JP2000046331A - Discharge-type igniter of kerosene burner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it perform the discharge ignition stably by bringing the tip of a discharge electrode into contact with top end of a wick and letting a discharge spark fly to it, through the dispersion of the dimensional accuracy of a wick lifter or a wick or the transformation during use of the wick causes a fluctuation in the height of the top end of the wick in each ignition position, even if there is a fluctuation. SOLUTION: The tip 5a of a discharge electrode gets in the combustion part 1b of a core, in contact with the top 1a of the wick, so that a spark may fly, and it sinks a little under the top of the wick, and the top end of the hem 6a of a receiving electrode projects above the top end of the wick, and the bottom of the hem of the receiving electrode is positioned under the top end of the core, and it inclines in the lifting direction of the core, and a discharge electrode bend is made aslant in opposite direction to it. Hereby, even if the wick rises, the tip of the discharge electrode is not buried in the combustion part of the wick, and the spark flies toward the upper place right near the superposition place with the wick of the hem 6a of the receiving electrode from the tip 5a of the discharge electrode, and even if there is a change in the height of the top end 1a of the wick in the ignition position, it can be ignited stably and safely through the nap of the wick having intervened between both electrodes.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention generates a high voltage discharge,
The present invention relates to a discharge ignition device for an oil combustor in which a core is ignited with the energy.

[0002]

2. Description of the Related Art As an ignition device for an oil combustor, a system is generally used in which electric power from a dry battery is supplied to an ignition heater having a coiled filament of a thin nichrome alloy wire to cause the heater to glow red and ignite the core.

[0003] A device for providing an ignition discharge electrode and a counter electrode with a core interposed therebetween and igniting the core using discharge is known (Japanese Utility Model Publication No. 63-35244). It is molded integrally with the core holder fixed to the inner surface of the core by the cut-and-raised claw, and there is a core between the core and the discharge electrode. However, if the tar adheres to the upper end of the core between the discharge electrodes, the absorption of oil by the capillary action at that location is cut off, and there is a disadvantage that ignition does not occur even if discharge is performed. It requires the work of fixing the counter electrode for each core, and has the disadvantage of increasing the manufacturing cost.
In addition, the upper end of the core is worn out or sagged by long-term use, and the counter electrode protrudes upward from the upper end of the core,
Discharge sparks occur in the space above the upper end of the wick and do not touch the upper end of the wick.

[0004] An igniter is known in which an opposing electrode is provided which is shifted laterally by a predetermined distance from a position of a core facing a discharge electrode and is provided in contact with the core (JP-A-6-159679). The counter electrode is formed of a wire having a small heat capacity of about 0.5 mm, and the opposite electrode is heated to a high temperature by electric discharge. This high temperature is transmitted to the outer surface of the contacting core, and the core is heated and ignited. Since the electrode is a thin wire, the counter electrode is broken or deformed during use, causing no discharge and no ignition.Also, even if the counter electrode is heated at a high temperature, the heat capacity of the core is large. There is a disadvantage that the ignition temperature is hardly reached.

[0005] The discharge electrode and the counter electrode are both bent upward, and the pointed ends of both electrodes protrude upward from the upper end of the core, and the respective bent portions become wider as going upward. An igniter that is provided and ignites by discharging between both electrodes is known (Japanese Patent Laid-Open No. Hei 6-213337). In this device, both electrodes are formed of a wire, and each upper end is located above the upper end of the core. The discharge spark does not fly to the part buried in the core because either electrode is buried in the core, and the sparks are generated along the upper end of the core where both electrodes are exposed. As time elapses, tar adheres to the upper end of the wick, the rising position of the wick fluctuates, and the upper end of the wick becomes sluggish, so that there is a disadvantage that ignition does not occur.

[0006] While the wick is rising, the discharge electrode is energized, and spark discharge is continuously repeated between the opposing electrodes. During the discharge, the upper end of the rising wick reaches a position where it comes into contact with the discharge spark and is ignited. Although an ignition device is known (Japanese Patent Application Laid-Open No. 6-241449), the ignition condition is such that the ignition is possible only when passing through the optimal ignition position during the ascent of the core. It has the disadvantage of short transit times and no ignition. In addition, when the operation speed is reduced, there is a disadvantage that the energization time becomes longer, the battery is quickly consumed, and ignition does not occur.

[0007] The discharge electrode and the negative electrode are horizontally opposed to each other, the tip of the discharge electrode is pressed toward the inside of the core, and the discharge spark is laterally separated from the side of the core at a position where the negative electrode is separated from the side of the core. 2. Description of the Related Art An ignition device that ignites by flying in a direction and an ignition device in which both electrodes are integrally formed and which ignites by pressing the tip of a discharge electrode toward the inside of a core while discharging are known (Japanese Patent Application Laid-Open No. 8-75164). However, in this device, the discharge spark is blown laterally away from the side of the core,
Variations in the accuracy of the shape of the core, deformation during use, and deformation of the shape due to the adhesion of tar cause the spark to abut on the side of the core or move too far away, making ignition unstable and causing the core to The fluff penetrates into a large amount to hinder discharge, and the generation of sparks becomes unstable and the ignition is not stable.In addition, the electrode is pressed toward the inside of the core while repeating the discharge continuously. Dry batteries drain quickly,
There is a disadvantage that the discharge spark is not generated in a short time.

[0008]

SUMMARY OF THE INVENTION The present invention relates to a discharge type ignition device using the above-mentioned prior art dry battery as a power source. That is, in the case of using a power source having a small electric capacity such as a dry battery as a power source for generating a discharge spark, the heat energy of the discharge spark is also small, and in order to directly ignite the upper end of the core with the discharge spark, a discharge electrode, Unless the delicate relationship between the discharge spark and the core, the shape and the relationship of the positive and negative discharge electrodes, etc. are ensured with high accuracy, even if the discharge occurs, only white smoke may be emitted and the ignition may not occur.

[0009] In a petroleum combustor using a wick, the height and thickness of the wick change with the lapse of combustion time, the distance between the discharge electrode and the wick cannot be maintained, and further, the impurities of the fuel are converted into tar to form an upper end of the wick. It was difficult to obtain stable ignition performance for a long period of time due to bad conditions such as adhesion to the part.

[0010] For this reason, commercialization has been made of a structure in which the wick is ignited when the wick passes the optimal point of ignition during the ascent operation of the wick. However, they are used to stabilize the position of the discharge spark. When the negative electrode is an electrode rod, the tip of the tip is the discharge end and the receiving end respectively, so the optimal ignition range is narrow, and if the operation is extremely fast due to individual differences in the ignition operation of the combustor user Means that the time for the wick to pass through the optimal point of ignition with the discharge spark is also shorter,
It leads to a misfire. An object of the present invention is to provide a discharge-type ignition device which can improve the above-mentioned drawbacks of the conventional device without limiting the operating conditions, and can surely obtain stable ignition performance for a long period of time.

[0011]

In order to solve the above-mentioned problems, the present invention raises the gap between the core inner cylinder 3 and the core outer cylinder 4 provided with a vent hole on the upper peripheral surface to raise the gap between the core inner cylinder 3 and the core inner cylinder 3. The discharge electrode 5 is provided to the combustion portion 1b of the wick 1 at the ignition position where the upper end 1a of the wick projects upward from both upper ends of the wick outer cylinder 4, and the receiving electrode 6 facing the electrode. A discharge igniter for an oil-fired combustor which ignites the wick 1 by a discharge spark between the two electrodes; The other receiving electrode 6 having a receiving electrode edge 6a linearly formed in a direction opposite to the inclination of the tip of the discharging electrode with respect to the elevating direction of the core 1 opposite thereto; The point 5a is located slightly below the upper end 1a of the core 1 so that the discharge spark contacts the upper end 1a of the core 1 at the ignition position. And a position projecting inward from the outer surface of the core, the upper end 6b of the receiving electrode edge 6a is, core 1
And the distance from the discharge electrode tip 5a to the discharge electrode tip 5a is shorter than the distance from the inner surface of the core outer cylinder 4 to the discharge electrode tip 5a, and the receiving electrode edge lower end 6c is larger than the core upper end 1a. An ignition device having a structure below and at a position where the interval from the discharge electrode tip 5a is closer than the interval from the receiving electrode edge upper end 6b to the discharge electrode tip 5a and on the same side as the discharge electrode tip 5a with respect to the core. Discharge spark 16 stably and reliably
It is generated in contact with a and ignited.

[0012]

When the operation lever 17 is operated, the core vertical shaft 10 rotates, one end of the core upper and lower metal fittings 11 rotates upward, and the core 1 rises in the gap between the core inner cylinder 3 and the core outer cylinder 4. The obliquely bent portion 5e having the discharge end inclination angle 5b of the discharge electrode 5 pushes the combustion portion 1b on the upper part of the core 1 in the direction of the core inner cylinder 3 and at the same time the combustion portion
A part of the fluff 1c of FIG. 1b is pushed and separated by the discharge electrode bending part 5e, and the core 1 stops at the highest position.
The discharge spark 16 contacts the upper end 1a of the core 1 at a position where the discharge electrode tip 5a slightly sinks with respect to the discharge electrode bent portion 5e.
A part of the fluff 1c of the burning portion 1b of the core 1 pressed in the step 1 enters a state of intervening between the discharge electrode tip 5a and the receiving electrode edge 6a. The receiving electrode edge 6a of the receiving electrode 6 faces the discharge electrode tip 5a, and has an inclination of the receiving electrode edge inclination angle 6b with respect to the elevating direction of the core 1, and the upper end of the receiving electrode edge 6a is higher than the upper end 1a of the core 1. And the lower end of the receiving electrode edge 6a is formed below the upper end 1a of the core 1. When the ignition switch 13 is turned on, the receiving electrode edge 6a moves from the discharge electrode tip 5a.
A discharge spark 16 is generated between the portion closest to the upper end 1a of the wick 1 and the spark ignites the fluff of the upper end 1a of the wick 1 and spreads to the upper end 1a of the wick 1.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Oil is stored in an oil tank 22 and the lower end 1b of the core 1 is immersed in the stored oil, and
The core vertical shaft 10 is rotated by the rotation of
The core 1 rises and descends in the gap between the core inner cylinder 3 and the core outer cylinder 4, and a fluffy combustion part 1 b is provided on the upper part of the core 1.
Is formed, and the oil rises inside the core 1 by the capillary action to reach the combustion part 1b of the core 1, and the discharge electrode support plate 5d is fixed to the outer peripheral surface of the core outer cylinder 4, The discharge electrode 5 is placed and fixed on the discharge electrode support plate 5d, and the distal end of the discharge electrode is bent upward, so that the bent portion 5e of the discharge electrode moves in the vertical direction of the core 1. Discharge electrode inclination angle 5
The discharge electrode tip 5a is formed at the tip of the tip 1a, and the discharge electrode tip 5a is formed at a position slightly below the upper end 1a of the wick 1 so as to contact the upper end 1a of the wick and to discharge a spark. The electrode tip 5a presses the combustion portion 1b of the core 1 toward the inside, the receiving electrode edge 6a of the receiving electrode 6 faces the discharge electrode tip 5a, and the upper end 6b of the receiving electrode edge 6a is higher than the upper end 1a of the core 1. Also project upward, the lower end 6c of the receiving electrode edge 6a is located below the upper end 1a of the core 1, and the receiving electrode edge 6a is
Is formed at an inclination of the receiving electrode inclination angle 6d in the direction opposite to the discharge electrode bending portion 5e with respect to the elevating direction.

When oil is permeating the entire core 1 by capillary action, the operating lever 17 is operated to raise the core 1 and when the ignition position, which is the highest position, is reached, the ignition switch 13 is turned on. When the switch is turned on, the discharge spark 16 jumps from the discharge electrode tip 5a to the position closest to the upper end 1a of the core 1 of the receiving electrode edge 6a, and the discharge spark 16 comes into contact with the upper end 1a of the core 1 and ignites. The entire upper end 1a is lit by a fire, and a normal combustion state is brought about.

[0015]

According to the present invention, the receiving electrode edge 6a is inclined in the direction opposite to the discharge electrode bent portion 5e with respect to the elevating direction of the core 1, and the receiving electrode edge 6a
The upper end 6b of the core 1 projects upward from the upper end 1a of the core 1, and the lower end 6c of the electrode receiving edge 6a is below the upper end 1a of the core 1. Therefore, the height of the upper end 1a of the core 1 varies and varies. Also overlaps with a part of the receiving electrode edge 6a, the discharge is hindered by the fiber of the core 1 of the overlapping portion, and there is a possibility of discharging in a range from immediately above the overlapping portion to the upper end 6b of the receiving electrode edge 6a. In this range, the point immediately above the overlapping point is closest to the discharge electrode tip 5a, so that a discharge spark is generated at that point, the spark comes in contact with the upper end 1a of the core 1, and the ignition occurs. Due to variations in the rising height of the upper end 1a of the core 1 and settling of the upper end 1a, sparks always fly near the upper end 1a of the core 1 even if the height varies.
There is an effect that ignition can be stably and surely performed.

Since the discharge electrode tip 5a enters the inside of the combustion portion 1b of the wick 1, the discharge spark 16 is slightly sunk from the upper end 1a of the wick 1 so as to fly in contact with the upper end 1a of the wick 1. The spark has an effect of stably and reliably flying in contact with the upper end 1a of the core 1 and igniting immediately.

Since the bent portion 5e of the discharge electrode is inclined, the upper end 1a of the core 1 is lifted up due to long-term use, and the height of the core 1 fluctuates. Insulates the discharge electrode 5,
By slightly rotating the protecting insulator 5f, the discharge electrode tip 5
There is an effect that the height of a can be adjusted.

Since the linear receiving electrode edge 6a is formed at the end face of the metal plate and can be formed integrally with the discharge electrode supporting plate, there is an effect that the cost can be lower than that of the rod-shaped receiving electrode.

[Brief description of the drawings]

FIG. 1 is a front view of an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a main part of an up-and-down core oil combustor equipped with an ignition device according to an embodiment of the present invention.

FIG. 3 is an essential part plan view of a cross section taken along line BB of FIG. 1;

FIG. 4 is a cross-sectional view of an essential part taken along line AA of FIG. 1 when an upper end of a core at an ignition position is low.

FIG. 5 is a cross-sectional view of a main part taken along line AA of FIG. 1 when an upper end of a core at an ignition position is high.

FIG. 6 is a front view of a main part of a lead lifting device and an ignition switch.

FIG. 7 is a front view of an essential part for operating an ignition switch in conjunction with a wick elevating device.

[Description of Signs] 1 core 1a Upper end of core 1b Combustion part 1c Fluff 2 core adjuster 3 Core inner cylinder 4 Core outer cylinder 5 Discharge electrode 5a Discharge electrode tip 5b Discharge electrode tilt angle 5c Discharge electrode tip 5d Discharge electrode support plate 5e Discharge electrode bent portion 5f Discharge electrode insulator 6 Receiving electrode 6a Receiving electrode edge 6b Receiving electrode edge upper end 6c Receiving electrode edge lower end 6d Receiving electrode inclination angle 7 Combustion cylinder 8 Inner flame cylinder 9 Outer flame cylinder 10 Core vertical axis 11 Core vertical axis Metal fittings 12 Oil receiving tank 13 Ignition switch 14 High voltage generator 15 Dry battery 16 Discharge spark 17 Operating lever 18 Locking plate 18a Locking portion 19 Core descent spring 20 Interlocking plate 22 Seismic pendulum 23 Oil tank 24 Heat resistant glass outer cylinder 25 Outer Pipe

Claims (1)

[Claims] 1. A combustion part of a wick at an ignition position in which a gap between the core inner cylinder and the core outer cylinder is raised to project an upper end of the core upward from both upper ends of the core inner cylinder and the core outer cylinder. In a discharge-type ignition device of an oil-fired combustor which is provided with an inclined electrode and an electrode facing the electrode and ignites the wick by a discharge spark between the two electrodes, the tip of one electrode is moved in the vertical direction of the wick. An electrode tip bent obliquely upward and the other electrode provided with an electrode edge formed linearly in a direction opposite to the inclination of the electrode tip with respect to the elevating direction of the core in opposition thereto, The electrode tip is located at a position slightly lower than the upper end of the core so that the discharge spark contacts the upper end of the core at the ignition position, and is a position protruding inward from the outer surface of the core. The upper end protrudes upward from the upper end of the core, and the distance from the electrode tip to the electrode tip is Closer than the distance to the end, the lower end of the electrode edge is lower than the upper end of the core, and the distance to the electrode tip is closer to the electrode than the distance from the upper end of the electrode edge to the electrode tip. A discharge igniter for an oil combustor, being on the same side as the electrode tip.