JPH0330769B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a combustion device used for home heating and the like.

BACKGROUND TECHNOLOGY In general, this type of combustion device vaporizes and burns fuel by exposing the tip of the wick D to a combustion chamber C formed between an inner flame tube A and an outer flame tube B, as shown in Fig. 2. The combustion amount is normally adjusted by changing the exposure height of the lamp wick D exposed in the combustion chamber C. The wider the adjustment range of combustion amount, the more comfortable and convenient it is for the user.
When the amount of combustion is low, the amount of combustion exhaust gas, particularly carbon monoxide, generally increases, producing an odor, so the adjustment range is narrow. Additionally, if the oxygen concentration in the room you use falls (due to insufficient ventilation), combustion will break down and a large amount of carbon monoxide and bad odor will be released, creating a dangerous situation. Furthermore, when extinguishing a fire, incomplete combustion of residual gas produced a pungent odor, which caused discomfort. In order to prevent the generation of carbon monoxide and odors as described above, conventionally a catalyst body E is installed at the upper end opening of the combustion cylinder so that the combustion exhaust gas passes through the inside, and this catalytic action reduces the combustion exhaust gas. It was starting to purify. Next, it is preferable for this type of combustion device to supply as much of the total thermal energy obtained through combustion as radiant heat, and there have been proposals to increase the ratio of radiant heat (radiant efficiency). being done.

Problems to be Solved by the Invention However, in the above configuration, the combustion exhaust gas flows directly above the combustion C in the direction of the arrow F due to the thermal draft, so it is concentrated in the shaded area G, which is a part of the catalyst body E. do. Therefore, the thermal draft force of the combustion tube decreases, the amount of air supplied to the combustion chamber C is insufficient, the exhaust gas purification efficiency is poor, and the catalyst deteriorates because this part becomes excessively hot compared to other parts. This caused problems with durability. In addition, from the point of view of radiation efficiency, most of the combustion heat of the flame f formed in the upper part of the combustion chamber C is not converted into radiant heat.
The heat was simply supplied as convective heat, resulting in low radiation efficiency.

The present invention solves such conventional problems,
By avoiding concentration of combustion exhaust gas in one part and making the temperature distribution of the catalyst uniform, we aim to improve purification efficiency and prevent the generation of carbon monoxide and odor.
The objective is to provide a combustion device that has improved durability, high radiation efficiency, and improved safety and comfort.

Means for Solving the Problems In order to solve the above-mentioned problems, the combustion device of the present invention includes a catalyst body disposed at the upper end opening of the combustion cylinder, and a catalyst body placed below and in contact with the catalyst body in the upper part of the combustion chamber. A shielding plate is provided at a predetermined distance from the medium, and an incandescent body is provided downward from the inner peripheral edge of the shielding plate.

Effects According to the present invention, the flow path is changed so that the combustion exhaust gas rising almost directly above the combustion chamber is discharged from the center of the catalyst body by the shielding plate, and the shielding plate and A part of the combustion exhaust gas is also discharged from the outer edge of the catalyst body through the space between the catalyst body and the combustion exhaust gas, so that the combustion exhaust gas is discharged while being dispersed substantially uniformly over a wide area of the catalyst body. Next, the combustion heat is transferred to the flame formed in the upper part of the combustion chamber by the flow of the combustion exhaust gas mentioned above.The flow path is changed by the shielding plate, and most of the high temperature combustion exhaust gas is transferred from the inner peripheral edge of the shielding plate. Since the light can pass through the opening of the incandescent body provided facing downward, the incandescent body can be heated to a high temperature.

Embodiment Hereinafter, an embodiment of the present invention will be described based on the accompanying drawings.

In Fig. 1, 1 is the inner flame tube, 2 is the outer flame tube, and 3 is the inner flame tube.
is an outer cylinder, and the three parts are arranged approximately concentrically from the inside. Reference numeral 4 denotes an outer cylinder made of a heat-transmitting material such as glass, which is placed on the outer cylinder 3, and its upper end is connected to the inner flame cylinder, the outer flame cylinder 1,
It extends upwards from 2. 5 is inner flame tube, outer flame tube 1,
In the combustion chamber formed between the two, the tip of the lamp wick 6 is exposed in the combustion chamber 5, where combustion is vaporized and burned, and a flame f is formed at the upper end of the combustion chamber 5. 7 is a catalyst body provided in the opening at the upper end of the combustion cylinder. 8 is a shielding plate that connects the catalyst body 7 below the catalyst body 7.
and is provided at the upper part of the combustion chamber 5 with a predetermined interval 9 therebetween. 10 is an incandescent body provided downward from the inner peripheral edge of the shielding plate 8. Further, the outer peripheral end portion of the shielding plate 8 is provided so as to cover the outer periphery of the catalyst body 7, and the shielding plate 8 also serves as the exterior 11 of the catalyst body 7. In the above configuration, during combustion, the combustion exhaust gas rises almost directly above the combustion chamber 5 as shown by arrow a due to the thermal draft, but since the shielding plate 8 is provided, the combustion exhaust gas flows as shown by arrow b. The path is changed and the exhaust gas is discharged from the central part A (hatched area), and since a shielding plate 8 is provided below the catalyst body 7 at a predetermined interval 9, a part of the combustion exhaust gas flows through the flow path as shown by arrow C. is also discharged from the outer edge B of the catalyst body 7. Therefore, the combustion exhaust gas is almost uniformly dispersed over a wide area of the catalyst body 7, and the contact between the combustion exhaust gas and the catalyst body 7 becomes uniform, which greatly improves the purification efficiency and reduces monoxide oxidation at low combustion levels. It prevents the generation of carbon and odors and expands the range of adjustment. It can also significantly reduce the generation of carbon monoxide and odors when the oxygen concentration in the room decreases, and the residual gas generated when extinguishing a fire can be combusted through catalytic action, making it practical to reduce the generation of irritating odors. You can eliminate all of them. In addition, since the combustion exhaust gas no longer concentrates on a part of the catalyst body as in the conventional case, it is possible to prevent the thermal draft force of the combustion tube from decreasing and excessively high temperatures to occur locally, which prevents deterioration of the catalyst and increases durability. Sexuality also improves.
Next, the ratio of radiant heat to the total thermal energy can be increased by increasing the temperature of the radiant source, increasing the radiant area, etc. The incandescent body 10 provided downward from the inner peripheral edge of the shielding plate 8 can increase the radiation area, and the combustion heat of the flame f formed in the upper part of the combustion chamber 5 is transferred by the flow of combustion exhaust gas. However, shielding plate 8
As a result, the flow path is changed as indicated by the arrow b as described above, and the high temperature combustion exhaust gas can be passed through the opening of the incandescent body 10, so that the incandescent body can be heated to a high temperature and high radiation efficiency can be ensured.

Effects of the Invention As described above, according to the combustion apparatus of the present invention, the following effects can be obtained.

(1) The combustion exhaust gas is almost uniformly dispersed over a wide area of the catalyst body, which greatly improves the purification efficiency, which reduces the generation of carbon monoxide and odors when the amount of combustion is low. It can be used by widening the range of adjustment to reduce the amount of combustion. It is also possible to significantly reduce the generation of carbon monoxide when the oxygen concentration in the room being used decreases. Furthermore, since the residual gas generated during extinguishing can be combusted, the generation of irritating odors can be virtually eliminated.

(2) Since the ventilation resistance of combustion exhaust gas can be reduced to prevent a decrease in thermal draft force, a sufficient amount of air can be supplied to the combustion chamber.

(3) Since the combustion exhaust gas does not concentrate on a part of the catalyst, the catalyst does not become extremely hot locally, and the temperature distribution becomes almost uniform, which suppresses deterioration of the catalyst. can.

(4) The radiation area is increased by the incandescent element provided downward from the inner peripheral edge of the shielding plate, and the high-temperature combustion gas can pass through the opening of the incandescent element, allowing the incandescent element to be heated to a high temperature. The ratio of radiant heat in energy increases, resulting in high radiant efficiency.

Therefore, it is possible to provide a combustion device with excellent safety, comfort, and durability, and with high radiation efficiency.

[Brief explanation of the drawing]

1A and 1B are a sectional plan view and a sectional side view of a main part of a combustion device according to an embodiment of the present invention, and FIGS. 2A and 2B are a sectional plan view and a sectional side view of a main part of a conventional combustion device. . 1... Inner flame tube, 2... Outer flame tube, 3, 4... Outer tube, 5... Combustion chamber, 6... Light wick, 7... Catalyst body,
8... Shielding plate, 9... Spacing, 10... Red-hot body, 1
1...Exterior.

Claims (1)

[Claims] 1. A combustion tube is constructed by arranging an inner flame tube, an outer flame tube, and an outer tube extending upward from the inner flame tube and the outer flame tube in a substantially concentric manner from the inside to the outside. A catalyst body is arranged at the upper end opening of the combustion cylinder, a predetermined distance is provided below the catalyst body from the catalyst body, and a combustion chamber formed between the inner flame cylinder and the outer flame cylinder is A combustion device comprising a shielding plate provided on the upper part and a red-hot body provided downward from the inner circumferential edge of the shielding plate. 2. The combustion apparatus according to claim 1, wherein the outer peripheral end of the shielding plate is provided to cover the outer periphery of the catalyst body, and the shielding plate also serves as a catalyst body exterior.