JP6867908B2 - Vaporizing oil combustion device - Google Patents

Description

The present invention relates to a vaporization type petroleum combustion device provided with a heating heater that constitutes a combustion unit of a heater or a water heater.

Conventionally, in this type of gas, a vaporizer equipped with a heating heater is used to form a premixed gas of the vaporized gas and the combustion air, and after further promoting this mixing in the mixing chamber, the heating gas is used. -It was intended to perform good combustion while receiving secondary air from the surroundings in the gas section.

The mixing chamber communicates with the lower part of the vaporizer and is formed shallower as the distance from the vaporizer increases, so that the ejection speed of the mixed gas ejected from the burner portion at the upper part of the mixing chamber is made uniform as a whole, and good combustion is achieved. Was trying to get.

The mixing chamber is made of die-cast aluminum provided in the lower part of the vaporizer, and is recessed one step downward so as to rectify the mixed gas through the outlet, and the rectifying chamber has a large capacity. It is configured by integrally molding a plurality of gas chambers that are partitioned into a tapered shape and alternately have secondary air chambers that communicate downward with each other, and a U-shaped sheath on the bottom of the rectifying chamber. An auxiliary heater consisting of a heater was cast and energized only for a certain period of time during preheating to preheat the mixing chamber. (See, for example, Patent Document 1.)

Japanese Patent Application Laid-Open No. 09-119611

By the way, in this conventional one, when the air supply / exhaust pipe is hit by the wind and the air supply is insufficient, the mixed gas reaching the tip of the mixing chamber is reduced, so that the cooling effect of the mixed gas is reduced and the mixture is mixed. The tip of the chamber becomes hotter than the root side where the vaporizer is located.

Furthermore, since the amount of mixed gas blown out from the burner at the tip of the mixing chamber is reduced, the flame formed at the tip is smaller than that at the root side where the vaporizer is located, and the flame is formed closer to the flame hole at the burner. Therefore, the flame formed in the burner portion becomes non-uniform, and the tip portion of the mixing chamber becomes even hotter than the root side where the vaporizer is located, which applies a force to warp the burner portion. When the warping force of the burner portion becomes larger than the fastening force of the screw fastening the mixing chamber and the tip of the burner portion at the upper part of the mixing chamber, a gap is generated between the mixing chamber and the burner portion. However, there was a problem that the combustion balance was lost and a flashback fire occurred.

In order to solve the above problem, in claim 1 of the present invention, a vaporizer provided with a heating heater, a combustion air injection port and a fuel injection nozzle, and a mixed gas outlet at the bottom. The lower part of the vaporizer is composed of a mixing chamber that communicates with the outlet, and the upper part of the mixing chamber is provided with a burner portion on the back side of the vaporizer. The mixing chamber has a flame hole portion of the burner portion. Vaporization type oil combustion in which gas chambers communicating with the gas chamber and a secondary air chamber communicating with the secondary air supply unit are alternately formed, and the gas chamber and the secondary air chamber are tapered as they move away from the vaporizer. In the apparatus, an engaging portion is formed at the tip of the burner portion, the tip of the engaging portion is formed in a substantially U-shaped cross section, and the tip of the mixing chamber is formed in a U-shaped portion. It is provided so as to surround it, and the engaging portion is engaged with the tip portion of the mixing chamber, and the tip portion of the burner portion is fixed to the tip portion of the mixing chamber with a screw. The portion is provided at the further tip portion of the screw at the tip portion of the burner portion .

According to claim 1 of the present invention, a vaporizer provided with a heating heater, a combustion air outlet and a fuel injection nozzle, and a mixed gas outlet at the bottom, and a lower portion of the vaporizer. The mixing chamber is composed of a mixing chamber communicating with the outlet and a burner portion provided on the back side of the vaporizer at the upper part of the mixing chamber, and the mixing chamber has a gas chamber communicating with the flame hole portion of the burner portion. In a vaporization type oil combustion device in which secondary air chambers communicating with a secondary air supply unit are alternately formed, and the gas chamber and the secondary air chamber are tapered as they move away from the vaporizer. An engaging portion was formed at the tip of the burner portion, the engaging portion was engaged with the tip portion of the mixing chamber, and the tip portion of the burner portion was fixed to the tip portion of the mixing chamber with a screw. Therefore, even if the tip portion of the mixing chamber becomes hot and the tip portion of the burner portion tries to warp upward, the fastening force by the screw and the engaging force in which the engaging portion engages with the tip portion of the mixing chamber are exerted. It is possible to prevent the tip portion of the burner portion from warping upward.

Further , according to claim 1 , the engaging portion is provided so that the tip thereof is formed in a substantially U-shaped cross section and the tip of the mixing chamber is surrounded by the U-shaped portion. Even if the tip of the burner becomes hot and the tip of the burner tries to warp upward, the tip of the burner is in a state where the engaging part having a substantially U-shaped cross section is caught by the tip of the mixing chamber. It cannot be warped upward, and the tip portion of the burner portion can be prevented from warping upward.

FIG. 3 is a cross-sectional view of a vaporization type oil combustion apparatus according to an embodiment of the present invention. Cross-sectional view of the root side of the mixing chamber. A perspective view of the mixing chamber and the burner section. A perspective view of the burner part. Cross-sectional view of the main part of the mixing chamber and the tip of the burner.

Next, an embodiment of the present invention will be described with reference to the drawings.
Reference numeral 1 denotes a horizontal bowl-shaped vaporizer made of die-cast aluminum, the front surface of which is closed by a lid 4 provided with a fuel injection nozzle 2 and a primary air ejection port 3, and two partition walls (not shown) at the bottom. The outlet 5 of the mixed gas partitioned into is formed.

In the vaporizer 1, the inner surface facing the fuel injection nozzle 2 is formed perpendicular to the fuel injection nozzle 2 to form a vertical vaporization surface 6, and the portion where the fuel oil is sprayed is for measuring the uniform diffusion of the fuel oil. A flat surface (not shown) is provided, and a plurality of beads 7 having different lengths are arranged in multiple stages in the horizontal direction and in parallel with each other around the flat surface, and a meandering path of fuel flowing down (not shown). (Not shown) is formed.

Reference numeral 8 denotes a heating heater composed of a U-shaped sheath heater cast into the vaporizer 1, which protrudes from above the vertical vaporization surface 6 toward the fuel injection nozzle 2 and above the vertical vaporization surface 6. It is cast into an upper side wall 9 that covers the space and a lower side wall 10 that protrudes from below the vertical vaporization surface 6 and forms an outflow port 6.

Reference numeral 11 denotes a trapezoidal guide wall provided at the final end of the meandering path (not shown) of the vaporizer 1, and a mixed gas formed in the vaporizer 1 and the primary air for combustion is mixed at the bottom. The two outlets 5 of the above are guided in a smooth manner.

Reference numeral 12 denotes a rectifying chamber 13 made of aluminum die-cast provided in the lower part of the vaporizer 1 and having a large capacity by being recessed one step downward so as to communicate with the outlet 5 and rectify the mixed gas. It is configured by integrally molding a plurality of gas chambers 15 having secondary air chambers 14 alternately communicating with each other in the rectifying chamber 13 and being tapered, and further forming a U shape at the bottom of the rectifying chamber 13. An auxiliary heater 16 made of a similar sheath heater is cast, and is energized only for a certain period of time during preheating to preheat the mixing chamber 12.
Further, the secondary air chamber 14 is formed in a substantially inverted U-shape in cross section, and the gas chamber 15 is formed in a substantially U-shape in cross section.

Reference numeral 17 denotes a burner portion formed on the back side of the vaporizer 1 on the gas chamber 15 and the secondary air chamber 14 of the mixing chamber 12, and the convex flame hole portion 18 fixed on the gas chamber 15 , The secondary air supply unit 19 communicating with the secondary air chamber 14 at intervals of the flame hole portion 18 is formed, and the upper portion of the flame hole portion 18 has an elongated inverted L-shape extending from the central portion to the side wall. The flame holes 20 are formed alternately on the left and right along the longitudinal direction, and a secondary air hole 21 communicating with the secondary air chamber 14 is further formed at the bottom of the secondary air supply unit 19 at the flange portion 22 of the flame hole portion 18. It is formed by superimposing the formed small pores.

Reference numeral 23 denotes an engaging portion, which is provided by forming the tip of the flange portion 22 into a substantially U-shaped cross section, and is attached so as to surround the tip of the mixing chamber 12 with the U-shaped portion, and is attached to the engaging portion 23. A threaded fastening hole 24 is formed at the tip of the enclosed mixing chamber 12, and the fastening screw 26 is inserted into the screw holes 25 provided at both ends of the flange portion 22 and screwed into the fastening hole 24. ..

Reference numeral 27 denotes a vertically long heat absorbing fin protruding from the back surface of the vaporizer 1 onto the burner portion 17, which is divided into a plurality of heat absorbing fins in order to increase the contact area with the combustion gas and increase the amount of heat back. The heat back is used as heat of combustion to save power in the heating heater 8, and the upper end is an inclined portion 28 that is inclined downward toward the burner portion 17 side and rises. It improves the release of combustion heat.

Reference numeral 29 denotes an L-shaped restraining plate provided above the endothermic fins 27, which projects from the vaporizer 1 side to about two-thirds above the endothermic fins 27 to cover the space between the endothermic fins 27 and the vertical groove, and rises between them. It suppresses the rising force of the coming combustion heat, and when it is projected until it covers the entire upper part of the endothermic fin 27, a slit or a hole is formed in the endothermic plate 29 itself to adjust the suppressing force. Is also good.

Reference numeral 30 denotes an uneven surface in which a plurality of laterally R-shaped convex portions are continuously formed on the back wall of the vaporizer 1 between the endothermic fins 27. -It is designed to obtain a backpack, and since it has an R shape in particular, it is possible to smoothly suppress only the ascending force without causing turbulence in the heat of combustion.

Reference numeral 31 denotes a combustion chamber surrounding the upper part of the burner portion 17, and the outer periphery thereof is covered with a cover frame 33 via an air chamber 32.

Reference numeral 34 denotes a combustion fan, which communicates with the injection port 3 and the air chamber 32 via the air passage 35, supplies the primary air for combustion to the injection port 3, and mixes the air chamber 32 through the side of the vaporizer 1. The secondary air supplied from the lower part of the chamber 12 to the secondary air supply portion 19 of the burner portion 17 and the air for cooling the combustion chamber 31 are supplied.

Reference numeral 36 denotes an electromagnetic pump that supplies fuel oil to the fuel injection nozzle 2 via an oil supply pipe 37, and reference numeral 38 denotes a heat shield plate.

Next, the operation of the first embodiment of the present invention will be described.
Now, if the heating heater 8 is energized and the vaporizer 1 is heated to a predetermined temperature, this is detected by a temperature sensor (not shown) provided in place to drive the combustion fan 34 and the electromagnetic pump 36. As a result, fuel oil is supplied from the fuel injection nozzle 2 to the vaporizer 1, and primary air for combustion is supplied from the injection port 3.

Then, in the vaporizer 1, the fuel oil injected from the fuel injection nozzle 2 collides with the flat surface of the vertical vaporization surface 6 and diffuses uniformly to the surroundings because there is no unevenness. Due to the blowing wind of the primary air supplied above, it moves sequentially along the meandering path, and the vaporization is promoted with sufficient vaporization time, and the primary air supplied by the unevenness of the bead 7 is also disturbed. A good mixed gas can be obtained by causing a flow and sufficiently mixing with the vaporized gas.

Further, the vaporized gas vaporized on the vertical vaporization surface 6 collides with the vertical vaporization surface 6 and is bounced off, and the upper and lower side walls 9 provided with a heating heater 8 in the horizontal bowl-shaped vaporizer 1.・ Although it flows to the 10 side, since the upper and lower side walls 9 and 10 are sufficiently heated by the heating heater 8, the vaporization of the vaporized gas is further promoted, the primary air is also satisfactorily heated, and the vaporizer. No. 1 is in the shape of a horizontal bowl, 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 5.

On the other hand, the mixed gas flowing out from the outlet 5 flows into the mixing chamber 12, and the mixing chamber 12 is heated for a certain period of time by the auxiliary heater 16 that is energized at the same time as the preheating of the vaporizer 1, and is preheated at a high temperature. Since the state is maintained, the inflowing mixed gas does not liquefy.

Then, after promoting the rectification in the rectifying chamber 13, the mixed gas immediately divides into a plurality of gas chambers 15 and flows into the gas chamber 15 from the flame hole of the flame hole portion due to the fine unevenness and the tapered shape due to the painted surface of the inner wall surface. The ejection speed of the mixed gas to be ejected is uniform as a whole regardless of the longitudinal direction, and the mixed gas passes through the rectifying chamber immediately before being ejected from the flame hole, is finally rectified and ejected, and is appropriately ignited (Fig. If it is ignited with (not shown), combustion will start.

Next, when the tip of the mixing chamber 12 becomes hot, for example, the air supply / exhaust pipe is extended beyond the construction range, or the air supply / exhaust pipe is exposed to wind, resulting in insufficient air supply. , The operation of the first embodiment of the present invention when the tip portion of the mixing chamber 12 becomes hot will be described.

In the case of insufficient air supply, the amount of mixed gas flowing into the mixing chamber 12 is less than that in the normal state of air supply, so that the cooling effect of the mixed gas is reduced, and the tip of the mixing chamber is compared to the root side where the vaporizer 1 is located. The temperature becomes high, and the flame formed at the tip is smaller than the flame at the root, and the flame at the tip is formed closer to the flame hole 18 than the flame at the root. Therefore, the tip of the mixing chamber 12 is further formed. The portion becomes hot, and as a result, a force is generated in which the tip portion of the burner portion 17 warps upward.

Conventionally, the fastening screw 26 is inserted into the screw hole 25 at the tip of the flange portion 22 of the burner portion 17 and screwed into the fastening hole 24 at the tip of the mixing chamber 12 to form the mixing chamber 12 and the burner portion 17. Although the tip portion was fastened, in this embodiment, the fastening force of the fastening screw 26 and the engaging force of the engaging portion 23 at the tip of the flange portion 22 engaging with the tip portion of the mixing chamber 12 are combined with the mixing chamber 12. The tip portion of the burner portion 17 is fastened, and even if the tip portion of the mixing chamber becomes hot and the tip portion of the burner portion 17 tries to warp upward, the engaging portion 23 having a substantially U-shaped cross section is mixed. Since the tip portion of the chamber 12 is caught, the tip portion of the burner portion 17 cannot be warped upward, and the tip portion of the burner portion 17 can be prevented from causing a flashback due to the warp upward. Is.

Further, since the engaging portion 23 is formed at the tip of the flange portion 22, even if a gap is formed between the mixing chamber 12 and the engaging portion 23, only the secondary air leaks and the mixed gas is released. Since there is no leakage, the engaging portion 23 can be formed at low cost without adversely affecting combustion.

As described above, the engaging portion 23 is formed at the tip of the burner portion 17, the engaging portion 23 is engaged with the tip portion of the mixing chamber 12, and the tip portion of the burner portion 17 is fastened. Since the tip portion of the mixing chamber 12 is fixed with the screw 26, even if the tip portion of the mixing chamber 12 becomes hot and the tip portion of the burner portion 17 tries to warp upward, the fastening force of the fastening screw 26 is engaged. The engaging force that the joint portion 23 engages with the tip portion of the mixing chamber 12 can prevent the tip portion of the burner portion 17 from warping upward, and the tip portion of the burner portion 17 warps upward. It is possible to prevent a flashback from occurring due to a gap between the mixing chamber 12 and the burner portion 17.

Further, since the engaging portion 23 is provided so that the tip thereof is formed in a substantially U-shaped cross section and the tip of the mixing chamber 12 is surrounded by the U-shaped portion, the tip portion of the mixing chamber 12 is provided. Even if the tip of the burner portion 17 tries to warp upward due to high temperature, the tip portion of the burner portion 17 is in a state where the engaging portion 23 having a substantially U-shaped cross section is caught by the tip portion of the mixing chamber 12. It is not possible to warp upward, and it is possible to further prevent the tip portion of the burner portion 17 from warping upward, and the tip portion of the burner portion 17 warps upward to form the mixing chamber 12 and the burner portion 17. It is possible to further prevent a flashback from occurring due to a gap between the two.

1 Vaporizer 2 Fuel injection nozzle 3 Injection outlet 5 Outlet 8 Heating heater 12 Mixing chamber 14 Secondary air chamber 15 Gas chamber 17 Burner part 18 Flame hole part 19 Secondary air supply part 23 Engagement part 26 Fastening screw

Claims (1)

A vaporizer equipped with a heating heater, a combustion air outlet and a fuel injection nozzle, and a mixed gas outlet at the bottom, a mixing chamber communicating with the outlet at the lower part of the vaporizer, and the like. The upper part of the mixing chamber is composed of a burner portion provided on the back side of the vaporizer, and the mixing chamber has a gas chamber communicating with the flame hole portion of the burner portion and a second air supply unit communicating with the secondary air supply unit. In a vaporization type oil combustion device in which secondary air chambers are alternately formed and the gas chamber and the secondary air chamber are tapered as they move away from the vaporizer, an engaging portion is engaged with the tip of the burner portion. The engaging portion is provided so that the tip thereof is formed in a substantially U-shaped cross section and the tip of the mixing chamber is surrounded by the U-shaped portion, and the engaging portion is formed in the tip portion of the mixing chamber. The tip portion of the burner portion is fixed to the tip portion of the mixing chamber with a screw , and the engaging portion is the further tip of the screw at the tip portion of the burner portion. A vaporization type oil combustion device characterized by being installed in a part.

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