JPH0232982Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a vaporizer for an oil combustor that generates a jet of vaporized fuel.

[Conventional technology]

Conventionally, in vaporizing oil combustors, a vaporizer using an electric heater as a heat source has generally been used to generate vaporized fuel. This type of vaporizer usually
It consists of a cylindrical metal outer tube with a bottom and a metal inner tube that is also bottomed and cylindrical and is arranged concentrically with a predetermined gap on the inner surface of the metal outer tube. The opening edges of the metal outer tube and the metal inner tube are joined together to form a cylindrical hollow space formed by the inner surface of the metal outer tube and the outer surface of the metal inner tube, which serves as a vaporization chamber. Then, an electric heater is installed inside the metal inner tube, and the temperature inside the vaporization chamber is increased by the electric heat of this electric heater, and when this temperature reaches a temperature suitable for producing vaporized fuel oil, The fuel in the vaporization chamber is pressure-fed and vaporized, and is jetted as vaporized fuel into a vaporization pipe communicating with the vaporization chamber.

In addition, such a vaporizer is equipped with a temperature detection element such as a thermistor, and this temperature detection element is used to appropriately control the energization state of the electric heater.
The temperature in the vaporizing chamber is always maintained at a temperature suitable for producing vaporized fuel, and the jet stream for producing vaporized fuel is continued.

[Problem that the invention attempts to solve]

However, the temperature inside the vaporization chamber of such a vaporizer cannot be determined even if the energization state of the electric heater is appropriately controlled using a temperature detection device such as a thermistor.
The temperature is not uniformly suitable for producing vaporized fuel over the entire area. That is, when examining the temperature distribution inside the vaporization chamber, the temperature inside the cylindrical vaporization chamber is highest at approximately the center of the body, and decreases toward the ends of the body.

Further, in such a vaporizer, the communication point between the vaporization chamber and the vaporization tube is located near the end of the vaporization chamber body due to its structure. If the temperature at the end of the vaporization chamber body is lower than the temperature suitable for producing vaporized fuel, some end-vaporized fuel will be mixed into the vaporized fuel jetting out from the vaporization chamber, resulting in incomplete combustion when ignited. This problem occurs. That is, in order to prevent unvaporized fuel from being mixed, it is necessary to constantly control the temperature at the end of the vaporizing chamber body to a temperature suitable for producing vaporized fuel.

However, when controlled in this manner, as is clear from the temperature distribution in the vaporization chamber, the temperature at the approximate center of the body of the vaporization chamber becomes higher than the temperature suitable for producing vaporized fuel, and the fuel is not operated in this condition for a long time. If used for a long period of time, carbon, tar, etc. would precipitate in this area, causing problems such as clogging of the vaporization chamber.

[Means for solving problems]

The present invention has been developed to solve these problems, and includes a bottomed cylindrical inner tube in which an electric heater is disposed, and a second inner tube on the upper and lower sides of the first inner circumferential wall surface. The first and second notched recesses are fitted into the inner tube at substantially the center of the body facing the upper and lower sides of the body on which the inner tube is disposed. a jet ring which is fixed and has a second inner peripheral wall surface formed with a predetermined step on both sides of the first inner peripheral wall surface, and which is integrally provided on the outer peripheral wall surface of the vaporizing tube; A bottomed cylindrical outer tube which is divided into one side and the other side of the second inner circumferential wall surface of the ring and is fitted and fixed, and the inner surface thereof and the outer surface of the inner tube form a vaporizing chamber, and the installation method of this outer tube. A vaporizer for an oil combustor is constructed by providing first and second oil feed pipes provided at the left end and right end of the lower side of the body and forming a pressure passage for fuel to the vaporization chamber, and in this vaporizer for an oil combustor, A passage communicating with the inside of the vaporizing pipe is provided in the first notched recess of the jet ring, and this passage is used as a jet passage for vaporized fuel generated in the vaporizing chamber.

[Effect]

Therefore, according to this invention, the passage provided in the first notch of the jet ring, that is, the passage communicating with the approximate center of the body of the vaporization chamber, is used as the jet passage, and the vaporized fuel generated in the vaporization chamber is vaporized. The water will be jetted into the pipe.

〔Example〕

Hereinafter, the vaporizer for an oil combustor according to the present invention will be explained in detail. FIG. 1 is a front sectional view showing one embodiment of this carburetor, and FIG. 2 is a partially cutaway external perspective view of this carburetor. In the figures, reference numeral 1 denotes a ring-shaped jet ring whose side view is shown in FIG. It is divided into an inner circumferential wall surface 1a and a narrow second inner circumferential wall surface 1b formed with a predetermined step on both sides of the first inner circumferential wall surface 1a,
The inner diameter of the second inner circumferential wall surface 1b is larger than the inner diameter of the first inner circumferential wall surface 1a. Also,
A semicircular notch (first notch) 1c and a rectangular notch (second notch) are provided on the upper and lower sides of the first inner peripheral wall surface 1a in FIG. 1d is formed, and a semicircular notch 1
A jet hole 1e is provided at approximately the center of the right side of c, passing through in the lateral direction and serving as a jet passage for vaporized fuel.
Furthermore, a thermistor mounting hole 1f for mounting a thermistor (not shown) as a temperature detecting element is bored in the outer peripheral wall surface of the ring near the cutout recess 1c.

The jet ring 1 having such a shape is integrally provided on the outer peripheral wall surface of the vaporizing pipe 2, as shown in FIG.
It communicates with the inside of the vaporizing tube 2 via the jet hole 1e. A jet body 3 having a jet port 3a is screwed to the tip of the vaporizer tube 2, and the vaporized fuel jetted from the jet hole 1e is transferred to a needle at the tip of a valve rod (not shown) provided inside the vaporizer tube 2. The water is spouted from the spout 3a as appropriate by the operation of the valve.

Furthermore, the jet ring 1 integrally equipped with the vaporizing pipe 2 formed in this way is
The notched recess 1c is fitted into a bottomed cylindrical metal inner tube 4 having an outer diameter approximately equal to the inner diameter of the inner circumferential wall surface 1a.
and 1d are fixed so as to face the upper and lower sides of the body on which the metal inner tube 4 is installed and to be positioned approximately at the center of the body. Then, on one side of the narrow second inner circumferential wall surface 1b formed with a predetermined step on both sides of the inner circumferential wall surface 1a of the jet ring 1, an outer diameter approximately equal to the inner diameter of the inner circumferential wall surface 1a is provided. The opening edge of the first metal outer tube 5 _-1 , which has a bottomed cylindrical shape, is fitted until it comes into contact with the stepped wall surface formed by the first inner circumferential wall surface 1a, and the other side of the second inner circumferential wall surface 1b. Similarly, a cylindrical second metal outer tube 5 _-2 having an outer diameter approximately equal to the inner diameter of the inner circumferential wall surface 1 b is inserted until one opening edge thereof comes into contact with the stepped wall surface formed by the inner circumferential wall surface 1 a. ing. The fitting portions of the jet ring and the metal outer tubes 5 _-1 and 5 _-2 are securely joined to prevent vaporized fuel from leaking. Further, the other opening edge of the metal outer tube _5-2 is also securely joined to the opening edge of the metal inner tube 4 to prevent vaporized fuel from leaking. That is, a bottomed cylindrical metal outer tube 5 is fitted and fixed into one side and the other side of the second inner circumferential wall surface 1b of the jet ring 1, and the inner surface of the metal outer tube 5 and the metal inner tube 4 are connected to each other. The cylindrical hollow part 7 formed by this serves as the vaporization chamber of this vaporizer. This vaporization chamber 7 is provided at the lower left and right ends of the metal outer tube 5 (FIG. 1), that is, at the lower left and right ends of the body on which the metal outer tube 5 is installed, and is combined into one oil feed pipe 8 _{- 1} and 8 _-2 , fuel is forced into the vaporization chamber 7.

In addition, 9 is a cylindrical electric heater arranged inside the metal inner tube 4, and 10 is a vaporizing medium provided in the vaporizing chamber 7. The energization state of the electric heater 9 is controlled by a thermistor attached to the jet ring 1.

Next, the operation of the thus configured vaporizer for an oil combustor will be explained. That is, when the electric heater 9 is energized and energized, the temperature inside the vaporization chamber 7 increases. Then, when the temperature in the vaporization chamber 7 reaches a temperature suitable for producing vaporized fuel, the oil pump is activated, and the fuel is pressure-fed to the vaporization chamber 7 via the oil transfer pipes 8 _-1 and 8 _-2 . Ru. Then, vaporized fuel is generated in the vaporization chamber 7 and is jetted into the vaporization pipe 2 through the jet hole 1e of the jet ring 1. At this time, if the needle valve at the tip of the valve rod provided inside the vaporizing pipe 2 is opened to the jet port 3a of the jet fluid 3, the vaporized fuel jetted into the vaporizing pipe 2 will be jetted out from the jet port 3a. do. Thereafter, the oil pump continues to pump fuel, and the thermistor attached to the jet ring 1 is used to control the energization state of the electric heater 9 to maintain the temperature in the vaporization chamber 7 suitable for producing vaporized fuel. If the temperature is maintained, vaporized fuel always flows into the vaporizing pipe 2 using the jet hole 1e of the jet ring 1 as a jet passage, and is ejected from the jet port 3a.

By the way, in such a vaporizer as well, in order to prevent unvaporized fuel from being mixed, it is necessary to maintain the temperature of the vaporizing chamber near the jet hole through which vaporized fuel is jetted at a temperature suitable for producing vaporized fuel. That is, it is necessary to maintain the temperature of the vaporization chamber near the notch 1c of the jet ring 1 provided approximately at the center of the body of the vaporization chamber 7 at a temperature suitable for producing vaporized fuel. In other words, the temperature at the approximate center of the body of the vaporizing chamber 7, where the temperature is highest when producing vaporized fuel, can be maintained at a temperature suitable for producing vaporized fuel, and the temperature distribution inside the vaporizing chamber 7 is The maximum temperature is the temperature suitable for the formation of , and decreases toward the end of the body. Therefore, the temperature of each part in the vaporization chamber 7 does not exceed the temperature suitable for producing vaporized fuel, and even after long-term use, carbon, tar, etc. will precipitate and the vaporization chamber will become clogged. There are no problems such as storage.

Further, the time period for producing vaporized fuel from when the electric heater 9 is energized until the vaporized fuel is generated and jetted is significantly shorter than that of conventional vaporizers.
In other words, in the past, the body end of the vaporization chamber was used as the jet port, so the oil pump could not be operated until the approximate lowest temperature in the internal temperature distribution of the vaporization chamber reached a temperature suitable for producing vaporized fuel. Ta. However, according to the vaporizer according to this embodiment, the temperature of the vaporizing chamber near the notch 1c of the jet ring 1 is the highest temperature in the internal temperature distribution of the vaporizing chamber 7, and vaporization occurs as soon as possible after the electric heater 9 is energized. A temperature suitable for fuel production is reached. At this time, if the oil pump is activated to forcefully feed the fuel to the vaporization chamber 7 via the oil feed pipes 8 _-1 and 8 _-2 , vaporized fuel is immediately generated and a jet stream flows from the jet hole 1e of the jet ring 1. do. Therefore, the time for producing vaporized fuel is significantly shortened compared to the conventional method.

The rectangular notch 1d of the jet ring 1 is an escape point for the fuel that permeates into the joint between the outer surface of the metal inner tube 4 and the inner wall surface 1a of the jet ring 1. That is, since this carburetor is installed with the ejection port 3a of the ejection body 3 on the upper side as shown in FIG. A portion of it remains. If the notched recess 1d of the jet ring 1 were not formed, the stagnant fuel would penetrate into the joint between the outer surface of the metal inner tube 4 and the inner circumferential wall surface 1a of the jet ring 1, and this portion This causes problems such as carbon and tar depositing on the surface. However, the formation of the cutout recess 1d allows the stagnant fuel to flow appropriately, so the above-mentioned problem does not occur. There is also an advantage that the temperature of the vaporizing tube 2 can be slightly lowered by forming the notched recess 1d.

[Effect of idea]

As is clear from the above explanation, according to the oil combustor vaporizer according to the present invention, the first
The passage provided in the notch, that is, the passage communicating with the approximate center of the body of the vaporization chamber, is used as the jet passage, and the vaporized fuel produced in the vaporization chamber is jetted into the inside of the vaporization pipe. By maintaining the temperature of the vaporization chamber near the notch at a temperature suitable for producing vaporized fuel, mixing of unvaporized fuel is prevented, and the vaporization chamber is prevented from mixing with carbon, tar, etc. due to long-term use. clogging can be prevented.

In addition, since the temperature of the vaporization chamber near the first notch, that is, the temperature at the approximate center of the body of the vaporization chamber, reaches a temperature suitable for producing vaporized fuel earlier than other parts, it is necessary to apply electricity to the electric heater before energizing. The time required to generate and jet vaporized fuel can be shortened compared to the conventional method. That is, the ignition time for vaporized fuel can be shortened.

Further, according to the vaporizer for an oil combustor according to the present invention, the second notch formed in the jet ring allows the fuel remaining in the vaporizing chamber to flow appropriately, so that the outer surface of the inner tube and the first This serves as an escape for the fuel that permeates the joint with the inner circumferential wall surface, making it possible to prevent carbon, tar, etc. from depositing in this part. Further, by forming the second notch, it can be expected that the temperature of the vaporizing tube can be lowered, albeit slightly.

[Brief explanation of drawings]

Fig. 1 is a front sectional view showing an embodiment of the vaporizer for oil burners according to the present invention, Fig. 2 is a partially cutaway external perspective view of this vaporizer, and Fig. 3 is a jet ring used in this vaporizer. A side view, FIG. 4 is a cross-sectional view taken along the line -- in FIG. 3, and FIG. 5 is a side cross-sectional view of a vaporizing tube formed by integrally molding this jet ring. 1... Jet ring, 1a... First inner peripheral wall surface, 1b
...Second inner circumferential wall surface, 1c... Notch recess (first notch recess) 1d... Notch recess (second notch recess),
1e... Jet hole (jet flow passage), 2... Vaporizing pipe, 4
...metal inner tube, 5...metal outer tube, 5 _-1 ...first metal outer tube, 5 _-2 ...second metal outer tube, 7...vaporization chamber, 8 _-1 , 8 _-2 ...Oil pipe, 9...Electric heater.

Claims (1)

[Claims for Utility Model Registration] A bottomed cylindrical inner tube with an electric heater disposed inside the inner tube, and first and second notched recesses on the upper and lower sides of the first inner circumferential wall surface. The first and second notched recesses are fitted and fixed at approximately the center of the body facing the upper and lower sides of the body on which the inner tube is arranged, and the first inner circumference A jet ring having a second inner peripheral wall surface formed with a predetermined step on both sides of the wall surface and integrally provided on the outer peripheral wall surface of the vaporizing tube; A cylindrical outer tube with a bottom, which is divided into one side and the other side and fitted and fixed, and whose inner surface and the outer surface of the inner tube form a vaporization chamber; A vaporizer for an oil combustor, comprising first and second oil feed pipes forming a passage for pressurizing fuel to the vaporization chamber, the first notch recess communicating with the inside of the vaporization pipe. A vaporizer for an oil combustor, characterized in that the passage is a jet passage for vaporized fuel generated in the vaporization chamber.