JPH0237215A - Oil heater and combustion chamber thereof - Google Patents

Abstract

PURPOSE:To make it possible to efficiently convert the potential heat of combustion gas to radiant heat by a method wherein the high temperature combustion gas is once turned into a down flow and, after that, diffused by being passed through porous heat transfer conversion elements at the front of an oil heater. CONSTITUTION:A burner, in which a cylindrical skeleton 13 is disposed in upright, is housed in a case main body 10, on the side wall 21 of which exhaust gas guide ports 19 are bored so as to connect waste heat diffusion chambers 11a and 11b to the case main body 10. The inclined plane plate 18 of the waste heat diffusion chamber 11 is fixed at an angle (alpha) to the upper edge 22 of the exhaust gas guide port 19. The radiating aperture 14, which is provided in front of the waste heat diffusion chamber, consists of porous heat transfer conversion element. Further, the waste heat diffusion chamber 11 has a vertical plate 12, the lower edge of which lies in the same level as the lower edge of the inclined plane plate 18 so as to form an exhaust gas flow passage. High temperature combustion gas flows through a notched opening, which is provided at the desired position on the back of the cylindrical skeleton 13, to the exhaust gas guide port 19 so as to form a down flow along the inclined plane plate 18 and, in succession, diffuse through the gas flow passage at the lower edge of the vertical plate out of the radiating aperture 14.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a kerosene stove and its combustion chamber that efficiently converts heat retained in combustion exhaust gas into radiant heat.

[Prior Art] Conventional combustion methods include either directly vaporizing liquid fuel and burning it, or splitting it into fine mist using a spray device and then burning it.

Commonly used oil burners are rotary burners, jet burners (steam atomization, air atomization, mechanical atomization), special burners (gun type high pressure atomization, low pressure atomization), and the like. There are also examples of a kind of ignition device in which liquid fuel is turned into foam and ignited by an electric spark (Japanese Patent Publication No. 49-42018, Japanese Patent Application Laid-Open No. 47-38368).
No., Special Publication No. 63-23445).

The present applicant previously proposed in Japanese Patent Application No. 82-307408 a combustor that continuously burns liquid fuel by foaming it, stably burning the foamed fuel, and expanding the variable range of combustion amount. We proposed a new combustion device.

[Problems to be Solved by the Invention] Conventional open-type kerosene stoves generally have a combustion chamber in which a cylindrical glass is installed above the combustion frame, and a flame stabilizer is installed within the cylinder. There is.

However, in this case, most of the high-temperature combustion exhaust gas is dissipated from above the stove while remaining high temperature, so the area near the ceiling of the room being heated becomes higher than necessary.
It has the disadvantage that it does not feel warm near the floor where the human body is.

The present invention proposes a kerosene stove and a combustion chamber thereof, which dissipates sensible heat of exhaust gas produced by foaming liquid fuel and combusting it as radiant heat. It is something.

[Means for Solving the Problems] The present invention provides a method for burning liquid fuel by foaming it,
The high-temperature combustion exhaust gas is first converted into a downward flow and then passed through a porous heat transfer element from the front of the kerosene stove to be dissipated. At this time, the sensible heat of the combustion exhaust gas is radiated as radiant heat.

Therefore, in the present invention, high-temperature exhaust gas is not radiated above the kerosene stove, but is radiated from the front surface of the stove.

A porous heat transfer element made of a foam or sintered body of ceramics, metal, etc. has a very large surface area per unit volume. Therefore, when high-temperature gas is passed through this heat transfer element, the amount of heat transferred from the exhaust gas to the element increases.

For example, when a 20 mm thick zirconia ceramic (surface area per unit volume -500 rf/rrr) is used as a heat transfer element, the gas temperature before passing through the element is 65
When gas at 0°C was passed through the device at a rate of 25 mm/s (apparent velocity), the gas temperature after passing through the element decreased to 270°C.

At this time, the amount of heat transferred to the heat transfer element was mainly radiated into the atmosphere as radiant heat.

Highly efficient radiant heating can be performed by passing exhaust gas from an kerosene heater through the porous heat transfer conversion element and converting the amount of heat held by the high-temperature exhaust gas into radiant heat.

Further, as the heat transfer conversion element, a porous ceramic body made of alumina, zirconia, mullite, etc., a sintered metal or a foam made of nickel, aluminum, copper, stainless steel, etc. are used.

Conventionally, the challenge was how to efficiently radiate the sensible heat contained in combustion exhaust gas from the front of the stove as radiant heat. Therefore, the present invention efficiently converts combustion exhaust gas into radiant heat by dissipating combustion exhaust gas from the front of the stove and passing the high-temperature exhaust gas directly through a heat transfer converter installed at the front of the stove.

The present invention will be explained below with reference to the drawings.

FIG. 1 is a plan view of the invention, FIG. 2 is a front view of the invention, FIG. 3 is a side view of the invention, and FIGS. 4 and 5 are partial perspective views of the invention.

In the present invention, a cylindrical skeleton 13 is erected in the combustor 10 and housed in the case body IO. The side wall 21 of the case body 10 is provided with an exhaust gas induction port 19, which includes an exhaust heat dissipation chamber 11a,
llb is connected to and integrated with the case body 10.

In the exhaust heat dissipation chamber 11 according to the present invention, as shown in FIG. 5, a slope plate 18 is fixed to the upper edge 22 of the exhaust gas guide port 19 at an angle α. Further, the heat dissipation chamber 11 has a heat dissipation window 14 on the front surface, and the heat dissipation window 14 is constituted by a porous heat transfer conversion element.

The exhaust heat dissipation Xtt also has a vertical plate 12, and the lower edge of the vertical plate 12 is leveled with the lower edge of the inclined plate 18 to form an exhaust gas flow path. 17 is a top plate.

In the present invention, the cylindrical skeleton 13 is provided with a cutout opening 16 at a desired position on the back surface. Therefore, the high temperature combustion gas flows from the notch opening 16 to the exhaust gas guide port 19,
A downward flow along the slope plate 18 is formed.

Subsequently, the gas is radiated from the heat dissipation window 14 through the gas flow path at the lower edge of the vertical plate.

As described above, according to the combustion chamber of the kerosene stove of the present invention, combustion gas is introduced into the waste heat dissipation chamber from the notch opening on the back of the skeleton, and is controlled by the slope plate in the waste heat dissipation chamber so that it is directed downward. form a flow.

Further, in order to equalize the flow rate of combustion exhaust gas passing through the porous heat transfer element, the gas flow path formed between the vertical plate 12 and the heat transfer element may be tapered.

In addition, the downward flow of combustion gas is guided to the front heat dissipation window, so
Combustion gases are not dissipated from the top of the stove.

FIG. 6 is a chart showing an experiment of the rise in temperature of clothes using the conventional method and the present invention, and it can be seen that the method according to the present invention has a large rise in temperature of clothes.

Furthermore, the present invention efficiently radiates far-infrared rays that are comfortable to the human body by making the porous heat transfer conversion element a porous body made of a far-infrared emitting substance or by coating the surface of the porous body with a far-infrared radiating substance. be able to.

For example, when a porous body made of stainless steel sintered body is used as a heat transfer element, 5 to 10 of the total radiated heat is used.
The amount of radiation of far infrared rays having a wavelength of 0- was about 20% as shown in FIG.

Polytyranocarbosilane<st> is added to this stainless steel sintered body.
-TI-6*>, the ratio of far-infrared radiant heat to the total radiation amount was 90%.

Furthermore, in the present invention, by making the front surface of the skeleton glass, it is possible to obtain a visual warmth due to the red-hot skeleton and to check the combustion state.

[Effects of the Invention] The present invention provides a combustion chamber for an open type kerosene stove,
Since the combustion exhaust gas is dissipated from the front of the stove, the sensible heat held by the combustion exhaust gas is converted into radiant heat.
Radiant heating can be done.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the present invention, FIG. 2 is a front view of FIG. 1, FIG. 3 is a side view of FIG. 1, FIGS. 4 and 5 are partial perspective views of the present invention, and FIG. Figure 7 is a comparison chart of clothing temperature rise, and Figure 7 is a comparison chart of radiant heat amount. lO2 case body 11: Exhaust heat dissipation chamber 13 Niskeleton 14: Heat dissipation window 16: Notch opening
18: Slope plate 2 diagram

Claims (1)

[Claims] 1. In a kerosene stove that burns fuel by foaming it,
An exhaust gas dispersion chamber that converts high-temperature combustion exhaust gas into a downward flow is provided on the side of the combustion chamber, and a heat transfer conversion element made of a porous material is installed in the front of the stove, and the combustion exhaust gas passes through the heat transfer conversion element. A kerosene stove characterized in that a flow path for combustion exhaust gas is formed in the exhaust gas diffusion chamber. 2. In an oil stove that burns liquid fuel by turning it into foam, a cylindrical skeleton is installed in the combustor, housed in the case body, and an exhaust gas guide port is bored in the side wall of the case body to create an exhaust heat dissipation chamber. A heat dissipation window of a porous heat transfer conversion element is provided on the front surface of the exhaust heat dissipation chamber, a slope plate having an angle α is fixed to the upper edge of the exhaust gas induction port, and a desired A kerosene stove characterized in that a part is cut out and opened to convert combustion gas into a downward flow along a slope plate through an exhaust gas induction port, and the combustion gas is dissipated from a heat radiation window of a porous heat transfer conversion element. combustion chamber. 3. The combustion chamber of an oil stove according to claim 2, wherein the porous heat transfer element is coated with a far-infrared emitting material.