JPH0129399Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a catalytic combustor equipped with a plate that heats other objects.

Catalytic combustion occurs simply by bringing a catalyst such as platinum or palladium into contact with a volatile fuel such as alcohol, benzene, or liquefied gas in the air, and the combustion time can be maintained for a long time, so low-temperature heating is possible. It is being used for burners, heat-retaining combustors, portable combustors, etc.

The simplest structure for heating other objects using this catalytic combustion is to attach a lid member to the main body that houses the volatile fuel, and attach the bottom of the heating plate to the heat dissipation hole bored in the lid member. A catalyst member is installed in the main body so that the fuel inside the main body passes through the catalyst member and flows out from the heat radiation hole, so that when the fuel passes through the catalyst member, it comes into contact with the catalyst and combustion occurs.

However, if the catalyst member and the heating plate are in contact with each other, the temperature at the center of the heating plate located directly above the catalyst member becomes higher than the temperature around the heating plate, and the heating plate is heated to a uniform temperature. becomes difficult to do. In addition, the supply of air to the combustion gas is small, which not only reduces fuel efficiency but also tends to generate a large amount of unburned gas, which sometimes pollutes the indoor air. In addition, if the catalyst member is installed close to the fuel in the main body, the position at which the evaporated combustion is taken in will be lower, and the intake and volatilization of the fuel directly under the catalyst member will progress more than in other parts, resulting in increased fuel consumption. This caused problems such as fuel remaining around the main body and making it difficult to volatilize the fuel uniformly.

This invention was devised in order to eliminate the above-mentioned drawbacks, further improve the combustion effect, and obtain a catalytic combustor with good fuel consumption and extremely low generation of unburned gas. A container-shaped main body with an open top and containing volatile fuel inside, a lid member that covers the main body and has a heat radiation hole of a required size in the center, and a catalyst installed under the heat radiation hole. The catalyst device has a lattice-shaped catalyst member in a frame, and a heating plate provided above the frame with a required combustion gas circulation space, and the catalyst device is installed in the vessel. and the fuel is provided below the heat dissipation hole with sufficient volatilization space between the fuel and the fuel.
A gap for gas outflow is provided around the heating plate.

This invention will be explained in detail below using illustrated examples.

1 is a container-shaped main body with an open top and air holes 2, 2 on the sides. Reference numeral 3 denotes a lid member that fits into the opening edge of the main body 1, and has a rectangular heat dissipation hole 4 bored in the center, and grooves 5, 5 communicating with the air holes 2, 2 on the opening edge. It is provided. Furthermore, support pins 7, 7 for the catalyst device 6 are provided protruding from the inside of the lid member 3.

The catalyst device 6 includes a frame member 8 made of ceramic, a lattice-shaped catalyst member 9 fitted into the frame member 8, a shielding plate 10, and a heating plate 11.
It is composed of.

The frame member 8 is formed into a rectangle slightly larger than the heat dissipation hole 4, has grooves on the upper surface that form a plurality of combustion gas circulation spaces 12 both inside and outside, and has a step portion on the inside lower side that receives the catalyst 9. It has 8a. The center portion of the lower surface is formed to protrude downward, and the shielding plate 10 is fitted around the protrusion 8b.
The shielding plate 10 and the frame member 8 are integrally joined by means such as adhesion or caulking.

The heating plate 11 is made of a metal plate or a wire mesh having a large number of small holes formed over its entire surface, and its periphery is caulked to the upper side surface of the frame member 8.

The shielding plate 10 is formed in a size that contacts the step portions 3a, 3a formed inside the opening edge of the lid member 3, and has mounting holes at the positions of the support pins 7, 7. It is fixed to the lid member side by caulking the tip of the support pin inserted into the container, and is installed inside the container.
The interior of the vessel is divided into upper and lower sections and is airtightly sealed off.

The catalyst device 6 is fixed to the lid member side by the shielding plate 10 directly below the heat radiation hole 4 and above the gel-like volatile fuel 13 in the main body with a sufficient volatilization space 14. Ru. Furthermore, a gap 15 is provided between the heat radiation hole 4 and the periphery of the heating plate 11 to allow the gas to flow out after coming into contact with the heating plate 11. passes through the catalyst device 6 through the shielding plate 10, comes into contact with the catalyst member 9, causes an oxidation reaction, and heats the heating plate 11.

In this case, since there is a circulation space 12 between the frame member 8 and the heating plate 11, a part of the combustion gas that hits the center of the heating plate 11 flows in the side direction along the heating plate 11, and is heated. It heats not only the central part of the plate but also the periphery thereof, and flows out through the gap 15 to the outside. Therefore, the temperature of the heating plate 11 is equalized, and the mat impregnated with insecticide, fragrance, etc. placed on the heating plate is evenly heated.

Furthermore, since there is a space 14 between the catalyst device 6 and the fuel 13, the volatilized fuel can be taken in easily, and partial depletion of the fuel can be prevented.

As described above, this idea includes placing the circulation space 12 in the upper part of the frame member 8, providing the heating plate 11, and installing the catalytic device 6 through a shielding plate that airtightly shuts off the top and bottom of the vessel. Since a sufficient volatilization space 14 is provided between the fuel 13 in the heating plate 1 and a gap 15 for gas outflow is provided around the heating plate, the temperature of the heating plate can be raised evenly by the combustion gas. Since all of the volatile fuel passes through the catalyst device, combustion efficiency is high and unburned gas is less likely to be produced. Furthermore, since there is little fuel loss, the combustion time is longer, and combustion can be continued for a long time.

[Brief explanation of drawings]

The drawings show an embodiment of the catalytic combustor of this invention, with FIG. 1 being a longitudinal sectional view and FIG. 2 being a partially cutaway plan view. 1... Main body, 3... Lid member, 4... Heat radiation hole, 6
...shielding device, 8 ... frame member, 9 ... catalyst member,
10... Shielding plate, 11... Heating plate, 12... Distribution space, 13... Fuel, 14... Volatilization space, 15...
…gap.

Claims (1)

[Scope of utility model registration request] A container-shaped main body with an open top and containing volatile fuel inside, a lid member that covers the main body and has a heat radiation hole of a required size in the center, and a catalyst installed under the heat radiation hole. The catalyst device has a lattice-shaped catalyst member in a frame, and a heating plate provided above the frame with a required combustion gas circulation space, and the catalyst device is installed in the vessel. a catalyst, which is disposed through the shielding plate, is disposed below the heat dissipation hole with sufficient volatilization space between it and the fuel, and is provided with a gap for gas outflow around the heating plate; type combustor.