JPH0830588B2 - Burning appliances - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an indoor exhaust type combustion instrument used for heating, heating and the like.

Conventional technology Oil and gas are used as fuel and heated by the heat of combustion,
Many heating appliances have been put into practical use. Particularly, as a device for extracting and utilizing a part of combustion heat as radiant heat, as represented by a reflection type oil stove, the combustion heat is converted into radiant heat in the combustion chamber, and heat from a wall of the combustion chamber to a glass window or the like. It was released to the surroundings through the permeate.

In the conventional combustion device of this type, the amount of heat that can be taken out as radiant heat from the combustion chamber is about 30% of the total combustion heat, and more than half of the heat is emitted together with the exhaust gas. For this reason, not only when it is used outdoors, but also when this combustion device is used indoors, the heat released together with the exhaust gas heats the space near the ceiling, but does not contribute to the heating effect on the human body. However, only about 30% of the combustion heat extracted as radiant heat is used for actual heating, and the utilization efficiency of combustion heat was low.

Further, in order to solve this problem, a combustion appliance having a structure in which a heat radiator for converting exhaust heat into radiant heat is placed on the upper part of the combustion chamber has been devised. In this case, 40% of the combustion heat is converted to radiant heat, but 60% is still heating the ceiling as exhaust heat.

However, in such a conventional example, part of the heat of the heat radiator goes directly from the front opening direction toward the human body,
The radiant heat to the rear is reflected forward by the heat reflector. Part of this rearward radiant heat is absorbed by this heat reflection plate, so that rearward radiant heat is partially wasted. Especially,
Mutual radiation between the rear surface of the heat radiator and the heat reflection plate heats the heat reflection plate, and convective heat is generated from this or waste heat is generated by heating the rear exterior.

The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to provide a combustion device that more efficiently recovers heat discharged together with exhaust gas and converts it into radiant heat to enable effective use of combustion heat. And

Means for Solving the Problems A combustion instrument according to the present invention includes a vertically arranged cylindrical combustion heat radiator having a combustion portion and being heated by combustion heat of the combustion portion, and a combustion heat radiator of the combustion heat radiator. A combustion exhaust port provided in an upper part, an exhaust regulation plate provided substantially horizontally above the combustion exhaust port with a space therebetween, and suspended substantially vertically from the exhaust regulation plate in front of the combustion heat radiator. An exhaust heat radiator whose lower end is located above the combustion heat radiator, a plurality of communication holes for passing exhaust gas provided in the exhaust heat radiator, and the combustion heat behind the combustion heat radiator. A heat reflection plate provided substantially vertically between the lower end of the radiator and the exhaust control plate, and a lower end portion located between the exhaust heat radiator and the heat reflection plate is located above the combustion heat radiator. Suspended almost vertically from the exhaust control plate The exhaust heat reflection plate is lowered.

Action In the combustion device of the present invention having the above-described configuration, the combustion heat radiating body is heated as the first stage of the combustion in the combustion section.
The heat radiated to the front of the combustion heat radiator and the heat radiated to the rear of the combustion heat radiator and reflected by the heat reflection plate are directed to the front of the appliance. As a second step, the hot exhaust gas rising from the exhaust port provided above the combustion heat radiator heats the exhaust heat radiator. The heated exhaust heat radiator radiates heat forward and backward. The heat radiated to the front is radiated to the front of the device. A part of the heat radiated rearward is again reflected forward by the exhaust heat reflection plate, but the rest is absorbed by the exhaust heat reflection plate and heats the exhaust heat reflection plate. Further, since the exhaust heat reflection plate is also heated by the high temperature exhaust gas, it becomes even hotter. Therefore,
The exhaust heat reflection plate itself also radiates heat forward and backward. Part of the heat radiated to the front heats the exhaust heat radiator, and the other radiates directly to the front of the instrument. A part of the exhaust heat of the heated exhaust heat radiator is further radiated to the front of the device. The remaining heat radiated rearward is reflected forward by the heat reflection plate and heads toward the front of the device.

As described above, according to the present invention, the combustion heat and the exhaust heat are effectively concentrated in the forward direction, so that the utilization efficiency for heating and heating can be significantly increased.

Embodiment An embodiment of the present invention will be described below with reference to the accompanying drawings.
1, 2, and 3 are a top view, a front view, and a horizontal sectional view, respectively, of an embodiment of the present invention. In the figure, 1 is a box of a combustion instrument, 2 is a combustion tube which is a combustion heat radiator arranged inside the box 1, and the rear surface of the combustion tube 2 is surrounded by a heat reflection plate 3. The middle and upper parts of the combustion tube 2 are wrapped with a heat permeable material 4 as shown in FIG. An exhaust heat reflection plate 5 is provided above the combustion cylinder 2, an upper end is closed by an exhaust control plate 6, and an exhaust heat radiator 7 having a large number of communication holes 7'is provided on the front face. . At the time of combustion, first, the fuel burns in the combustion cylinder 2, and the wall surface of the combustion cylinder 2 is heated by a part of the combustion heat. The heat radiated from the heated wall surface is the heat permeable material 4
Radiated heat from the front surface directly and from the rear surface is reflected by the heat reflection plate 3, and both are used for front heating and heating. On the other hand, the high-temperature exhaust gas that is discharged from the exhaust port at the upper part of the combustion tube 2 and rises is heat-exchanged here while passing through the communication hole 7 ′ of the exhaust heat radiator 7 and is discharged. The heat recovered by the exhaust heat radiator 7 is emitted again from here, but the heat is directly radiated to the front side of the portion facing the front surface of the exhaust heat radiator 7, and the rear surface of the exhaust heat radiator 7 is discharged. And the heat radiation from the side surface is reflected forward by the exhaust heat reflection plate 5 and can be used for heating and heating. Further, the combustion heat can be effectively used as the radiant heat together with the radiant heat emitted from the heat permeable material 4.

Here, the exhaust heat reflection plate 5 is in a state where it partially absorbs the radiant heat of the exhaust heat radiator 7 and is also heated by the exhaust gas. Therefore, the exhaust heat reflection plate 5 also radiates its own heat to the rear. The exhaust heat reflection plate 5 and the rear radiant heat of the combustion cylinder 2 are reflected forward by the heat reflection plate 3. In the conventional example, due to mutual radiation between the rear surface of the exhaust heat radiator and the heat reflection plate, the heat reflection plate overheats, and convective heat is generated from here.
Alternatively, it was wasted heat such as heating the exterior of the rear part.

In the present invention, the exhaust heat reflection plate 5 is interposed between the conventional exhaust heat radiator 7 and the heat reflection plate 3 at an appropriate interval to prevent the heat reflection plate 3 from rising in temperature and improve the radiation efficiency.

Here, the exhaust heat radiator 7 guides passage of high-temperature exhaust gas by opening a large number of communication holes 7 ′, recovers heat, and radiates heat from the exhaust heat radiator 7. As shown in the drawing, the shape may be curved according to the combustion cylinder 2, or may be simply a flat plate shape. In front of the combustion tube 2, it is suspended almost vertically from the exhaust control plate 6,
It is sufficient that the lower end has a portion located above the combustion cylinder 2. A honeycomb-shaped, cut-and-raised hole-shaped substantially vertical plate that is small in resistance to the flow of exhaust gas and has a large heat recovery and heat radiation area is suitable. Further, the exhaust heat reflection plate 5 may have a shape other than a semi-cylindrical shape or a semi-elliptical cylinder, a rectangular shape or the like, or a part thereof may be shared with the box body 1 or the heat reflection plate 3.

Further, as the material of the exhaust heat radiator 7, a metal such as stainless steel or copper may be used as it is, but in order to increase the emissivity, the surface thereof is coated with a metal oxide such as alumina, titanium oxide or manganese dioxide. It is also possible to provide layers, whereby the surface emissivity is significantly improved and the radiation performance is excellent. On the other hand, the material itself of the radiator 7 can be a ceramic material having a high emissivity, and for example, the high emissivity of a ceramic containing silica / alumina as a main component can be effectively utilized to further increase the amount of radiant heat. You can

The material of the exhaust heat reflection plate 5 is preferably a metal such as stainless steel, or a heat resistant material such as holo, but a heat permeable material such as glass is not preferable.

Further, in the case where the exhaust control plate 6 provided between the heat reflection plate 3 and the exhaust heat reflection plate 5 is provided with the opening 8 between the heat reflection plate 3 and the exhaust heat reflection plate 5, Since hot air rises from the opening 8, heating of the heat reflection plate 3 is prevented,
With this structure, the temperature of the rear surface of the main body is further prevented from increasing, and the safety is increased.

Further, the exhaust heat reflection plate 5 may be provided with the opening 9 to allow a part of the radiant heat of the heat radiator 7 to pass therethrough and be reflected from the heat reflection plate. It is convenient to heat the kettle by raising it above the plate 6.

In this case as well, the basic effect is not impaired, so that the opening 9 must have a smaller area than the large number of communication holes 7'provided in the exhaust heat radiator 7.

Further, the heat reflection plate 3 and the exhaust heat reflection plate 5 are curved,
When the curvature of the heat reflection plate 3 is larger than that of the exhaust heat reflection plate 5 and the center of the curvature is forward, the mutual reflection between the exhaust heat reflection plate 5 and the heat reflection plate 3 decreases, and the heat reflection plate 5 The heat radiation to the rear of the is effectively concentrated toward the front.

Further, as shown in FIG. 4, the communication hole 7'of the exhaust heat radiator 7 preferably has a projection aperture ratio from the lower front side smaller than the projected aperture ratio from the front upper side. When using such a thermal radiant heater indoors, the front floor surface is
This is because radiant heat causes problems such as discoloration. With such a configuration, the radiant heat mainly goes upward, and is effective for heating the human body. Further, the communication holes having such a shape can be freely selected according to the application, such as a diagonally cut ceramic honeycomb (Fig. 4a), a metal having diagonally cut and raised holes (Fig. 4b), or the like. Good.

Further, it is also possible to carry an exhaust gas purification oxidation catalyst on the exhaust heat radiator 7 to obtain the effect of purifying carbon monoxide in the combustion exhaust gas.

As described above, according to the present invention, an exhaust heat radiator and an exhaust heat reflector are provided above the combustion chamber, and at least the exhaust heat radiator is a heat radiator having a large number of communication holes. By doing so, when the exhaust gas passes through the communication holes, the heat released together with the exhaust gas is recovered as radiant heat and the radiant heat radiated rearward and the remaining exhaust heat are also effectively recovered by the exhaust heat reflection plate. Moreover, a large amount of radiant heat can be supplied to the front surface, and the efficiency of utilization of combustion heat for heating and heating can be significantly increased.

[Brief description of drawings]

FIG. 1 is a top external view of a combustion device according to an embodiment of the present invention, FIG. 2 is a front external view of the same embodiment, FIG. 3 is a horizontal sectional view of the same embodiment, and FIG. FIG. 7 is a vertical sectional view of another embodiment of the exhaust heat heating body. 1 ... Box, 2 ... Combustion tube, 3 ... Heat reflector, 5 ... Exhaust heat reflector, 7 ... Exhaust heat radiator.

Claims (3)

[Claims] 1. A vertically-arranged cylindrical combustion heat radiator that has a combustion portion and is heated by the combustion heat of the combustion portion, and a combustion exhaust port provided above the combustion heat radiator. An exhaust gas regulating plate which is provided substantially horizontally above the combustion exhaust port via a space, and is suspended substantially vertically from the exhaust gas regulating plate in front of the combustion heat radiating body, and a lower end thereof is the combustion heat radiating body. An exhaust heat radiator positioned higher, and a plurality of communication holes for passing exhaust gas provided in the exhaust heat radiator,
A heat reflection plate provided substantially vertically between the exhaust heat regulation plate and the lower end of the combustion heat radiation body behind the combustion heat radiation body, and the lower end portion between the exhaust heat radiation body and the heat reflection plate is An exhaust heat reflection plate suspended substantially vertically from the exhaust regulation plate so as to be located above the combustion heat radiator. 2. The combustion instrument according to claim 1, wherein the surface of the exhaust heat radiator is made of a metal oxide. 3. The combustion instrument according to claim 1, wherein the exhaust heat radiator carries an oxidation catalyst.