JPH0210335B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention effectively uses part of the combustion hot air generated by starting the burner to actively heat and raise the temperature of the gas chamber and the inner and outer cylinders of the air blower. Not only at the start of vaporization combustion, but also after the transition to vaporization combustion, the generated air-fuel mixture is reliably prevented from being liquefied and combusted in a red flame by the cooling effect, and is always kept in a blue flame state. The present invention relates to a vaporizing burner that can stably continue vaporizing combustion.

Prior Art Conventionally, when fuel is automatically transferred from a raw combustion state to a vaporization combustion state by a rotating vaporization cylinder,
During the process in which the generated mixed gas flows toward the gas chamber along the outer circumferential surface of the blast tube, it is liquefied by the cooling effect of contact with the blast tube, becomes unvaporized fuel, remains at the bottom of the gas chamber, and is vaporized. In order to solve the problem that red flame is mixed into the combustion flame and good green flame vaporization combustion cannot be continued for a long period of time, the blow tube is made of a double structure type with a hollow inside, or The vaporizing burner, which uses a heating ventilator with a heating resistor embedded inside to prevent the liquefaction of mixed gas, was developed before this application, for example, in 1983.
It was developed by the present applicant and is known as described in Japanese Patent Application Laid-Open No. 35606 or Japanese Patent Application Laid-open No. 188914/1983.

Problems to be Solved by the Invention By the way, in the case of a double-structured blower tube like the above-mentioned known vaporizing burner, when the normal temperature of the combustion air flowing through it is relatively high, it is possible to use it as a means of preventing cooling. However, once the temperature is low, the cooling prevention effect is significantly reduced, and the mixed gas quickly liquefies and condenses, remaining in the gas chamber and burning as a red flame. occurs. In addition, although heat-generating ventilation tubes are highly effective, they consume a lot of electricity, and many disconnection accidents occur during use, making it difficult to maintain stable vaporization combustion over a long period of time. There was a problem that it became expensive and unsuitable for general users.

Not only that, but the mixed gas pressurized into the gas chamber is
When the combustion tube that forms the gas chamber is at a low temperature, the cooling effect caused by contact with the wall surface of the combustion tube causes liquefaction and condensation in the gas chamber, causing unvaporized fuel to remain in the gas chamber and causing vaporization combustion. It is not possible to prevent the red flame from mixing with the green flame for a considerable time after startup, and this phenomenon of liquefaction and dew condensation tends to increase when the vaporizing burner is used in cold regions. This is something that was strongly desired to be improved. In view of this, the present invention aims to direct a portion of the hot combustion air ejected forward from the combustion chamber by starting the vaporizing burner to the outer periphery of the combustion tube through a hot air inlet provided all around the tip side of the combustion tube. The combustion cylinder and the entire gas chamber are heated and heated by being forcibly introduced into the hot air distribution chamber arranged to envelop the entire body, and the combustion hot air introduced into the hot air distribution chamber is further inserted into the vaporization cylinder through openings. The hot air is circulated along the return passage formed between the outer blower cylinder and the inner blower cylinder to be discharged into the vaporizer cylinder, actively heating and raising the temperature of the outer blower cylinder and the inner blower cylinder, and then vaporizing the air. During the flow process, the mixed gas generated in the cylinder reaches the gas chamber, so that it does not quickly liquefy due to contact with the cooled blower cylinder and the gas chamber. It is an object of the present invention to provide a vaporizing burner that can stably obtain vaporizing combustion of blue flame.

Means for Solving the Problems Therefore, the technical problem of the present invention is that the mixed gas generated in the vaporizing cylinder is liquefied in the flow process leading to the gas chamber and by the cooling effect in the gas chamber, causing a red flame state. To easily and surely eliminate the problem of combustion being continued for any length of time, and to cause stable vaporization combustion of blue flame from the time of starting ignition. In order to solve this technical problem, we specifically designed this configuration. A hot air circulation chamber is provided around the entire outer circumference of the combustion tube in which the gas chamber is installed, and the introduction side of the hot air circulation chamber extends over the entire circumference of the tip side of the combustion tube. Connect to the hot air inlet provided in the
In addition, the discharge side is connected to a hot air return passage formed between an inner blower cylinder and an outer blower cylinder, each of which has an opening inserted into the vaporizer cylinder, which rotates with the inside communicating with the gas chamber in the combustion cylinder. In addition, the hot air inlet is a vaporizing burner characterized in that the hot air inlet is connected to a combustion chamber disposed inside the gas chamber.

Action The above technical means works as follows (see Figures 1 and 2). If you start the burner now,
As the carburetor 8 is rotated at high speed, combustion air is blown into the carburetor 8 from the blower chamber 3, and at the same time, the combustion air passes through the carburetor 8 and reaches the gas chamber 6, and then the gas chamber 6. The gas is injected into the combustion chamber 5 through a larger number of gas ejection holes 7.

When fuel is supplied under this condition, the fuel is transferred to the vaporization tube 8 while being diffused by the rotating fuel oil diffuser 24, and then further transferred along the inner surface of the vaporization tube 8. After being further atomized by the diffusion action of 8 and the injection action of combustion air, the particles are sprayed into the combustion chamber 5 from the open end of the vaporization cylinder 8, and ignited to cause raw combustion. Then, the entire vaporization tube 8 is heated by the generated raw combustion flame, and at the same time, a part of the combustion hot air jetted forward is transferred to the hot air inlet provided all around the tip side of the combustion tube 2. 1
9 into the base end of the hot air distribution chamber 17, and while flowing through the hot air distribution chamber 17 toward the discharge side, not only the combustion tube 2 but also the entire gas chamber 6 is heated to raise the temperature. After heating the combustion tube 2 and the gas chamber 6 as a whole, the combustion hot air is further transferred to the combustion tube 2.
The hot air returns through a hot air return passage 22 formed between an outer blower cylinder 20 and an inner blower cylinder 21, each of which has an opening inserted into the vaporizer cylinder 8, which rotates with the inside communicating with the gas chamber 6. The hot combustion air is discharged into the vaporization cylinder 8 and flows through the outer blower cylinder 20 and the inner blower cylinder 21, and the temperature is quickly heated and raised.

Therefore, after the raw combustion flame is generated, the fuel sent into the vaporization cylinder 8 is rapidly evaporated and vaporized during diffusion transfer, and the generated vaporized gas is stirred and mixed with the circulating combustion air. The mixed gas becomes a complete mixture and is forced into the gas chamber 6, and finally is ejected into the combustion chamber 5 from the numerous gas injection holes 7 and vaporized and burned.

By the way, at the time of starting the ignition of vaporization combustion as described above, the combustion tube 2, the gas chamber 6, and the blower outer tube 2 are
0 and the blower inner cylinder 21 are heated and heated by the hot combustion air flowing together, so the air is pressurized and stored in the gas chamber 6 while coming into contact with the mixed gas generated in the vaporizer cylinder 8 and the blower outer cylinder 20. However, unlike conventional vaporization burners, the phenomenon of liquefaction due to cooling does not occur, and all of the generated air-fuel mixture is vigorously combusted into the combustion chamber 5, and the vaporization cylinder 8 is filled with vaporization combustion flames. By heating and continuously generating mixed gas, it is possible to stably perform vaporization combustion of blue flame without red flame from being mixed in from the time of ignition start of vaporization combustion.

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

In Figures 1 and 2, reference numeral 1 agitates and mixes vaporized gas that is evaporated by raw combustion of fuel with combustion air to form a mixed gas, and the resulting mixed gas is transferred to the combustion tube 2. The vaporizing burner 1 is a vaporizing burner capable of performing jet combustion from a gas chamber 6 disposed over the entire inner circumference, and is constructed as follows. That is, the combustion tube 2 has a bottomed cylindrical shape with an open tip side and an opening at the center of the base end and the bottom wall side, and the ventilation chamber 3 is adjacent to the bottom wall side.
A combustion chamber 5 is formed inside the combustion chamber 5 on the inner peripheral surface side of the combustion chamber 4, and a bottomed cylindrical combustion disk 4 is provided with an opening having a larger diameter than the opening of the combustion tube 2 at the center of the bottom wall. The tip side is attached to the tip side of the combustion tube 2 to form a gas chamber 6 between the combustion tube 2 and the combustion disk 4, and the tip side cylinder wall of the combustion disk 4 has a large number of gas ejection holes 7... perforate.

Reference numeral 8 denotes a cylindrical vaporization tube with a closed tip and an open base end, and the vaporization tube 8 is attached to the tip of a rotating shaft 9 inserted into the combustion tube 2 from the blowing chamber 3 side. A hollow cylindrical air mixture 10 with a fuel scattering end 11 at the distal circumferential end is integrally attached to the proximal open end of the carburetor 8 with a fuel scattering gap 12 therebetween. It is attached to.

An annular fumarole chamber 13 is provided around the central opening of the combustion disk 4 in a bulging shape to face the gas mixture 10, and in the gap between the gas mixture 10 and the fumarole chamber 13. A partition wall 14 with the tip side bent outward is arranged to divide the gap into two, and a fumarole port 15 is opened in an annular shape inside the fumarole chamber 13.
The combustion air that has been aerated is divided into two parts and injected into the combustion chamber 5, thereby preventing burnout of the combustion disk 4 and atomizing the scattered fuel.

In addition, the above-mentioned fumarole chamber 13 has a plurality of wind guide pipes 16.
... is connected to the blowing chamber 3 to blow a part of the combustion air into the fume chamber 13. 17 is a hot air circulation chamber formed between the combustion tube 2 and an outer tube 18 disposed on the outer peripheral side of the combustion tube 2 so as to enclose the entire gas chamber 6; teeth,
By extending the tip side of the outer cylinder 18 forward from the tip side of the combustion tube 2 and then bending it toward the combustion chamber 5, a hot air inlet is opened all around the tip side of the combustion tube 2. It is connected to the combustion chamber 5 via 19.
Further, on the discharge side of the hot air circulation chamber 17, there is a blower outer cylinder 20 that is deeply inserted from the central opening of the combustion cylinder 2 toward the distal end side of the vaporization cylinder 8, and a blowing outer cylinder 20 that extends from the central opening of the hot air circulation chamber 17 to the vaporization cylinder 8. A part of the combustion hot air ejected from the combustion chamber 5 is transferred from the hot air inlet 19 by connecting it to the annular hot air return passage 22 formed between the blower inner cylinder 21 and the blower inner cylinder 21 that is deeply inserted into the front end of the combustion chamber 5 and facing the front end of the combustion chamber 5. After being introduced into the hot air circulation chamber 17, the hot air is made to flow through the hot air return passage 22, and is then passed through the combustion tube 2, the gas chamber 6, and the blower outer tube 2.
0, and the air blowing inner cylinder 21 is actively heated to increase its temperature.

Therefore, with the above configuration, the blowing chamber 3 and the vaporizing tube 8 are connected by the blowing inner tube 21, and the mixed gas passage formed between the vaporizing tube 8 and the blowing outer tube 20 is connected. 23 is connected to the gas chamber 6.

An inverted conical fuel diffuser 24 is fixed to the tip of the vaporization tube 8 so as to face the openings at the ends of the outer blower tube 20 and the inner blower tube 21, and an oil feed pipe 25 is attached to the outer surface of the fuel diffuser 24. The tips of the two are opened close together. 26 is an ignition plug disposed within the combustion chamber 5.

In the embodiment shown in FIGS. 3 and 4, the vaporized gas evaporated by raw combustion of fuel is stirred and mixed with combustion air to form a mixed gas, and the resulting mixed gas is This is a vaporizing burner 1' that can make gas rise into a fumarole flame from a gas chamber 6' disposed on the bottom wall side of a combustion tube 2'. The length of the combustion tube 2' is shorter than that of the vaporizing burner 1 shown in FIG. 1, and an opening is provided at the center of the bottom wall of the combustion tube 2'.
On the bottom wall side of the combustion tube 2', a horizontal combustion plate 4' is provided with an annular bulge in the center and a peripheral wall 27 between the center opening and the bulge is inclined downward. and the bottom wall side of the combustion tube 2' and the combustion plate 4'.
A gas chamber 6' is formed between the combustion plate 4' and a large number of gas ejection holes 7' are formed upwardly in the surface of the combustion plate 4'. Then, an annular jet duct 28 is formed between the gas mixture 10, which is integrally attached to the base end open side of the carburetor 8 with a fuel scattering gap 12 therebetween, and the peripheral wall 27 of the combustion plate 4'.
8 is connected to the ventilation chamber 3 via a plurality of air guide pipes 16', and the air guide pipes 16' are connected from the ventilation chamber 3 to the air guide pipe 16'.
By injecting a part of the combustion air from the blow-off passage 28 through the air, a part of the mixed gas flows between the combustion pipe 2' and the combustion plate 4' from the communication part between the vaporization pipe 8 and the gas chamber 6'. This prevents the fuel from being combusted in the combustion chamber 5' provided inside, and also prevents the fuel from being burned at the fuel-splattered end 11 of the air-fuel mixture 10.
The configuration of the main parts other than those that promote the atomization of the dispersed fuel, that is, the hot air circulation chamber 17, the outer cylinder 1
8, hot air inlet 19, outer cylinder 20, inner cylinder 2
1, and the hot air return passage 22 as shown in FIGS. 1 and 2.
It is formed substantially the same as the vaporizing burner 1 having the basic inventive structure shown in the figures, and can perform the same effect.

Effects of the Invention In short, since the present invention has the above-described specific configuration, a part of the hot combustion air emitted from the combustion chamber 5 during the operation of the burner is transferred to the hot air provided all around the tip side of the combustion tube 2. Not only the combustion tube 2 introduced into the hot air circulation chamber 17 through the inlet 19 but also the gas chamber 6 disposed inside the combustion tube 2 are efficiently heated and heated, and the gas introduced into the hot air circulation chamber 17 is heated. A blower outer cylinder 2 has openings that allow combustion hot air to be inserted into the vaporizer cylinder 8 which rotates while the inside thereof is in communication with the gas chamber 6.
The hot air can be circulated through the hot air return passage 22 formed between the air blower outer cylinder 20 and the air blower inner cylinder 21 to actively heat and raise the temperature of the air blower outer cylinder 20 and the air blower inner cylinder 21,
As a result, the mixed gas generated in the vaporization cylinder 8 at the time of ignition start of vaporization combustion is cooled while it is stored in the gas chamber 6 and when it is pressurized into the gas chamber 6 along the blower outer cylinder 20. It reliably prevents the gas from being liquefied and combusted in a red-hot state by contact with the gas chamber 6 and the blower cylinder 20, and the complete air-fuel mixture is blown out more vigorously than when starting the ignition for vaporization combustion. This produces the effect that stable green flame vaporization combustion can be performed.

[Brief explanation of drawings]

The drawings show an embodiment of a vaporizing burner according to the present invention, and FIGS. 1 and 2 show a vaporizing burner in which a gas chamber is disposed over the entire inner circumference of a combustion cylinder, and FIG. 2 is a vertical sectional front view with a part cut away.
The figure is a longitudinal cross-sectional plan view in the direction of the arrow A-A in Figure 1, and Figure 3.
Figures 3 and 4 show a vaporizing burner in which a gas chamber is provided on the bottom wall side of the combustion tube, and Figure 3 is a longitudinal sectional front view with a part cut away, and Figure 4 is Figure 3 B-B. FIG. 1, 1'... vaporization burner, 2, 2'... combustion tube,
4, 4'... Combustion plate, 5, 5'... Combustion chamber, 6,
6'... Gas chamber, 8... Vaporization tube, 17... Hot air distribution chamber, 19... Hot air inlet, 20... Air blowing cylinder,
21...Blower inner cylinder, 22...Hot air return passage.

Claims (1)

[Claims] 1. A hot air circulation chamber is arranged around the entire outer circumference of a combustion tube in which a gas chamber is installed, and the introduction side of the hot air circulation chamber is connected to a hot air inlet provided around the entire circumference of the tip side of the combustion tube, and a discharge The side is connected to a hot air return passage formed between an inner blower cylinder and an outer blower cylinder, each of which has an opening inserted into the vaporizer cylinder which rotates in a state in which the inside communicates with the gas chamber in the combustion cylinder. , a vaporizing burner characterized in that the hot air inlet is connected to a combustion chamber arranged inside the gas chamber.