel supplied into the vaporizing cylinder 14 is instantaneously vaporized on the inner wall of the vaporizing cylinder 14, is well mixed with the primary air flowing as described above, and does not stay in the vaporizing cylinder 14. The mixed gas enters the mixing cylinder 19 through the opening of the throttle plate 15 with a uniform concentration, and flows into the burner head 18 through the opening formed in the horizontal surface of the mixing cylinder 19. The fuel gas is squirted from a plurality of flame holes formed in the peripheral wall of 18, and is ignited by a spark of a spark plug (not shown).

The remaining air sent into the upper case 6 is supplied to the top surface 6A of the upper case 6 and the burner stand 25.
The secondary air passes through a plurality of secondary air holes and is ejected as secondary air into the burner stand 25 to rise and is supplied to the flame to promote secondary combustion. In this case, by controlling the number of revolutions of the burner motor 2 and the number of oscillations of the fuel pump mutually, the amount of combustion is switched from strong to weak in multiple stages or proportionally.

According to the embodiment described above, the vaporizing cylinder 14 provided with the primary air port 30 and the fuel nozzle 34 as the air supply port on the peripheral wall, and the flame wall provided on the peripheral wall, and the inner wall of the vaporizing cylinder 14 is inward. And a cylindrical burner head 18 fixed to the fixing projection 17 formed by projecting the screw 20 with a screw, and the mixed gas in the vaporizing cylinder 14 through an opening and a mixing cylinder 19 opened at a substantially central portion. In the liquid fuel combustion device provided with the throttle plate 15 (rectifying member) leading to the burner head 18, the partition plate 16 arranged so as to cover the fixing projection 17 of the vaporizing cylinder 14 is provided. The air flow in the cylinder 14 becomes good, and even if isoparaffin-based and normal paraffin-based kerosene are used as the liquid fuel,
Since the vaporized gas no longer stays in the vaporizing cylinder 14, the flashback phenomenon does not occur and the combustion is stabilized.

The partition plate 16 has an L-shape. The vertical piece 16A has a length reaching the bottom of the inner wall of the vaporizing cylinder 14, and the upper end of the vertical piece 16A is bent at a substantially right angle. Since the outer end surface of the horizontal piece 16B formed in this manner has an arc shape so as to abut on the inner wall of the vaporization cylinder 14, the fixing projection 17 can be securely covered and concealed, and the air inside the vaporization cylinder 14 can be removed. The combustion is stabilized because the flow is good without being disturbed.

Further, a mounting hole 16C is formed in the horizontal piece 16B of the partition plate 16, and the screw 20 is fixed together with the burner head 18 and the mixing cylinder 19 to the vaporization cylinder 14 together with the burner head 18 and the mixing cylinder 19. , Installation work is simplified.

The partition plate 16 is made of heat-resistant stainless steel, and the surface thereof is subjected to heat-resistant coating in the same manner as the inner surface of the vaporizing cylinder 14, so that combustion is stabilized.

Furthermore, although the embodiments of the present invention have been described above, various alternatives, modifications, or variations are possible for those skilled in the art based on the above description, and the various modifications described above may be made without departing from the spirit of the present invention. Inclusive of alternatives, modifications or variations of

[0029]

As described above, according to the first and second aspects of the present invention, the flow of air in the vaporizing cylinder is improved, the vaporized gas does not stay in the vaporizing cylinder, and a flashback phenomenon occurs. And the combustion stabilizes. According to the third aspect of the present invention, since the screw is fixed together with the burner head to the vaporizing cylinder with the screw, the mounting operation is simplified. According to the fourth aspect of the present invention, since heat-resistant stainless steel is used and its surface is subjected to heat-resistant coating, combustion is stabilized.

[Brief description of the drawings]

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

FIG. 2 is a perspective view of a vaporizing cylinder.

FIG. 3 is a plan view of a vaporizing cylinder in a state where a partition plate is arranged.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Blower 4 Blower case 6 Upper case 13 Vaporization burner 14 Vaporization cylinder 15 Throttle plate (Rectifying member) 16 Partition plate 16A Vertical piece 16B Horizontal piece 16C Mounting hole 17 Fixing projection 18 Burner head 19 Mixing cylinder 20 Screw 30 Primary air port 34 fuel nozzle

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yoichi Uchida 1 Otsukicho, Ashikaga-shi, Tochigi Sanyo Electric Air Conditioning Co., Ltd. F-term (reference) 3K052 AA04 AA10 AB08 EA02 EA06 EB02 GA04 GC01 GE04

Claims (4)

[Claims] 1. A vaporizing cylinder provided with an air supply port and a fuel nozzle in a peripheral wall, and a cylinder fixed to a projection formed by providing a flame hole in the peripheral wall and projecting an inner wall of the vaporizing cylinder inward. A liquid fuel combustion device comprising: a burner head having a shape of a circle; and a rectifying member that guides the mixed gas in the vaporizing cylinder to the burner head through an opening opened at a substantially central portion and a mixing cylinder. A liquid fuel combustion device, comprising a partition plate arranged to cover a part. 2. The partition plate has an L-shape, a vertical piece having a length reaching the bottom of the inner wall of the vaporizing cylinder, and a horizontal piece formed by bending an upper end of the vertical piece at a substantially right angle. The liquid fuel combustion device according to claim 1, wherein the outer end surface of the piece has an arc shape so as to contact the inner wall of the vaporization cylinder. 3. The vaporizer according to claim 1, wherein a mounting hole is formed in a horizontal piece of the partition plate, and the screw is fixed to the vaporizer cylinder together with the burner head by the screw. Liquid fuel combustion equipment. 4. The liquid fuel combustion apparatus according to claim 1, wherein said partition plate is made of heat-resistant stainless steel and its surface is subjected to heat-resistant coating.