JPS6222758Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a combustion device that uses vaporized oil fuel such as kerosene or gaseous fuel such as city gas, and in particular, the invention relates to a combustion device that uses a vaporized oil fuel such as kerosene or a gaseous fuel such as city gas. This relates to the structure of the flame-holding plate surrounding the flame-holding plate.

Conventionally, as this type of combustion device, for example, as shown in FIG. 3, a flame port a whose peripheral surface is opened,
A rising portion _b1 of a predetermined height that is arranged so as to surround the flame opening a with a predetermined gap;
b ₁ An annular flame holding plate b consisting of a mounting part b ₂ extending outward from the lower end, and a flame opening a whose tip is between the flame opening a and the rising part b ₁ of the flame holding plate b. It is known to have an electrode plug c and a flame rod d facing each other, and to ignite the gaseous fuel flowing out from the flame port a by the discharge arc of the electrode plug c. Note that f is a vaporizer and g is a chamber.

By the way, the electrode plug c and the flame rod d need to be accurately positioned relative to the burner port a (gap), and also need to be prevented from leaking from the flame holding plate b. On the other hand, flame holding plate b
has the function of preventing the lift of the flame h, the function of sending secondary air (indicated by arrow i) into the secondary combustion part of the flame h, and the function of preventing the flame h from entering the chamber g on the carburetor side. Therefore, it is necessary to install it near the periphery of the flame outlet a and to provide a rising part _b1 of a predetermined height.

Therefore, conventionally, the electrode plug c and the flame rod d have been bent in a complicated shape above the flame holding plate b so that their tips face the flame opening a in order to prevent the flame holding plate b from coming into contact with them. there was. Therefore, the mounting plate e for attaching the electrode plug c and the flame rod d to the housing is exposed to the flame h, and as a result becomes extremely hot, and the electrode plug c and the flame rod d themselves also become hot, causing problems in terms of durability. It was hot.

In addition, as a countermeasure, the mounting plate e is
It is conceivable to attach the electrode plug c and the flame rod d by curving the electrode plug c and the flame rod d outward so as to move away from the gap, but this makes it difficult to align the electrode plug c with the flame opening a, and the electrode plug c and the flame rod d cannot be placed at the predetermined gap position. It has the disadvantage that it is difficult to

Therefore, the present invention has been developed in view of these points, and an insertion recess that bulges outward is formed in a part of the rising part of the flame stabilizing plate, and the electrode plug and flame rod are inserted through the insertion recess. By inserting the plug from below so that each tip faces the flame opening, the electrode plug and flame rod can be placed below the flame opening without coming into contact with the flame holding plate, thus ensuring flame stabilization. It is an object of the present invention to provide a combustion device which can protect an electrode plug and a flame rod from high temperatures and improve their durability with a simple structure without impairing the function of the plate.

That is, the present invention provides a flame outlet with an open peripheral surface, a rising part of a predetermined height that is arranged to surround the flame mouth with a predetermined gap, and a rising part extending outward from the lower end of the rising part. an annular flame holding plate consisting of an extended mounting portion; an electrode plug and a flame rod each having a tip facing the flame port between the flame port and the rising portion of the flame holding plate; In a combustion device in which gaseous fuel is ignited by a discharge arc of an electrode plug, an insertion recess that bulges outward is formed in a part of the rising part of the flame stabilizing plate, and the electrode plug and flame rod are inserted downward. The device is characterized in that it is inserted through the insertion recess so that each tip faces the flame opening.

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

Fig. 1 shows an example in which the present invention is applied to an oil burner A for a hot-air blower, in which 1 is a housing, and 2 is a drive shaft 3 disposed in the center of the housing 1 with the drive shaft 3 in the vertical direction. A motor 4 is an oil pump for oil feeding driven by the motor 2 disposed below the double-shaft motor 2.
has a pump chamber 7 in which oil fuel is supplied through an oil supply port 6 in a pump receiver 5;
is a center hole 8 through which the drive shaft 3 passes through.
an oil reservoir chamber 7a that is vertically partitioned by a partition plate 8 having a diameter of 1.a and communicates with the oil supply port 6;
A rotor chamber 7b is formed in and communicated with through the center hole 8a of the partition plate 8, and the lower end of the drive shaft 3 of the double-shaft motor 2 extends into the rotor chamber 7b. An oil rotor 9 is fixed to the
The oil rotor 9, which rotates with the rotation of the drive shaft 3 of the motor 2, is configured to suck oil from the oil reservoir chamber 7a into the upper part of the rotor chamber 7b and discharge it from the lower part of the rotor chamber 7b.

Furthermore, the upper end of the drive shaft 3 of the double-shaft motor 2 extends to the center of the carburetor 18, which will be described later, and an oil supply passage 10 is formed in the center of the drive shaft 3. The lower end of the oil supply passage 10 communicates with the rotor chamber 7b of the pump chamber 7 via an orifice 11 with a filter. On the other hand, a boss member 1 is provided at the upper end of the drive shaft 3 and has a vertical communication passage 12 that communicates with the upper end of the oil supply passage 10.
3 is connected to the boss member 13 and the upper end of the drive shaft 3 with a diffusion material 14 sandwiched therebetween. ) with multiple openings (for example, 4
horizontal discharge ports 15, 15, .
Diffusion vane 1 having collision plate portions 16a, 16a... facing each horizontal discharge port 15 with a certain angle deviation
6 is installed. Therefore, the oil from the oil pump 4 is transferred to the oil supply passage 10 of the drive shaft 3 and the boss member 1.
Each horizontal discharge port 15, 15 via the communication path 12 of 3
... is discharged in the horizontal direction, and the discharged oil is diffused by the diffusion plate 14 and the diffusion vanes 16, and is atomized by collision with the collision plate parts 16a, 16a, etc. of the diffusion vanes 16, and then enters the vaporizer 18. configured to supply.

On the other hand, 17 is a combustion air plate fan fixed to the upper part of the drive shaft 3 of the double-shaft motor 2 and driven, and 18 is an oil fuel disposed above (downstream) of the plate fan 17 at a predetermined distance. A preheating electric heater 19 is disposed on the outer periphery of the vaporizer 18 to heat the vaporizer 18 to promote vaporization. Through the cylindrical vaporization cylinder 2
1, and a flame port 22 made of wire mesh is formed on the outer peripheral surface of the vaporization tube 21, while an electrode plug 23 for ignition and a flame rod are located near the flame port 22 and facing each other through a gap. 24 is arranged, the oil fuel supplied to the vaporizer 18 and vaporized by the vaporizer 18 is mixed with the air taken in by the plate fan 17 from the intake port 25 opened in the housing 1, and this gaseous state is mixed. It is configured to ignite and burn fuel at the flame port 22 by a discharge arc from an electrode plug 23.

In addition, 26 is a leak hole that opens the oil supply passage 10 upward through the communication passage 12 of the boss member 13 so as to leak air mixed in the oil supply passage 10, and 27 is a leak hole that opens the oil supply passage 10 upwardly through the communication passage 12 of the boss member 13. a mounting plate 28 for fixedly supporting the mounting plate 27;
This is a vortex prevention plate formed in the pump chamber 7 for suppressing the generation of vortices to prevent air from being drawn into the rotor chamber 7b of the pump chamber 7. Also, 29
30 is a protective cover plate 29 for preventing oil from entering from the lower surface of the motor 2;
A scattering plate 31 is provided at the intake port 25, and is fixed to the drive shaft 3 inside the protective cover plate 29, and scatters the oil that has entered the protective cover plate 29 around and causes it to fall along the inner surface of the protective cover plate 29. damper, 3
2 is an oil drain hole.

As a feature of the present invention, an annular flame holding plate 33 is provided around the flame outlet 22 so as to surround the flame outlet 22 with a predetermined gap, and an electrode plug 23 and an electrode plug 23 are provided between the flame outlet 22 and the flame outlet 22. The frame rods 24 are disposed so that each end of the frame rod 24 is interposed therebetween. As shown in detail in FIG. 2, the flame stabilizing plate 33 has a rising portion 33a rising to a predetermined height along the flame outlet 22, and is attached to the housing 1 by extending outward from the lower end of the rising portion 33a. A part of the rising part 33a is formed with two half-cone-shaped insertion recesses 33c, which are partially bulged outward. Then, the flame rod 24 is inserted from below through the insertion recess 33c so that the respective tips face the flame port 22, so that the electrode plug 23 and the flame rod 24 are inserted into the housing 1 at a position below the flame port 22.
It is configured to be installed on.

Therefore, in the embodiment described above, the electrode plug 23 and the flame rod 24 are inserted obliquely upward from below through the insertion recess 33c of the flame stabilizing plate 33, and are arranged with their respective tips facing the flame port 22. By doing so, each tip can be placed at a position below the flame port 22 with a predetermined gap with respect to the flame port 22 without contacting the flame holding plate 33 and without forming a complicated bent shape. Therefore, the electrode plug 23 and flame rod 24 are not exposed to the flame from the flame port 22, and their durability can be improved and their shape and structure can be simplified.

Furthermore, since the insertion recess 33c is formed by molding only a part of the rising portion 33a of the flame-holding plate 33 outward, the function of the flame-holding plate 33 itself,
In other words, it does not impair the flame lift prevention function, the function of sending secondary air into the secondary combustion part of the flame, the function of flame intrusion into the chamber on the side of the vaporizer 18, etc., and can be easily formed.

Incidentally, in the above embodiment, an example was described in which the oil burner A was applied to a vertical type, but the present invention can be applied to a vertical type oil burner A, regardless of whether it is a vertical type or a horizontal type, and uses vaporized oil fuel or gaseous fuel such as city gas. It can be applied to various types of combustion equipment.

As explained above, according to the present invention, an insertion recess that bulges outward is formed in a part of the rising part of the flame stabilizing plate, and the electrode plug and flame rod are inserted from below through the insertion recess. Since each tip faces the flame opening, the electrode plug and flame rod can be easily connected to the flame opening in a specified gap without impairing the function of the flame holding plate. The electrode plug and flame rod can be easily and accurately positioned below the flame nozzle, thereby facilitating alignment and assembly of the electrode plug and flame rod, and improving their durability. be.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a longitudinal cross-sectional view of the overall structure, FIG. 2 is a perspective view of a flame-holding plate, and FIG. 3 is a longitudinal cross-sectional view of essential parts showing a conventional example. A... Oil burner, 21... Vaporizer cylinder, 22...
... Flame port, 23 ... Electrode plug, 24 ... Flame rod, 33 ... Flame holding plate, 33a ... Rising part,
33b...Mounting portion, 33c...Insertion recess.

Claims (1)

[Scope of utility model registration request] A flame port 22 with an open peripheral surface, a rising portion 33a having a predetermined height, and a rising portion 33a surrounding the flame port 22 with a predetermined gap.
an annular flame holding plate 33 consisting of a mounting portion 33b extending outward from the lower end of the electrode plug 23 and an electrode plug 23 whose tips face the flame opening 22 between the flame opening 22 and the flame holding plate 33; Frame rod 24
In the combustion apparatus, the gaseous fuel flowing out from the flame port 22 is ignited by the discharge arc of the electrode plug 23, and the flame stabilizing plate 33 includes an insert that bulges outward in a part of the rising portion 33a of the flame stabilizing plate 33. Recessed portion 33c
A combustion device characterized in that an electrode plug 23 and a flame rod 24 are inserted from below through the insertion recess 33c so that their tips face the flame port 22.