JPS6383508A - Kerosene stove - Google Patents

Abstract

PURPOSE:To obtain a kerosene stove, having porous plates by which the time required for reaching a stable combustion is shortened, as well as to make use of the advantage of heat-resistant properties of ceramics, by forming carbonized silicone films on the surfaces of ceramic porous plates. CONSTITUTION:Carbonized silicone films composed of carbonized silicone powder 16 and inorganic binder 17 are formed on the surfaces of porous ceramic plates 2 and 3 having an opening, and which are installed around a combustion wick. There are a printing method, a spray-up, a dip coating, and a brushing method as the methods to fix the carbonized silicone powder 16 to the porous plates by the inorganic binder 17. The carbonized silicone films formed in such a manner have a very high heat conductivity, so that the time required for red-heating, that is, a stable combustion, can be shortened.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to a kerosene stove, and in particular to the structure of a kerosene stove that radiates heat to the outside through a ceramic perforated plate installed around a combustion wick. be.

[Conventional technology] FIG. 5 is a sectional view of the main parts of a conventional kerosene stove.

In the figure, a combustion wick 1 is inserted into a wick outer cylinder 6 so as to be able to rise and fall freely.
A perforated plate 2 and a perforated plate 3 having openings are installed before and after the plate, and the upper part is attached to the reinforcing plate 10 with a holding fitting 12, respectively.
The lower part is fixed to the reinforcing plate 11 and the supporting plate 7.

A translucent plate 4 made of heat-resistant glass or the like is installed in front of the perforated plate 2, and its upper part is held by a translucent temporary presser 13.The rear of the perforated plate 3 is covered with an outer n8, and the upper end of the outer cylinder 8 A rectifying plate 9 inclined forward and upward is provided at the front. Furthermore, a reinforcing plate 14 having air inflow holes 15 below the perforated plate 2 is installed between the support plate 7 and the outer cylinder 8 .

The conventional kerosene stove is constructed as described above, and its operation will be explained below.

When the tip of the combustion wick 1 is ignited and set at a desired vertical position to start combustion, the perforated plates 2 and 3 gradually become red hot, releasing radiant heat to the outside through the transparent plate 4. do. On the other hand, the air warmed by the combustion of the combustion wick 1 rises through the air layer between the perforated plates 2 and 3, and flows out forward by the current plate 9. Efficient heating is achieved by using both radiant heat and convection heat.

[Problems to be Solved by the Invention] In the conventional kerosene stove as described above, the perforated plate is made of cojet, which is a material that has excellent resistance to thermal shock caused by the cycle of ignition → combustion → extinction, and has excellent heat resistance during combustion. Light or lithium ceramic is used. However, since the thermal conductivity is lower than that of a perforated plate made of gold a, it takes a long time to become red hot, that is, from ignition to stable combustion, resulting in a delay in reaching the specified heating capacity, and Prolongs the time it takes for odor to occur due to complete combustion.

This invention was made to solve this problem, and aims to provide a kerosene stove with a perforated plate that shortens the time required to reach stable combustion while still taking advantage of the heat resistance of ceramics. .

[Means for Solving the Problems] The kerosene stove according to the present invention has a silicon carbide film formed on the surface of a ceramic porous plate.

[Function] In the present invention, since the silicon carbide film formed on the surface of the porous plate has excellent thermal conductivity, the time required to reach red heat, that is, to reach stable combustion, is shortened.

[Conventional example] FIG. 1 is a sectional view showing an embodiment of the present invention.

In the figure, symbols @1 to 4.6 to 15 are exactly the same as the conventional device. Silicon carbide m is applied to the surfaces of the perforated plate 2 and the perforated plate 3.
5 is formed. The operation is the same as the conventional device.

FIG. 2 is an enlarged sectional view of a perforated plate in an embodiment of the present invention.

In the figure, a silicon carbide film made of silicon carbide powder 16 and an inorganic binder 17 is formed on the surfaces of perforated plate 2 and perforated plate 3. Methods for attaching the silicon carbide powder 1d using the inorganic binder 17 include a printing method, a spraying method, a dipping method, and a brush coating method.

FIG. 3 is a composition table for the printing method and the spraying method.

The glass frit used as an inorganic binder in the printing method is A fL20s 820s -8f Oz type (softening point 900°C) or A20--8! OzM(I
OMn 02 series (softening point 1100℃) is used, and after printing, the temperature is 1000-1200℃ depending on the softening point of the glass frit.
℃ to form a silicon carbide film.

The inorganic binder used in the spraying method is, for example, A grade 20s-8i such as Bedak #1500A manufactured by Sakai Chemical Industry Co., Ltd.
Use 02 series, add water and spray to the appropriate viscosity! After carrying out the second heating, a silicon carbide film is formed by drying at 50 to 100° C. for about 10 hours.

In either method, the film thickness is suitably about 5 to 30 mm, and if the film thickness is too thick, the adhesion will decrease.

FIG. 4 is a diagram showing the elapsed time from ignition of the perforated plate until it becomes red hot.

In the figure, the horizontal axis represents the elapsed time from the time of ignition, and the vertical axis represents the reddened area ratio of the perforated plate (relative to the entire perforated plate), and the solid line represents the perforated plate according to the present invention, and the dotted line represents the conventional perforated plate. There is.

Normally, the thermal conductivity of ceramic is about 0.005Ca1/c
g・℃・sea, but when silicon carbide powder is attached with an inorganic binder, the thermal conductivity is close to that of metal aluminum <0.2 to 0.5 cal/c++・℃・sec
becomes. Therefore, as shown in the figure, the In time required for the perforated plate of the present invention to completely turn red is about half that of the conventional perforated plate, so the time required for the start-up process from ignition to complete combustion is shortened. This makes it possible to reduce the amount of unburned gas or CO released into the glass chamber.

In the above embodiment, the perforated plate of a kerosene heater is targeted, but it goes without saying that the present invention can also be applied to other combustors aiming at the same effect of a perforated plate.

[Effects of the Invention] As explained above, this invention can shorten the time from ignition to stable combustion by forming a silicon carbide film on a ceramic porous plate, and can also reduce odor caused by incomplete combustion. It has the effect of reducing

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the present invention, FIG. 2 is an enlarged sectional view of a perforated plate of an embodiment of the invention, and FIG. 3 is a printing method and a spraying method of an embodiment of the invention. Composition table, No. 4
The figure shows the elapsed time from ignition of the perforated plate until it becomes red hot.
FIG. 5 is a sectional view of a conventional kerosene stove. In the figure, 1 is a combustion wick, 2 is a perforated plate, 3 is a perforated plate, and 5
1 is a silicon carbide film, 16 is a silicon carbide powder, and 17 is an inorganic binder. Note that the same reference numerals in each figure indicate the same or corresponding parts. Fig. 1 Fig. 2 Fig. 3 Fig. 4, Motomonika Taikyotsu - Kasuma Kuzu Fig. 5

Claims (2)

[Claims] (1) A kerosene stove equipped with a combustion wick and a ceramic perforated plate with open holes installed around the combustion wick, characterized in that a silicon carbide film is formed on the surface of the perforated plate. ,Kerosine stove. (2) The oil stove according to claim 1, wherein the silicon carbide film is formed by adding an inorganic binder to silicon carbide powder.