JPH0220583Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a combustion appliance having a catalyst cylinder installed for the purpose of purifying and deodorizing harmful gases.

Conventionally, it is well known that a catalyst cylinder with a catalyst body inside is provided above the combustion cylinder, but this catalyst cylinder is not treated in any way and is made of a base material such as highly heat-resistant stainless steel, so that the catalyst The inner surface of the cylinder is flat and has strong heat reflection, as well as high thermal conductivity, and the catalyst temperature is 150°C to 900°C, which is optimal for catalytic action.
I exceeded the limit, and I lost my money to Shirokane. This method has the drawback of causing a sintering phenomenon in which catalyst particles such as palladium bond to each other and the purification rate rapidly decreases. The present invention focuses on this point and aims to eliminate the above-mentioned drawbacks and provide a combustion appliance which has an extremely simple structure and which can always perform optimal catalytic action.

Next, a preferred embodiment of the combustion apparatus according to the invention shown in the drawings will be described.

Reference numeral 1 denotes a core guide tube consisting of an inner core tube 2 and an outer core tube 3. A fuel wick 4 that can move up and down is provided between the two tubes 2 and 3, and a fuel core 4 is provided on the outer periphery of the outer core tube 3. A dish-shaped guide plate 6 having a plurality of through holes 5 in its widening rising part
is provided.

Reference numeral 7 denotes a double-tube type combustion tube that is detachably placed on the core guide tube 1, and has a large number of small holes 8 all around the lower part, and a small hole 9 with a larger diameter than the small holes 8 in the upper part. A bored inner cylinder 10 is provided at a position facing the outer lower part of the inner cylinder 10 with a gap therebetween, and a small hole 11 is bored in the lower part that is at least 1/3 of the total length of the lower part, and a small hole 11 is bored in the remaining upper part. The middle cylinder 13 is horizontally elongated and has a small hole 12 formed in a staggered brick shape while partially overlapping each other vertically. An outer cylinder 15 having a plurality of air holes 14 on the upper and lower sides, and a heat-resistant heat-transmitting material whose lower end is placed on the upper end of the outer cylinder 15 and exposes the upper part of the inner cylinder 10 and the upper part of the middle cylinder 13 to the outside. A transparent cylinder 16 consisting of a transparent cylinder 16 and an upper plate 1 with the upper part of the inner cylinder 10 closed.
The transparent cylinder 16 has a central portion fixed to the transparent cylinder 7, and has a plurality of elongated hole-shaped exhaust ports 18 on its upper surface, and a lid 19 that supports the upper end of the transparent cylinder 16.

Reference numeral 20 denotes a catalyst cylinder made of stainless steel that is placed on the lid 19 at the top of the combustion cylinder 7 and communicates with the inside of the combustion cylinder 7 through the exhaust port 18.The opening 21 at the top end has a function for purifying and deodorizing harmful gases. A hollow catalyst chamber 23 is formed with an appropriate distance between the catalyst body 22 and the upper end of the combustion cylinder 7, and an elongated communication hole 24 is formed on the entire circumference of the circumferential wall.
Multiple pieces are formed in tiers. Further, both the inner and outer walls of the catalyst cylinder 20 are formed into finely uneven surfaces 2 with an average roughness of 0.12 to 1.6μ by paper polishing, belt polishing, grinder grinding, machining, sand blasting, etc.
5, which reduces heat reflection and widens the surface area to increase the amount of heat dissipation and reduce thermal conductivity.

Reference numeral 26 denotes locking pieces formed at three locations at the lower end of the catalyst cylinder 20, which are inserted into locking holes 27 provided at the same positions in the lid 19 at the top of the combustion cylinder 7 to lock the catalyst cylinder 20.
is fixed on the combustion tube 7.

Divider plates 28 are provided at appropriate locations within the inner cylinder 10 to diffuse combustion air.

Next, the operation of this embodiment of the invention will be explained.

If combustion is carried out with the catalyst tube 20 placed on the combustion tube 7, the inside. The combustion between the middle cylinders 10 and 13 heats the upper part of the inner cylinder 10 and the upper part of the middle cylinder 13, respectively.
The red-hot state is exposed to the outside through the transparent tube 16 to provide good radiant heating, while the inner/middle tube 1
0,13 The combustion exhaust gas that has heated the upper part flows into the catalyst cylinder 20 from the exhaust port 18 of the upper lid body 19, heads toward the upper end opening 21, and contacts the catalyst body 22 here. Due to the exhaust gas flowing into the catalyst chamber 23 of the cylinder 20, the inner wall surface of the catalyst cylinder 20 reflects heat inside the catalyst chamber 23, but since a plurality of communication holes 24 are formed in the catalyst cylinder 20, ,
A part of the reflected heat is emitted outward from the communication hole 24,
At the same time, the exhaust gas draft causes outside air to flow into the catalyst chamber 23 and mix with the exhaust gas to lower the temperature of the exhaust gas.Furthermore, the inner wall surface of the catalyst cylinder 20 has a fine uneven surface 25 that reduces thermal conductivity. Because of the uneven reflection, the heat reflection is reduced and the temperature inside the catalyst chamber 23 does not rise, and the catalyst cylinder 20 has a large surface area due to the formation of the uneven surface 25, which improves the absorption and radiation of exhaust gas heat. As a result, the temperature of the exhaust gas is lowered and the thermal conductivity is reduced, and the sintering phenomenon caused by the high temperature heating of the catalyst body 22 is reliably prevented, and good catalytic action is always maintained. Therefore, the exhaust gas after passing through the catalyst body 22 is purified of harmful components, deodorized, and discharged to the outside, so that a comfortable combustion that is always safe and free of bad odors can be obtained.

Furthermore, by forming the uneven surface 25 on the outer wall surface of the catalyst cylinder 20 as in this embodiment, the heat radiation area that contacts the cold air outside and radiates heat is increased, and the catalyst body 22 is heated to a high temperature with better heat radiation. This can be strongly prevented.

In short, this invention connects catalyst cylinders 20 equipped with catalyst bodies 22 at an appropriate distance above the combustion cylinder 7, and forms a plurality of communication holes 24 in the catalyst cylinders 20, and at least the inner wall surface Since it has a finely uneven surface 25 that reduces heat reflection and thermal conductivity, it is possible to reduce the exhaust gas temperature by allowing outside air to flow into the catalyst cylinder, and also to reduce heat reflection and thermal conductivity. It is possible to reliably reduce the temperature of the catalyst body without causing the sintering phenomenon when the temperature of the catalyst body exceeds the optimum temperature for catalytic action as in the past. This prevents abnormal heating and ensures optimal catalytic action at all times.

[Brief explanation of the drawing]

FIG. 1 is a half-longitudinal cross-sectional view showing one embodiment of this invented combustion appliance, and FIG. 2 is an enlarged view of section A in FIG. 1. 7... Combustion tube, 20... Catalyst tube, 22... Catalyst body, 25... Uneven surface.

Claims (1)

[Scope of utility model registration request] The catalyst body 2 is placed at an appropriate distance above the combustion tube 7.
2, a plurality of communication holes 24 are formed in the catalyst cylinder 20, and a fine uneven surface 25 is formed on at least the inner wall surface to reduce heat reflection and thermal conductivity. A combustion appliance characterized by: