JPH053853Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Purpose of the Invention] (Field of Industrial Application) The present invention relates to a vaporization burner that vaporizes and burns liquid fuel such as petroleum.

(Prior art) In a conventional vaporization type oil-burning burner, vaporized oil gas and air supplied from a nozzle are mixed in the burner body, and the mixture is passed into the combustion chamber from the flame port of the burner head provided at the tip of the burner body. A mixed gas is ejected, and the mixed gas is combusted in this combustion chamber.

(Problem to be solved by the invention) Conventionally, in such a vaporizing oil-burning burner, the oil vaporized gas and air were not mixed well in the burner body, and as a result, the primary flame at the burner became blue. Even if it is a flame, the secondary flame is a yellow flame.

It is an object of the present invention to provide a vaporization burner in which vaporized gas and air are completely mixed and good blue flame combustion can be obtained.

[Structure of the idea]

(Means for solving the problem) The present invention provides an outer cylinder 15 inside a cylindrical combustion cylinder 11.
and the inner cylinder 17 are fitted concentrically, so that the space between the outer cylinder 15 and the inner cylinder 17 is shielded, and the inner cylinder 17
The tip of the burner head 21 is formed to be shorter than the tip of the outer cylinder 15, and a mixing chamber 34 is formed inside the outer cylinder 15. A combustion chamber 64 is provided at the inner cylinder 17, and a nozzle 44 for ejecting vaporized gas is provided at the base end side of the inner cylinder 17.
4, a primary air supply port 41 is opened in the inner cylinder 17, and a secondary air passage 62 is provided between the combustion cylinder 11 and the outer cylinder 15 for supplying secondary air to the combustion chamber 64, A resistive plate 32 is provided in the outer cylinder 15 inside the burner head 21, and a concave diffuser 36 is disposed in the center of the resistive plate 32, facing the tip spout 35 of the inner cylinder 17. It's a burner.

(Function) In the present invention, the fuel vaporized gas and air ejected from the inner cylinder 17 collide with the inner surface of the diffuser 36, become violently turbulent within the concave surface, and are stirred, and then diffused into the mixing chamber 34. Further, in the process of passing between the diffuser 36 and the outer cylinder 15, it is compressed and then diffused, and by receiving such action, the vaporized gas and air are completely mixed, and the mixed gas is fed to the burner head 21. flame mouth 24
The air is injected into the combustion chamber 64 and burned with blue flame in the combustion chamber 64 while being supplied with sufficient oxygen from the air supplied through the secondary air passage 62 on the outer periphery of the outer cylinder 15 .

(Examples) Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings.

A combustion tube 11 formed into a cylindrical or polygonal cross-section is fixed to a base 13 via a mounting plate 12.

Inside the combustion tube 11, an outer tube 15, which is formed by welding two flow regulating plates 14 formed in a flange shape, is fitted in a concentrically aligned manner.
5, an inner cylinder 17 is fitted and welded concentrically through two annularly formed shielding plates 16 having a U-shaped cross section, and is welded to the inner side of the combustion cylinder 11. The cylinder 15 and the inner cylinder 17 are integrally constructed. Like the combustion tube 11, the outer tube 15 and the inner tube 17 are also formed into a cylindrical shape or a polygonal cross section. These cylinders 11, 15, 17 are
Made by roll forming or cutting pipe.

A burner head 21 is provided at the opening at the tip of the outer cylinder 15. This burner head 21 is connected to the outer cylinder 1.
A concave frame plate 22 is inserted into the opening at the tip of the frame plate 22 and is welded airtightly over the entire circumference. It is fitted. A large number of burner ports 24 are formed on the convex portion of the burner port plate 23. The flame port 24 is located inside an annular protrusion 25 formed at the edge of the opening at the tip of the outer cylinder 15 .

Furthermore, the outer cylinder 15 is located inside the burner head 21.
A resistance plate 32, which is formed by integrally extending a mesh-like wire mesh 31, is fitted and welded to the inner circumferential surface of the resistance plate 32. This resistance plate 32 is provided with a large through hole 33. The wire mesh 31 and the resistance plate 32 serve as a resistor for the mixed gas of vaporized gas and primary air, and function to reduce the pressure.

The tip of the inner tube 17 is formed shorter than the tip of the outer tube 15, and a mixing chamber 34 is formed inside the outer tube 15 without the inner tube 17.

Furthermore, an inner cylinder 17 is provided at the center of the resistance plate 32.
A concave (rump-shaped) diff user 36 facing the tip spout 35 is positioned and welded. This diff user 36 mixes primary air with petroleum vaporized gas ejected from the inner cylinder 17, and has a recess 37 formed therein with a diameter larger than that of the inner cylinder 17. A positioning hole 38 is provided in the positioning hole 3.
8 and a dowel 39 integrally formed in the center of the resistance plate 32, this diff user 36 becomes concentric with the inner cylinder 17, the resistance plate 32, and other burner components. It is installed in a centered position. A conical surface 40 is formed on the resistance plate side of the differential user 36.

In this way, the central hole 38 of the differential user 36
Since it is fitted with the dowel 39 at the center of the resistance plate 32, there is no need for adjustment work to align the diff user 36 during the manufacturing process, and stable blue flame combustion can be obtained by alignment.

A primary air supply port 4 is provided on the base side of the inner cylinder 17.
1 is open, and a primary air supply gap 42 is provided between it and the base 13.
Furthermore, a nozzle 44 having a smaller diameter than the inner cylinder 17 is hermetically fitted into an opening 43 formed in the base 13, and the tip of this nozzle 44 is inserted into the primary air supply port 41. That is, the protrusion dimension b of the tip of the nozzle 44 is provided so as to be larger than the dimension a of the primary air supply gap 42 . In this way, by establishing the relationship a<b, even if primary air is not pressurized and supplied to the primary air supply gap 42, the primary air supply port 41 can be kept in a negative state by the petroleum vaporized gas ejected from the nozzle 44. This causes the primary air to be sucked into the primary air supply port 41 from the primary air supply gap 42.

A combustion air supply port 51 is formed on the base side of the combustion tube 11, and a U-shaped ring is formed between the combustion tube 11 and the outer tube 15 on the base side of the combustion air supply port 51. Pressure regulating plate 52 in cross section
are fitted and welded. This pressure regulating plate 5
2 is provided with a large number of ventilation holes 53, and a part of the air pressurized and supplied to the combustion air supply port 51 is
As primary air through the ventilation holes 53 of the pressure regulating plate 52,
A primary air supply gap 54 formed between the outer cylinder 15 and the base 13 and the primary air supply gap 42
The air is supplied to the primary air supply port 41 around the nozzle 44 through the air.

The pressure regulating plate 52 is formed using punching metal, metal lath, or the like, or by punching a large number of small holes in a formed metal plate.

Further, a ventilation hole 61 is also provided in the baffle plate 14, and the combustion air supply port 51 is connected to the ventilation hole 61.
A secondary air passage 62 is provided between the combustion cylinder 11 and the outer cylinder 15 for supplying secondary air to the front of the burner head 21 through the combustion chamber 1. A conical guide plate 63 is welded to the tip of the secondary air passage 62, and the guide plate 63 directs the secondary air to the combustion chamber 64 formed in the center of the combustion tube 11. are collected.

Next, to explain the function of the pressure regulating plate 52, pressurized combustion air is sent to the combustion air supply port 51 from a blower or the like, so when lowering the combustion amount, this pressure regulating plate 52 Otherwise, the passage resistance of the secondary air (straightening plate 14 and the elongated secondary air passage 62) will be greater than that of the primary air, so even if the amount of air blown from a blower etc. is lowered to match the combustion amount, there will be too much primary air. Although flame lift, flame extinguishing, and ignition failure may occur, the pressure regulating plate 52 prevents the ventilation hole 5 from occurring.
If the supply pressure of the primary air is lowered in advance by making the passage resistance of the primary air passing through the nozzle 3 larger than the passage resistance of the secondary air passing through the rectifying plate 14, it is possible to prevent an excess of primary air. An air suction effect occurs due to the negative pressure generated around the vaporized gas ejected from the combustion chamber, and the ratio of strong/weak combustion amount can be increased.

Note that if there is no pressure regulating plate 52, the smaller the burner, the greater the passage resistance of the secondary air passing through the rectifying plate 14 than the primary air. , the range in which oil is combusted (heat value adjustment range) becomes smaller. Stoves require a large amount of combustion when the room is cold and a small amount when the room is warm.
If the pressure regulating plate 52 is not provided, the miniaturization of the burner does not meet the needs of the product. vice versa,
By providing the pressure regulating plate 52, the burner can be made smaller and the combustion range can be expanded.

Next, the operation of this embodiment will be explained.

Liquid fuel (kerosene) enters the inner cylinder 17 from the nozzle 44
When the vaporized gas of The primary air is sucked into the primary air supply port 41 through the primary air supply gaps 54 and 42, and
Vaporized gas and primary air are ejected from the inner cylinder 17 and sucked into the recess 37 of the diffuser 36.
The vaporized gas and primary air are stirred into a violent turbulent flow on the inner surface of the recess 37 and then moved into the mixing chamber 34.
further diffused into the differential user 36 and the outer cylinder 1.
It is compressed in the process of passing through the small cross-sectional area space between the resistor plate 32 and the burner head 21, and is expanded along the conical surface 40 of the diffuser 36, while being diffused into the large cross-sectional area space between the resistance plate 32 and the burner head 21. . In this way, the vaporized gas and air ejected from the inner cylinder 17 are subjected to a strong stirring action inside the mixing chamber 34, and mixing is promoted by the change in flow velocity due to the change in cross-sectional area, and the mixed gas is transferred to the burner head 2.
The mixed gas is ejected from one flame port 24 into the combustion chamber 64, and the mixed gas is ignited by a spark from an ignition plug (not shown) or the like.

On the other hand, a secondary air passage 62 formed from the combustion air supply port 51 by the ventilation hole 61 of the rectifier plate 14, etc.
The rectified secondary air is supplied to the combustion chamber 64, and sufficient oxygen is supplied to the flame formed in the flame port 24, so that blue flame is fixed in the flame port 24.

The heat of the flame fixed in the burner port 24 heats the annular protrusion 25 at the tip of the outer cylinder that protrudes from the burner port 24, and the temperature of the frame plate 22 and the burner port plate 23 of the burner head 21 rises. The burner head 21 prevents condensation of vaporized petroleum gas and prevents yellow flame from occurring. In particular, when the burner head 21 is ignited (when the temperature rises), the burner head 21 is quickly warmed up to reduce condensation that tends to occur in that area, and even if oil condensation occurs on the burner head 21, the temperature of the burner head 21 rises rapidly. Condensation disappears in a short time, reducing the unstable time of ignition flame.

[Effect of idea]

According to the present invention, a resistance plate is provided in the outer cylinder inside the burner head, and a concave diff user is provided in the center of this resistance plate, which faces the jet nozzle at the tip of the inner cylinder. The ejected vaporized gas and primary air are mixed inside the diffuser and then diffused, and then compressed between the diffuser and the outer cylinder and then diffused, so that they are completely mixed and sent to the flame port of the burner head. Good blue flame combustion is obtained in which both the primary flame and the secondary flame are blue flames.

[Brief explanation of the drawing]

The figure is a sectional view showing an embodiment of the vaporizing burner of the present invention. 11... Combustion tube, 15... Outer tube, 17... Inner tube, 21... Burner head, 24... Burner port, 32
... resistance plate, 34 ... mixing chamber, 36 ... diffuser, 41 ... primary air supply port, 44 ... nozzle, 62 ... secondary air passage, 64 ... combustion chamber.

Claims (1)

[Scope of utility model registration request] An outer cylinder and an inner cylinder are fitted concentrically inside a cylindrical combustion cylinder, and the space between the outer cylinder and the inner cylinder is shielded, and the tip of the inner cylinder is formed shorter than the tip of the outer cylinder. A mixing chamber is formed in the outer cylinder, a burner head having a flame port is provided at the tip opening of the outer cylinder, a combustion chamber is provided in front of the burner head, and a combustion chamber for ejecting vaporized gas is provided at the base end side of the inner cylinder. A nozzle is provided, a primary air supply port is opened in the inner cylinder to the nozzle, and a secondary air passage is provided between the combustion cylinder and the outer cylinder for supplying secondary air to the combustion chamber, A vaporizing burner characterized in that a resistance plate is provided in the outer cylinder inside the burner head, and a concave diffuser is disposed in the center of the resistance plate, facing the jet nozzle at the tip of the inner cylinder.