JP2002031341A - Discharge-type ignitor of oil burning appliance - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a discharge-type ignitor of an oil burning appliance which ensures prevention of odor caused by exudation of fuel from a discharging electrode. SOLUTION: A vertically movable wick is disposed in a wick guide cylinder, consisting of a wick guide inner cylinder and a wick guide outer cylinder. A heat chamber is located on a fire pan, which is disposed at the upper end of the wick guide cylinder, and a window is provided to the wick guide outer cylinder below the fire pan. A discharging electrode is arranged from outside the window, being supported by a metal fixture. The fire pan is formed with a notch which extends to the window A protrusion is provided to either at the bottom of an insulator of the discharging electrode or at the upper surface of the metal fixture, while an opening is formed in the metal fixture in the vicinity of the protrusion. Thus, since an airflow is formed from outside toward the discharging electrode to surely prevent the odor generation, which is caused by the exudation of fuel.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a discharge ignition device called electronic ignition used for an oil stove.

[0002]

2. Description of the Related Art Conventionally, in this type, FIG.
As shown in the figure, a window c is formed below the grill pan b of the core guide outer cylinder a, and the discharge electrode d is installed in this window c as desired from the outside, and a counter electrode provided in the recess f at the upper end of the fuel core e. The ignition was performed by performing discharge between the plate g.

[0003]

However, in this conventional apparatus, the window c is closed by the baking pan b and the discharge electrode d.
Evaporated fuel from the fuel core e comes into contact with the discharge electrode d and the tip of the insulator portion h and liquefies, or the evaporative fuel filled in the window c liquefies due to a decrease in temperature due to fire extinguishing. It oozed out and caused odor.

[0004]

In order to solve the above-mentioned drawbacks, the present invention focuses on this point, and in particular, the structure of the present invention is such that it can be moved up and down within a core guide cylinder composed of a core guide inner cylinder and a core guide outer cylinder. Equipped with a fuel core, a combustion tube is placed on the fire tray at the upper end of the core guide tube, and a window is provided below the fire plate of the core guide outer tube. The window is supported by the support bracket from outside. In the one where the discharge electrode is located, a cutout portion is formed in the fire tray portion so as to be continuous with the window portion, and a protrusion is formed on either the bottom portion of the insulator portion of the discharge electrode or the upper surface of the support bracket. In addition, an opening is formed in the support fitting near the projection to form a flow of air from the outside toward the discharge electrode.

[0005]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a discharge ignition device for an oil-fired appliance according to the present invention. Reference numeral 1 denotes a core guide cylinder composed of a core guide inner cylinder 2 and a core guide outer cylinder 3, which is provided with a fuel core 4 which can be moved up and down inside. An inner cylinder 6 and a middle cylinder 7 of a double-cylinder combustion cylinder 9 comprising an outer cylinder 8 are mounted.

Reference numeral 10 denotes a recess formed at the upper end of the fuel core 4, which is formed so as to be at a position lower than the fire pan 5 even at the highest position, which is the ignition position of the fuel core 4. The tip of the counter electrode plate 12 having one end fixed to the band 11 is located from the core guide outer cylinder 3 side.

The counter electrode plate 12 is formed in an R shape along the outer periphery of the fuel core 4, and has a hook piece 13 and a bent piece 14 for fixing to the core fixing band 11 at a lower portion, and an upper portion. Is formed with a counter electrode portion 15 bent from the outer peripheral direction of the fuel core 4 toward the inside of the concave portion 10.

[0008] Reference numeral 16 denotes a highest position which is an ignition position of the fuel core 4, and a window portion comprising an opening formed in the core guide outer cylinder 3 opposed to the concave portion 10, and an insulator portion 17 is formed through the window portion 16. The discharge electrode 19 fixed by the fixing bracket 18 is located to face the concave portion 10, and the discharge electrode 19 is
Approaching on the fuel core 4.

Reference numeral 20 denotes a flange portion provided on the outer periphery of the fire tray 5 of the core guide outer cylinder 3, and forms a gap for air circulation between the lower end of the outer cylinder 8 of the combustion cylinder 9.

Reference numeral 21 denotes a support fitting for supporting the insulator 17 and positioning the discharge electrode 19 in the window 16 and having a through hole 22 for penetrating a narrow rear side of the insulator 17, and contact pieces on both sides of the through hole 22. By contacting the step portion 24 of the insulator portion 17 with 23 and attaching the mounting piece 25 to the fixing bracket 18, the discharge electrode 19 is supported at a predetermined position by being pressed against the core guide outer cylinder 3 side.

Further, two small projections 26 are provided at the front end of the upper surface of the support fitting 21 on which the insulator portion 17 is mounted.
7 is formed, and the protrusion 26
An opening 27 is formed on the rear side, and the opening 27 communicates with an interval 28 between the fixing bracket 18 and the core guide outer cylinder 3,
The outside air flows through the discharge electrode 19 through the gap 28, the opening 27, and the gap between the bottom of the insulator 17, while the fire tray 5 above the discharge electrode 19 has a window. A cutout portion 29 communicating with the portion 16 is formed, and the inflowing air is supplied to a combustion portion at the upper end of the fuel core 4 to be burned.

Although the gap is formed by providing the protrusion 26 on the support fitting 21 side, a gap may be formed by providing a protrusion at the bottom of the insulator 17.

Next, the operation of the embodiment of the present invention will be described. If the fuel core 4 is now raised and raised to the highest position, which is the ignition position, the concave portion 10 will be located together with the counter electrode plate 12 in the window portion 16 from which the discharge electrode 19 projects.

If an ignition switch (not shown) is pressed to energize the discharge electrode 19 for a certain period of time, discharge is performed from the discharge electrode 19 toward the counter electrode portion 15 of the counter electrode plate 12, and This discharge ignites the fuel core 4 at the upper end of the concave portion 10, which circulates around the entire periphery of the upper end of the fuel core 4, and ignites. Can be adjusted.

Therefore, since the ignition portion is located inside the core guide cylinder 1 below the fire tray 5, there is no risk of erroneous discharge to the combustion cylinder 9 to cause ignition failure, and the discharge electrode is always in a strong combustion flame. 19 and the return electrode plate 12 are not exposed, and even if used for a long period of time, they do not burn out or cause poor discharge, and a reliable and good ignition can always be obtained.

Further, at the time of combustion, the interval 28 and the opening 27
Outside air flows to the discharge electrode 19 of the window 16 through the gap between the bottom of the insulator 17 and the protrusion 26, and the evaporative fuel of the fuel core 4 generated here is cut off by the notch 29 of the fire tray 5. The vaporized fuel is supplied to the combustion portion via the fuel cell and burned. The vaporized fuel does not adhere to the discharge electrode 19 or the tip of the insulator portion 17 and is not liquefied. Does not fill the window portion 16, so that it does not seep outward and cause odor, and good combustion can always be obtained.

[0017]

As described above, according to the present invention, ignition failure due to erroneous discharge to the combustion cylinder and burnout and discharge failure are caused without exposing the discharge electrode and the counter electrode plate to a strong combustion flame. It ensures reliable and good discharge ignition over a long period of time, and furthermore, the discharge electrode in the window always has a flow of air from the outside to prevent the generation of odor due to the seepage of fuel vapor. It can be reliably prevented, and good combustion without odor can be obtained.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a main part of an oil combustion apparatus to which an embodiment of the present invention is applied.

FIG. 2 is a horizontal sectional view of the main part.

FIG. 3 is a front view of the main part.

FIG. 4 is a perspective view of the fuel core.

FIG. 5 is a front view of the counter electrode plate.

FIG. 6 is a perspective view of the discharge electrode and a support.

FIG. 7 is a sectional view of a main part showing a conventional example.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 core guide cylinder 2 core guide inner cylinder 3 core guide outer cylinder 4 fuel core 5 fire tray 9 combustion cylinder 10 recess 12 counter electrode plate 16 window 19 discharge electrode 21 support fitting 26 protrusion 27 opening 28 interval 29 cutout

Claims (1)

[Claims] 1. A core guide cylinder comprising a core guide inner cylinder and a core guide outer cylinder, a vertically movable fuel core is provided, and a combustion cylinder is mounted on a fire tray at the upper end of the core guide cylinder. A window is provided below the grate portion of the guide outer cylinder, and the discharge electrode is located on the window portion and is supported by the support bracket from the outside. In the grate portion, a notch portion continuous with the window portion is provided. And a projection is provided on one of the bottom of the insulator portion of the discharge electrode and the upper surface of the support metal, and an opening is formed in the support metal near the protrusion, and the opening is formed toward the discharge electrode from outside. A discharge ignition device for an oil burning appliance characterized by forming a flow of air.