JPH0223935Y2 - - 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] Oil-burning appliances with an elevating wick include, for example, an inner flame tube, an outer flame tube, and a transparent heat ray transmitting part made of perforated plates arranged concentrically with a distance between each other. The upper end of the lamp wick protrudes between the inner and outer flame cylinders of the combustion cylinder, and the oil supplied through the lamp wick is collected together with combustion air. It is designed to be burned. 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 void ratio with respect to the plate surface than the red-hot part, and serves as a combustion part for the red-hot part.

In such oil-burning appliances, the cylindrical lamp wick is divided into a plurality of wick units, and each of these wick units can be moved up and down individually. A structure in which each wick was separated into a combustion chamber was considered.

In the oil-burning appliance configured as described above, in the case of strong combustion, all the wick units are raised to the combustion position to obtain a stronger combustion state as a whole of the wick. On the other hand,
In the case of weak combustion, if the wick is divided into two wick units, only one wick unit is raised to the combustion position, and the other wick unit is kept in a non-burning state. That is, a weak combustion state is obtained by making a part of the wick into a non-combustion state.

When the combustion amount is adjusted as described above, the entire outer flame cylinder becomes red hot evenly in a strong combustion state, and the combustion conditions are kept in the best balance. On the other hand, in a weak combustion state, only the part of the outer flame tube that corresponds to the wick that has risen to the combustion position, for example, about half of the entire circumference, becomes red-hot, and the red-hot part (750 to 820 degrees Celsius) and the non-red-hot part ( 400-450℃), there is a temperature difference of about 350-400℃.

When there is such a temperature difference, the cylindrical outer flame tube under the same conditions as when both ends are fixed,
A thermal stress of approximately 100Kg/ ^mm2 is applied. Generally, ferrite-type stainless steel, which is a highly heat-resistant material, is used for this type of outer flame tube. This material has a low coefficient of thermal expansion and excellent corrosion resistance, but its mechanical properties at high temperatures are weak, and its tensile strength at 800°C is 10 to 20.
It is about Kg/ ^mm2 . For this reason, repeated strong and weak combustion may cause dents and spots in the red-hot part, and the end face of the outer flame cylinder combustion part may lack flatness.
It may cause wobbling on the hot plate. This state causes problems such as red flame rising during combustion, combustion noise, bad smell, etc.

[Purpose of invention]

The purpose of this invention is to prevent thermal deformation of the outer flame cylinder due to the temperature difference between the red-hot part and the non-red-hot part, and to prevent excess air in the combustion part of the outer flame cylinder, so that good combustion conditions can always be obtained. The purpose of the present invention is to provide an oil-burning appliance that has the following properties.

[Summary of the idea]

The present invention has a lamp wick configured in a cylindrical shape with a plurality of wick units divided into a plurality of wick units, each of which can be moved up and down individually, and an inner flame tube arranged concentrically with a gap between each other on the wick, In an oil combustion appliance comprising an outer flame tube and a combustion tube having an outer tube and a space between the inner flame tube and the outer flame tube divided as a combustion chamber for each of the wick units, Vertical slits reaching from a part of the combustion section to the upper end side are provided on the peripheral surface of the outer flame cylinder corresponding to the side ends, and the ranges of these vertical slits that become part of the combustion section are covered. A blind plate is arranged as shown in FIG. In addition to preventing thermal deformation, by covering a portion of the vertical slit in the combustion section of the outer flame tube with a blind plate, it is possible to prevent the combustion balance from being lost due to a local excess of air.

[Example of idea]

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

In FIG. 1, reference numeral 11 denotes a fixed tank for fuel, which is the main part of the burner section, and is installed on a stand 12. A cylindrical wick guide 13 is integrally erected inside the fixed tank 11, and a cylindrical wick 15 is supported vertically movably with a burner basket 14 surrounding the outside at a distance.

The above-mentioned lamp wick 15 is provided in plural units for controlling the combustion amount, for example, two lamp wick units 15a and 15 as shown in FIG.
b, which can be individually moved up and down by a drive mechanism (not shown).

Incidentally, the upper end opening of the core guide 13 is covered by a core guide cap 16, and a stepped portion 16a formed on the outer edge of the core guide cap 16 is connected to the burner basket 14.
The upper end bent portion 14a constitutes a fire pan portion. Further, a plurality of ventilation holes 17 are provided on the plate surface of the core guide cap 16 to supply combustion air into the combustion tube 21 provided above.

As shown in FIGS. 1 and 2, this combustion tube 21 has an inner flame tube 22, an outer flame tube 23, and an outer tube 24 that are arranged concentrically with a space between them, and the lamp wick. 15 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 tube 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 provided at the lower part of the inner flame cylinder 22, and a reinforcing ring (not shown) is provided at the upper part thereof. In addition, a plurality of openings 25a and 27a are provided at appropriate positions in the rectifying plate base 25 and the guide disk 27, respectively, 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. In addition, 30 is a cross pin that connects each of the above-mentioned cylinders.

As mentioned above, the support cylinder part 24b constituting the outer cylinder 24 is made of metal and press-molded into a cylindrical 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, as shown, on the outer edge of the wick guide cap 16 constituting the burner section and on the upper bent portion 14a of the burner basket 14, and the upper end of the lamp wick 15 is inserted between these. It extends between the inner flame tube 22 and the outer flame tube 23.
The figure shows the lamp wick 15 raised to the combustion position, and when extinguishing the fire, the lamp wick 15 is raised to the combustion position.
is lowered between the core guide 13 and the burner basket 14.

Here, the center and upper part of the outer flame cylinder 23,
That is, as shown in FIG. 3, the part of the outer cylinder 24 facing the heat ray transmitting part 24a has a space ratio of 40 to 70% with respect to the plate surface due to the small holes 23A.
Let it be a. Further, a portion below this, that is, a portion of the outer cylinder 24 facing the support cylinder portion 24b is set as a combustion portion 23b with a space ratio of 5 to 15% relative to the plate surface due to the small holes 23A.

Further, the lamp wick 15, as shown in FIG.
The inner flame tube 22 is divided into two wick units 15b, and a partition plate 31 along the vertical direction is provided on the outer circumferential surface of the inner flame tube 22 corresponding to the side ends thereof, and the inner flame tube 22 and the outer flame tube are separated from each other. 23, each wick unit 15
The combustion chambers 34a and 34b are divided into combustion chambers 34a and 15b.

Furthermore, vertical slits 32 are provided on the peripheral surface of the outer flame tube 23 facing the side ends of the partition plate 31, respectively. These vertical slits 32 are formed from a part (upper part) of the combustion part 23b of the outer flame tube 23 to reach the upper end side of the outer flame tube 23, as shown in FIG.
Reference numeral 33 denotes a blind plate, which is provided so as to cover the lower part of the vertical slit 32, that is, the portion existing in the combustion section 23b. Then, it is fixed 33a to the outer flame tube 23 by spot welding or the like on either one of the circumferential surfaces partitioned by the vertical slits 32.

In addition, a partition plate 35 is also provided inside the inner flame cylinder 22,
The inside of the inner flame cylinder 22 is divided into spaces for each combustion chamber 34a, 34b.

In the above configuration, in the strong combustion state, the two wick units 15a and 15b rise to the combustion position shown in FIG. 1 and enter the combustion state, so the outer flame tube 2
No local deformation occurs because the entire part 3 becomes red-hot uniformly.

On the other hand, in a weak combustion state, the combustion position of only one wick unit, for example 15a, rises and becomes a combustion state, so that the vertical slit 32 of the outer flame tube 23
Only the portion facing the wick unit 15a becomes red hot. In this case, the red-hot part (combustion side) of the outer flame tube 23 generates a force that spreads outward and a force that extends upward. According to experiments, the outward spread is about 2 to 3 mm on one side, and the upward extension is about 1.0 to 1.5 mm.

Here, the inner flame tube 22 and the outer flame tube 2 on the combustion side
3, there is a gas layer directly above the wick 15a, and no combustion is occurring. A blue flame combustion zone appears above this gas layer. Therefore, when preventing thermal deformation in the weak combustion state mentioned above,
Forming the vertical slits 32 close to the gas layer is most effective in preventing deformation. In other words, the temperature difference between the gas layer and the blue flame combustion zone is as large as approximately 200°C.
Dividing such a high-temperature portion with the vertical slits 32 allows for free thermal expansion, which facilitates recovery by cooling and makes it difficult for permanent deformation to occur.

However, the presence of the vertical slit 32 in the combustion section 23b results in a localized excess of air, impairing the combustion balance and causing red flame. Therefore, in the present invention, by covering the portion of the vertical slit 32 located in the combustion section 23b with a blind plate 33, the above-mentioned local excess air condition is prevented and normal combustion is always performed. In addition, the vertical slit 32 is inserted between the blind plate 33 and the outer flame cylinder.
Since it is fixed only to one of the circumferential surfaces separated by , it is not affected by the thermal expansion described above and can perform the function of preventing thermal deformation.

[Effect of idea]

As described above, according to the present invention, a vertical slit is provided between the combustion side and the non-combustion side of the outer flame tube in a weak combustion state (partial combustion state) by the split wick, and the combustion of this vertical slit is Since the part existing in the outer flame tube is covered with a blind plate and this blind plate is fixed to one side of the circumferential surface separated by a vertical slit, thermal deformation of the outer flame tube occurs even if strong combustion and weak combustion are repeated. Normal combustion conditions can always be obtained without causing abnormal combustion due to local excess air.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view showing an embodiment of the oil-burning appliance according to the present invention, Fig. 2 is a cross-sectional view of the main parts in Fig. 1, and Fig. 3 is a perspective view of the outer flame tube shown in Fig. 1. It is a diagram. 15...Light wick, 15a, 15b...Light wick unit,
21... Combustion tube, 22... Inner flame tube, 23... Outer flame tube, 23a... Combustion section, 24... Outer tube, 32...
Vertical slit, 33...blind board.

Claims (1)

[Claims for Utility Model Registration] A lamp wick consisting of a cylindrical wick composed of a plurality of wick units each of which can be individually moved up and down, and arranged concentrically on the wick with a gap between each other. An oil combustion appliance comprising an inner flame tube, an outer flame tube, and an outer flame tube, and a combustion chamber separated between the inner flame tube and the outer flame tube as a combustion chamber for each wick unit, the above-mentioned. Vertical slits are provided on the circumferential surface of the outer flame cylinder corresponding to between the side ends of each wick unit, and each vertical slit reaches from a part of the combustion part to the upper end side, and a part of the combustion part of these vertical slits 1. An oil burning appliance characterized in that a blind plate is arranged to cover a range in which the area is covered, and the blind plate is fixed to either one of the peripheral surfaces of the outer flame cylinder divided by the vertical slits.