JPH0364763B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention provides a preheating action by raw combustion of fuel, which enables the transition of fuel to vaporization combustion. This invention relates to a vaporizing burner that can reliably prevent raw combustion of fuel from falling into a complete combustion state and easily achieve an efficient preheating effect.

Conventional technology Conventionally, the tip side of a gas generating body has an air outlet on one side and a vaporization chamber inside, and the inside serves as a gas chamber, and a part of the vaporized combustion flame is ejected toward the gas generating body on the surface. It is connected to a combustion body equipped with a combustion part, and the tip of the fuel supply pipe is exposed inside the gas generator on the side of the air outlet, and the fuel is injected with forced air from one side of the air outlet of the gas generator to generate gas. The gas generating body is preheated by live combustion in the body, and then the combustion flame is ejected from the combustion part provided on the surface of the combustion body, and further, the temperature inside the gas generating body is raised to the vaporized gas generation temperature by the preheating action. When this occurs, the fuel supply is temporarily interrupted to stop the raw combustion, and then the fuel supply is restarted, and the supplied fuel is evaporated and vaporized by the preheating action. At the same time, the vaporized gas generated is stirred with forced air. A part of the mixed gas is ejected from the combustion surface of the combustor toward the gas generating body, and the gas generating body is constantly preheated by the vaporized combustion flame of the mixed gas, resulting in vaporization combustion. A vaporizing burner designed to continue this process was published before the present application, for example, in Japanese Patent Publication No. 58-21167.
It is publicly known as being described in Japanese Patent Publication No. 58-97420, Japanese Patent Publication No. 58-21170, and Japanese Utility Model Application Publication No. 58-97420, respectively.

Problems to be Solved by the Invention Incidentally, in the above-mentioned publicly known type of vaporizing burner, the combustion body to which the tip side of the gas generating body is connected is formed in a completely sealed shape, and the surface of the combustion part is not exposed to the mixed gas. The vaporization chambers and gas chambers provided in the gas generator and combustion body were also narrow, probably because the flame holes were just large enough to allow injection and combustion.

Therefore, when using a narrow vaporizing chamber or gas chamber such as the one mentioned above, and forcing the fuel to live burn to start combustion, even if there is a slight error in the amount of fuel supplied at the time of ignition, Incomplete combustion occurs, such as soot getting mixed into the raw combustion flame, making it impossible to preheat the gas generator as expected. This has resulted in a problem in that the particles adhere to and accumulate in the combustion section, reducing the subsequent evaporation of the fuel and the efficiency of the mixed gas, making it impossible to continue good vaporization and combustion.

Therefore, the present invention has an openable and closable flame exhaust window that can blow live combustion flame toward the gas generating body on the tip side of the combustion body, so that when starting combustion, the fuel is discharged into the gas for preheating effect. By providing a vaporizing burner that can achieve a good preheating effect by reliably eliminating incomplete combustion in which soot and the like are generated even when raw combustion occurs in the generator, the above-mentioned It is a problem solved.

Means for Solving the Problems Therefore, the technical problem of the present invention is to completely perform live combustion of fuel even in a narrow gas generating body, thereby effectively preheating the gas generating body. .

In order to solve this technical problem, we have developed a gas generating body with one side serving as a ventilation port and an interior as a vaporization chamber. The gas generator is connected to a combustion body equipped with a combustion section that blows flame toward the gas generator, and a fuel supply pipe is installed inside the gas generator on the side of the air outlet to supply fuel and transition from initial raw combustion to vaporization combustion. In the gas generating body, a flame exhaust window is opened on the front end side of the combustion body for discharging the raw combustion flame generated in the gas generating body toward the outer peripheral wall surface of the gas generating body, and the flame exhaust window is provided with a closing valve. This is a vaporizing burner characterized by opening and closing.

Operation The technical method and device described above operate as follows.

In FIGS. 1 to 3, when starting combustion, first open the flame exhaust window 12, and then live burn the fuel inside the vaporization chamber 4 of the gas generator 1. The combustion flame enters the gas chamber 7 in the combustion body 5 from the tip side of the gas generating body 1 and then exits from the flame exhaust window 12. Even if the raw combustion flame flows through the narrow gas generating body 1 and the combustion body 5 in this way, the raw combustion flame generates soot etc. because the flame exhaust window 12 is opened at the tip of the combustion body 5. The gas generating body 1 is completely combusted without being in an incomplete combustion state, and the gas generating body 1 is intensely preheated from both the inside and outside by the combustion flame flowing through the gas generating body 1 and the raw combustion flame ejected from the flame exhaust window 12. The temperature of the combustion body 5 is also raised at the same time as the internal temperature is raised to the evaporation temperature of the fuel.

When the inside of the gas generating body 1 is preheated to a temperature sufficient to evaporate the fuel by the preheating effect of the raw combustion flame, the closing valve 13 is lowered and the flame exhaust window 12 is opened.
At the same time, the continuation of raw combustion is temporarily stopped, and then fuel is sprayed and scattered into the vaporization chamber 4 of the gas generating body 1 again.

Then, the atomized fuel is quickly evaporated and vaporized by the preheating action, and the generated vaporized gas is mixed with the circulating forced air to form a complete mixed gas, which is then pressurized into the combustion body 5 and then combusted. A vaporized combustion flame is emitted from the section 6, and the gas generating body 1 is heated by the thick part of the vaporized combustion flame.

Therefore, after the occurrence of vaporization combustion, the gas generating body 1
is heated by a part of the vaporizing combustion flame, so
The continuously supplied atomized fuel quickly turns into a mixed gas and is vaporized and combusted, allowing good vaporization and combustion conditions to continue for a long period of time.

Further, the vaporizing burner of the second embodiment shown in FIGS. 4 and 5 has a combustion body 5' arranged concentrically around the outer periphery of the gas generating body 1', and a combustion body 5' that is concentric with the gas generating body 1'. Since the side is connected by the communication pipe 9,
Its operation is exactly the same as the vaporizing burner of the first embodiment shown in FIGS. 1-3.

Embodiments The vaporizing burner structure according to the present invention will be described with reference to preferred embodiments shown in the accompanying drawings.

The one shown in FIGS. 1 to 3 is a vaporization burner that blows vaporization combustion flame upward,
The distal end side of a horizontally oblong gas generator 1 has an air outlet 2 on one side and a vaporization chamber 4 inside. The gas generating body 1 on the side of the air outlet 2 connected to the blower 3 is connected via a communicating pipe 9 to an oblong combustion body 5 equipped with a combustion section 6 in which a large number of flame holes 8 are bored upward. Inside is a fuel supply pipe 10 for spouting raw fuel toward the vaporization chamber 4.
and a spark plug 11 for raw combustion of the spattered fuel.
1 allows raw combustion to preheat not only the gas generating body 1 but also the combustion body 5 at the start of combustion.

A flame exhaust window 12 is opened on the upper surface of the tip side of the upper air combustion body 5, and the flame exhaust window 12 is opened to allow the raw combustion flame generated to be discharged toward the gas generating body 1. It is open and closed.

The above-mentioned closing valve 13 maintains an open state in the raw combustion state, that is, when the inside of the gas generating body 1 has not been preheated to a temperature sufficient to evaporate the fuel, and when the inside of the gas generating body 1 is in the state of burning fuel. The valve opening/closing device 14 automatically closes the flame exhaust window 12 after the temperature has been preheated to a temperature sufficient to vaporize the flame.
is operated by. The above-mentioned valve opening/closing device 1
4 is configured as follows. That is, an operating rod 1 whose central portion is pivotally connected to the end of the core shaft 16 of the electromagnet
An engaging portion 20 provided at the lower part of a valve shaft 19 having a closing valve 13 attached to its upper end is fitted into an elongated hole 18 provided at the other end of the operating rod 17. It has a configuration in which a restoring bomb 22 is interposed between a support 21 attached to the shaft 19 and the bottom wall of the combustion body 5, and the upper air electromagnet 15 is electrically connected at the time of starting combustion (in a live combustion state). The actuating rod 17 is rotated clockwise about the pivot point by suction action by the valve shaft 1.
9 is moved upward by overcoming the elasticity of the restoration bullet 22,
The blockage valve 13 is operated to the open side, and the gas generator 1
When the heat-sensitive switch 23 installed at an appropriate location on the combustion body 5 confirms that the interior has been preheated to a temperature sufficient to evaporate the fuel by the heating of the raw combustion flame, the power to the electromagnet 15 is immediately cut off and the blockage valve is closed. 13 is lowered by the restoring bullet 22 to close the flame evacuation window 12. Note that the oil supply pipe 10 may be a drip type oil supply pipe as shown by the chain line in the figure. 24 is a spark plug for vaporization combustion.

Therefore, after the gas generating body 1 has been sufficiently preheated by the raw combustion flame, if the continuation of the raw combustion is interrupted and only the fuel is sprayed into the gas generating body 1, the fuel will be quickly heated. The vaporized gas is evaporated and mixed with the forced wind to form a mixed gas, which rises as a fumarole from a large number of flame holes 8 and heats the gas generator 1, so vaporized gas is continuously generated. It is possible to continue vaporization combustion for a long period of time.

Other examples of the vaporization burner are shown in FIGS. 4 and 5. The vaporizing burner of this other example has a combustion body 5' disposed concentrically around the outer periphery of a gas generation body 1', and the tip of the gas generation body 5' and the combustion body 5' are connected to a communicating pipe 9. The structure other than the communication by ' is the same as the vaporizing burner of the first embodiment, and its operation is also the same as that of the first embodiment except that the vaporizing combustion flame is ejected forward in the vaporizing burner of the other example. Same as vaporizing burner.

6 and 7 show a vaporizing burner equipped with another example of the valve opening/closing device 14. In FIG. Another example of the valve opening/closing device 14' is such that the closing valve 13 is opened and closed by a heat-sensitive spring 25, for example, a shape memory alloy such as nickel or titanium, and the heat-sensitive spring 25 is used to open and close the closure valve 13. The valve shaft 19 with a closing valve 13 housed in a through hole is housed in a cylindrical spring protection cylinder 26 that is housed inside the combustion body 5 at the opening position of 12, and is housed in a wrapped state, and the combustion The lower end of the valve shaft 19, which projects downward from the bottom wall of the body 5, is constructed such that its substantially central portion is brought into contact with one end of an operating rod 17 which is pivotally connected, and the other end is brought into contact with a switch 27.

Therefore, when starting combustion, when the fuel oil sprayed from the fuel supply pipe 10 is in a state of raw combustion in the gas generating body 1, the heat-sensitive spring 25 is not heated to the predetermined temperature, so it must be stored. The obstruction valve 13 is lowered by its own weight so that the flame exhaust window 12 is in an open state to continue live combustion, but the gas generator 1
When the temperature inside the fuel tank reaches a temperature high enough to evaporate the fuel by the heating of the raw combustion, the heat-sensitive spring 25 also automatically expands and the closing valve 13 automatically closes the flame exhaust window 12. Simultaneously operating rod 1
Turn on the switch 27 by pressing 7 and open the oil supply pipe 1.
0 is operated to temporarily cut off the fuel supply to
Stop live combustion. After the raw combustion is stopped, fuel is again supplied into the gas generating body 1 through the fuel supply pipe 10 after a certain time lag, and a mixture of gases is generated and a vaporized combustion flame is ignited to generate gas. By heating the body 1, subsequent vaporization combustion can be continued for a long period of time.

Effects of the Invention In short, since the present invention has the above-mentioned configuration, even if one side of the gas generator 1 has the air outlet 2 and the inside has the vaporization chamber 4, the tip side of the gas generator 1 has the gas chamber 7 inside. The combustion body 5 is connected to a combustion body 5 having a combustion part 6 on the surface of which blows a part of the vaporized combustion flame toward the gas generation body 1, and fuel is supplied into the gas generation body 1 on the side of the air outlet 2 for initialization. Even if the gas generating body 1 is heated by the raw combustion flame by providing a refueling pipe 10 for transitioning from raw combustion to vaporization combustion, the raw combustion flame is provided at the tip side of the combustion body 5. Is it possible to exhaust the flame toward the gas generating body 1 through the flame exhaust window 12, achieve complete combustion of the raw fuel, and raise the temperature inside the gas generating body 1 to a temperature that evaporates the fuel in a short time? Complete raw combustion prevents soot and the like from accumulating inside the gas generating body 1 and the combustion body 5, which not only improves subsequent generation of vaporized gas but also closes the flame exhaust window 12. When the valve 13 is closed, the generated mixed gas is forced to burn through the combustion section 6,
A part of the gas generating body 1 is heated to promote the generation of vaporized gas, thereby producing an effect that good vaporization combustion can be continued for a long period of time.

[Brief explanation of drawings]

The drawings show each embodiment of the vaporizing burner according to the present invention, and FIGS. 1 to 3 show the vaporizing burner of the first embodiment, and FIG. 1 shows the flame exhaust window in an open state. Partially cutaway vertical front view of the case, 2nd
The figure is a partially cutaway vertical front view with the flame exhaust window closed, Figure 3 is a side sectional view taken along the line A-A in Figure 1, and Figures 4 and 5 are the vaporization burners in other rows. 4 is a front view, FIG. 5 is a partially cutaway vertical side view, and FIGS. 6 and 7 are vaporizing burners equipped with other examples of valve opening/closing devices, and FIG. 7 is a partially cutaway vertical front view with the flame exhaust window in the open state, and FIG. 7 is a partially cutaway vertical front view with the flame exhaust window in the closed state. DESCRIPTION OF SYMBOLS 1... Gas generator, 2... Air outlet, 4... Vaporization chamber, 5... Combustion body, 6... Combustion part, 7... Gas chamber, 10... Fuel supply pipe, 12... Flame exhaust window, 13...
Occlusion valve.

Claims (1)

[Scope of Claims] 1. One side of the gas generating body has an air outlet and the inside is a vaporizing chamber, and the tip side of the gas generating body has a gas chamber inside, and a part of the vaporized combustion flame is jetted toward the gas generating body on the surface. The combustion body is connected to a combustion body equipped with a combustion section that generates flames, and is provided with an oil supply pipe that supplies fuel into the gas generating body on the side of the air outlet to transition from initial raw combustion to vaporization combustion. On the tip side, a flame exhaust window is opened for discharging the raw combustion flame generated in the gas generating body toward the outer peripheral wall surface of the gas generating body, and a closing valve is provided in the flame exhaust window to indicate when it is opened or closed. Characteristic vaporizing burner. 2. The above-mentioned closure valve that opens and closes the flame exhaust window moves upward to open the flame exhaust window due to the adsorption action of an electromagnet when energized during initial raw combustion, and also moves upward to open the flame exhaust window due to the elasticity of the resurfacing bomb during vaporization combustion. 2. The vaporizing burner according to claim 1, wherein the vaporizing burner is mounted on a valve shaft that is moved downward toward the side that closes the window. 3. A patent claim characterized in that the above-mentioned closure valve for opening and closing the flame exhaust window is mounted on a valve shaft that is moved up and down within a spring protection cylinder by a heat-sensitive spring housed in a spring protection cylinder installed in the combustion body. The vaporizing burner according to item 1.