JPS613923A - Ignition device for kerosene burner - Google Patents

Abstract

PURPOSE:To perform ignition completely without displacement of an ignition device and a burner, by a method wherein an ignition heater is located facing on a position in the vicinity of the exposure part of a wick, and ignition is effected by means of the heat of an ignition heater without direct contact with the wick. CONSTITUTION:A ignition heater 32 is formed such that a pair of electrodes 36 are located upright in a central recess part 35 of a U-shaped thin type unsulator 34 made of fine ceramic, and a heater coil 37 made of platinum, rhodium, spans between the electrodes 36. Fixing screws 39 are respectively inserted into screw inserting holes 38 bored in both ends of the insulator 34, the lower end of each of the screw 39 is extended into an outer flame cylinder support 33, and fixing nuts 40 are rspectively screwed thereon to locate the ignition heater upright on the outer flame cylinder support 33. This enables to perform ignition completely without displacement of an ignition device and a burner.

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to an ignition device for an oil combustor with an upper and lower wick, and particularly provides a completely new ignition device that ignites the wick without moving the burner or ignition heater. It is something to do.

<Prior art> Conventional ignition devices for kerosene stoves include those that ignite the heater by rotating it directly against the wick from inside the wick inner cylinder, and those that ignite the ignition by directly applying the heater to the wick from the outer side of the wick. Proposed methods include installing an ignition window that can be opened and closed on a part of the outside of the wick using a push-on method or a pull-a-knob method, and igniting the wick by applying the heater directly to the wick, or igniting the auxiliary wick before igniting. has been done.

An example of a conventional ignition device will be described below with reference to FIG. In the drawings, reference numeral 1 denotes a device board installed on the outer periphery of the core outer cylinder 1, on which a rotary plate 3 is rotatably supported via a shaft 4 and an elongated hole 5.

In this example, the shaft 4 is provided on the device substrate 1 side, and the elongated hole 5 is provided on the rotating plate 3 side, but the opposite pair may be used. In short, it is only necessary that the fulcrum A of the rotating plate 3, which is constituted by the shaft 4 and the elongated hole 5, is movable. An ignition handle 6 is attached to the outside of the rotating plate 3, and one end is connected to an inner flame tube 7 and an outer flame tube 8.
It is also in contact with the end of the outer cylinder 9 constituting the combustion cylinder, and lifts the combustion cylinder when rotated. Further, at the other end of the rotating plate 3, there is a shaft 2 that constitutes a fixed fulcrum B on the device board 1.
Heater angle 1lzl rotatably supported by 4
A bending portion 11 is provided which contacts the rotor and rotates the heater coil/L'lO when rotated. The heater angle)v
A heater coil 3 to which an ignition heater 12 is mounted is caulked to lo, and a movable contact 15 that constitutes an ignition heater switch together with a fixed contact 14 provided on the device board 1 side is provided. 16 is a spring shaft 24
One end is fixed to the heater angle 10, and the other end is fixed to a part of the device board 1, which functions to return the heater coil (vlo) to its original position after ignition operation.

In addition, 17 is a core, 18 is a core inner cylinder, 19 is a core outer cylinder, 20.2
1 is a lead wire, 22 is a device fixing plate, and 23 is a core adjustment knob. The ignition heater 12 has a configuration as shown in FIG. In FIG. 2, reference numeral 24 denotes electrode rods 26 and 26 whose tips are bent outward to form contact portions 25 and 25, respectively.
26 is used as an upright plug, and the contact portion If 25.25 of the electrode rods 26, 26 is slightly inside (when the contact piece 25.25 comes into contact with the core of the oil combustor, the contact between the core and the heater coil described later). The heater coil 1v27 and the contact portion 25.25 are placed in a substantially parallel relationship.

Reference numeral 28 denotes a cover provided on the plug 24 so as to cover the electrode rod 26.26 and the heater coil 27, and its tip is located approximately on the same horizontal line as the contact portion 25.25.

29 is an insulator that holds the electrode rods 26 and 26.

Next, the ignition operation will be explained. By pushing down the ignition handle 6 fixed to the rotating plate 3 in the direction of the arrow C, the rotating plate 3 rotates about the fulcrum A, and one end of the rotating plate 3 lifts the combustion cylinder in the direction of the arrow. At the same time, the bending part 11 at the lower end rubs the back side of the heater angle/l/10 which rotates as a fulcrum Bt, and rotates the heater angle/l/10 as shown by the arrow E to move the heater coil A/27 of the ignition heater 12 to the core 17. contact with. During this operation, the movable contact 15 provided on the heater angle 10 comes into contact with the fixed contact 14 provided on the device board 1, the ignition heater 12 is energized, and the wick 17 is ignited. After the ignition operation, the heater angle/L'lO is returned to its original position by the spring 16, and at the same time, the rotary plate 3 is also returned to the position before the operation.

As described above, the conventional ignition device has a mechanical structure in which the ignition handle 6 is operated in conjunction with the ignition handle 6 to lift the burner and rotate the heater angle/l/10 to bring the ignition heater 12 into contact with the wick 17. Therefore, extremely strict dimensional accuracy of each mechanism is required to ensure smooth ignition.

For example, if there is an error in the gap between the heater coil/v27 of the ignition heater 12 and the wick 17, ignition will not occur smoothly. Extreme care must be taken, and even if the process is done in this way, it has the disadvantage of producing defective products.

In other words, adding an automatic ignition device to an oil combustor has greatly improved the usability of the combustor, but on the other hand, it not only complicates the structure of the combustor but also complicates the manufacturing process at the manufacturing stage. This necessitates the introduction of high-precision machining machines, resulting in an increase in the defective rate and, in turn, an increase in the cost of the product.

In addition, because the combustion cylinder (burner) is lifted, soot is temporarily generated, and the heater coil/L of the ignition heater 12
There was also a drawback that since the '27 bit into the core 17, the glass fiber at the tip of the core got entangled with the heater coil ztz27, damaging both the core 17 and the heater coil/I/27.

<Purpose> The present invention was made in order to eliminate all of the above-mentioned drawbacks of the conventional technology.
The wick is ignited by the heat of the Masato heater without directly contacting the wick.

<Example> Fig. 3 is a perspective view schematically showing the main parts of the ignition device of the present invention.
0 is a core outer cylinder, and 31 is a core that moves up and down along this core outer cylinder 30. 32 is a new ignition heater fixed on the outer flame tube support 33 at the upper end of the core outer tube 30.

As shown in FIG. 4, this ignition heater 32 has a pair of electrodes 36.36 erected in a central recess 35 of a U-shaped thin insulator 34 made of fine ceramic.
A platinum/rhodium heater coil/L/37 is stretched between the insulators 34 and 34, and the fixing screws 39 and 39 are inserted into the screw insertion holes 38 and 38 drilled at both ends of the insulator 34, as shown in Figure 5. The lower ends of these screws 39, 39 are passed through the outer flame cylinder receiver 33, and the fixing nano) 40, 40 is screwed into this portion, thereby fixing the screws 39, 39 upright to the outer flame cylinder receiver 33. Further, the electrodes 36, 36 pass through the center of the insulator 34, and the lower end thereof is inserted into the insertion hole 33a of the outer flame cylinder support 33.

33a, and is connected to a battery power source 41 by lead wires 42 and 42. 43 is an ignition switch. In addition, the insertion holes 33a, 33a and the electrodes 36.36
There is a gap between the two and electrically insulated. Further, the electrodes 36, 36 are fixed to the insulator 34 with an inorganic adhesive (eg, cement).

FIG. 6 is a sectional view of a main part of an oil combustor equipped with the above-mentioned ignition device, in which 30 is an outer flame cylinder, 31 is a wick, and 44 is an inner cylinder. The outer flame tube 30 has a large-diameter portion 30a formed at its upper portion, and an outer flame tube support 33 is formed at the upper end of the large-diameter portion 30a. Moreover, a lover 46 having an inner flame cylinder support 45 on the periphery is placed on the upper end of the core inner cylinder 44. 47 is a burner consisting of an inner flame tube 49 and an outer flame tube 50, which are placed on each of the flame tube supports 33 and 45.

Further, the ignition heater 32 is located between the end of the outer flame tube support 33 on the wick 31 side and the outer flame tube 49. ignition.

During combustion, the upper end of the wick 31 is about 14 mm from the receiver 33.45, whereas the upper end of the insulator 34 is about 10 to 14 mm from the receiver 33. It has become. In addition, the thickness of the 碍・子 34 is about 3 mm, and the width is about 10 to 18 mm. Therefore, the ignition heater 32 has no problem with the vertical movement of the wick 31.

In the state shown in FIG. 6, when the ignition switch 43 is turned on, the coil heater 37 is energized and its temperature reaches 12
The temperature is raised to about 00°C to 1300°C.

Due to this heat, the petroleum gas vaporized from near the upper end of the wick rises while passing through the coil heater 37, and due to the catalytic action of platinum, ignition combustion begins. When combustion starts, the temperature at the top of the wick increases, the amount of oil vaporized increases, the mixed gas concentration increases, and combustion in the ignition heater stops.

Although the coil heater 37 of the above-mentioned ignition heater 32 corresponds to the upper end of the wick, it can be ignited sufficiently even if it is 4 to 5 degrees below the upper end of the wick or 2 to 3 degrees above the upper end of the wick.

The ignition heater 32 used in the present invention differs from the ignition heater 12 shown in FIG. 2 in the following points. Conventional ignition heater 12
is large and cannot be installed between the inner and outer flame cylinders, and cannot withstand the combustion heat. On the other hand, the ignition heater 32 of the present invention is made of fine ceramic to cover and support the electric 1i36.36, and is very compact, yet can withstand combustion heat for a long period of time. Can be done. Also, when lifting and lowering the burner 47, or due to an external impact, the burner 47 may be damaged by the ignition heater 3.
It also has enough mechanical strength to withstand even if it hits 2. In other words, the ignition heater 32 of the present invention using fine ceramics is the first ignition heater that can be installed between the inner and outer flame cylinders and can withstand actual use.

As described above, according to the ignition device of the present invention, there is no need for a mechanism to lift the shivana that moves the ignition heater,
The structure of the combustor can be greatly simplified.

Moreover, since less soot is generated during ignition, there is no damage to the heater coil, which reduces the burden of maintenance.

[Other Embodiments] (11 In Fig. 7(a), the insulator 34 is formed into a curved plate shape forming a part of an arc as shown in Fig. 7(b), and the thickness of the insertion hole 38 and 38 portions is made sufficient. This makes manufacturing easier and has improved strength.

Reference numeral 51 indicates a U-shaped heater guide, and reference numerals 52 and 52 indicate electrodes bent outward into an L-shape at the upper ends of electrode insertion holes 53 and 53. In this way, it becomes easy to position and fix the electrode 52°520. The plate thickness of the insulator 34 is about 2 to 4 gm, but in the case of the shape shown in Fig. 4, the wall thickness at both ends is thin as shown in Fig. 7 (c), and there are various problems in terms of longevity and strength. On the other hand, if the shape shown in FIG. 7 is used, the plate thickness will be anywhere from 2 to 4 gm, so the manufacturing yield margin will be good and the strength will be high.

(2) In FIG. 8, the end face of the insulator 34 is rounded.

(3) In FIG. 9, U grooves 54 and 54 for preventing rotation are provided on the opposing inner surfaces of the central recess 35 of the insulator 34, and the insulator 3
Notches 55 and 55 are provided on the lower end surface of 4 to prevent the t-poles 56 and 56 from rotating and being removed. The electrode 56 is bent outward in an L-shape at the upper end of the electrode insertion hole 53 and is inserted into the U-groove 54 .
54, is bent at a right angle at the lower end of the insertion hole 53, and extends outward through the notches 56, 56. Therefore, the electrodes 56, 56 are completely prevented from coming off in the vertical direction and rotating from side to side, and are stably fixed. Therefore, it is possible to weld the heater coil 37 after the electrodes 56 and 56 are attached, which improves long-term workability. It is difficult to install the heater coil/l/37 unless the electrode is fixed stably, so the work involves attaching the electrode to the insulator with the heater coil/l/37 fixed in advance, as shown in Figure 9. It is not possible to bend the electrodes, and the electrodes must be fixed to the insulator using adhesive.

(4) In FIGS. 10(a) and 10(b), a seven-ramic heater 57 is used as the heating section instead of the heater coil. The ceramic heater 57 is inserted through a seven-hole hole 58 provided in the center of the insulator 34 and fixed with an inorganic adhesive 59. 57'a is a heater heat generating part, and 57b is an air hole that improves ignition performance.

60 is a heater pattern of the ceramic heater 57; 61.
A heater electrode 61 is electrically connected to the power source 41. 6
3 is a U-shaped fixing bolt/protection frame with both legs acting as fixing bolts and fixed via the core outer cylinder 33) 40.40
The insulator 34 is fixed onto the core outer cylinder 33 by screwing them together.

(5) In FIG. 11, the ignition heater 32 is detachable. 64 is riveted to the outer peripheral wall of the core outer cylinder 33 (64
5) A cylindrical socket made of heat-resistant resin and insulator.
The peak opening 66 is an opening 33' bored into the outer flame tube holder.
It is set in a. Socket terminals 67 and 67 made of a conductive material are fixed to the inner wall of this socket 64,
Its lower end hangs below the socket's lower end.

The ignition heater 32 is basically the same as that shown in FIGS. 7(a) and 7(b), but the lower portions of the electrodes 52, 52 are folded back outward to form contact electrodes 52a, 52a. The points are different.

When fixing the ignition heater 32, the lower part is fitted into the socket 64 through the opening 66, and the contact electrode 52a is inserted.

52a is pressed against the socket terminal 67.67.

Since the height of the insulator 34 is determined by the stepped portions 68, 68, mechanical fixing, positioning, and electrical connection are completed simply by fitting the ignition heater 32 into the socket 64. Note that the socket terminals 67.67 are connected to a power source.

With this configuration, the ignition heater 32 is removable, so if tar gets on it during use, it can not only be removed and cleaned easily, but also easily replaced if damaged. It's easy to do.

(6) When ignited and combustion starts in the condition shown in Figure 6, the first
As shown in FIG. 2, the outer flame cylinder 49 has a large number of air holes 49a,
49a... are drilled and there is a gap near the ignition device 32 mounting part, so this air hole 49a +
Air flows in from the gap between 4'9 a... and the mounting part,
Due to the over II of the incoming air, 75 blue flames are generated near the heater coil /l/37 (shaded area), the temperature becomes high, the heater coil 37dE is emitted, which has a negative impact on the durability, and the incoming air is near the ignition heater 32. The fuel increases and burns irregularly, producing a combustion sound.

Therefore, by blocking the air holes 49a + 49a... of the outer flame tube 49 portion corresponding to the ignition heater 32, and reducing the air flow flowing into the 5-flame heater 32 portion,
The oil combustor shown in FIGS. 13 and 14 suppresses the occurrence of the above phenomenon.

In the figure, 69 is a stainless steel plate spot-welded to the corresponding part of the ignition heater 32 of the outer flame cylinder 49, and the air hole 49
．． ．． 49a... is covered. Also, stainless steel plate 69
Alternatively, the air holes 49a, 4, 9a, . . . may not be provided in the portion covered by the stainless steel plate 69. Note that the ignition heater 32 is provided inclined toward the wick 31 side.

In this way, the amount of air flowing into the ignition heater 32 portion is limited, so that stable combustion with a good balance can be achieved as a whole.

<Effects> According to the present invention, ignition can be performed without displacing the ignition device and burner at all, so the conventional ignition mechanism is not required, and the structure of the combustor is greatly simplified. can do.

Moreover, the ignition heater uses an insulator made by Nanamiku to hold and protect the heater coil or ceramic heater, so it can be made compact enough to be placed between the inner and outer flame cylinders, and even when it is in that position. Can withstand combustion heat for a long time.

[Brief explanation of drawings]

Figure 1: A cross-sectional configuration diagram of main parts showing an example of a conventional ignition device for a kerosene heater. Figure 2: A cross-sectional side view showing an example of an ignition heater. Figure 3:
A schematic perspective view of the main parts showing an embodiment of the present invention, FIG. 4: An enlarged exploded perspective view of the main parts of FIG. 3, FIG. 7(a), (b), (C): External perspective view of another ignition heater, a plan view of its insulator, and a plan view of the insulator of FIG. 4, FIG. 8 , Figure 9: Further ignition heaters
. 10(a), (b): Still another perspective view and sectional view of the ignition peak; FIG. Main part side view, Figures 13 and 14l: A cutaway view and a side view of the main part of a kerosene stove equipped with an ignition device. Code 32: Ignition heater, 34: Insulator, 36: Electrode,
37: Coil heater. Agent Patent Attorney Aihiko Fukushi (and 2 others) Condolences/Group No. 2 [I゛ No. 5 A. Figure 6 Figure 7 [21tσ] Figure 9 Figure 10 tσ 1st/Figure

Claims (1)

[Claims] 1. An oil combustor that burns oil by igniting the exposed part of the wick. An ignition heater is installed at a position corresponding to the exposed part of the wick, and the wick is ignited by the heat of the ignition heater. The ignition device for an oil burner is characterized in that the ignition heater has a heater coil or a ceramic heater positioned in a recessed portion of a ceramic insulator.