JPS61134513A - Kerosene burner - Google Patents

Abstract

PURPOSE:To enable a substantial increase of thermal radiation volume with a simple construction by a method wherein a flat combustion chamber formed with a porous plate acting as a red heater and an outer cylinder having a window member composed of a thermal radiation transparent substance are arranged. CONSTITUTION:A flat combustion chamber 14 is formed by a porous plate 7 acting as a red heating body 7C, an outer cylinder 8 having a window member 9 composed of a thermal beam transparent substance is arranged at a position opposing to the red heating body 7C, an air passage formed between the porous plate 7 and the outer cylinder 8 is made such that a width of a side (front side) where the red heater 7C is placed is made narrower than that of the other side (rear side). A rate of opening of the red heater 7C is made higher than that of the porous plate 7 except the red heater, an upper red heater is arranged in the chimney formed at the upper part of the outer cylinder 8 and a damper 23 is arranged at the downstream side of the chimney. In this way, an amount of air at the rear side is increased and thereby an amount of burning at the rear side is increased, a temperature of an entire combustion part is increased, an amount of air at the front side is reduced and a cooling action at the front side is decreased, thereby the temperature of the red heater at the front side is increased and the amount of radiation can substantially be increased.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a heat-radiating lamp wick type oil combustor having a flat combustion chamber.

Conventional technology In conventional radiant oil combustors with this type of combustion chamber, it is difficult to direct the heat rays radiated backwards forward, so it is difficult to direct the heat rays radiated backwards as much as possible. In order to increase the radiation as much as possible, a measure was taken to increase the amount of air supplied from the front side to increase the amount of combustion on the front side and raise the temperature (for example, Japanese Utility Model Publication No. 47-31221). Problems with this conventional type: Since the amount of combustion at the rear is insufficient, the amount of radiation emitted to the front is greater than the amount to the rear, but it is difficult to increase the overall m of the combustion section. . Furthermore, when the amount of air at the front side is increased, heat exchange between the air and the front side member becomes active, and due to the cooling effect of the air,
Despite efforts to increase the temperature by activating combustion, the result is a contradictory effect. As is well known, the amount of heat radiated from a heat source is proportional to the fourth power of the absolute temperature, so if the radiant heat source does not reach a sufficiently high temperature, this can be a fatal drawback for this type of combustor. Ta.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention aims to create a flat combustion pattern using a perforated plate, at least a part of which is an incandescent body, and to generate air between the perforated plate and the outer cylinder. The passageway should be on the side with the red-hot body (
The width of the front side is narrower than the other side (rear side).

In addition, the aperture ratio of the incandescent body should be smaller than that of the perforated plate excluding the incandescent body, and if necessary, form a flue in the upper part of the outer cylinder, and in the flue, form an upper incandescent body. of,
A damper is provided on the downstream side of the flue.

Function: As configured above, the present invention increases the amount of combustion at the rear side by increasing the amount of air at the rear side and raises the temperature of the entire combustion section, and also reduces the amount of air at the front side, thereby improving cooling at the front side. By reducing the effect, it is possible to increase the temperature of the front incandescent body, which is the radiation surface of the heat rays, and increase the total amount of heat radiation.

Embodiment FIG. 1 shows an outline of an embodiment according to the present invention in a vertical sectional view.

In FIG. 1, reference numeral 1 denotes a lamp wick, which is moved up and down by a knob 2. 3 is a tank for storing petroleum fuel 4, and a perforated plate 7 forming a flat combustion chamber 14 is placed on a fire pan 5. The perforated plate has a large number of holes 7J and 7 for air supply.
It consists of a rear multi-hole plate 7 & having m, γn, a front perforated plate 7b, and a red-hot body C1, and the aperture ratio is as follows:
The configuration is such that f7 is also increased to increase the red-hot temperature.

The outer cylinder 8 is composed of an outer cylinder rear side 8b, an outer cylinder front side 8b, and a window member 9 made of a heat-transparent material, and is placed on an outer cylinder stand e. At this time, the air passage formed between the outer cylinder 8 and the perforated plate 7 is wider than the rear passage 1ot and the front passage 11.

In the above configuration, during combustion, air is introduced from the air population 13 by draft, and the holes -rl, 7 m of the perforated plate 7
, 7n to the combustion chamber 14, a part of the fuel vaporized from the lamp wick 1 is combusted, and finally it is completely combusted in the secondary combustion section 16, and is exhausted outside the vessel from the exhaust gas outlet 12.

FIG. 2 shows another embodiment according to the invention in longitudinal section.

Also in the configuration shown in FIG. 2, the rear air passage 10 is wider than the front passage 11. A secondary partition plate 20 has a secondary outlet 21 above the combustion chamber 14. The upper part of the outer cylinder 8 constitutes a flue sc'6, and there are many holes 22 in the flue 8C.
An upper incandescent body 22 having aLi is arranged. Reference numeral 23 is a damper for controlling the draft force by opening and closing the damper, thereby controlling the combustion amount, and is installed at the most downstream side of the flue 8C.

In this configuration, first, in order to raise the temperature on the front side, the incandescent body 7C has a large aperture ratio and a small heat capacity.

Therefore, air easily enters from this part, and if a large amount of air enters, the dynamic pressure will cause the flame to move to the rear and prevent the red-hot temperature from rising.To avoid this, the outer cylinder 8 and the red-hot body 7C It is advantageous for the front air passage 11 formed between the two to have the minimum necessary width. On the other hand, in this embodiment, the rear air passage is widened. Therefore, the amount of air passing through this section, and eventually the combustion at the rear of the combustion chamber 14, becomes active and the temperature rises. However, since the width of the airflow in this area is wide and the flow rate is high, the insulation and cooling effect of the air prevents the rear side of the outer cylinder located on the outside.
The temperature in step 4 becomes extremely difficult to rise. Therefore, the outer cylinder rear side 8
It is possible to minimize the heat radiation from a, and conversely, in the front side 8b of the outer cylinder, the width of the front air passage 11 is narrow and the air flow rate is small, so the incandescent body 7C is as described above. Since the temperature of the front side 8b of the outer cylinder also increases, the amount of heat radiated to the front side increases.

Furthermore, in the embodiment shown in FIG. 2, if the air amount is controlled and the combustion amount is adjusted by opening and closing the damper 23 downstream of the flue 8C, the upper incandescent body 2 installed in the flue 8C
The amount of heat radiation increases further due to the red heat of the upper part 2, and since the rear air passage 10 is wide, it is possible to shorten the secondary flame, and the flame reaches the upper part of the red heat part 2.
There is also no phenomenon of unburned toxic gas being generated by contact with 2. Therefore, within a wide combustion range, the amount of heat radiation is constant and the exhaust gas is clean.

Effects of the Invention As described above, according to the present invention, it is possible to obtain an extremely practical effect of increasing the amount of heat radiation within a wide variation range of combustion amount with a simple configuration. .

[Brief explanation of drawings]

1 and 2 are longitudinal sectional views of an oil combustor in an embodiment of the present invention. 1...Light wick, 7...Perforated plate, 7C...
...Red-hot body, 8...Outer cylinder, 9...
Window, 10... Rear passage, 11... Front passage, 14... Combustion chamber, 8 &... Flue, 2
2... Upper red-hot body, 23... Damper. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
figure

Claims (3)

[Claims] (1) A flat combustion chamber with a vertically movable lamp wick arranged at the bottom, at least a part of which is formed by a perforated plate that serves as an incandescent body, and heat rays transmitted at a position located outside of the combustion chamber and facing the incandescent body. and an outer cylinder having a window member made of a sexual substance,
In the oil combustor, the air passage formed between the perforated plate and the outer cylinder is configured such that the rear passage is wider than the front passage. (2) The oil combustor according to claim 1, wherein an upper part of the outer cylinder forms a flue, an upper incandescent body is provided in the flue, and a damper is provided on the downstream side of the flue. (3) The oil combustor according to claim 1 or 2, wherein the incandescent body has a larger aperture ratio than the perforated plate excluding the incandescent body.