JPH01269805A - Combustion equipment - Google Patents

Abstract

PURPOSE:To shorten fire extinction time required when a wick is lowered, by installing in the circumferential direction of the lower part of an outer pan an insulation section whose thickness is thinner than that of the other parts of said outer pan. CONSTITUTION:Even when the quantity of combustion in the lower part of a combustion chamber 8 is increased, a thin-wall insulation member 5a provided in the lower part of an outer pan 5 insulates the transmission of heat from the outer pan 5 to a wick outer cylinder 3, which reduces a rise in the temperature of the wick outer cylinder 3, thereby minimizing the heat of conduction from the wick outer cylinder 3 to a wick 1. Therefore, fuel is vaporized from an exposed surface of the wick 1, but the amount of vaporization from an unexposed section in the lower part of the thin wall insulation member is minimized, which eliminates the need to lower the exposure height of the wick unnecessarily and minimizes the generation of tar to the wick or the pan. Moreover, the rise in the temperature of the section is minimized. Therefore, when the wick is lowered to put out fire, fire can be put out in a short time.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to a combustion device used for home heating and the like.

2. Description of the Related Art A kerosene stove, which has been widely used as this type of combustion device, is generally of the type shown in FIG. Third
In the figure, reference numeral 1 denotes a lamp wick which freely moves up and down between a wick guide tube 2 and a wick outer tube 3. The upper ends of the core guide tube 2 and the outer core tube 3 form an inner flame tray 4 and an outer flame tray 5, respectively, on which an inner flame tube 6 and an outer flame tube 7 are placed. During combustion, the tip of the wick 1 is exposed into a combustion chamber 8 formed between an inner flame tube 6 and an outer flame tube 7, where the fuel is vaporized. Reference numeral 9 denotes an outer cylinder, and the inner flame cylinder 6, outer flame cylinder 7, and outer cylinder 9 are arranged approximately concentrically in order from the inside and are approximately fixed by fixing pins 10. 11 is the inner flame tube 6
and a large number of small holes provided in the outer flame cylinder 7 through which air can pass. Reference numeral 12 denotes an inner flame tube top plate that closes the L-end opening of the inner flame tube 6, and has a ventilation hole 13 communicating from the inside of the inner flame tube 6 upward. 14 is a flame expansion plate placed on the top plate 12 of the inner flame tube.

A constriction part 15 is formed at the upper end of the outer cylinder 9, and a glowing part 16 is formed in the outer flame cylinder 7 above the constriction part 15, and a through hole 17 with a large opening is provided. Reference numeral 18 denotes a transparent tube made of a transparent material such as glass, and is placed on top of the outer tube 9. 19 is a frame top placed on the upper end of the glowing part 16 so as to block the upper end of the air passage 20 between the glowing part 16 and the transmitting tube 18, and fixing the transmitting tube.

In the above configuration, when the lamp wick 1 is ignited, the fuel vaporizes and starts combustion. The fuel continues to vaporize due to the heat of combustion, and the air necessary for combustion flows into the combustion chamber through the air holes 11 of the inner flame tube 6, the outer flame tube 7, and the through holes 17 of the red-hot part 16 due to the thermal draft generated in the combustion chamber 8. 8 and continues combustion, heating the red-hot section 16 to red-hot temperature, which is used as radiant heat for heating, etc.

Problems to be Solved by the Invention According to such conventional means, the amount of vaporization is reduced compared to the amount of air supplied when the exposed height of the lamp wick 1 is lowered to reduce the amount of vaporization and combustion. If the amount of combustion in the lower part of the combustion chamber 8 increases and the amount of vaporization is larger than the amount of air, the lower part of the combustion chamber will be in a state of air shortage, and the amount of combustion in the middle and upper part of the combustion chamber 8 will increase. ) Heat the wick 1, the inner fire pan 4, and the outer fire pan 5. For this reason, the amount of heat given to the wick 1 increases and the vaporization area decreases, but the amount of vaporization does not decrease much, and in order to further reduce the amount of vaporization, the exposed height of the wick 1 must be made lower than the fire pan 4.5. Required, fire pan part 4.5
As the temperature rises further, tar is formed between the parts. wick 1
It takes a long time to extinguish the fire even if you descend and try to extinguish it. When the exposed height of one core is increased to increase the combustion amount from a state of a small combustion amount, the amount of vaporization becomes temporarily excessive, resulting in the formation of an excessively large flame at the exit of the combustion tube.

Means for Solving the Problems In order to solve this problem, the present invention provides a heat insulating part that is thinner than the other parts of the outer fire pan in the circumferential direction at the bottom of the outer fire pan, thereby increasing the distance between the outer fire pan and the core outer cylinder. It has a structure that reduces heat conduction between the two.

Function In the above configuration, the vaporized fuel gas at the bottom of the combustion chamber diffuses and mixes with the air supplied from the air holes of the inner flame tube and outer flame tube, and as it burns, -F rises within the combustion chamber, and the combustion heat flows into the lamp wick. The impregnated fuel is heated and evaporated by air flowing roughly near the vaporizing surface of the wick. Heat transfer from the outer platter to the wick outer tube, which is in contact with the wick, is suppressed by the thin insulation section, and the conductive heat from the wick outer tube, which is one of the heat sources for heating the wick, is suppressed.
To reduce this, vaporization from the non-exposed portion of the wick is suppressed. Therefore, when the exposed height of the wick is high, the exposed part of the wick is heated and vaporized by the combustion flame and radiant heat from the inner and outer flame tubes near the wick, but when the exposed height is low, it receives radiant heat. As the area is reduced, there is less evaporation from the non-exposed portion of the wick, so the phenomenon that the amount of evaporation is difficult to reduce even if the exposed height of the wick is lowered is significantly reduced.

Example An embodiment of the present invention will be described below with reference to the drawings.

In Figures 1 and 2, reference numeral 1 is a lamp wick, which is set to move freely between the wick guide tube 2 and the wick cutting tube 3, and whose lower end is accumulated in the fuel in the fuel tank (not shown). ing. The upper end portions of the core guide tube 2 and the core outer tube 3 form an inner flame tray 4 and an outer flame tube 5, respectively, and an inner flame tube 6 and an outer flame tube 7 are placed on the upper portions, respectively.

5 m is a heat insulating section provided at the bottom of the outer grate 5 and has a thinner plate thickness than the other parts of the outer grate, and is provided in the circumferential direction of the outer grate. During combustion, the tip of the lamp wick 1 of the present invention is exposed within the combustion chamber 8 formed between the inner flame tube 6 and the outer flame tube 7, where the fuel is vaporized. Reference numeral 9 denotes an outer cylinder, and the inner flame cylinder 6, outer flame cylinder 7, and outer cylinder 9 are substantially fixed in a substantially concentric manner from the inside by fixing pins 10. Reference numeral 11 denotes a large number of air holes provided in the inner flame tube 6 and the outer flame tube 7. Reference numeral 12 denotes an inner flame tube top plate that closes the upper end opening of the inner flame tube 6, and has a ventilation hole 13 communicating upward from the inside of the inner flame tube 6. 14 is the inner flame tube top plate 12
It is a flame expansion plate connected to the top. A constriction part 15 is formed at the upper end of the outer cylinder 9, and a glowing part 16 is formed in the outer flame cylinder 7 above the constriction part 15, and a large through hole 17 is formed.
is being made. Reference numeral 18 denotes a transmission tube made of a heat-resistant, heat-transparent material such as glass, and is placed on the outer tube 9.

Reference numeral 19 is a frame top placed on both ends of the glowing part 16 so as to block the upper end of the air flow path 20 between the glowing part 16 and the transmitting tube 18, and fixing the transmitting tube 18.

In the above configuration, when the lamp wick 1 is ignited, the fuel vaporizes and starts combustion. The fuel is combustion heat and the small hole 11 near the wick 1.
The vaporization is continued by the air flow supplied by the thermal draft generated in the combustion chamber 8, and the air necessary for combustion is introduced into the combustion chamber 8 through the small holes 11 of the inner flame tube 6 and the fallen flame tube 7 through which the air passes. The vaporized gas of the supplied fuel and the diffusion mixture I7 rise within the combustion chamber 8 while being combusted. Red hot part 16 of outer flame tube 7
In the vicinity, high-temperature combustion gas containing unburned components rises close to the inner surface of the red-hot part 16 and heats the red-hot part 16 to red-hot. The radiant heat generated from this red-hot surface is used for heating.

In order to obtain a large amount of combustion, the exposed height of the lamp wick 1 into the combustion chamber 8 is increased, and the lamp wick 1 receives radiant heat from the flame in the combustion chamber 8, the heated inner flame tube 6, the lower part of the outer flame tube 7, The lamp wick 1 is heated by conduction heat from the wick guide tube 2 and the wick outer tube 3 with which the side surfaces are in contact, and the fuel impregnated inside is also heated.

A predetermined amount of vaporization can be obtained by lowering the fuel gas partial pressure near the vaporizing surface of the lamp wick 1 by using air supplied from the small holes 11 roughly in the vicinity of the lamp wick 1.

In order to reduce the amount of combustion, if the exposed height of the wick 1 is lowered, the air supplied from the small holes of the inner flame tube 6 and the outer flame tube 7 will not come into contact with the surface of the wick, and the amount of vaporization will be reduced.

A characteristic of this type of combustion method is that when adjusting the amount of vaporization by lowering the exposed height of the wick, the amount of vaporization temporarily decreases significantly, but after a while, it increases compared to immediately after lowering the exposed height. There is. This is because the amount of vaporization decreases relative to the amount of air supplied, so the amount of combustion at the bottom of the combustion chamber increases, and the supply of heat to the wick and the vicinity of the wick increases, which increases the amount of vaporization from the wick. This is the main cause.

Also, if the exposed height of the wick is lowered, the temperature of the wick will rise, so if you raise the exposed height to increase the combustion amount from a small combustion amount state, the amount of vaporization will temporarily become excessive and combustion will not be completed in the combustion chamber. Therefore, there is a phenomenon in which an excessive flame is formed at the exit of the combustion tube. This is because the temperature of the wick and the vicinity of the wick is high when the exposed height of the wick is low and the amount of combustion is small, and when the exposed height is increased to increase the amount of combustion, the vaporization area of the wick increases in a temporarily high temperature state. This is because the amount of vaporization becomes excessive because of this, and when the temperature decreases, the amount of vaporization returns to the normal amount.

According to the configuration of the present invention, even if the amount of combustion in the lower part of the combustion chamber 8 increases, the heat transfer from the outer fire pan 5 to the core outer cylinder 3 is insulated by the thin heat insulating part 5m provided at the lower part of the outer diameter JI 15. As a result, the temperature of the outer wick tube 3 increases less, and the amount of heat conducted from the outer wick tube 3 to the lamp wick 1 is reduced. Therefore, although fuel evaporates from the exposed surface of the lamp wick 1, the amount of evaporation from the non-exposed portion below the thin insulation section is reduced. In addition to the configuration of the present invention, there is also a configuration in which the overall thickness of the outer fire pan is made thinner, which is highly effective, but is difficult to put into practical use because the strength of the fire pan decreases and deforms.

Conventionally, when the exposed height of the wick 1 was lowered, the temperature of the outer fire pan 5 increased due to the lowering of the combustion position, and the wick outer tube 3 located below was heated by heat conduction, and the temperature of the outer wick tube 3 in contact with the wick outer tube 3 was increased. Since the wick 1 is heated, the non-exposed part of the wick 1
There was a problem that the amount of evaporation from the sides of the grill was large and the total amount of evaporation was difficult to reduce even if the exposed height above the fire pan 2.3 was lowered, but with the configuration of the present invention, the amount of evaporation from the non-exposed portion Because of this reduction, the total amount of vaporization tends to decrease. An example of the results is shown in the figures. Figure 4 shows the change in combustion amount with respect to the exposed height of the wick in the conventional example and the present invention, and Figure 5 shows the change in the combustion amount with respect to the exposed height of the wick in the conventional example and the present invention. It shows the change in temperature directly below the insulation part of the outer cylinder.

Therefore, there is no need to lower the exposed height of the wick more than necessary to reduce the amount of combustion, less tar is generated on the wick and fire pan, and the internal temperature rise is small, making it easier to lower the wick and extinguish the fire. extinguish the fire in a short period of time.

In addition, since the temperature rise of the lamp wick 1 and the fire pan 4.5 is small when the combustion amount is small, the extent to which the amount of vaporization becomes excessive can be significantly reduced even when the exposure height is increased.

Incidentally, as shown in FIG. 2(b), a heat insulating part '5a may be formed by pushing a plate outward from the inside of the lower outer periphery of the outer fire pan 5 to partially reduce the thickness.

Effects of the Invention As is clear from the above explanation, according to the combustion apparatus of the present invention, a heat insulating section is provided in the circumferential direction at the bottom of the outer grate, the thickness of which is thinner than that of the other parts of the outer grate. (1) By creating a thermally insulated structure between the parts, (1) less tar is generated on the lamp wick and the platter, and the life of the equipment is extended.

(2) When extinguishing a fire by lowering the wick, the extinguishing time is short and safe.

(3) There is less excessive combustion when switching from a small combustion amount to a large combustion amount.

The following effects can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a main part of a combustion device according to an embodiment of the present invention, FIG. 2 [a] is a side view of a main part of an embodiment of the present invention, and FIG.
b) is a side view of a main part of another embodiment, FIG. 3 is a sectional view of a main part of a conventional example, and FIGS. 4 and 5 are characteristic diagrams of an embodiment of the present invention. 1... Lamp wick, 2... Core guide tube, 3...
... Core outer cylinder, 4 ... Inner fire pan, 5 ...
Outer fire pan, 5... Insulation section, 6... Inner flame tube,
7... Outer flame tube, 8... Combustion chamber, 11...
...Small hole. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
Figure 3

Claims (1)

[Claims] a combustion tube having an inner flame tube and an outer flame tube with a large number of small holes; a lamp wick that is vertically movable at the bottom of a combustion chamber formed by a gap between the inner flame tube and the outer flame tube; A wick guide tube and a wick outer tube are provided for guiding the lamp wick, and the upper ends of the wick guide tube and the wick outer tube form an inner burner and an outer burner, respectively, and the plate thickness is increased in the circumferential direction of the lower part of the outer burner. A combustion device with a thinner insulation part than the other parts of the outer fire pan.