JPH029212Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a wick-elevating oil-burning appliance with an improved combustion tube.

[Technical background of the invention and its problems]

An oil-burning appliance with an elevating wick, for example, has a combustion tube consisting of an inner flame tube, an outer flame tube, and an outer tube made of perforated plates arranged concentrically at a distance from each other, and an outer tube having a transparent heat ray transmitting part on the upper part. The upper end of the wick protrudes between the inner and outer flame tubes of the combustion tube, and the oil supplied through the wick is combusted together with the combustion air. As a result of this combustion, the center and upper part of the outer flame tube,
That is, the part of the outer cylinder that faces the heat ray transmitting part is actively made red hot, and the temperature of that part is radiated to the outside. Further, the lower part of the outer flame tube, which is below the red-hot part, has a hole provided there with a lower porosity with respect to the mask than the red-hot part, and serves as a combustion part for the red-hot part.

In recent years, many of these oil-burning appliances have been used with the lamp wick located at a relatively high position for the purpose of reducing odor during combustion and preventing tar adhesion. In other words, extremely weak combustion is prevented by lowering the combustion wick height.

This wick height adjustment is done by the wick up/down mechanism, and in actual use, the wick height during combustion can be adjusted to a maximum of 10 mm.
Many have a minimum length of about 5 mm. By regulating the height of the wick during combustion, combustion exhaust gas is always clean, reducing odors and CO2.
occurrence will be reduced. In addition, since the temperature of the wick can be kept low, the amount of tar attached can be reduced and the life of the wick can be maintained for a long time. However, within the above-mentioned range of wick heights during combustion, the difference between the maximum 10 mm and the minimum 5 mm will result in a combustion calorific value of about 10%, but the red-hot state of the outer flame tube that can be visually observed from the outside is almost non-existent. Unchanged. Therefore, in actual use, the user feels uneconomical.

[Purpose of invention]

The purpose of the present invention is to change the red-hot part of the outer flame tube into a completely red-hot state and a partially non-red-hot state in a predetermined wick height range in which the combustion exhaust gas maintains a screen state. An object of the present invention is to provide an oil-burning appliance that improves the visual effect during adjustment.

[Summary of the idea]

The present invention has a combustion tube including an inner flame tube and an outer flame tube made of perforated plates arranged concentrically with a distance from each other, and an outer tube having a heat ray transmitting part on the upper part. In an oil-burning appliance having a wick peeking out between an inner flame tube and an outer flame tube, a lamp wick is provided in the inner flame tube at approximately the vertical midpoint of a portion of the outer flame tube that faces the heat ray transmitting part. By providing a bead that bulges out over the entire circumference, the entire outer flame cylinder facing the heat ray transmitting part becomes red hot under intense combustion within a specified wick height range that keeps the combustion exhaust gas in a screen state. In addition, in a weak combustion state in the above range, only the portion of the outer flame tube below the bead becomes red hot, thereby improving the visual effect.

[Example of idea]

Hereinafter, the present invention will be described in detail with reference to an embodiment shown in the drawings.

In Fig. 1, 11 is a housing-like instrument body;
Although not shown in the lower part of the interior, a burner section is configured. This burner section includes a fixed tank for combustion, a cylindrical wick guide that is integrally erected from within this fixed tank, a burner basket that surrounds the outside of this wick guide at a distance, and a burner basket that rises and lowers around the outer periphery of the wick guide. It consists of a light wick etc. that can be attached.
A combustion tube 21 is placed on the burner section and burns oil supplied from the wick together with air. One side of the appliance main body 11 facing the combustion tube 21 is open and serves as a heat radiation surface, and a guard 12 is provided here. In addition, an ignition knob 13, a fire power adjustment knob 14, a fire extinguishing knob 15, and the like are installed on the front part housing the burner part. Reference numeral 16 denotes a cartridge tank, which supplies oil to the fixed tank of the burner section so that the oil level thereof is constant.

As shown in FIGS. 2 and 3, the combustion tube 21 has an inner flame tube 22, an outer flame tube 23, and an outer flame tube 24, which are arranged concentrically with a space between them. protrudes between the inner flame tube 22 and the outer flame tube 23 when rising. A rectifying plate stand 25 is installed on the upper end surface of the inner flame cylinder 22 by spot welding, and a rectifying plate 26 is integrally supported on the upper part thereof by spot welding as well. Further, a guide disk 27 is integrally provided at the lower part of the inner flame cylinder 22, and a reinforcing ring 28 is integrally provided at the upper part. In addition,
A plurality of openings are provided at appropriate locations in each of the baffle plate base 25 and the guide disk 27 for air circulation.

Both the inner flame tube 22 and the outer flame tube 23 have small holes 2
It is formed by a perforated plate with a large number of holes 2A and 23A perforated therein. Further, the outer cylinder 24 has a transparent heat ray transmitting part 24a made of heat-resistant glass or the like at its upper part, and is integrally connected to a metal support cylinder part 24b at the lower part. It is held by a glass cylinder holder 29 provided at the upper end of the glass cylinder. Note that 30 is a combustion tube knob.

As mentioned above, the support cylinder part 24b constituting the outer cylinder 24 is made of metal and press-molded into a cylinder shape, and the surface is treated with gloss plating or enamel processing to improve rust prevention and aesthetic appearance. is improving.
In addition, the heat ray transmitting portion 24a made of heat-resistant glass or the like is
Generally, the surface has a straight cylindrical shape, but it may have a wavy shape or an uneven shape for the purpose of increasing radiation efficiency through diffused reflection, aesthetic appearance, or guiding the inflow of combustion air.

The combustion tube 21 is placed on the outer edge of the wick guide cap 32 and the upper end of the burner basket 33, which constitute the burner section, as shown in the figure, and the upper end of the lamp wick 34 is inserted between them into the inner flame tube. 2
2 and the outer flame tube 23. The figure shows the lamp wick 34 being raised to the combustion position, and when extinguishing the fire, the lamp wick 34 is lowered between the wick guide 35 and the burner basket 33.

Here, the center and upper part of the outer flame tube 23,
That is, as shown in FIG. 4, the portion of the outer cylinder 24 facing the heat ray transmitting portion 24a is made into a red-hot portion with a void ratio of 40 to 70% relative to the plate surface due to the small holes 23A. In addition, the lower part, that is, the outer cylinder 24
The portion facing the support cylinder portion 24b is a small hole 23A.
The combustion part is set to have a void ratio of 5 to 15% relative to the plate surface. Furthermore, a bead 36 that bulges toward the inner flame cylinder 22 side is provided over the entire circumference at approximately the middle in the vertical direction of the red-hot part facing the heat ray transmitting part 24a. Further, the void ratio of the small holes 22A of the inner flame cylinder 22 to the plate surface is approximately 5 to 15%.

In the above configuration, when performing combustion operation, operate the ignition knob 13 shown in FIG.
The inner flame tube 22 and the outer flame tube 2 of the combustion tube 21 are raised.
3 and ignite it to burn it. After ignition, while taking in outside air through the small holes 22A and 23A provided in the inner flame tube 22 and the outer flame tube 23, the amount of vaporized gas and the combustion amount are gradually increased, and a stable combustion state is reached.

Here, the position of the combustion reaction between kerosene gas and air is approximately determined by the static pressure value at each position.
For example, when the amount of air flowing in from the small hole 22A of the inner flame tube 22 is large, the amount of volumetric expansion of air due to combustion heat in a portion close to the inner flame tube 22 increases, which acts to push the combustion gas toward the outer flame tube 23 side. occurs, and the outer flame cylinder 23
temperature increases. On the other hand, if the amount of air flowing in from the outer flame tube 23 side is large, the opposite effect to that described above will occur, and the temperature of the outer flame tube 23 will decrease. Generally, in order to improve visibility and heating effects, efforts are made to move the combustion reaction layer closer to the outer cylinder, but in this case, as mentioned above, there is a visual difference between the maximum wick height of 10 mm and the minimum 5 mm during combustion. It won't work.

However, in the present invention, since the bead 36 that bulges toward the inner flame tube 22 is formed at approximately the vertical midpoint of the red-hot part of the outer flame tube 23, the above-mentioned problem of not being visually distinguishable occurs. will be resolved. The effect will be explained in detail below.

During combustion, the kerosene reaction gas that rises as it approaches the inner wall surface of the outer flame tube 23 is guided by a bead 36 provided in the middle and changes its direction toward the inner flame tube 22 side. Therefore, the temperature above the bead 36 is lower than that below the bead 36, and depending on the height of the wick 34, the red-hot state changes to such an extent that it can be visually determined.

In other words, if the wick 34 is located at the lowest height of the wick height adjustment range that maintains the heat exchanger gas in a clean state, for example, 5 mm, the amount of vaporized kerosene gas will be small, the combustion draft force will be small, and the inner flame will be reduced. The amount of air flowing in from the cylinder 22 side is also appropriately saved. Therefore, as described above, when the kerosene reaction gas is guided toward the inner flame cylinder 22 side by the bead 36, the part of the red-hot part above the bead 36 becomes lower temperature than the lower part, and the upper part becomes red-hot. Not enough.

In addition, in the case of combustion with a wick height of at least 5 mm as described above, there is another method that lowers the temperature above the bead 36.
One major factor is the static pressure balance in each part. That is, since the flame itself has convergence, in the case of a double-tube burner like the one of the present invention, the flame tends to approach the inner flame tube 22 side. In other words, the portion where the static pressure value changes largely due to the draft that changes with the change in the amount of vaporized kerosene gas is inside the inner flame tube 22 rather than between the outer flame tube 23 and the outer tube 24. For this reason, the static pressure between the outer flame tube 23 and the outer tube 24 hardly changes when the wick height is both the maximum 10 mm and the minimum 5 mm, while the inside of the inner flame tube 22 is affected by the combustion gas. The larger the draft, the higher the static pressure value. Further, the donut-shaped gap between the outer flame cylinder 23 and the outer cylinder 24 is formed by a glass cylinder retainer 2 provided at the top.
9, and the static pressure distribution in this gap increases as it approaches the glass cylinder retainer 29 because a closing effect occurs. As a result, during combustion when the wick height is at least 5 mm, the temperature above the bead 36 is lower than that below, and the temperature does not reach red heat. That is, of the glowing part facing the heat ray transmitting part 24a, only the part below the bead 36 becomes red hot, and the part above it does not become red hot, so this state can be visually observed from the outside through the heat ray transmitting part 24a, and the user can check the wick height. It can be properly determined that combustion occurs at a minimum depth of 5 mm.

On the other hand, during combustion with a maximum wick height of 10 mm, the combustion draft is active because the amount of kerosene vaporized gas from the wick 34 is large enough, and the inflow space from the inner flame tube 22 side is also large enough. , the combustion reaction layer that has risen beyond the bead 36 is once again pushed toward the outer flame cylinder 23 side. Therefore, the area above the bead 36 also becomes red hot. That is, the heat ray transmitting portion 2 of the outer cylinder 24
The entire red-hot part of the outer flame cylinder 23 facing 4a becomes red-hot uniformly. Therefore, by visually observing this red-hot state, the user can clearly determine that combustion is occurring at a maximum wick height of 10 mm.

Here, the reason why the bead 36 is provided approximately in the middle in the vertical direction of the incandescent part facing the heat ray transmitting part 24a is as follows. That is, if the bead 36 is provided at a position close to the lower end of the heat ray transmitting section 24a at the bottom of the red-hot section, the static pressure distribution between the outer flame tube 23 and the heat ray transmitting section 24a will be lower in the middle than in the upper part, and furthermore in the lower part. Because of the low temperature, the combustion reaction gas layer that has passed over the bead 36 approaches the inner wall surface of the outer flame tube 23 again.
Therefore, the entire red-hot part is always red-hot, and the visual discrimination effect is lost.

On the other hand, if the bead 36 is provided above the middle part in the vertical direction, the temperature above the bead 36 will be lowered to a greater degree, but the area will be smaller, so the visual discrimination effect will still be reduced.

As a result, the appropriate position of the bead 36 is approximately in the vertical direction of the incandescent part facing the heat ray transmitting part 24a.

By providing a bead 36 all around the red-hot part of the outer flame tube 23, that is, the part that becomes the hottest, the strength of the outer flame tube 23 is improved and a stable combustion state can be maintained for a long time. is obtained.

[Effect of idea]

As described above, according to the present invention, combustion exhaust gas is
In the adjustment range of the wick height, which maintains a green state with reduced odor and CO emissions, when the wick is at its maximum height, the entire outer flame tube facing the heat ray transmitting part becomes red hot, and when the wick is at its lowest height, the entire outer flame tube becomes red hot. During combustion, only about the lower half of the outer flame tube (below the bead) becomes red hot, so these two combustion states can be reliably visually distinguished from the outside, and the visual effect during economical combustion is great.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an embodiment of the oil combustion appliance according to the present invention, and FIGS. 2 and 3 are a partially cutaway perspective view and a partially cutaway front view showing the configuration of the combustion tube shown in FIG. 1. , FIG. 4 is a diagram showing the distribution of small holes in the red-hot part and the combustion part of the outer flame tube shown in FIG. 3. 21... Combustion tube, 22... Inner flame tube, 23... Outer flame tube,
24...Outer tube, 24a...Heat ray transmitting part, 34...Light wick,
36...Bead.

Claims (1)

[Scope of utility model registration request] The combustion tube has an inner flame tube and an outer flame tube made of perforated plates arranged concentrically with a distance from each other, and an outer tube having a heat ray transmitting part on the upper part. In an oil-burning appliance having a wick peeking out between the outer flame tube and the outer flame tube, a portion of the outer flame tube that bulges out toward the inner flame tube at approximately the vertical midpoint of a portion of the outer flame tube that faces the heat ray transmitting section. An oil-burning appliance characterized by a bead that extends all around the circumference.