JPH0113229Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a heat generating device that burns vaporized gas of liquid fuel or gaseous fuel.

In general, the method of burning liquid fuel is to suck it up using a "core" made of bundles or fabrics of cellulose such as cotton, glass wool, or asbestos, and then bring a separate ignition source close to the tip of the core material. A method in which a portion of the fuel is vaporized and burned, and the resulting heat is used to vaporize the fuel one after another to continue combustion, or a method in which the fuel is ejected in the form of a spray and a separate ignition is provided. There are combustion methods that produce a combustion flame with a large calorific value by igniting the combustion flame from a source. On the other hand, gaseous fuels are guided through pipes or ducts, and once ignited by an ignition source at the optimum mixing ratio with air, a combustion method is used in which a continuous combustion flame is obtained. .

However, although the above-mentioned combustion method is suitable for large-sized devices such as combustion devices that can generate a relatively large amount of heat, it requires an ignition source and generates flame, which can lead to a fire. There are many disadvantages such as a large risk of combustion, and it is not suitable for heat generating devices that continuously obtain a minute amount of heat over a long period of time through complete combustion. In addition to having drawbacks, there was nothing that could burn fuel efficiently.

Therefore, in view of the above, the present inventor has already proposed a heat generating device that is small and lightweight and can safely generate a small amount of heat over a long period of time, but this proposal aims to bring about a heat generating device with even higher efficiency. It is something.

Hereinafter, the present invention and examples will be specifically explained in detail with reference to figures.

FIG. 1 is a vertical cross-sectional view showing a schematic diagram of the device of the present invention, and 1 is a tank for storing fuel 2. Types of fuel 2 include liquid fuels such as alcohol ether and volatile oil, and gels of these fuels. In addition to solid fuels, gaseous fuels such as methane, ethane, propane, and butane are used. 3 is a porous plate made of porous ceramic with an average pore diameter of about 100 μm, or made of asbestos, glass wool, carbon fiber, etc., assembled with a small amount of adhesive and formed into a predetermined shape. Depending on the type of fuel to be used, that is, the properties, fuels with the optimum average pore diameter are used. 4 is a ceramic porous body, which has triangular, square,
Any material with relatively low flow resistance may be used, such as a honeycomb structure with a large number of hexagonal holes arranged in a row, or a three-dimensional network with a large number of irregularly shaped communicating holes. The porous body contains platinum, a component that has an oxidation catalytic effect.
Approximately 0.5 to 5 g of platinum group metals such as Pt, palladium Pd, and rhodium Rh are supported per volume, and the porous ceramic body 4 is placed on the porous plate 3 described above. The porous plate 3
A notch 4a is provided along the entire circumference so that a space S is formed between the top surface and the top surface. Note that 3a is a suction body for sucking up the fuel 2.

The operation of the heat generating device of the present invention having the basic structure as described above will be explained next. The fuel 2 stored in the tank 1 is sucked up by the suction body 3a and vaporized by the porous plate 3, or the fuel 2 vaporized in the tank 1 passes through the micropores of the porous plate 3. It is released upward as vaporized fuel. The fuel released from the porous plate 3 in this manner immediately flows into the through hole in the central part of the porous ceramic body 4 that is in contact with the porous plate 3, and is carried by the porous ceramic body 4. Subjected to oxidative combustion by the action of platinum group metals. Further, the vaporized fuel discharged into the space S by the notch 4a mixes with the air existing in the space S, and then flows into the through hole opened in the space S of the ceramic porous body 4, and the supported platinum group The metal catalyzes oxidation and combustion, generating heat. Therefore, when a heating plate (not shown) is installed above the ceramic porous body 4,
If, for example, an insecticide, an aromatic agent, etc. are placed on the heating plate as objects to be heated, these chemical components can be heated and volatilized.

In the heat generating device according to the present invention that operates in this manner, fuel from the tank 1 is supplied through the porous plate 3, but in this case, air is supplied in the space S and is sent to the ceramic porous body 4 together with the vaporized fuel. Therefore, the oxidative combustion reaction takes place in the ceramic porous body 4 in the presence of sufficient oxygen, resulting in highly efficient combustion without temperature uniformity. Note that if a rotatable or removable fuel cutoff plate (not shown) is provided between the porous plate 3 and the ceramic porous body 4, the oxidation combustion reaction can be started or stopped, or the calorific value can be reduced. Can be controlled arbitrarily. The ceramic porous body 4 also has a space S through which air is taken in through a notch 4a.
However, the ceramic porous body 4 is not limited to this as shown in Fig. 2 A, B, and C.
1, 42, 43 respectively, 41a, 41b, 4
Notch grooves such as 2a, 42b, 43a, 43b,
Alternatively, by forming the openings 42c, 43c, etc., the openings 42c, 43c, etc. can be used as air intake holes to bring about better combustion and provide a heat generating device that performs highly efficient heat generating operation.

As described above, according to the present invention, by guiding the vaporized fuel from the fuel tank to the ceramic porous body supporting platinum group metal and having notches, grooves, etc., sufficient air is available for oxidative combustion. It is possible to provide a heat generating device that can supply (oxygen), achieve complete combustion with a simple structure, and is highly efficient, compact, and highly safe without temperature unevenness.

[Brief explanation of drawings]

FIG. 1 is a central vertical sectional view showing the basic configuration of a heat generating device according to an embodiment of the present invention. FIGS. 2A, 2B, and 2C are three-dimensional perspective views showing other embodiments of only ceramic porous bodies constituting the heat generating device according to the embodiment of the present invention shown in FIG. 1: Tank, 2: Fuel, 3: Porous plate, 3a:
Wicking body, 4, 41, 42, 43: Ceramic porous body, 4a, 41a, 42a, 43a: Notch.

Claims (1)

[Scope of utility model registration request] A heat generating device comprising a tank storing a fuel such as methanol or butane, and a ceramic porous body supporting a platinum group metal via a porous plate that vaporizes the fuel from the tank. A heat generating device characterized by having a notch formed therein for air circulation.