JPH0132890B2 - - Google Patents

Description

[Detailed description of the invention] Industrial applications The present invention relates to a cooking stove.

Conventional structure and its problems As shown in Fig. 1, the conventional stove has a sufficient gap 3 between the burner 1 and the saucer 2, and also has a through hole 4 in the center of the burner 1. Sufficient combustion air is provided from below the saucer 2. However, in this case, when boiling over occurs, the boiling liquid falls into the lower part of the saucer 2 through the air gap 3 and the through hole 4 in the center of the burner, staining the equipment and the surrounding area. This has become the biggest complaint against stoves, and recently many methods have been proposed to prevent the broth from falling below the saucer. However, the ones that have been put into practical use are ones that do not have a central hole in the burner, as seen in foreign products, or ones that only close the gap between the saucer and the burner, and the former is not suitable for Japanese cooking conditions, and the latter has improved some of the stains caused by boiling liquid. However, it is not enough. In other words, there is a need for something that does not allow the broth to fall below the saucer and that also has internal flames. For this reason, we have proposed a so-called clean type stove, which has a structure in which a saucer 2 is placed below the central hole 4 of the burner 1, as shown in FIG. 2, so that the broth does not fall below the saucer. However, in this case, the saucer 2 becomes very deep, which not only poses problems in workability, but also requires adjustment of the balance of supply of secondary air to the inner and outer peripheries of the burner, which tends to worsen combustion. In particular, because the supply of secondary air to the outer periphery of the burner takes a route in which it goes around from above along the saucer and downwards, the saucer must be made larger than necessary, resulting in deterioration of combustibility and the inability to sufficiently increase thermal efficiency. Ta.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned problems, and aims to improve combustion performance and thermal efficiency in a clean burner.In order to achieve the above-mentioned objects, the present invention provides inner peripheral air holes in the top plate. A trivet consisting of a saucer, a frame-shaped base, and a plurality of claws provided on the base is placed, and a burner having a central air vent is disposed in the center between the saucer and the trivet, The burner is disposed at a lower level than the base of the trivet, and is attached to the outer periphery of the burner so as to cover an inner air hole provided in the saucer to form a secondary air passage for the inner circumference with the saucer. A juice receiving cap is disposed substantially closely to the saucer, and a hole for secondary air is provided below the trivet and in a top plate portion between the saucer and the top plate, covered with a gap by the base of the trivet. It is a stove. Therefore, by preventing the boiling liquid from falling under the saucer, and by effectively supplying secondary air to the burner flame, good combustibility is ensured, and the exhaust passage and air supply passage are separated. This increases thermal efficiency by lowering the temperature.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG.

Reference numeral 5 designates a burner burner, which has a central air vent 6 on its inner periphery and tooth grooves forming a main flame hole 7 on its outer periphery, and a burner cap 9 having a hole 8 between the main flame holes 7 near the center hole 6. , a burner head 10 on which the burner cap 9 is placed, a mixing pipe 11 connected to the head 10, and a nozzle (not shown). The burner head 10 has a juice-capturing portion 13 on which a juice-capturing cap 12 is placed, which is provided at the lower part of the main flame hole 7 formed with the burner cap 9, and an umbrella portion 14 provided at the lower part of the sump-cap receiving portion 13. It is disposed downward with a gap from the bottom, passes through the through hole 16 of the saucer 15, and communicates with the mixing pipe 11. The umbrella portion 14 has a larger diameter than the through hole 16 and is formed to prevent the broth from falling. Reference numeral 17 denotes an inner peripheral air port for supplying secondary air for the inner flame hole to the burner center passage hole 6 provided in the saucer 15, and
It is arranged on the circumferential side of 2 so as to avoid directly below the central through hole 6, and is configured to prevent the broth from falling. The saucer cap 12 not only prevents boiling liquid from entering the inner flame air hole 17, but also provides an independent secondary air passage from the inner circumferential air hole 17 to the central through hole 6 to the inner circumference of the burner between the saucer cap 12 and the saucer 15. The purpose is to form a gap A between the outer periphery of the juice receiving cap 12 and the saucer 15 (Fig. 4).
is not desirable or is set within 5 mm at most. This gap is designed to prevent the broth that has fallen into the central through hole 6 from remaining only in the portion of the saucer 15 surrounded by the saucer cap 12, and if the saucer has a sufficient capacity to accommodate the dripping liquid, the gap is unnecessary.

Reference numeral 18 denotes a saucer receiving part, which is located at a lower level than the top plate 19 as a stove top part, and has a top plate part whose inner circumferential side, which houses the burner 5, is inclined 20, and supplies secondary air to the outer circumference of the burner in the middle thereof. multiple pores 2
1 is installed. 22 is a trivet consisting of a frame-shaped base 23 and claws 22a that protrude upward from the base 23 to receive the pot 26, etc. The base 23 is placed on the top plate 19, and the base 23 has a gap from above to the air hole 21. There is also a gap 24 between the cover and the saucer 15.
The inner periphery 25 of the base is formed so as to form a base inner periphery 25, and the upper surface 23a of the base 23 is positioned at least above the burner 5. 26 indicates a pot.

The lower part of the inner periphery of the trivet base 25 is inclined in the inner circumferential direction to limit the burner outer peripheral space, and is formed sufficiently below the flame hole 7.

In the above configuration, gas fuel is supplied and ignited and combusted. Part of the combustion air is premixed and supplied as a premixture (primary air) in the mixing pipe 11, and the secondary air to the inner periphery of the burner is supplied to the inner periphery air 17 of the saucer 15.
Therefore, secondary air is supplied to the outer periphery of the burner through the pores 21 provided in the inclined portion 20 of the top plate 19, and combustion occurs. The secondary air from the air hole 21 is supplied to the inner periphery 25 of the trivet base as a downward flow through the gap 24, and then to the liquid receiving cap 12 and supplied to the outer periphery of the burner. This supply force is generated by the draft of the combustion flame and is proportional to the difference in height between the main flame hole 7, inner flame hole 8, and the upper end of the surrounding wall surface (in this example, the upper surface of the trivet base 23). The effect will be higher. Therefore, in this example, it is necessary to set the required area of the air hole 21 in accordance with the difference in height between the flame hole 7 and the trivet base. If the area of the pores 21 is too large, the combustibility will improve, but the thermal efficiency will decrease due to excess air, and if the area is too small, poor combustion will occur.

A similar draft is also applied to the central air vent 6, and secondary air is supplied to the inner periphery of the burner flame from the inner periphery air port 17. At this time, if the inner circumferential air passage is not separated from the air passage to the burner outer circumference by the liquid receiving cap 12, the burner outer circumference passage area will be overwhelmingly larger than the inner circumference side passage area (corresponding to the central air vent 6). Because of the large size, most of the air in the inner circumferential air port 17 flows toward the outer circumferential side due to the resistance balance of the passage, resulting in a shortage of air on the inner circumferential side. Therefore, in the present invention, by making the juice receiving cap 12 substantially independent from the outer passage, sufficient inner circumferential air is provided, and unnecessary outer circumferential air is reduced, thereby ensuring good combustion.

In addition, by slanting the lower part of the trivet base 25 below the flame hole 7 and toward the inner circumference, the flow of secondary air around the burner is controlled to flow along the flame, and the space around the burner is restricted.

Here, if the flame hole is located above the trivet base 23, the draft will be applied above the trivet base and the claw 2
Air is also sucked from between the holes 2a, and the amount of air sucked from the pores 21 is reduced, which reduces the supply of air to the burner section, worsens combustion, and requires a wide saucer.

The exhaust gas hits the pot 26 and is discharged from an exhaust passage formed between the trivet base 23 and the pot 26. Conventionally, this exhaust passage required sufficient height (20 to 30 mm) because intake and exhaust were performed at the same time. However, in this example, about 10 to 15 mm is sufficient, and the pot 26 can be brought closer to the burner 5, making it possible to greatly improve thermal efficiency.

On the other hand, since the saucer is a clean type, the following considerations must be made regarding the structure of the saucer.

The saucer 15 is currently made of stainless steel that has been drawn to a depth of about 15 to 20 mm;
Exceeding this is difficult in terms of processing and cost. However, in a clean type stove where the burner is arranged between the saucer and the trivet as in the present invention, the gap between the burner head and the saucer must be around 10 mm or more, and the thickness of the burner itself must be at least 20 to 30 mm (larger is preferable). In order to obtain good performance, it is preferable that the combined distance of the former two is approximately 35 mm or more, although this will vary depending on the burner part wall thickness and configuration, and the required liquid receiving capacity of the saucer. On the other hand, from the standpoint of combustibility, it is desirable to sink the burner into a recess that includes the trivet. From these, the saucer part is
A depth of about 30 to 40 mm is required, making processing difficult and expensive. The present invention makes the above possible with the same technology and cost as the conventional one by dividing this into two parts, a saucer and a top plate, and assembling them.

By the way, if the broth spills due to boiling, the broth that falls from the burner center hole 6 will remain in the saucer 15.
In addition, the boiling liquid on the outer periphery of the burner is transferred from the liquid receiving cap 12 to the saucer 15, and the broth spilled onto the trivet 22 is received by the trivet base 23 on the saucer 15 or the top plate 19, and does not fall to the lower part. After use, if you remove the trivet 22, juice cap 12, and burner head 10 in sequence, you can also remove the saucer 15 and wash the saucer 15 and wipe the top plate as usual.

It should be noted that the pores 21 do not necessarily have to be sloped portions, and may be located at any position where the purpose can be achieved.

Effects of the Invention As described above, according to the stove of the present invention, a burner having a central air vent is disposed between the saucer and the trivet as described above, and in a clean type stove, the inner circumference of the burner is By forming the secondary air passages substantially independently, it is possible to supply sufficient secondary air to the inner periphery of the burner.

2 By supplying secondary air to the outer circumference of the burner from below the trivet, one side of the combustion exhaust gas is discharged from between the claws of the trivet, and as a result, the exhaust passage and air supply passage are completely separated, and the height of the trivet is reduced. All that was needed was to secure the exhaust area, and the height could be lowered, resulting in a significant improvement in thermal efficiency.

3 Moreover, by covering the outer circumferential secondary air hole with a trivet, the broth does not fall to the lower part of the saucer, and the flow and amount of supplied air can be easily controlled.

4. By arranging the burner at a lower position than the trivet base, a draft is effectively provided to the combustion section, promoting the above effect.

As described above, it has become possible to provide a stove with high thermal efficiency that satisfactorily satisfies the two objectives of preventing contamination from boiling liquid and ensuring combustibility.

[Brief explanation of drawings]

FIG. 1 is a conceptual diagram of a conventional commonly used stove, FIG. 2 is a cross-sectional view of a main part of a conventional clean type stove, and FIG. 3 is a cross-sectional view of a main part of a stove that is an embodiment of the present invention. FIG. 4 is an enlarged sectional view of the same main part. 5...Burner, 6...Central air vent, 12...
Juice receiving cap, 15...Saucer, 17...Inner circumference air vent, 18...Saucer receiving part, 19...Top plate, 20
... Formation surface, 21 ... Secondary air hole (outer periphery), 22
... trivet, 23... trivet base, 24... gap,
A... Gap (juice receiving cap and saucer).

Claims (1)

[Scope of Claims] 1. A trivet consisting of a saucer having inner peripheral air holes, a frame-shaped base, and a plurality of claws provided on the base is placed on a top plate, and a trivet is placed between the saucer and the trivet. A burner having a central air vent is disposed, the burner is placed lower than the base of the trivet, and the burner is attached to the outer periphery of the burner so as to cover an inner circumferential air hole provided in the saucer, so that the burner A juice receiving cap forming an inner circumferential secondary air passage between the two is arranged substantially closely to the saucer,
A stove, wherein a hole for secondary air is provided below the trivet and in a top plate portion between the saucer and the top plate and covered with a gap by the base of the trivet. 2. The stove as claimed in claim 1, wherein the gap between the soup receiving cap and the saucer is 5 mm or less to form an inner peripheral air passage. 3. A saucer receiving portion of the top plate is formed at a lower level than the top surface of the top plate, and a plurality of air holes are bored between the receiving portion, which is a forming surface, and an end of the top surface of the top plate, and the holes are defined as the outer peripheral secondary air holes. 2. The stove according to claim 1, wherein the trivet base portion covers the trivet base portion from above with a gap therebetween.