JP3210235B2 - Vaporized oil combustion equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gasoline-type oil combustion apparatus provided with a heating heater constituting a combustion section of a heater or a water heater.

[0002]

2. Description of the Related Art Conventionally, in this type, as disclosed in Japanese Patent Application Laid-Open No. 5-99407, for example,
Secondary air is circulated from both sides of the combustion chamber to cool the combustion chamber walls, and the cooled secondary air is divided into a plurality of paths from the opposite side of the carburetor to form a secondary air in the burner section. By supplying, it was always intended to obtain good combustion.

[0003]

By the way, in this conventional apparatus, secondary air is supplied to the burner section from the confluence of the secondary air flowing from both sides of the combustion chamber. Is supplied in a turbulent state due to collisions from
There is a problem that the flame to be formed is disturbed and good combustion cannot be obtained, and the mixing chamber for promoting the mixing of the vaporized gas and the primary air is heated only by heat conduction from the vaporizer and the burner. Therefore, there is also a problem that the vaporized gas is liquefied due to insufficient heat.

[0004]

The present invention focuses on this point and solves the above-mentioned drawbacks. In order to solve the above-mentioned drawbacks, the present invention particularly employs a carburetor having a heating heater and having a mixed gas outlet at the bottom. A mixing chamber communicating with an outlet at a lower portion of the vaporizer; a burner portion provided at a rear side of the vaporizer at an upper portion of the mixing chamber;
An upper open combustion chamber enclosing the upper part of the corner, comprising a cover frame that covers the vaporizer, the mixing chamber, and the combustion chamber via a predetermined interval through which secondary air for combustion flows,
Further, this predetermined interval is vertically divided into a combustion chamber side and a mixing chamber side by a partition plate, and the upper and lower sides are communicated only at the mixing chamber tip side opposite to the vaporizer, and air for cooling the combustion chamber flows above. The cooling channel is provided, and the lower portion is provided as a heat retaining channel through which the heated air having passed through the cooling channel flows and is supplied as secondary air to the burner from below the mixing chamber.

[0005]

After energizing the heating heater 12 to heat the carburetor 1 to the set vaporization temperature, the combustion fan 48 and the electromagnetic pump 50 are driven so that the fuel oil and the primary combustion gas are contained in the carburetor 1. When air is supplied, the fuel gas is vaporized to form a premixed gas. The mixed gas flows into the mixing chamber 16 from the outlet 6 at the bottom to further promote the mixing, and then burns in the burner 23. Is what you do.

In driving the combustion fan 48, air not supplied into the carburetor 1 is converted into secondary air from the outer periphery of the carburetor 1 to the cooling passages 46 on both sides of the outer periphery of the combustion chamber 37 first.
To cool the combustion chamber 37 to prevent burnout, and the secondary air, whose temperature has risen reversely after cooling, flows as it is to the lower heat retaining channel 47 to heat the mixing chamber 16 and maintain the heat retaining state. The mixture is smoothly supplied from the bottom of the mixing chamber 16 to the burner section 23 through the upper secondary air hole 27 so that good combustion can be obtained without turbulence.

[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 portion of the vaporizer 1, and a large-capacity rectification chamber 17 which communicates with the outlet 6 and is depressed one step downward so as to rectify the mixed gas. And a plurality of gas chambers 19 having alternately formed secondary air chambers 18 which communicate with the rectifying chamber 17 and are tapered and formed therebetween and communicate 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 meshes, 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 projecting from the back of the vaporizer 1 onto the burner portion 23, and is formed in a plurality of portions so as to increase the contact area with the combustion gas to increase the heat back amount. At the time of combustion, the heat back of 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 ascended. This is to improve the escape 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.
An upper open combustion chamber surrounding the upper part of the heat absorbing fin 31 is covered with a cover frame 38 at a predetermined interval, and a plurality of first rows arranged at regular intervals on the wall surface above the heat absorbing fin 31.
A first air ejection portion 41 is provided which includes an ejection hole 39 and a first guide piece 40 which is closed at the front of the first ejection hole 39 and opened upward, and ejects secondary air into the combustion chamber 37 to generate a flame. To prevent the wraparound.

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 44 including an ejection hole 42 and a second guide piece 43 that closes the front of the second ejection hole 42 and opens the upper portion.
The secondary air is blown out into the combustion chamber 37 to suppress the deviation of the flame and to prevent the one side wall from being burned out by the action of the air curtain.

The predetermined interval between the combustion chamber 37 and the cover frame 38 is vertically divided into a combustion chamber 37 side and a mixing chamber 16 side by a partition plate 45 from an upper end portion of the outer periphery of the mixing chamber 16, and the upper side is a combustion chamber. 37 is a cooling flow channel 46 for cooling and a lower portion is a heat retaining flow channel 47 for keeping the mixing chamber 16 warm. The cooling flow channel 46 and the heat retaining flow channel 47 are connected to the mixing chamber 16 on the opposite side of the vaporizer 1.
It communicates only at the tip.

Reference numeral 48 denotes a combustion fan, which communicates with the jet port 3 and the cooling channel 46 through an air passage 49, supplies primary air for combustion to the jet port 3, and supplies the vaporizer 1 to the cooling channel 46. The secondary air for cooling the combustion chamber 37 is supplied through the outer periphery, and the secondary air for cooling is heated by flowing through the cooling flow passage 46, and is heated from the front end side of the mixing chamber 16 to the heat retaining flow. Road 47
To keep the mixing chamber 16 warm,
The secondary air is divided into a plurality of parts from the bottom 6 and passes through the secondary air chamber 18 to be supplied from the secondary air holes 27 to the burner 23 as secondary air for combustion.

Reference numeral 50 denotes an electromagnetic pump for supplying fuel oil to the fuel injection nozzle 2 via an oil feed pipe 51, and reference numeral 52 denotes a heat shield plate.

Next, the operation of the embodiment of the present invention will be described. When the heating heater 12 is energized to heat the vaporizer 1 to a predetermined temperature, this is detected by a temperature sensor (not shown) provided at an appropriate position, and the combustion fan 48 and the electromagnetic pump 50 are detected.
Is driven, fuel oil is supplied to the carburetor 1 from the fuel injection nozzle 2, and primary air for combustion is supplied 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 vaporizing surface 7 and diffuses uniformly around the flat surface 8 because it has no irregularities. The primary air supplied on the bead 9 moves in a sequential manner along the meandering path 10 due to the wind blown by the primary air. The primary air also causes turbulence and is sufficiently mixed with the vaporized gas, so that a good mixed gas can be obtained.

Therefore, the lightweight and compact vaporizer 1 is obtained by the vertical vaporizing surface 7, a compact and powerful combustion device can be obtained, and a sufficient mixed gas can always be formed without lowering the vaporizing ability. Things.

The vaporized gas vaporized on the vertical vaporizing surface 7 is:
The primary air which 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 of the outlet 6 flows into the mixing chamber 16, and the mixing chamber 16 is heated for a predetermined time by the auxiliary heater 20 which is energized simultaneously with the preheating of the vaporizer 1, and Since the high-temperature preheating state is maintained, the inflowing mixed gas does not liquefy.

After the gas mixture is rectified in the rectification chamber 17, the gas mixture is immediately finely divided into a plurality of gas chambers 19, and flows into the gas chambers 19. The ejection speed of the mixed gas ejected from the flame holes 26 of the 24 becomes 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 receive a large amount of mixed gas and burn with a larger flame than the other flame holes 26. It is possible to obtain a somewhat good heat-back amount even at the time of small thermal combustion in which only a flame dedicated to heat-back is formed. By the spread, the flame enters the vertical groove 34 of the adjacent heat absorbing fin 31 from both sides, and the flame passes through the vertical groove 34 from the lower end to the upper end.
Since the heat absorption 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 combustion in which the amount of vaporization increases.

Therefore, at the time of a small thermal power where the heat-back amount is not so large, the normal heat-back is performed, so that the vaporizer 1 can be prevented from melting due to too much heat power, and the large thermal power which requires a large heat-back amount can be prevented. In some cases, the amount of heat back can be naturally increased by using the spread of the flame and the vertical groove 34, that is, the heat absorption area can be automatically increased or decreased according to the thermal power, and good vaporization is always performed with the optimal heat of vaporization. Good combustion is maintained and, of course, after the start of combustion, the heating
It is possible to surely save power without having to energize the power supply 12.

Further, the combustion heat that rises between the heat absorbing fins 31 and in the vertical grooves 34 during the combustion is restrained by the upper restraint plate 35 from rising, and then escapes obliquely upward from the inclined portion 32 at the upper end of the heat absorbing fin 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 sudden change in the combustion pressure above the heat absorbing fins 31, and goes around the suppression plate 35, and as it is, the combustion chamber on the carburetor 1 side. 37, the first air blowing part 42 is provided and a part of the secondary air is blown out. In addition, the danger of burning and burning the wall surface of the combustion chamber 37 is reliably prevented.

The secondary air flowing into the cooling flow passage 46 from the outer periphery of the carburetor 1 flows while cooling the combustion chamber 37 from both sides, so that the heating of the combustion chamber 37 can be reliably prevented. The cooled secondary air is heated in the mixing chamber 1
6 From the front end side, flow to the lower heat retaining flow path 47, and then, while keeping the temperature of the mixing chamber 16, pass through the secondary air chamber 18 divided into plural parts at the bottom and from the secondary air hole 27 to the burner section 23. The secondary air is supplied and supplied through the secondary air chamber 18, so that the secondary air is reliably rectified, and a series of flows including cooling, warming, and combustion are performed smoothly, so that good combustion is always obtained. .

If a hot water supply heat exchanger (not shown) through which water flows inside is installed above the combustion chamber 37, a good hot water supply with low combustion noise and good responsiveness can be obtained. It is.

[0039]

In short, the present invention provides a vaporizer having a heater for heating and having an outlet for mixed gas at the bottom, a mixing chamber below the vaporizer communicating with the outlet, and an upper part of the mixing chamber. A burner provided on the back side of the vaporizer and a combustion chamber which is open above and surrounds the burner, wherein the vaporizer, the mixing chamber and the combustion chamber are used for combustion. A cover frame for covering a predetermined space through which the secondary air flows; furthermore, the predetermined space is vertically divided into a combustion chamber side and a mixing chamber side by a partition plate, and a front end side of the mixing chamber opposite to the vaporizer. The upper part is a cooling passage through which the air for cooling the combustion chamber flows, and the lower part is through which the heated air flows after the cooling passage flows, and the lower part is secondary to the burner from below the mixing chamber. Since it is a heat retention channel that is supplied as air, it cools the combustion chamber using secondary air for combustion. Thus, the combustion chamber is prevented from being burned, and the secondary air heated by the cooling is further used for keeping the temperature of the mixing chamber to prevent liquefaction of the vaporized gas. -Good combustion can always be obtained by supplying to the corner, and by constructing an efficient secondary air supply path without waste, effective use of secondary air can be measured and simple and inexpensive combustion can be achieved. Can be provided.

[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.

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

FIG. 6 is a front view of the vaporizer.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 vaporizer 12 heating heater 16 mixing chamber 23 burner section 37 combustion chamber 38 cover frame 45 partition plate 46 cooling channel 47 heat retaining channel

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yukitaka Nakamura 7-7 Higashi Shinbo, Sanjo City, Niigata Pref. (72) Inventor Takahiro Kimura 7-7 Higashi Shinbo, Sanjo City, Niigata Pref. Katsuyuki Azuma (56) References JP-A-5-164306 (JP, A) JP-A-4-28919 (JP, A) JP-A-5-164305 (JP, A) JP-A-3-221705 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) F23D 11/10 F23D 11/40 F23D 11/44

Claims (1)

(57) [Claims] 1. A vaporizer having a heating heater and having an outlet for mixed gas at the bottom, a mixing chamber communicating with the outlet at a lower portion of the vaporizer, and a rear side of the vaporizer at an upper portion of the mixing chamber. And a combustion chamber which is open upward and surrounds the upper part of the burner section, in which secondary air for combustion flows through the vaporizer, the mixing chamber and the combustion chamber. A cover frame is provided to cover the combustion chamber side and the mixing chamber side vertically by a partition plate, and the upper and lower sides are communicated only at the front end side of the mixing chamber opposite to the vaporizer. The upper portion is a cooling channel through which air for cooling the combustion chamber flows, and the lower portion is heated air flowing through the cooling channel, and supplied as secondary air to the burner from below the mixing chamber. A vaporized petroleum combustion device characterized by a heat retaining channel.