JPS6335216Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a rotary vaporizing burner, and its purpose is to provide a low-noise burner with stable combustion that effectively supplies secondary air with a simple configuration. .

As shown in FIG. 4, a conventional burner of this type has a combustion tube C having a flame port A on its inner peripheral surface and a gas chamber B inside, and a hollow cylindrical vaporization tube D rotatably installed in the center of the combustion tube C. , the inside of the vaporization cylinder D and the gas chamber B were communicated with each other, and air and oil were blown into the vaporization cylinder D. In the initial stage, the oil supplied into the vaporization tube D is scattered by centrifugal force and ignited to form droplet combustion, and then the vaporization tube D is heated by the droplet combustion flame.
The oil was vaporized, a mixture with air was created in the gas chamber B, and the mixture was ejected from the flame port A, resulting in a transition to vaporization combustion. However, during vaporization combustion, the total
When it was combusted with air, the jet flow from the flame port was fast and the combustion noise was loud. Furthermore, when the ambient conditions such as the amount of air and oil changed, flashback was likely to occur and combustion was unstable. For this reason, some devices supply secondary air from around the combustion tube, but because the flame opening surface is cylindrical, secondary air cannot be effectively supplied and the effect is small. Furthermore, interference between flames attached to adjacent flame ports was unavoidable, and the effect of reducing combustion noise was also small. Furthermore, since the ignition electrode E and the like are provided through the secondary air passage F, the structure is complicated in order to maintain airtightness.

The present invention eliminates the above-mentioned drawbacks of the conventional art, and will be described below along with an embodiment shown in the drawings.
FIG. 1 is a perspective view of the burner. Figure 2 is A.
-A sectional view, and FIG. 3 is a BB sectional view. Reference numeral 1 denotes a rectangular combustion disk having a premixing chamber 3 inside thereof, and is installed inside a burner case 4.
A recess is formed in the center of the combustion disk to accommodate the burner case 4.
A rotary shaft 6 of a blower 5 installed below projects upward and is inserted through the shaft, and a hollow cylindrical vaporizing cylinder 7 with an open bottom is provided at the tip of the rotary shaft 6, with a scattering gap 8 formed between it and the upper surface of the recess. It is installed with a
A large number of flame ports 2 are provided only on both sides of the upper surface of the combustion plate 1 where the vaporizer tube 7 is installed, that is, at both ends in the longitudinal direction. An air port 17 is opened at the top of the vaporization tube 7, and an air introduction tube 9 communicating with the air port 17 is integrally attached to the top of the vaporization tube 7. Reference numeral 10 denotes a gas collecting cylinder which communicates the inside of the vaporizing cylinder 7 with the premixing chamber 3. Reference numeral 11 denotes a blower pipe provided on the outer periphery of the gas collecting pipe 10 passing through the premixing chamber 3;
Air is supplied to the gap between the vaporizing tube 7 and the gas collecting tube 10 in a direction opposite to the diffusion direction of oil, and then the air or mixture is passed from the gas collecting tube 10 to the outer periphery of the blast pipe 11 in the premixing chamber 3. It passes through and reaches the flame outlet 2. Moreover, the burner case 4
A blower passage 12 is provided only on both sides in the transverse direction, higher than the upper surface of the combustion plate 1, one end is the blower 5, and the other end is the blower pipe 11 and the lower end 9a of the air introduction tube 9.
is communicated with. Reference numeral 16 denotes a secondary air port provided above the combustion disk 1 on the inner wall of the burner case 4, which supplies air within the ventilation passage 12 to the flame port surface.
Further, on one side of both longitudinal sides of the burner case where no ventilation passage is provided, an ignition electrode rod 13,
A flame rod 14, an oil feed pipe 15 opened toward the inner surface of the vaporizing tube 7, and the like are provided to penetrate the burner case 4. The burner case 4 is provided in the gap between the combustion disk 1 and both longitudinal sides of the burner case 4.
A heat insulating material 18 is provided to prevent the temperature from rising.

The present invention has such a configuration, and its operation will be explained next. First, the blower 5 is driven to blow air into the air passage 12, and at the same time, the vaporizer tube 7 is rotated. Next, when oil is supplied to the inner surface of the vaporizer tube 7 from the oil feed pipe 15, the oil diffuses on the inner surface of the vaporizer tube 7 and scatters from the scattering gap 8 in the form of fine particles. On the other hand, the air that has entered the ventilation passage 12 is turned back at the upper end of the burner case 4, a part of which is blown out from the secondary air port 16, and the rest is guided below the combustion plate 1 and into the blast pipe 11 and the air introduction tube 9. Inflow. The air that has flowed into the blast pipe 11 is
The oil flows inside the vaporization tube 7 against the diffusion direction of the oil and flows into the gas collecting tube 10 , and a part of it flows out from the scattering gap 8 . The air flowing out from the scattering gap 8 is mixed with petroleum particles by the rotating vaporizer cylinder 7. When an ignition spark is generated by the ignition electrode 13, droplet combustion is formed around the vaporization cylinder 7. Air introduction tube 9
The air that has flowed in flows out from the air port 17 and is supplied as secondary air to the droplet combustion flame surrounding the vaporization cylinder 7. The vaporizing cylinder 7 is heated by this combustion heat, vaporizing the oil flowing inside the cylinder and also heating the air. At this time, since the flow of oil and air is countercurrent, the vaporized oil is quickly separated from the inner surface of the vaporization cylinder 7 by the air, and the continued vaporization of the oil is made smooth. Then, the vaporized petroleum is carried by the air flow, flows from the gas collecting pipe 10 to the premixing chamber 3 while being mixed and stirred, and is discharged from the flame port 2. However, at this point, the gas collecting pipe 10, air introducing pipe 9, and premixing chamber 3 have not yet warmed up, so
The air-fuel mixture that comes into contact with these is deprived of latent heat, re-liquefies, and accumulates at the bottom of the premixing chamber 3. The mixture flowing out from the flame port 2 is ignited by a droplet combustion flame, and secondary air is supplied from the secondary air port 16 located above the flame port 2 so as to intersect with the flow of the mixture. As a result, quiet vaporization combustion is formed. After the transition to vaporization combustion, the vaporization cylinder 7 is heated by this combustion heat, so vaporization continues. Also, secondary air port 1
6 is provided above the flame port 2, the secondary air port 16 is also ignited with flame, and the burner case 4 forming the ventilation passage 12 becomes hot. Since combustion air flows there, the air flowing through the ventilation passage 12 after transitioning to vaporization combustion is preheated, warming the bottom of the premixing chamber 3 and the air introduction tube 9, and raising the air-fuel mixture temperature in a shorter time than before. be given Therefore, the above-mentioned reliquefaction is not only completed in a shorter time than in the past, but also the reliquefied petroleum is given heat of vaporization by the high-temperature mixture and is quickly vaporized again. As vaporization combustion progresses, the top of the vaporization cylinder 7 becomes hot, which causes the Leidenfrost phenomenon, which causes oil to instantly separate from the inside of the vaporization cylinder 7, and vaporization no longer occurs. In this embodiment, cooling air is poured into the air introduction tube 9 to cool the top of the vaporization tube 7, which also serves to prevent air-fuel mixture from leaking from the gap between the combustion disk 1 and the rotating shaft 6, so that stable combustion is always achieved. It can be maintained. Further, the air that has cooled the top of the vaporization cylinder 7 is blown out from the air port 17 around the vaporization cylinder 7, and is used as secondary air for the above-mentioned initial combustion and vaporization combustion.

As described above, the present invention installs the vaporizing tube so as to have a scattering gap between it and the upper surface of the recess formed in the center of the rectangular combustion disk, and provides flame ports only on both sides of the cylinder, that is, at both ends in the longitudinal direction. Since the ventilation passages are formed only on both transverse sides of the rectangular burner case where the panel is installed, and the secondary air port is provided above the combustion panel, the combustion air is separated into primary and secondary air. The amount of air in the mixture ejected from the flame port is small, the ejection flow rate is slow, and the combustion noise is quiet. Since the secondary air is supplied from the upper side of the flame nozzle across the flame, it is effectively supplied to all the flames and stable combustion can be achieved. Furthermore, since the burner case with the secondary air port is also ignited, the primary air is immediately preheated, minimizing the re-liquefaction of the vaporized oil and quickly re-vaporizing the re-liquefied oil, eliminating white smoke and odor. can be prevented. Furthermore, by attaching accessory parts such as the ignition electrode rod and flame rod to one side of the burner case in the longitudinal direction, the construction can be simplified because the accessory parts do not pass through the ventilation passage, and maintenance and inspection can be easily performed. In addition, if a flame port is provided on one side in the longitudinal direction opposite to the mounting surface of the above-mentioned accessory, the air-fuel mixture supplied in a swirling state will hit the mounting surface, and the flame port at both ends on the mounting surface side will However, according to the present invention, by providing flame ports only at both ends in the longitudinal direction, the air-fuel mixture is distributed to the surface facing the mounting surface. In this case, the pressure difference between the flame ports is reduced, and therefore the deviation in the amount of combustion described above is reduced, and substantially uniform vaporization combustion is performed. In addition to the above-mentioned effect of introducing secondary air, the air introduction cylinder of this embodiment also prevents the leakage of the air-fuel mixture and cools the top of the vaporization cylinder, thereby stabilizing the supply of fuel and contributing to the stability of combustion.

[Brief explanation of drawings]

Figures 1, 2, and 3 show an embodiment of the present invention, with Figure 1 being a perspective view and Figure 2 being an A-
This is a sectional view taken along line A, and FIG. 3 is a sectional view taken along line BB. FIG. 4 is a schematic sectional view showing a conventional example. 1... Combustion disk, 2... Burner port, 3... Premixing chamber,
4... Burner case, 6... Rotating shaft, 7... Vaporizing cylinder, 8... Scattering gap, 12... Air blowing passage, 13...
...Ignition electrode, 14...Flame rod, 16...
...Secondary air vent.

Claims (1)

[Scope of utility model registration request] A rectangular combustion plate with a large number of flame ports on the upper surface of both longitudinal ends and a premixing chamber inside is installed inside the burner case, and a recess formed in the center of the burner case receives combustion from below the burner case. A hollow cylindrical vaporizing cylinder that protrudes above the board and has a rotating shaft inserted therethrough, and is open at the bottom is attached to the tip of the rotating shaft so as to have a scattering gap between the top surface of the recess and the inside of the vaporizing cylinder and the premixing chamber. In the burner case, accessories such as an ignition rod and a flame detector are attached to one side in the longitudinal direction of the burner case, and a ventilation passage is provided in the burner case excluding the mounting surface and the side surface facing the mounting surface. A rotary type vaporizing burner characterized in that a secondary air port is provided above the combustion disk on the inner surface of the burner case, which communicates the ventilation passage with the inside of the vaporization cylinder and forms the ventilation passage.