JPH04106302A - Combustion device - Google Patents

Abstract

PURPOSE:To provide a combustion device making a stabilized balance between indoor air and surrounding air and capable of providing a superior stable combustion condition having a superior igniting characteristic by a method wherein air holes at an inner flame cylinder opposite to a middle stage flow restricting region are formed to have a larger opening rate than that of other regions. CONSTITUTION:This combustion device is constructed such that air holes 31 of an inner flame cylinder 6 opposing to a middle stage flow restricting region 27 are formed to have a larger opening rate than that of other regions. Accordingly, air from inside an inner flame cylinder 6 flows from air holes 24 into the middle stage flow restricting region 27, passes through the air holes 31 in the inner flame cylinder 6 and is supplied into a combustion chamber 8. However, the air holes 31 of the inner flame cylinder 6 opposing to the middle stage flow restricting region 27 are formed under a larger opening rate than that of other parts. Since a large amount of air is supplied through this part, a lack of air is improved and an air balance between the inner air and the surrounding air flowing from an inner part of the inner flame cylinder 6 and the outer part of the outer flame cylinder 7 is stabilized and then a superior and stable combustion state can be attained.

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 Conventionally, as this type of combustion device, there is a wick-type combustion device used in kerosene stoves and the like. This wick-type combustion device does not require a 100% power source like oil fan heaters, etc., and has the advantage of being easily portable as it does not require a power cord, but if you reduce the amount of combustion a little, CO
There was a problem that a large amount of combustion started to occur and the range for adjusting the combustion amount was narrow.

As a solution to this problem, the applicant has already proposed a combustion device as shown in FIG. 3, which allows a wide combustion amount adjustment range. This combustion device will be explained below.
In FIG. 3, reference numeral 1 denotes a lamp wick, which is set between an inner wick tube 2 and an outer wick tube 3 so as to be vertically movable. The upper ends of the inner core cylinder 2 and the outer core cylinder 3 are each connected to an inner fire pan 4. It forms an outer fire plate 5,
An inner flame tube 6 and an outer flame tube 7 are placed. The tip of the wick 1 is connected to the combustion chamber 8 formed between the inner flame tube 6 and the outer flame tube 7 during combustion.
The combustion vaporization takes place here. 9 is an outer cylinder, and 6 is an inner flame cylinder. Outer flame tube7. The outer cylinders 9 are arranged approximately concentrically from the inside and are integrated by a fixing pin 1o.

Reference numeral 11 indicates 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 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.

18 is a heat transmitting tube made of a heat transmitting material such as glass, and is placed on the outer tube 9. A top frame 19 is placed on the upper end of the red-hot part 16 so as to cover the upper end of the air passage 20 between the red-hot part 16 and the heat-transmitting cylinder 18, and fixes the heat-transmitting cylinder 18. Reference numeral 21 denotes a flow control tube installed inside the inner flame tube 6, which extends upward from near the position facing the tip of the wick 1 to near the tip of the inner flame tube 6, and has a control area 22 formed between the inner flame tubes 6. It is provided so that it is shielded by its bottom surface. 23
is the air introduction path.

Reference numeral 24 denotes communication holes provided in the middle and lower wall surfaces of the flow control cylinder 21, respectively. 25 is the control area 22 directly above the communication hole 24
It is a shielding part that divides the flow control area into a lower control area 26, a middle control area 27, and an upper control area 28, and is formed by applying beading, flaring, etc. to make the flow control cylinder 21 protrude toward the outer circumference. . 29 is the flow control tube 21 and the inner flame tube top plate 12
This is a ventilation section that is set to have a certain interval between the two. Reference numeral 30 denotes a non-porous portion provided in a portion of the inner flame tube 6 facing the communication hole 24 of the flow control tube 21.

In the above configuration, when the lamp wick 1 is ignited, combustion starts, and high-temperature combustion gas due to combustion rises in the combustion chamber 8, creating a thermal draft, and the air necessary for combustion flows into the inner flame tube 6. The air is supplied into the combustion chamber 8 through the air hole 11 of the outer flame tube 7 and the through hole 17 of the red-hot part 16, and combustion continues. At this time, the air supplied from inside the inner flame tube 6 is transferred to the flow control tube 2 as shown by the white arrow.
The air flow is divided into air that is supplied from below to the vicinity of the lamp wick 1 and air that ascends through the air introduction path 23. A part of the rising air passes through the communication hole 24 and is supplied to the combustion chamber 8.

Furthermore, the air supplied above the inner flame cylinder 6 is supplied to the combustion chamber 8 and above from the air hole 11 and the ventilation hole 13.

A portion also descends to the upper stage control region 28 and is also supplied to the combustion chamber 8 from the air holes 11 located relatively below.

- The energized fuel becomes a mixed gas with air and mainly rises in the combustion chamber 8 as shown by the black arrow. but,
Since the lower-stage control area 26, the middle-stage control area 27, and the upper-stage control area 28 have a negative pressure, a part of the mixed gas is transferred to the lower-stage control area 26.
Middle-level basin 27. Water will flow into the upper tier basin within two days. Therefore, the lower level system basin 26. Middle-level basin 27. Upper level basin 28
The interior is filled with unburned gas.

This unburnt gas is mixed with the air flow flowing in from the communication hole 249 and the ventilation portion 29, and is again supplied to the combustion chamber. Therefore, during strong twist firing with the wick 1 exposed high, unburnt gas and air are mixed well from near the upper end of the inner flame tube 6 into the combustion chamber 8.
Since it is supplied to the vicinity of the upper end, it is efficiently combusted in the vicinity of area A, and unburned gas that is not completely combusted here is combusted by the flame formed above.

Next, when the exposed height of the wick 1 is lowered to reduce the amount of combustion, the flame gradually descends into the combustion chamber 8. In this case, the flow of unburned gas is the same as in the case of strong twist firing. However, since the amount of vaporized gas is greatly reduced, the amount of unburned gas flowing into the upper control region 28 is also reduced. Therefore, the vicinity of region B becomes a good mixing region, a flame holding state is formed in this region, the wall surface of the inner flame tube 6 becomes red-hot, and the combustion is completed with the flame formed above it. In this case, most of the unburned gas that has flowed into the upper control area 28 is supplied into the combustion chamber 8 by the combustion air flow and is combusted by the flame. There are almost no combustion gas components, and the air discharged from the air holes 11 and 13 above the flame is clean, and the exhaust gas characteristics (Co/Co) do not deteriorate. The amount can be narrowed down, and the combustion amount can be widened while adjusting the combustion amount.

With this configuration, the pores 31 of the inner flame tube 6 facing the communication hole 24 of the flow control tube 21 are easily affected by changes in the amount of air flowing in from the ventilation hole 24 and the flow velocity, so flame holding is extremely difficult. However, this problem is solved by making the pores of the inner flame tube 6 facing the ventilation hole 24 non-porous 30. .

Problems to be Solved by the Invention However, in the above-mentioned conventional configuration, since the pores of the inner flame tube 6 facing the communication hole 24 are non-porous portions 30, the air flows from the communication hole 24 into the middle-stage control region 27, and then bends. At the same time, the amount of air that passes through the air holes 31 of the inner flame tube 6 and is supplied into the combustion chamber 8 is increased from the through hole 17 of the outer flame tube 7 in this part to the combustion chamber 8.
The problem was that the amount of air flowing into the combustion chamber was insufficient, the balance between the inside and outside air was disrupted, and the amount of air outside became excessive, resulting in unstable combustion conditions such as the generation of yellow flames due to diffuse combustion.

The present invention has been made in view of these points, and an object of the present invention is to provide a combustion device that stabilizes the internal and external air balance, has good combustion characteristics, and has a stable combustion state.

Means for Solving the Problems In order to solve the above-mentioned problems, in the combustion device of the present invention, the pores of the inner flame cylinder portion facing the intermediate control region are formed to have a larger aperture ratio than the other portions.

Effect The present invention has the above-described configuration, which increases the amount of air from the middle part of the inner flame cylinder facing the through-hole part of the outer flame cylinder, where most air flows from the outside located at the upper part of the constricted part of the outer cylinder. Since the lack of air inside is improved, the balance between inside and outside air is stabilized, resulting in a good and stable combustion condition.

Embodiment Hereinafter, an embodiment of the present invention will be described based on FIG. 1. Parts that are the same as those shown in FIG. 3 already explained are given the same reference numerals, and their explanation will be omitted, and only different parts will be explained. In other words, the pores 31 of the inner flame cylinder 6 facing the middle-stage control area 27 are formed with a larger aperture ratio than other parts.

In the above configuration, air from inside the inner flame fiJ6 flows into the middle-stage control area 27 through the ventilation hole 24, and then
The fuel passes through the air holes 31 and is supplied into the combustion chamber 8. However, the pores 31 of the inner flame cylinder 6 facing the middle-stage control area 27 are formed with a larger aperture ratio than other parts, and a large amount of air is supplied from this part, so the air shortage is improved, and the The internal and external air balance flowing into the combustion chamber 8 from the inside of the inner flame tube 6 and the outside of the outer flame tube 7 is stabilized, resulting in a good and stable combustion state. In addition, the through hole 17 of the outer flame tube 7 that faces the inner flame tube 6 is located above the constricted part 15 of the outer tube 6, and is the part where the most air from the outside flows in, so the effect is great. be.

In the above embodiment, the pores 31 of the inner flame cylinder 6 were made large, but
A similar effect can be obtained even if the pores 31 are made dense as shown in FIG.

Effects of the Invention As described above, according to the combustion apparatus of the present invention, not only the amount of combustion can be adjusted more widely, but also a stable combustion state is achieved without combustion noise, flame shaking, yellow flame generation, etc., and combustion is improved. It is possible to obtain a combustion device with great safety and practical comfort during volume control.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a main part of a combustion device according to an embodiment of the present invention, FIG. 2 is a sectional view of a main part of a combustion device according to another embodiment of the invention, and FIG. 3 is a sectional view of a main part of a combustion device according to a conventional example. It is a sectional view of the main part. 1...Light wick, 6...Inner flame cylinder, 7...
...Outer flame cylinder, 8... Combustion chamber, 9... Outer cylinder, 11... Air hole, 16... Red-hot part, 18... ...Heat transmission tube, 21...Flow control tube, 22...Control area, 24...Communication hole,
25...Shielding part, 27...Medium stage control area, 30...Inner flame tube non-porous part, 31...Inner flame tube air hole. Name of agent: Patent attorney Akira Okaji and two others

Claims (1)

[Claims] an outer flame tube consisting of a pore section having a large number of air holes and a red-hot section formed above the pore section, an inner flame tube having a large number of air holes disposed inside the outer flame tube, and the outer flame tube. an outer cylinder located outwardly, a heat transmitting cylinder placed above the outer cylinder, and a lamp wick vertically movable at the lower end of a combustion chamber formed between the outer flame cylinder and the inner flame cylinder. , a flow control tube disposed inside the inner flame tube, extending from near a position facing the lamp wick to near an upper end of the inner flame tube, and shielding a control area formed between the inner flame tube and the inner flame tube with a bottom surface; , a communication hole provided in two places in the vertical direction of the wall surface of the flow control cylinder, a shielding part that divides the control area into three stages, upper, middle, and lower, immediately above the communication hole, and a shielding part facing the communication hole. A combustion device in which the inner flame cylinder portion is formed as a non-porous portion, and the pores of the inner flame cylinder portion facing a middle control area of the control area are formed with a larger aperture ratio than other parts.