JPS6335207Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a wick type oil burning device such as a portable stove.

Configuration of conventional examples and their problems As shown in FIG. 1, a conventional lamp-type oil combustion device, such as a portable stove, has a lamp wick 4 that sucks up and vaporizes fuel 3 from a tank 2 disposed at the bottom of a housing 1. , wick inner/outer cylinders 5, 6 which sandwich the lamp wick 4 and hold it vertically movably, and the wick inner/outer cylinders 5, 6.
The inside with many pores placed on the upper end of the fire pan.
An outer flame cylinder 7, 8, an outer cylinder 9 disposed to cover the inner and outer flame cylinders 7, 8, and a cylindrical combustion cylinder provided above the outer periphery of the outer cylinder 9 to obtain a draft of combustion air. Some combustion cylinders are equipped with a damper 11 that closes the uppermost opening of the combustion cylinder 10 and changes the cross-sectional area of the opening to adjust the draft amount of combustion air. This kind of stove has the wick 4 inside.
When the igniter is used to ignite the flame between the outer flame tubes 7 and 8, the heat vaporizes the fuel 3 and gradually increases the draft of the combustion air, starting combustion. Most of the combustion is mainly pore combustion carried out in the numerous pores of the inner and outer flame tubes 7 and 8, and the heat is fed back to the wick 4, thereby promoting the vaporization of the fuel 3 from the wick 4. Then, the combustion is continued while maintaining the vaporized amount of the fuel 3 according to the pore combustion and the draft amount.

When the damper 11 provided at the upper opening of the combustion tube 10 is fully opened, the draft effect is maximized and the amount of combustion air sent to the pores of the inner and outer flame tubes 7 and 8 is maximized. The vaporizers provided in the inner flame cylinder 7 have minute holes that prevent pore combustion there, and only supply air for combustion. In addition, stomatal combustion is formed in almost all of the small and large pores provided in the outer flame cylinder 8, and this stomatal combustion reaches its maximum, and the amount of vaporized fuel 3 from the lamp wick 4 reaches its maximum, resulting in strong combustion. state. Next, when the damper 11 is gradually closed to reduce the draft effect, the air supplied to the inner and outer flame tubes 7 and 8 becomes smaller, and the outer flame tube 8
The combustion pores formed in the lamp wick become smaller, the amount of vaporized fuel 3 in the wick 4 decreases, and the amount of combustion decreases. As the damper 11 is further closed, the stomatal combustion becomes smaller and weaker, and eventually some of the small pores of the outer flame cylinder 8 no longer form stomatal combustion.
It only supplies combustion air. During such weak combustion, where there is little combustion air and stomatal combustion is small and weak, if stomatal combustion is temporarily disturbed by wind or other impact, stomatal combustion will temporarily become disorganized.
It becomes difficult to return to the original state. If this happens, the amount of heat given to the wick 4 due to stomatal combustion will change, so the damper 11
There was a problem in that the amount of combustion varied even if the degree of opening was the same, that is, the draft state was almost the same. Moreover, in this state, the balance between the amount of vaporized fuel 3 from the lamp wick 4 and the supply of combustion air by the draft, that is, the excess air ratio, changes greatly, causing the generation of toxic carbon monoxide, yellow flame soot, etc. There were also problems that could occur.

To explain pore combustion in more detail, for example, if the pore arrangement of the outer flame tube 8 is all vertical pitch uniform, horizontal pitch is also uniform, and all pores have the same diameter, upper pore combustion will be better than lower pore combustion. It is more stable than stomatal combustion. This is because some of the air supplied from the lower pores is not all used for lower pore combustion, but a portion of it is mixed with vaporized gas as premixed air and is used for pore combustion in the upper pores. It is. However, the influence of the lamp wick 4 on the vaporization of the fuel 3 is greatest in the one that is closer in distance, that is, the lower pore combustion. Therefore, in order to stabilize the pore combustion, the outer flame tube 8 has nine pores from the bottom to A, B, C, ..., I, as shown in Fig. 2.
The 1st and 2nd rows from the bottom are provided with half the horizontal pore pitch P _H of the 3rd and subsequent rows, making them dense, and the vertical pore pitches of the 1st to 3rd rows from the bottom are The pores in the fourth and subsequent stages are arranged at a pitch smaller than the pore pitch P _V and are densely packed. Furthermore, A in the first row
The pore diameter is 1.2mm in diameter, and the second stage B pore diameter is 1.6mm in diameter.
mm, the third row C pore diameter is 1.2 mm in diameter,
They are arranged as small holes, large holes, and small holes. Furthermore, from the fourth stage onwards, rows of pores with a diameter of 1.2 mm and rows with a diameter of 1.6 mm are arranged alternately, and rows of small and large pores are arranged alternately with small and large pores. Therefore, with this configuration, during weak combustion, pore combustion is not formed in the pore rows of the small pores, that is, the pore rows A, C, D, F, and H, and combustion air is supplied. , the stomatal combustion of the large pore rows B, E, G, and I becomes assisted, and the stomatal combustion tends to be stable. However, it is still not sufficient to withstand impacts from wind, etc. Especially in the B pore row, there is little premixed air, so stomatal combustion tends to become disorganized.Furthermore, once stomatal combustion is disturbed, it is difficult to return to its original state. There was a problem that some bad phenomena could occur.

Purpose of the invention The present invention was created in view of the above-mentioned problems. It stabilizes stomatal combustion even during weak combustion, and also suppresses stomatal combustion from being disorganized due to wind impact. The purpose is to restore the original state even if the

Structure of the invention In order to achieve the above object, the present invention provides a part of the pores of the outer flame tube with a 4-row pore group zone in which the vertical pore pitch is denser than in other pore parts, and this 4-row pore group zone. The pore diameter of the band is formed in series with small pores, large pores, small pores, and small pores from the bottom, and the horizontal pitch of the pores in the lower three rows of the four-row pore group zone is the same as the horizontal pitch of the pores in the upper part. It maintains stable pore combustion in its dense 4-row pore group zone, and at the same time suppresses disturbances in pore combustion caused by impacts such as wind, and even if disturbance occurs, it immediately returns to its original state. It's starting to get back to normal.

DESCRIPTION OF EMBODIMENTS An embodiment will be described below, but the explanation of the same parts as the conventional example will be omitted, and only the different parts will be explained. In FIG. , C1, C2, ..., 10 stages are provided. The first to third stages from the bottom are provided with half the horizontal pore pitch P _H of the fourth and subsequent stages, and are in a dense state. Also from the bottom 1
~Up to the 4th stage are the vertical pore pitches from the 5th stage onwards.
They are arranged at a smaller pitch than P _V and are densely packed. In addition, the first stage A pore diameter is, for example, 1.2 mm in diameter.
The pore diameter in the second stage is 1.6 mm in diameter, C1 in the third and fourth stages,
C2 pore size is 1.2mm in diameter, small pore, large pore,
It is arranged with small holes and small holes. From the fourth stage onward, for example, rows of pores with a diameter of 1.2 mm and rows of pores with a diameter of 1.6 mm are arranged alternately, and rows of large and small pores are arranged alternately with small pores and large pores. .

Here, to explain in detail the characteristics of stomatal combustion due to the stomatal arrangement, the serial stomatal rows surrounded by the broken line in FIG. 3 are more likely to stabilize stomatal combustion than the staggered stomatal arrangement shown above. This is because the air supplied from the pores sucks the vaporized gas and premixed air of the fuel 3 from below, and in the staggered pore arrangement, the vaporized gas and premixed air from below are diffused and the overall effect is The vaporized gas and premixed air are uniformly dispersed, but the pore combustion of the staggered pore arrangement itself is unstable, whereas the serial pore arrangement allows the vaporized gas and premixed air to coagulate. This is because the pores of the serial pore arrangement themselves tend to be stable, but the lateral connections become weak. Therefore, in the present invention, we have further added a cross-shaped pore array surrounded by a dashed line, which facilitates stable pore combustion in the central pore due to the mutual interference of the combustion air supplied from the upper, lower, left, and right pores, between the serial pore arrays. The pores are arranged in a complex manner, and the lateral connections between the series of pores are also strengthened. Furthermore, as a synergistic effect of the above-mentioned series pore arrangement and cross-shaped pore arrangement, the stability of lateral pore combustion can be accentuated, and even if pore combustion is disturbed during weak combustion, the 4-stage series section Stomatal combustion remains in the B pores of the 3rd stage series part, and the pore combustion of the B pores in the 4th stage series part remains.
Temporarily moves to C1 and C2 pores, and then in a short time to the 4th pore.
The pore combustion of the C1 and C2 pores in the series series section returns to the pores in the three series series, and the state is hardly unstable.

Effects of the invention As described above, according to the present invention, even in weak combustion where stomatal combustion is easily disturbed, the stomatal combustion in the outer flame tube near the wick is stabilized and difficult to be disturbed, and even when it is disturbed, it is hardly unstable. This has the effect of preventing this from occurring, making it easier to return to the original state, and stabilizing combustion overall.

[Brief explanation of the drawing]

FIG. 1 is a front sectional view of the present invention and a conventional row, FIG. 2 is a detailed view of the main part of the conventional example, and FIG. 3 is a detailed view of the main part of an embodiment of the present invention. 2... Tank, 3... Fuel, 4... Light wick, 5...
...Inner core cylinder, 6...Outer core cylinder, 7...Inner flame cylinder, 8...
Outer cylinder, 9...outer cylinder.

Claims (1)

[Scope of utility model registration request] A wick that sucks up fuel from the tank and vaporizes it; an inner and outer tube that holds the wick so that it can move up and down; and an inner and outer tube that has numerous pores placed on the fire pan at the top of the inner and outer tube. It includes a flame tube and an outer tube disposed to cover the inner and outer flame tubes, and a part of the outer flame tube has a vertical hole pitch that is denser than other pores.
A 4-row pore group zone is provided, and the pore diameter of this 4-row stomatal group zone is formed in series with small pores, large pores, small pores, and small pores from the bottom. The directional pitch is half the horizontal pitch of the pores above it in a wick-type oil combustion device.