JPH09159112A - Vaporization type petroleum combustor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the burning damages above a vaporizer and a combustion chamber wall by the prevention of the circulation of a flame generated above a heat absorbing fin by disposing the burner port of a burner between the fins and providing a first air jet unit for injecting the part of the combustion air to the wall above the fins. SOLUTION: A flame formed in the large burner hole of the burner hole part of a burner provided between heat absorbing fins 31 is raised between the fins 31 to obtain an excellent heat back. Since the flame after the passage between the fins 31 is collapsed in the balance due to the abrupt change caused by a draft between the fins 31 and the decrease of the draft after the passage, the flame tends to circulate to a vaporizer 1 side above the fins 31. In this case, a first air jet unit 42 is formed at the upper part of the fins 31, and a part of the combustion air is injected. Accordingly, the flame which tends to be circulated is pushed back, normally raised toward upward, thereby making it possible to effectively prevent the damage of the vaporizer 1 above the fins 31 or a combustion chamber 37.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gasification type petroleum combustion apparatus equipped with a heating heater which constitutes a combustion section of a heater or a water heater.

[0002]

2. Description of the Related Art Conventionally, in this type, as disclosed in, for example, Japanese Patent Laid-Open No. 5-99405,
A plurality of endothermic fins are projected on the burner on the back of the carburetor, and during combustion, the heat of vaporization is obtained only by the heat back of the combustion heat from the endothermic fins, and the heating heater is not energized. It was intended to reduce power consumption.

[0003]

By the way, in this prior art, the flame whose air permeability is increased by raising the space between the heat absorbing fins is rapidly released above the heat absorbing fins.
There is a problem that the pressure balance is lost and a flame occurs around the upper side of the vaporizer, and the upper side of the vaporizer is heated and burned.

[0004]

The present invention focuses on this point and solves the above-mentioned drawbacks. In particular, the structure of the vaporizer has a heating heater and a mixed gas outlet at the bottom. A mixing chamber communicating with the outlet in the lower part of the vaporizer, a burner portion provided in the upper part of the mixing chamber on the rear side of the vaporizer, and an upper part that exposes the rear side of the vaporizer and surrounds the upper part of the burner part. In an open combustion chamber, a plurality of vertically elongated heat absorbing fins protruding above the burner portion are formed on the rear surface of the carburetor exposed in the combustion chamber, and between the heat absorbing fins. In addition to locating the flame hole portion of the burner portion, the combustion chamber wall above the heat absorbing fins is provided with a first air ejection portion for ejecting a part of the combustion air.

[0005]

After heating the heater 12 for heating and heating the vaporizer 1 to the set vaporization temperature, the combustion fan 46, the electromagnetic pump 48 and the like are driven, so that the fuel oil in the vaporizer 1 and the primary combustion gas are burned. When air is supplied, the fuel oil is vaporized to form a premixed gas, and this mixed gas flows into the mixing chamber 16 through the outlet 6 at the bottom, further promotes mixing there, and then separately in the burner section 23. It burns with the supplied secondary air.

A part of the combustion of the burner portion 23 is used for heat back, and the flame formed in the large flame hole 33 of the flame hole portion 24 provided between the heat absorbing fins 31 is generated. The flame after passing between the heat absorbing fins 31 is abrupt because the draft between the heat absorbing fins 31 and the draft after passing are decreased. To change the balance,
The flame tries to wrap around to the carburetor 1 side above the heat absorbing fins 31, but since the first air jetting portion 42 is formed in this upper part and a part of the combustion air is jetted, the flame trying to wrap around Is pushed back and normally rises upward, so that burnout of the carburetor 1 and the combustion chamber 37 above the heat absorbing fins 31 can be reliably prevented.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a vaporized oil combustion apparatus according to the present invention. Reference numeral 1 denotes a horizontal bowl-shaped vaporizer made of aluminum die-cast, the front surface of which is closed by a lid 4 having a fuel injection nozzle 2 and a primary air outlet 3 and is divided into two by a partition wall 5 at the bottom. An outlet 6 for the mixed gas is formed.

The carburetor 1 has an inner surface facing the fuel injection nozzle 2 formed perpendicular to the fuel injection nozzle 2 to form a vertical vaporization surface 7, and a portion where the fuel oil is sprayed has a uniform diffusion of the fuel oil. A flat surface 8 for measuring the fuel flow, and a plurality of beads 9 having different lengths are arranged around the flat surface 8 in a horizontal direction and in parallel with each other to form a meandering path 10 for the fuel oil flowing down. Is formed.

The flat surface 8 and the meandering path 10 each have one injection hole 11 formed on the left and right sides of the fuel injection nozzle 2. Are provided.

Reference numeral 12 denotes a U-shaped sheet cast in the vaporizer 1.
A heating heater composed of a heater protrudes from the upper side of the vertical vaporizing surface 7 toward the fuel injection nozzle 2 and protrudes slightly from below the vertical vaporizing surface 7 to cover the space above the vertical vaporizing surface 7. It is cast into the lower wall 14 forming the outlet 6.

Reference numeral 15 denotes a trapezoidal guide wall as viewed from a plane provided at the last end of the meandering path 10 of the carburetor 1, and a mixed gas formed in the carburetor 1 by the vaporized gas and the primary air for combustion. It is divided into two outlets 6 and guided smoothly.

Reference numeral 16 denotes an aluminum die-casting mixing chamber provided at the lower part of the vaporizer 1, which is connected to the outlet 6 and is depressed one step downward so as to rectify the mixed gas. And a plurality of gas chambers 19 which alternately communicate with the rectifying chamber 17 and are formed in a tapered shape and alternately have secondary air chambers 18 communicating downwardly therebetween.
7 has an auxiliary heater 2 formed of a U-shaped sheath heater at the bottom.
0 is cast, and is energized only for a predetermined time during preheating to preheat the mixing chamber 16.

A heat-resistant paint is applied to the inner surface of the mixing chamber 16 to form a coated surface 21 having fine irregularities, so that the flow velocity of the mixed gas is made uniform as the flow resistance of the mixed gas and the rectification is promoted. To measure.

A rectifying plate 22 is provided at the inlet of each gas chamber 19 so as to hang down from above. The rectifying plate 22 is formed by alternately forming cutouts and bent pieces on a single plate. / 6
Is closed from above, thereby suppressing the sending of wind power to the gas chamber 19 and forming a uniform flame as a whole.

Reference numeral 23 denotes a burner portion formed on the back side of the vaporizer 1 on the gas chamber 19 and the secondary air chamber 18 of the mixing chamber 16, and a convex flame hole fixed on the gas chamber 19. Part 24
And a secondary air supply unit 25 formed by a concave portion between the adjacent flame holes 24 and communicating with the secondary air chamber 18. At the top of the flame hole 24, it extends substantially from the center to the side wall. Elongated inverted L-shaped flame holes 26 are formed alternately on the left and right along the longitudinal direction. Further, a secondary air hole 27 communicating with the secondary air chamber 18 is formed at the bottom of the secondary air supply unit 25. The small holes formed in the flange portion 28 of the portion 24 are formed by overlapping, so that the distance from the flame hole 26 is secured and the rectification of the secondary air can be performed reliably.

Numeral 29 denotes a flame holding guide fixed to both sides of the flame hole portion 24, and an upper portion facing the flame hole 26 is bent obliquely upward on the opposite side to the flame hole 26 so as to be formed in the flame hole 26. It suppresses the spread of the flame and guides the secondary air supplied from below.

Reference numeral 30 denotes a heat-resistant rectifying mesh provided in the flame hole portion 24, which is formed by knitting a wire having a wire diameter of 0.29 mm into 36 mesh, and performs final rectification of the mixed gas ejected from the flame hole 26. Is what you do.

Numeral 31 denotes a vertically long heat absorbing fin protruding from the back of the vaporizer 1 onto the burner portion 23. The heat absorbing fin 31 is divided into a plurality of heat absorbing fins in order to increase the contact area with the combustion gas and increase the heat back amount. At the time of combustion, the heat back of the combustion heat is used as heat of vaporization to reduce the power consumption of the heating heater 12, and the upper end is formed as an inclined portion 32 inclined downward toward the burner portion 23 and raised. This is to improve the release of combustion heat.

Further, a flame hole portion 24 is disposed below each of the heat absorbing fins 31 so that the flame hole portion 24 between the heat absorbing fins 31 is about ten times as large as the other flame holes 26. Forming a large flame hole 33 consisting of two squares,
A single longitudinal groove 34 extending from the lower end to the upper end is provided substantially at the center of the protruding end surface of each heat absorbing fin 31.
The structure is such that the flame enters and the heat absorption area increases.

Reference numeral 35 denotes an L provided above the heat absorbing fin 31.
The heat-suppressing fins 31 are approximately 2
３ to cover the space between the heat absorbing fins 31 and the vertical groove 34 to suppress the rising force of the combustion heat rising between the heat absorbing fins 31. Alternatively, the suppression force may be adjusted by forming a slit or a hole in the suppression plate 35 itself.

Reference numeral 36 denotes an uneven surface formed by continuously forming a plurality of R-shaped convex portions on the back wall of the vaporizer 1 between the heat absorbing fins 31 to increase the heat absorbing area and control the rising force of the combustion heat. I am trying to get enough heat back,
In particular, because of the R shape, it is possible to smoothly suppress only the rising force without causing turbulence in the combustion heat.

Reference numeral 37 denotes a burner section 2 that exposes the back of the vaporizer 1.
3 is an open combustion chamber that surrounds the upper part of 3 and the outer circumference is an air chamber 3.
8 is covered with a cover frame 39, and the wall surface above the heat-absorbing fins 31 is closed by a plurality of first ejection holes 40 arranged at regular intervals and the front of the first ejection holes 40 is closed. A first air ejection portion 42 including an open first guide piece 41
Is provided, and secondary air is ejected into the combustion chamber 37 to prevent the flame from wrapping around.

Further, a lower portion of one side wall of the combustion chamber 37 facing the back of the carburetor 1 has a plurality of second
A second air ejection portion 45 including an ejection hole 43 and a second guide piece 44 that is closed at the front of the second ejection hole 43 and is open at the top.
Is provided, secondary air is ejected into the combustion chamber 37 to suppress the deviation of the flame and to prevent the one side wall from being burned by the air-caten effect.

Reference numeral 46 denotes a combustion fan, which communicates with the ejection port 3 and the air chamber 38 through an air passage 47, supplies primary air for combustion to the ejection port 3, and the air chamber 38 is provided to the side of the carburetor 1. Together with the secondary air supplied from the lower part of the mixing chamber 16 to the secondary air supply part 25 of the burner part 23 and the air ejection part 42,
Air for cooling the combustion chamber 37 is supplied.

Reference numeral 48 is an electromagnetic pump for supplying fuel oil to the fuel injection nozzle 2 through an oil feed pipe 49, and 50 is a heat shield plate.

Next, the operation of the embodiment of the present invention will be described. When the heater 12 for heating is energized to heat the carburetor 1 to a predetermined temperature, this is detected by a temperature sensor (not shown) provided at a proper position, and the combustion fan 46 and the electromagnetic pump 48 are detected.
The fuel oil is supplied to the carburetor 1 from the fuel injection nozzle 2 and the primary air for combustion is supplied to the carburetor 1 from the injection port 3.

In the carburetor 1, the fuel oil injected from the fuel injection nozzle 2 collides with the flat surface 8 of the vertical vaporization surface 7 and has no unevenness, so that it diffuses uniformly to the surroundings, but it does not fall immediately and the surroundings. There is also a wind force of the primary air supplied on the bead 9 and it sequentially moves along the meandering path 10, and a sufficient vaporization time is reached, vaporization is promoted, and it is supplied by the unevenness of the bead 9. The primary air also causes a turbulent flow and is sufficiently mixed with the vaporized gas, so that a good mixed gas can be obtained.

Therefore, a light and compact vaporizer 1 can be obtained by the vertical vaporization surface 7, a small and powerful combustion device can be obtained, and a sufficient mixed gas can be always formed without lowering the vaporization ability. It is a thing.

The vaporized gas vaporized on the vertical vaporizing surface 7 is
The primary air that collides with the vertical vaporizing surface 7 and rebounds flows in the horizontal bowl-shaped vaporizer 1 to the upper and lower side walls 13 and 14 provided with the heating heaters 12.
Since the heater 4 is sufficiently heated by the heating heater 12, the vaporization of the vaporized gas is further promoted, and the primary air is also heated well. Does not flow out immediately, but stays in the vaporizer 1 to a certain extent and after being sufficiently mixed, flows out from the outlet 6.

On the other hand, the mixed gas flowing out from the outlet 6 flows into the mixing chamber 16, which is heated for a certain time by the auxiliary heater 20 which is energized at the same time as the preheating of the vaporizer 1. Since the high temperature preheated state is maintained, the mixed gas that has flowed in does not liquefy.

Then, the mixed gas promotes rectification in the rectification chamber 17, and immediately immediately after being divided into a plurality of gas chambers 19 and finely divided, the mixed gas flows into the gas chambers. The ejection speed of the mixed gas ejected from the flame holes 26 of 24 is uniform irrespective of the longitudinal direction,
The mixed gas is rectified immediately before being ejected from the flame hole 26.
After passing through zero, it is finally rectified and ejected, and combustion is started if it is appropriately ignited by ignition means (not shown).

Between the heat absorbing fins 31 during combustion, the large flame holes 33 of the flame hole portion 24 are supplied with a large amount of the mixed gas and burn with a larger flame than the other flame holes 26, so that the heat absorbing fins 31 It is possible to obtain a good amount of heat back to some extent even at the time of small-power combustion in which a flame dedicated to the heat-back is formed. Further, at the time of large-power combustion, the flame formed in the large flame hole 33 Due to the spread, the flames enter the vertical grooves 34 of the adjacent heat absorbing fins 31 from both sides, and the flames pass through the vertical grooves 34 from the lower end to the upper end.
Since the endothermic area is substantially increased, a sufficient heat back amount can be obtained and good combustion can be performed even at the time of large thermal power combustion in which the vaporization amount increases.

Therefore, when the heat amount is not so large and the heat amount is small, it is possible to prevent the carburetor 1 from being melted due to an excessive amount of heat back, so that a large heat amount is required. Occasionally, the amount of heat back can be naturally increased by utilizing the spread of flame and the vertical groove 34, that is, the heat absorption area can be automatically increased or decreased in accordance with the heat power, and good vaporization can always be performed with optimal heat of vaporization. Good combustion is maintained and, of course, after the start of combustion, the heating heat
Therefore, it is possible to surely save power without the need to energize the power supply 12.

Further, the combustion heat rising between the heat-absorbing fins 31 during combustion and in the vertical groove 34 is suppressed in its upward force by the upper restraining plate 35, and is discharged obliquely upward from the inclined portion 32 at the upper end of the heat-absorbing fins 31. And therefore the ramp 3
2 and the restraining plate 35, the combustion heat is easily removed from between the inclined portion 32 and the restraining plate 35 without trapping the hot air between the heat absorbing fins 31 and in the vertical groove 34 and causing an abnormal heating state. By doing so, a good heat back amount is obtained while suppressing the rising force to some extent.

On the other hand, the flame rising between the heat-absorbing fins 31 undergoes a rapid change in combustion pressure above the heat-absorbing fins 31 and, as it goes around the restraining plate 35, the combustion chamber on the carburetor 1 side remains as it is. Although it is about to flow to the wall 37, the first air jetting portion 42 is provided here and a part of the secondary air is jetted out, so that it is pushed back and escapes to the upper side of the smoothe, and the upper side of the carburetor 1 is reached. Also, the risk of burning and burning the wall surface of the combustion chamber 37 is reliably prevented.

By installing a hot water supply heat exchanger (not shown) or the like in which water flows inside the combustion chamber 37, it is possible to obtain good hot water supply with low combustion noise and good responsiveness. Is.

[0037]

In summary, the present invention provides a vaporizer having a heating heater and a mixed gas outlet at the bottom, a mixing chamber communicating with the outlet at the bottom of the vaporizer, and an upper portion of the mixing chamber. Of the burner provided on the back side of the carburetor and the combustion chamber of the upper opening, which exposes the back side of the carburetor and surrounds the upper part of the burner, the vaporization exposed in the combustion chamber. A plurality of vertically elongated heat absorbing fins protruding above the burner portion are formed on the rear surface of the vessel, and the flame hole portion of the burner portion is located between the heat absorbing fins, and the combustion chamber above the heat absorbing fins is formed. Since the wall is provided with the first air jetting portion that jets out a part of the combustion air, the wraparound of the flame generated above the heat absorbing fins is prevented with an extremely simple structure, and the upper portion of the carburetor and the combustion chamber wall are prevented. It is possible to reliably prevent burnout.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a vaporized petroleum combustion apparatus according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the combustion chamber.

FIG. 3 is a sectional view of the burner.

FIG. 4 is an exploded perspective view of the burner portion.

FIG. 5 is an enlarged sectional view of the burner portion.

FIG. 6 is a front view of the vaporizer.

[Explanation of reference numerals] 1 vaporizer 12 heating heater 16 mixing chamber 23 burner portion 24 flame hole portion 31 endothermic fin 33 large flame hole 37 combustion chamber 40 first ejection hole 41 first guide piece 42 first air Gushing part

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hisashi Iso, 7-7 Higashishinpo, Sanjo City, Niigata Prefecture, inside Corona Co., Ltd. (72) Takahiro Kimura, 7-7 Higashishinbo, Sanjo City, Niigata Prefecture, inside Corona Co., Ltd.

Claims (1)

[Claims] 1. A vaporizer having a heater for heating and having a mixed gas outlet at the bottom, a mixing chamber communicating with the outlet at the bottom of the vaporizer, and a vaporizer rear side at the upper part of the mixing chamber. A burner portion provided in the combustion chamber and an upper open combustion chamber that exposes the rear side of the carburetor and surrounds the upper portion of the burner. -A plurality of vertically elongated heat absorbing fins protruding above the corners are formed, and the flame holes of the burner are located between the heat absorbing fins, and the combustion air is provided on the combustion chamber wall above the heat absorbing fins. A gasification type petroleum combustion device, characterized in that it is provided with a first air ejection part for ejecting a part of the above.