JPS58158411A - Kerosene burner - Google Patents

Abstract

PURPOSE:To increase a volume of secondary air supplied to a central part of the burner and prevent a spontaneous blowing-out of the inner flame of the burner by a method wherein a partition plate is arranged in a secondary air flow passage formed by an outer circumferential edge of the burner and a receptacle, and a reduced flow part is formed in the secondary air flow passage. CONSTITUTION:A kerosene burner is constructed such that a central secondary air supplying passage 23 is formed by a lower end wall 22 of a burner 1 and a receptacle 5, and a secondary air supplying hole 24 is formed in the receptacle 5 so as to be opened to the supplying passage 23. A partition plate 25 fitted to an outer circumferential wall 10 is arranged in the secondary air flow passage 8, and a reduced flow passage 26 is formed in the secondary air flow passage 8 by the partition plate 25 and the receptacle 5. Thereby, when the kerosene burner is combustioned, a flowing resistance of the secondary air to the secondary air flow passage 8 is increased by the reduced flow part 26, and in turn, a flowing resistance of secondary air to the secondary air hole 4 in the burner 1 is decreased. A volume of secondary air supplied to the central part of the burner 1 from the secondary air hole 4 is made to be sufficient one so as to prevent a spontaneous blowing-out of the inner flame 3.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a stove with a burner and a saucer having a plurality of flame holes and secondary air holes.

Conventionally, this type of stove is shown in Fig. 4, Conventional Example I, and Conventional Example ■.
The conventional example (1) is constructed as shown in FIG. 6, and the conventional example (2) is shown in FIG. In conventional example I, 1 is a burner, 2 is a main flame, 3 is an inner flame,
4 is a secondary air hole of the burner 1, 6 is a receiving plate 6 is a gap provided between the burner 1 and the receiving plate 6, 7 is a trivet, 8 is a secondary air flow path composed of the burner 1 and the receiving plate 6, and 9 is a covered plate. It is a heated material (hereinafter referred to as steel) and constitutes the combustion part of the stove.

The combustion state of this stove is shown when gas is used as fuel. The premixture of gas and air is supplied to the burner 1, forms a main flame 2 and an inner flame 3, and burns.

The pot 9 placed on the trivet 7 is heated to function as a stove. At this time, some of the air necessary for combustion is supplied as being contained in the premixture, and the remaining air is supplied from the secondary air holes 4 and the gap 6.

While burning and heating the pot 9 as described above, the pot 9
When the food in the pot boils, part i of the broth flows along the sides of the pot 8 and boils over into the saucer 6.

However, it has the disadvantage that all of the boiled broth does not spill into the saucer 6, but instead falls below the secondary air hole 4 and the gap 6, staining the stand on which the stove is placed. was.

Conventional examples (2) and (2) solve the drawbacks of conventional example I. Both of these conventional examples are used in the same way as the conventional example (2). In the conventional example (2), the configuration will be explained.

In the figure, 10 is a burner hole drilled in the saucer 5, 11 is a burner outer peripheral wall having a larger diameter than the burner hole 1o, and 13
1 is a mixing chamber formed between the outer peripheral wall 11 and the inner peripheral wall 12 of the burner, 14 is a flame hole communicating with the mixing chamber 13, and 15 is the inner peripheral wall 1.
A hollow interior surrounded by 2 and opened at the top, 16 is a saucer 6
A communication hole 17 is a shielding wall that shields the communication hole 16 from the mixing chamber 13, and constitutes a stove heating section.

In this case, as in Conventional Example I, the premixed air is supplied from the mixing chamber 13 to the flame hole 14 and burned. At this time, when the broth in the pot (not shown) boils over, the gap 6 of the conventional example I is covered by the burner outer peripheral wall 11, which has a diameter larger than the burner hole 1o, so that all the liquid in the saucer 6 is covered. Boil over.

It is used in the same way. Conventional example (2) will be explained with reference to FIG. In the drawings, parts that are the same as those in the conventional example are designated by the same numbers, and their explanations will be omitted.

In the figure, 18 is a mixing tube, which is divided into upper and lower parts by a 1°9 dividing section. Reference numeral 20 denotes a collar part erected at the periphery of the insertion hole of the saucer 6, which is covered and held by the dividing part 19, and is held by the dividing part 19.
are connected to form the stove combustion section.

In this case as well, it is used in the same manner as in the conventional example, and the premixed air is supplied from the mixing pipe 18 and combusted in the burner 1. At this time, the overboiled broth is removed from the insertion hole of the receiving surface 6 at the dividing part 1.
Since it is enclosed and clamped by 9, it can all be received in the saucer 6.

As described above, the drawbacks of conventional example I can be solved by conventional examples ■ and ■.
It was resolved. Let's take a look at the combustion conditions of the conventional examples (1) and (2).

In conventional example (■), the secondary air necessary for combustion is supplied through the communication hole
and is supplied from the secondary air passage 8 near the burner outer peripheral wall 11. At this time, the secondary air flowing through the communication hole 16 generates frictional resistance between the shielding wall 16 and the inner peripheral wall 11. This frictional resistance varies depending on the size of the flow path in the hollow interior 14 of the communicating hole 16 and the condition of each wall surface. The amount of secondary air supplied from the communication hole 16 is determined by the frictional resistance thus generated. The same applies to the amount of secondary air supplied from the secondary air flow path 8. As described above, the output 1
It is supplied to the center, center and outside of the area. These two types of secondary air are supplied by the draft force generated by combustion, and since the same draft force acts on the communication hole 16 and the secondary air flow path 8, they are the same if the frictional resistance is the same. However, when comparing the sizes of the communication hole 15 and the secondary air flow path 8, the secondary air flow path 8 is larger. Therefore, the amount of secondary air is larger in the secondary air flow path 8 than in the communication hole 16. In this way, if one resistance is small and the other is large, even if the same draft force acts, it will act only on the side with smaller resistance. Therefore, the amount of secondary air supplied to the center of the burner 1 in each flame hole 14 decreases, and combustion in the center becomes incomplete due to lack of air. In order to eliminate this incomplete combustion, measures have been taken such as increasing the size of the communicating holes to reduce the resistance. However, if the communication hole 16 is made larger, the mixing chamber 13 becomes smaller than the burner outer peripheral wall 1.
If the size of 1 is the same, it will be smaller. When the mixing chamber 13 becomes smaller, the frictional resistance of the premixture flowing inside the mixing chamber 13 becomes
As it increases, the amount of primary air sucked in by the mixing tube 18 decreases. Therefore, the amount of air in the premixture decreases, and combustion deteriorates.

However, if the mixing chamber 13 is enlarged in an attempt to overcome this drawback, the burner 1 as a whole becomes larger. If the burner 1 is large, when a small pot is placed on it, the sides of the pot will be heated, resulting in a disadvantage of low thermal efficiency. In addition, in pancakes and other items that require uniform heating, the center portion is not heated, resulting in uneven baking.

Similarly, in the conventional example (2), the central secondary air hole 4 and the outer peripheral portion of the burner 1 are formed in the same space. Therefore, the amount of secondary air supplied to the center of the burner 1 is small because the resistance to the secondary air holes 4 is greater than that at the outer periphery of the burner, similar to the previous example, and this has the same drawbacks as the conventional example (2). In order to eliminate this drawback, a measure was taken to increase the distance 1 between the saucer 6 and the burner 1, as shown in the figure. According to our experiments, this countermeasure cannot be effective unless l is set to 50 m or more, and even then it was found that this was not sufficient.

Moreover, this measure had the disadvantage that the entire combustion section of the stove became large.

The present invention eliminates the drawbacks by taking advantage of the conventional structure in which boiled broth is not spilled under the stove but is received in a saucer.

Controlling the size of the secondary air flow path of the stove combustion part and the flow path of the secondary air hole to control the amount of secondary air supplied to both,
This increases the amount of secondary air supplied from the secondary air hole to eliminate the drawbacks of the conventional system.

In order to achieve this object, the present invention provides a secondary air flow path constituted by the burner outer peripheral wall and the receiving plate, and a secondary partition plate that fits into the burner outer peripheral wall, and the secondary air flow path is configured by the partition plate and the receiving plate. A flow contraction part or a blocking part is provided in the flow path, a bar supply path is formed between the secondary air hole and the partition plate, and a secondary air supply hole is provided in the saucer that opens into the central secondary air supply path. in,
By providing a narrow part or a blocked part in the secondary air passage to increase the resistance to the secondary air passage compared to the secondary air hole, the draft force generated by combustion can be reduced.
A relatively large amount of effect was applied to the secondary air holes.

Therefore, the amount of secondary air supplied from the secondary air hole can be increased, and the drawbacks of the conventional system can be solved.

An embodiment of the present invention is shown in FIGS. 2 to 4 below. In addition, in the figures, the same parts as in FIGS. 4 to 6 are given the same numbers, and the explanations are omitted. In the figure, 21
is the central part of the burner 1, 22 is the lower wall of the burner 1, 23 is a central secondary air supply passage constituted by the saucer 6 and the lower end wall 22, 24 is provided in the saucer 6, and the central secondary air supply passage 2
3 is the primary air supply hole, and 26 is the burner outer peripheral wall 1.
A partition plate 26 fitted into the secondary air flow path 8 and provided in the secondary air flow path 8;
is a condenser section provided in the secondary air shortage 8 by the saucer 6 and the partition plate 26, and the stove combustion section is constructed.

Since the combustion state and usage at this time are the same as in the conventional example, the explanation will be omitted, and the relationship between the different supply of secondary air and combustion will be explained.

With the above configuration, the secondary air necessary for combustion is supplied from the gap 6, the secondary air supply hole 24, and the bottom part 7 by draft force. At this time, the amount of secondary air supplied to the burner 1 from the secondary air passage 8 can be controlled by providing a partition plate 26 in the secondary air passage 8 and partially narrowing the secondary air passage 8. Since the resistance to the secondary air flow path 8 is increased by the flow portion 26, the draft force applied to the secondary air flow path 8 is reduced. On the contrary, the resistance to the secondary air hole 4 is smaller than that to the secondary air flow path 8, and the resistance to the secondary air hole 4 is smaller than that to the secondary air flow path 8.
The amount of secondary air supplied increases. The amount of secondary air can be increased or decreased by changing the size of the contraction section 26. According to our experiments, it has been found that a sufficient amount of secondary air can be obtained if the size of the contraction section 26 (the gap between the partition plate 25 and the saucer 6) is 2 to 3 sea bream or more. Therefore, sufficient secondary air is supplied from the secondary air hole 4 to the center 21 of the burner 1, and the conventional drawback of the internal flame being extinguished due to incomplete combustion or lack of secondary air is eliminated.

In addition, the secondary air supply hole 24
is covered by the burner 1 and the partition plate 26,
As with conventional examples ■ and ■, there is no need to worry at all.

Another embodiment of the present invention is shown in FIG. 3. In the figure, parts that are the same as those of the conventional example and the present invention are given the same numbers, and their explanations will be omitted. The difference from the present invention described above is that the contraction section 26 of the present invention is completely blocked. With this configuration, the amount of secondary air supplied from the secondary air holes 4 increases because the resistance of the secondary air flow path 8 further increases, and the draft force increases. On the other hand, the secondary air to the secondary air flow path 8 is no longer supplied from the secondary air supply hole 24, and is supplied only from the butt 2 part.

According to our experiments, the secondary air flow path 8 from the butt 2f part
The condition for supplying the secondary air necessary for combustion is that the product of the total length of the circumference of the trivet (for example, for a square trivet with a side length of 181M, 18X4 = 72 cm) and the trivet height H is aoi It turned out to be ~300-. If the product of the total circumference of the trivet and the height H of the trivet is outside the above-mentioned range, a good combustion state cannot be obtained. This is because when the temperature is below the range (less than 80c!), the above-mentioned product is less than the area required for exhaust, and exhaust cannot be performed sufficiently, resulting in a state where the exhaust is suppressed and the draft force is reduced. It becomes ugly. Moreover, the secondary air supplied to the secondary air flow path 8 is no longer supplied because the outlet 2 is blocked by exhaust gas. Therefore, the amount of secondary air necessary for combustion cannot be obtained. On the other hand, when it is above the range (greater than 300), the secondary air flow path 8 is
Secondary air flows in this direction, lowering the draft. Therefore, the draft force acting on the secondary air holes 4 becomes smaller, and the amount of secondary air supplied to the secondary air holes 4 decreases. From the above, a good combustion state can be obtained by setting the temperature within the above range.

A partition plate fitted to the outer circumferential wall of the burner is provided in the secondary air flow path, and a constriction part or a blocking part is provided in the secondary air flow path by the partition plate and the saucer, and a The lower end wall of the burner and the saucer constitute a central secondary air supply passage, and the saucer is provided with a central secondary air supply and the passage is provided with a secondary air supply hole. The amount of secondary air supplied to increases. Therefore, the lack of secondary air in the center of the burner is eliminated, and incomplete combustion due to lack of secondary air and the accompanying generation of carbon monoxide are eliminated.

Furthermore, by supplying sufficient secondary air, the inner flame will not be extinguished due to lack of air, and the uniform heating of the pot, etc. will be improved. Furthermore, since there is only one saucer, it is possible to provide a stove that requires less effort to clean the saucer.

[Brief explanation of drawings]

Fig. 1 is a sectional view of the combustion part of a stove showing seven embodiments of the present invention, Fig. 2 is a perspective view of the main part of Fig. 1, and Fig. 3 is a sectional view of the combustion part of a stove showing another embodiment of the invention. Figure 4 is a cross-sectional view of the combustion part of the stove of conventional example ■, Figure 6 is a cross-sectional view of the combustion part of the stove of conventional example ■, and Figure 6 is a cross-section of the combustion part of the stove of conventional example ■. It is a diagram. 1...Burner, 4...Secondary air hole, 5
...Saucer, 8...Secondary air flow path, 1o
・・・・・・ノ(-outer peripheral wall, 13...flame hole,
22...) (-lower end wall, 23-゛...)
Central secondary air supply path, 24...Secondary air supply hole, 26...Partition plate, 26... Contraction part, 27... Blocking part . Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2rgJ 113 Figure

Claims (1)

[Claims] A plurality of flame holes are arranged on the circumference, and the burner has a secondary air hole provided at the center of the circumference or between the center and the circular hole, and a saucer is provided below the secondary air hole, and the burner A partition υ plate fitted to the burner outer peripheral wall is provided in the secondary air flow path constituted by the burner outer peripheral wall and the receiver plate, and a condenser part or Provide a blocking section,
A central secondary air supply path is formed between the secondary air hole and the partition plate by the burner lower end wall of the burner and the tray, and the tray is open to the central secondary air supply path or the secondary air flow path. A stove with a secondary air supply hole.