JP3848184B2 - Vaporizing oil combustion equipment - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a vaporization type oil combustion apparatus provided with a heating heater that constitutes a combustion section of a heater or a hot water heater.
[0002]
[Prior art]
Conventionally, in this type, as disclosed in, for example, Japanese Patent Laid-Open No. 5-99407, secondary air is circulated from both sides of the combustion chamber to cool the combustion chamber wall. The secondary air was supplied as secondary air to the burner section while being divided into a plurality of paths from the opposite side of the carburetor, so as to always obtain good combustion.
[0003]
[Problems to be solved by the invention]
By the way, in this conventional thing, since it is supplied to a burner part as secondary air from the confluence | merging part of the secondary air which distribute | circulated from the both sides of the combustion chamber, it is a turbulent state by the collision by the distribution | circulation from both sides. The mixing chamber, which is supplied as it is, has a problem that the formed flame 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 provided from the vaporizer and the burner section. Since it is heated only by heat conduction, it has a problem of liquefaction of vaporized gas due to insufficient heat.
[0004]
[Means for solving problems]
The present invention pays attention to this point and solves the above-mentioned drawbacks. In particular, the configuration is a vaporizer having a heater for heating and having a mixed gas outlet at the bottom, and an outlet at the lower part of the vaporizer. A vaporizer comprising: a communicating mixing chamber; a burner portion provided on the vaporizer rear side at the upper portion of the mixing chamber; and an upwardly open combustion chamber surrounding the burner portion. And a cover frame that covers the mixing chamber and the combustion chamber through a predetermined interval through which secondary air for combustion flows, and further partitions the predetermined interval into a combustion chamber side and a mixing chamber side by a partition plate, An inlet is provided only at the front end of the mixing chamber on the side opposite to the carburetor, and the upper and lower sides communicate with each other. Circulates and is supplied as secondary air to the burner section from below the mixing chamber. Those having a first guide plate to flow and along the secondary air comes to flow into the mixing chamber bottom.
[0005]
As a result, air that has not been supplied into the carburetor flows as secondary air from the outer periphery of the carburetor first through the cooling passages on both sides of the outer periphery of the combustion chamber to cool the combustion chamber and prevent burnout. On the other hand, the secondary air whose temperature has risen flows as it is in the lower heat retaining flow path, and is guided by the first guide plate to heat the mixing chamber and maintain the heat retaining state, while maintaining the upper secondary air hole from the bottom of the mixing chamber. Thus, it is supplied smoothly to the burner section, and good combustion can be obtained without generating turbulent flow.
[0006]
According to the second aspect of the present invention, the first guide plate is provided at a position facing the inflow port below the mixing chamber, and the tip is extended to the bottom of the mixing chamber to form the opening at the center of the tip. The heat retention effect and the combustion state are always maintained in a good state by concentrating on.
[0007]
According to the third aspect of the present invention, since the second guide plate having the opening formed in the central portion is erected at the middle position of the mixing chamber at the bottom of the heat retaining channel, the secondary air is guided again at the middle position. Thus, good combustion can be obtained as heat insulation and secondary air without fail until the end.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Next, a vaporization type oil combustion apparatus according to the present invention will be described based on an embodiment shown in the drawings.
1 is a recumbent vaporizer made of aluminum die-casting, and the front is closed by a lid 4 having a fuel injection nozzle 2 and a primary air jet 3, and is divided into two by a partition wall 5 at the bottom. A mixed gas outlet 6 is formed.
[0009]
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 to which the fuel oil is sprayed is used to measure the uniform diffusion of the fuel oil. Further, a plurality of beads 9 having different lengths are arranged in the horizontal direction and in parallel with each other around the flat surface 8 to form a meandering passage 10 for flowing down fuel oil. It is what.
[0010]
Further, the flat surface 8 and the meandering path 10 are respectively provided on the left and right on the vertical vaporization surface 7 so that the injection holes 11 of the fuel injection nozzle 2 are formed on the left and right respectively. ing.
[0011]
A heating heater 12 is a U-shaped sheath heater cast into the carburetor 1 and protrudes from the vertical vaporization surface 7 to the fuel injection nozzle 2 side, above the vertical vaporization surface 7. It is cast into the upper side wall 13 that covers the space and the lower side wall 14 that protrudes from the lower side of the vertical vaporization surface 7 and forms the outlet 6.
[0012]
15 is a trapezoidal guide wall as seen from the plane provided at the final end of the meandering path 10 of the carburetor 1, and a mixture of vaporized gas formed in the carburetor 1 and primary combustion air is supplied to the two streams at the bottom. The outlet 6 is smoothly divided and guided.
[0013]
16 is an aluminum die-cast mixing chamber provided at the lower part of the vaporizer 1, and is connected to the outlet 6 to rectify the mixed gas so as to be recessed one step downward to increase the capacity, A plurality of gas chambers 19 having a secondary air chamber 18 alternately formed in a tapered shape that communicates with the rectifying chamber 17 and communicates downward between them are integrally formed, and a U-shape is formed at the bottom of the rectifying chamber 17. An auxiliary heater 20 made of a shaped sheath heater is cast, and the mixing chamber 16 is preheated by energization only for a predetermined time during preheating.
[0014]
In addition, a heat-resistant paint is applied to the inner surface of the mixing chamber 16 to form a fine uneven coating surface 21, thereby making the mixed gas jetting speed uniform and promoting rectification as a mixed gas flow resistance. is there.
[0015]
Reference numeral 22 denotes a rectifying plate that is suspended from the upper side at each gas chamber 19 inlet. The rectifying plate is formed by alternately forming notches and bent pieces on a single plate, and approximately 1/6 of the gas chamber 19 inlet area is formed. By closing from above, the blowing force to the gas chamber 19 is suppressed to form a uniform flame as a whole.
[0016]
23 is 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 portion 24 fixed on the gas chamber 19. The secondary air supply part 25 is formed by a recess between the adjacent flame hole parts 24 and communicated with the secondary air chamber 18, and extends from the center part to the side wall at the top part of the flame hole part 24. The elongated inverted L-shaped flame holes 26 are alternately formed on the left and right along the longitudinal direction, and further, a secondary air hole 27 communicating with the secondary air chamber 18 is provided at the bottom of the secondary air supply part 25, and the flame hole part. The small holes formed in the 24 flange portions 28 are superposed to form a distance from the flame hole 26 so that the secondary air can be reliably rectified.
[0017]
Reference numeral 29 denotes a flame holding guide fixed to both sides of the flame hole 24, and the upper part facing the flame hole 26 is bent obliquely upward on the opposite side of the flame hole 26, so that the flame formed in the flame hole 26 It suppresses the spread and guides the secondary air supplied from below.
[0018]
Reference numeral 30 denotes a heat-resistant rectifying arm provided in the flame hole portion 24, which is formed by braiding a wire rod having a wire diameter of 0.29 mm into 36 mesh, and performs the final rectification of the mixed gas ejected from the flame hole 26. is there.
[0019]
31 is a vertically long endothermic fin that protrudes from the back of the carburetor 1 onto the burner section 23, and is divided into a plurality of parts to increase the contact area with the combustion gas and increase the heat back amount. The heat heat back is used as vaporization heat to save power in the heating heater 12, and the upper end is an inclined portion 32 that is inclined downward toward the burner portion 23, and rises. This improves the escape of combustion heat.
[0020]
Further, a flame hole portion 24 is disposed in the lower part between the heat absorption fins 31, and the flame hole portion 24 between the heat absorption fins 31 has a size about 2 times that of the other flame holes 26. A large flame hole 33 consisting of two squares is formed, and a vertical groove 34 extending from the lower end to the upper end is provided on the projecting end face of each heat-absorbing fin 31, and is formed in the large flame hole 33 at the time of large thermal combustion. As the flame spreads, the flames enter the longitudinal grooves 34 to increase the heat absorption area.
[0021]
Reference numeral 35 denotes an L-shaped deterrent plate provided above the heat-absorbing fins 31, which projects from the vaporizer 1 side to about 2/3 on the heat-absorbing fins 31 and covers the space between the heat-absorbing fins 31 and the vertical grooves 34. In order to suppress the rising force of the combustion heat that is generated, and when the entire upper portion of the heat sink fin 31 is covered, slits and holes are formed in the suppression plate 35 itself so as to adjust the suppression force. Anyway, it is good.
[0022]
36 is a concavo-convex surface formed by continuously forming a plurality of lateral R-shaped convex portions on the back wall of the carburetor 1 between the heat-absorbing fins 31, increasing the heat-absorbing area and controlling the rising power of the combustion heat, -Tobacco is obtained, and since it has an R shape in particular, only its upward force can be suppressed smoothly without causing turbulent flow in the combustion heat.
[0023]
Reference numeral 37 denotes an open combustion chamber that exposes the back of the carburetor 1 and surrounds the burner portion 23. The outer periphery of the combustion chamber is covered with a cover frame 38 at a predetermined interval. Is provided with a first air ejection portion 41 composed of a plurality of first ejection holes 39 arranged in a row at regular intervals, and a first guide piece 40 that closes the front of the first ejection holes 39 and opens upward. Secondary air is jetted into the combustion chamber 37 to prevent the flame from wrapping around.
[0024]
Further, in the lower portion of one side wall of the combustion chamber 37 facing the back of the carburetor 1, there are a plurality of second injection holes 42 that are lined up at regular intervals, and the front of the second injection holes 42 is closed and the upper part is open. A second air ejection portion 44 comprising two guide pieces 43 is provided to eject secondary air into the combustion chamber 37 to suppress the deviation of the flame and to prevent burning of one side wall by the air-curtain action. To do.
[0025]
Further, the predetermined interval between the combustion chamber 37 and the cover frame 38 is partitioned into a combustion chamber 37 side and a mixing chamber 16 side by a partition plate 45 from the upper end of the outer periphery of the mixing chamber 16, and the upper portion is for cooling the combustion chamber 37. The cooling channel 46 and the heat retaining channel 47 for retaining the mixing chamber 16 are provided below, and the cooling channel 46 and the retaining channel 47 are formed at the tip of the mixing chamber 16 on the opposite side of the vaporizer 1. It communicates only at the inlet 48.
[0026]
A combustion fan 49 communicates with the jet outlet 3 and the cooling flow path 46 through the air passage 50, supplies primary air for combustion to the jet outlet 3, and passes through the outer periphery of the vaporizer 1 to the cooling flow path 46. The secondary air for cooling the combustion chamber 37 is supplied, and the secondary air for cooling is heated by flowing through the cooling flow path 46 and is supplied from the front end side of the mixing chamber 16 to the heat retaining flow path 47. The mixing chamber 16 is kept warm, and the mixing chamber 16 is divided into a plurality of parts from the bottom of the mixing chamber 16, passes through the secondary air chamber 18, and is supplied as secondary air for combustion from the secondary air holes 27 to the burner section 23. It is what is done.
[0027]
Reference numeral 51 denotes a first guide plate provided in the heat retaining channel 47 so as to face the inlet 48 so that the front end extends below the mixing chamber 16 so that the secondary air from the inlet 48 flows toward the mixing chamber 16. In addition to guiding, an opening 52 is formed in the central portion of the tip so that the secondary air is concentrated in the central portion.
[0028]
53 is provided in the heat retaining channel 47, both ends thereof are erected, an opening 54 is formed in the central portion of the standing wall on the inlet 48 side, and the heat retaining channel 47 is closed by the other standing wall. The two guide plates keep the mixing chamber 16 at the bottom and smoothly supply the secondary air to the burner unit 23 and prevent the vaporizer 1 from cooling.
An electromagnetic pump 55 supplies fuel oil to the fuel injection nozzle 2 via an oil feed pipe 56.
[0029]
Next, the operation of the embodiment of the present invention will be described.
If the heating heater 12 is energized and the vaporizer 1 is heated to a predetermined temperature, this is detected by a temperature sensor (not shown) provided at an appropriate place, and the combustion fan 49 and the electromagnetic pump 55 are driven. The carburetor 1 is supplied with fuel oil from the fuel injection nozzle 2 and the primary air for combustion from the injection port 3.
[0030]
In the carburetor 1, the fuel 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 uniformly diffuses to the surroundings. 9 has a blowing force of the primary air supplied over 9 and sequentially moves along the meandering path 10, and the vaporization is promoted with sufficient vaporization time, and the primary air supplied by the unevenness by the bead 9. Also, turbulent flow is caused and mixing with the vaporized gas is sufficiently performed, so that a good mixed gas can be obtained.
[0031]
Accordingly, the light and compact carburetor 1 can be obtained by the vertical vaporization surface 7, and a small and powerful combustion apparatus can be obtained, and a sufficient mixed gas can always be formed without reducing the vaporization ability. .
[0032]
The vaporized gas vaporized on the vertical vaporization surface 7 is collided with the vertical vaporization surface 7 and the primary air is bounced back, and the upper and lower side walls 13 · provided with the heating heater 12 in the recumbent vaporizer 1. However, since the upper and lower side walls 13 and 14 are sufficiently heated by the heating heater 12, the vaporization of the vaporized gas is further promoted, the primary air is also heated well, and the vaporizer 1 Is a recumbent shape, and the vaporized gas and the primary air do not flow out immediately, but stay in the vaporizer 1 to some extent and mix well, and then flow out from the outlet 6.
[0033]
On the other hand, the mixed gas flowing out from the outlet 6 flows into the mixing chamber 16, and the mixing chamber 16 is heated for a certain time by the auxiliary heater 20 energized simultaneously with the preheating of the vaporizer 1, thereby preheating at a high temperature. Since the state is maintained, the inflowing mixed gas is not liquefied.
[0034]
Then, after the rectification is promoted in the rectifying chamber 17, the mixed gas is immediately divided into a plurality of gas chambers 19, and flows into the gas chamber 19. The jet velocity of the mixed gas jetted from the hole 26 is uniform regardless of the longitudinal direction, and the mixed gas passes through the rectifying mist 30 immediately before being jetted from the flame hole 26 and is finally rectified and jetted. Combustion is started when the ignition means (not shown) appropriately ignites.
[0035]
Also, between the heat-absorbing fins 31 at the time of combustion, the large flame holes 33 of the flame holes 24 are supplied with a large amount of mixed gas and burned with a larger flame than the other flame holes 26, and only between the heat-absorbing fins 31. -Even at the time of small thermal combustion where a flame dedicated to tobacco is formed, a certain amount of heatback can be obtained. Further, at the time of large thermal power combustion, due to the spread of the flame formed in the large flame hole 33, A flame enters the longitudinal groove 34 of the adjacent heat-absorbing fin 31 from both sides, and the flame passes through the longitudinal groove 34 from the lower end to the upper end, thereby substantially increasing the endothermic area and increasing the amount of vaporization. Even during thermal combustion, a sufficient amount of heat back can be obtained and good combustion can be performed.
[0036]
Therefore, when the heating power is small and the heat back amount is not so large, the normal heat back is performed and the carburetor 1 is prevented from being melted due to too much heat. When the heating power requires a large amount of heat back, the flame is heated. The amount of heat back can be increased naturally by using the spread of the groove and the vertical groove 34, that is, the endothermic area can be automatically increased / decreased according to the thermal power, and good vaporization can always be performed with the optimum heat of vaporization. Combustion is maintained and, of course, it is not necessary to energize the heating heater 12 after the start of combustion, and power saving can be reliably achieved.
[0037]
Further, the combustion heat rising between the heat absorption fins 31 during combustion and the inside of the vertical groove 34 is suppressed by the upper deterrence plate 35 and is released obliquely upward from the inclined portion 32 at the upper end of the heat absorption fin 31. Therefore, the combination of the inclined portion 32 and the suppression plate 35 allows the combustion heat to flow from between the inclined portion 32 and the suppression plate 35 without trapping hot air between the heat-absorbing fins 31 and in the vertical grooves 34 and causing abnormal heating. By making it come off easily, a good heat back amount is obtained while suppressing the ascending force to some extent.
[0038]
On the other hand, the flame rising between the endothermic fins 31 is subjected to a sudden change in combustion pressure above the endothermic fins 31 and enters the combustion chamber 37 wall on the carburetor 1 side as it is around the suppression plate 35. Here, the first air ejection portion 42 is provided and a portion of the secondary air is ejected here, so that it is pushed back and smoothly exits upward, and the carburetor 1 and the combustion chamber The risk of heating and burning the 37 wall surface is surely prevented.
[0039]
The secondary air flowing into the cooling channel 46 from the outer periphery of the vaporizer 1 flows while cooling the combustion chamber 37 from both sides, and can reliably prevent the combustion chamber 37 from being heated. The secondary air is heated and flows from the inlet 48 at the front end side of the mixing chamber 16 to the heat insulating flow path 47 below, and this time, the secondary air is divided into a plurality of parts at the bottom while keeping the mixing chamber 16 warm. It passes through the chamber 18 and is supplied from the secondary air hole 27 to the burner section 23.
[0040]
At this time, the secondary air whose temperature has risen is first guided by the first guide plate 51 so as to flow along the bottom of the mixing chamber 16, and short-circuits from both sides of the combustion chamber 37 to both sides of the bottom of the mixing chamber 16. The opening 52 is corrected to the flow at the center so that the heat retaining action of the mixing chamber 16 is efficiently performed and the secondary air is smoothly supplied to the burner 23. Further, the second guide plate 53 concentrates the flow of the secondary air again at the central portion at the intermediate portion and the end portion of the heat retaining channel 47, and the carburetor 1 below the secondary air is in a higher temperature state. The end portion of the bottom of the mixing chamber 16 is prevented from being cooled in reverse, so that good combustion is always obtained.
[0041]
If a hot water supply heat exchanger (not shown) in which water circulates inward is installed above the combustion chamber 37, a good hot water supply with low combustion noise and good responsiveness can be obtained.
[0042]
【The invention's effect】
As described above, according to the present invention, the combustion chamber is cooled using the combustion secondary air to prevent burning of the combustion chamber, and the secondary air heated by this cooling is further mixed. This is used to keep the chamber warm and to prevent the liquefied gas from being liquefied, and by correcting the flow of the secondary air, an efficient warming effect can be obtained and a smooth secondary air bar can be obtained. By supplying the secondary section, good combustion is always performed, and by constructing an efficient secondary air supply path without waste, the secondary air can be used effectively and a simple and inexpensive combustor can be provided. Is.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a vaporization type oil combustion apparatus to which one embodiment of the present invention is attached.
FIG. 2 is a cross-sectional view of the combustion chamber.
FIG. 3 is a sectional view of the burner portion.
FIG. 4 is a perspective view of the first guide plate.
FIG. 5 is a perspective view of the second guide plate.
FIG. 6 is an exploded perspective view of the burner portion.
FIG. 7 is an enlarged sectional view of the burner portion.
FIG. 8 is a front view of the vaporizer.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Vaporizer 6 Outlet 12 Heating heater 16 Mixing chamber 23 Burner part 37 Combustion chamber 38 Cover frame 45 Partition plate 46 Cooling flow path 47 Thermal insulation flow path 48 Inlet 51 First guide plate 52 Opening 53 Second guide plate 54 opening

Claims (3)

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 lower part of the vaporizer, and a bar provided on the back side of the vaporizer at the upper part of the mixing chamber. And a combustion chamber having an open top surrounding the burner portion, the vaporizer, the mixing chamber and the combustion chamber passing through a predetermined interval through which secondary air for combustion flows. The cover frame is further divided by a partition plate into a combustion chamber side and a mixing chamber side, and an inlet is provided only at the front end side of the mixing chamber on the opposite side of the carburetor so that the upper and lower sides communicate with each other. The upper part is a cooling passage through which air for cooling the combustion chamber flows, and the lower part is warming air after the cooling passage has passed through and is supplied as secondary air from below the mixing chamber to the burner section. A first guide plate that is used as a flow path and further flows the secondary air flowing into the heat retaining flow path along the bottom of the mixing chamber. Evaporative oil combustion apparatus, characterized in that with. 2. The vaporized petroleum oil according to claim 1, wherein the first guide plate is provided at a position facing the inflow port below the mixing chamber, and the tip is extended to the bottom of the mixing chamber to form an opening at the center of the tip. Combustion device. The vaporization type petroleum combustion apparatus according to claim 1 or 2, wherein a second guide plate having an opening at the center is erected at an intermediate position of the mixing chamber at the bottom of the heat retaining channel.

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