JPH0443209A - Heater device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Industrial field of application The present invention relates to a heat generating device used for space heating, hot water supply, drying, etc. 4. Prior art Conventional heat generating device There are coiled wires as well as those that are built into metal tubes, quartz tubes, ceramic tubes, etc.Also, heating devices such as ceramic heaters that contain electrical resistors in ceramics. Forcibly blowing air from a fan to generate warm air, installing a reflector behind the heat generating device to perform radiant heating, etc.α Heat conduction, convection, and radiation to heat the object with the heat generating device. There is.

In addition, conventional catalytic combustion devices use a honeycomb-shaped catalyst body, which is preheated by an electric heater or a pilot burner to raise the temperature to the activation temperature, and then combustion gas is supplied to the catalyst and combusts by catalytic action. The composition is
Problems to be Solved by the Invention Conventional heat generating devices like this have the following problems: For example, when heating with an electric stove, it heats the air in the room and also eliminates cigarette smoke floating in the room. This will also heat up the odors in the room.

General Details The higher the temperature, the stronger the odor is perceived by the human nose. In other words, when there is an odor or harmful gas in the surrounding area 4Q When heating with the conventional heating device described above, it not only heats the object to be heated, but also generates a large amount of force (because it also heats the odor and harmful gas at the same time). However, the problem with the conventional catalytic combustion device is that the odor becomes stronger, but the conventional catalytic combustion device C has the advantages of being able to burn fuel without flames and producing clean exhaust gas.The catalyst preheating section and the catalyst body are separated. Most of the heat generated from the preheating section is used to heat the catalyst by indirect heat transfer from the gas flowing into the catalyst. Although the present invention has problems such as the need to heat the honeycomb-shaped ceramic body of the base material, which requires a long time for preheating, and the lower limit of the amount of fuel that can be burned, the present invention overcomes the above-mentioned prior art. The purpose is to remove odors and harmful gases that are difficult to solve in the catalytic converter, shorten the preheating time during catalyst combustion, and expand the combustion range.

Means for Solving the Problems The present invention solves the above problems by providing a heat generating device,
Double tubular structure: an inner tubular body containing an electrical resistor, an outer tubular body installed around the outside of the inner tubular body through a space, and a supply means for supplying air or combustion gas to the space between the two tubular bodies. and a catalyst coating layer is provided on the outer surface of the inner tubular body and/or the inner surface of the outer tubular body. Because the catalyst coating layer is provided on the surface of the heating device, when it heats the circulating gas, it also heats the catalyst coating layer. Even if the air C is heated to the activation temperature of the catalyst over time, it still contains odor components.
When it comes into contact with the catalyst coating layer heated by the electric resistor and heated above the activation temperature, it is quickly oxidized and purified by the catalytic action, odor components are removed, and it is released from the heat generating device. When a combustion gas consisting of air is introduced, the catalyst coating layer +Q, which is similarly heated to the activation temperature or higher by an electric resistor, comes into contact with the combustion gas that has been preheated indirectly via the catalyst coating layer ζ Although the fuel burns quickly due to catalytic action and the preheating time can be greatly shortened, when there is little fuel to burn, in the conventional catalytic combustion device, the combustion heat generated by combustion maintains the catalyst above the activation temperature. However, if the catalyst temperature is maintained, a large amount of electricity and calorific value are required. According to the present invention, the heat generated by the electrical resistor is very efficiently covered by the catalyst. Atsushi conveyed to the layers
By applying a small amount of current to the electrical resistor, the catalyst coating layer can be maintained at a temperature higher than the activation temperature at all times, and even a small amount of fuel can be easily and stably combusted.

EXAMPLE Hereinafter, an example of the present invention will be described based on the accompanying drawings.
). In Figure 1, 1 is a catalyst coating layer, 2 is an inner tubular body, 3 is an outer tubular body, 4 is an electric resistance bar, and 5 is a fan, which is a catalyst coating layer 1 (composed of alumina and a platinum group catalyst with a large specific surface area). In addition, it is desirable to add barium oxide to lanthanum oxide and cerium oxide in order to prevent a decrease in the specific surface area of the alumina Q at high temperatures.Furthermore, the coating layer of the present invention includes nickel oxide, iron oxide, cobalt oxide, titania, zirconia, By adding a metal oxide selected from the group of magnesia and chromium oxide, it is possible to further increase the far-infrared radiation efficiency.In this example, a catalyst coating layer was formed on the outer tubular inner surface and the inner tubular outer surface. (Although the deodorizing effect can be obtained even if formed on either surface, the most desirable configuration (good) from the viewpoint of deodorizing properties)
This is a configuration in which a catalyst coating layer is formed on both the outer tubular body surface and the inner tubular exterior surface as shown in FIG. 2 and the outer tubular body 3 can be made of metal tubes, ceramics, quartz statues, glass tubes, etc. However, in the case of metal tubes, there is a large difference in thermal expansion with the catalyst coating layer. Adhesion can be improved by using a metal tube whose surface is oxidized to form a metal oxide film. A quartz tube is most desirable because it provides sufficient adhesion with the coating layer - and the shape of the tubular body is not limited to a straight tube; a curved tube may also be used. % Electrical resistor 4 (Metal wire such as nichrome wire, Kanthal wire, tungsten wire, etc.) is coiled and sealed in an air atmosphere or in a vacuum or rare gas, or when a metal tube is used, the electrical resistance is increased along with the insulating material. When the electrical resistor 4 is energized with the body enclosed in a metal tube, hot rays are emitted from the electrical resistor 4 in the entire circumferential direction of the electrical resistor 4. Since the outer surface of the built-in inner tubular body 2 and the inner surface of the outer tubular body 3 are coated and installed, the heat rays radiated from the electrical resistor 4 in the entire circumferential direction are radiated to the catalyst coating layer 1. Radiant heating and heat transfer heating are performed, and the catalyst coating layer 1 is heated to the active temperature in a short time and becomes high temperature. The air containing odor components sent into the space where the odor component is heated is also heated, and the odor force in this air (contacts with or diffuses into the catalyst coating layer 1 heated to the activation temperature, and is quickly oxidized and purified by its catalytic action. Therefore, if the atmosphere in which the heating device is placed contains odors such as cigarette smoke or harmful gases, they will be purified during heating and a comfortable heating environment can be created. When a combustion gas consisting of fuel and combustion air is introduced by a fan 5 into the catalyst coating layer 1 which has been heated to a temperature higher than the oxidation temperature, the combustion gas which has been preheated indirectly through the catalyst coating layer 1 comes into contact with the fuel. The catalyst coating layer 1 (Table 1) is formed as a thin layer in close contact with the outer surface of the inner tubular body containing the electrical resistor 4 and the inner surface of the outer tubular body. This is done smoothly by heat transfer and radiation from the electrical resistor 4 to the catalyst coating layer 1, and heating to the activation temperature is possible immediately after electricity is applied to the electrical resistor 4. Preheating time can be greatly shortened. When fuel is low, the catalyst coating layer 1 cannot be maintained above the activation temperature as it is, but by supplying a small amount of current to the electric resistor 4, the catalyst coating layer 1 can always be maintained above the activation temperature. Even a small amount of fuel can be easily and stably combusted.

FIG. 2 shows another embodiment of the heating device of the present invention.

6 is a catalyst coating layer, 7 and 8 are quartz tubes, 9 is an electric resistor IO
11 is a heat reflecting plate, 11 is a safety device, and 12 is a heat generating device exterior. When a switch (not shown) is turned on, the electric resistor 9 generates heat, which heats and activates the catalyst coating layer 6. However, a delay device such as a timer activates the catalyst. A blower (not shown) is activated in time with the activation of the coating layer 6 to supply air between the quartz tubes 7 and 8, which are tubular bodies. 'Odor components contained in the air are decomposed and purified by the activated catalyst coating layer 6. The odorless air contributes to heating as warm air, and along with it the electric resistor 9
The heat generated by the catalyst coating layer 6 due to the heat from the catalyst and the heat generated by the catalyst coating layer 6 due to the catalytic reaction (mostly radiated as infrared rays from the catalyst coating layer 6 and the quartz tubes 7 and 8. The infrared rays radiated upward in FIG. With the infrared rays reflected downward in Figure 2 and radiated downward, an object to be heated (such as a human being, not shown) placed in the lower part of Figure 2 can be efficiently radiated and heated. This device is provided so that the object to be heated does not come into direct contact with the quartz tube 7. Therefore, with this device, a feeling of heating can be quickly obtained in a comfortable atmosphere without bad odor.

Effects of the Invention As described above, according to the present invention, odors such as cigarette smoke and harmful gases in the atmosphere in which the heating device is placed are removed by catalytic action.For this reason, when using the heating device, can provide a comfortable heating environment.

Furthermore, it is possible to obtain a catalytic combustion device that can easily and stably burn even a small amount of fuel and has a significantly shortened preheating time.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a heat generating device according to one embodiment of the present invention. FIG. 2 is a cross-sectional view of a heat generating device according to a different embodiment of the present invention. 1.Catalyst coating layer 2.Inner tubular body 3.Outer tubular body 4
...Electric resistor 5..Fan, 6..Catalyst coating layer,
7゜8...Quartz statue 9...Electric resistor 10...Heat reflecting plate, 11...Safety 1, 12...Name of storm agent outside the heating device Patent attorney Shigetaka Awano and 1 other person Hehe

Claims (2)

[Claims] (1) It has a double tubular structure, with an inner tubular body containing an electrical resistor, an outer tubular body installed around the outside of the inner tubular body with a space between them, and air or combustion gas in the space between the two tubular bodies. A heat generating device comprising a supply means for supplying a catalyst, and a catalyst coating layer provided on at least one of the outer surface of the inner tubular body and the inner surface of the outer tubular body. (2) The heat generating device according to claim 1, wherein the inner tubular body is a quartz tube.