JPS61149730A - Cooking stove - Google Patents

Abstract

PURPOSE:To enable a complete combustion to be performed with a less volume of secondary air by a method wherein a plurality of projections are arranged in response to either the interrupted portion or the small flame holes at the upper surface between the air holes of the burner cap having air holes at the central part and the flame holes. CONSTITUTION:A through-pass hole 3 is arranged at a central part of a burner 8, a clearance 19 is formed between the lower and part 18 in a protection cylinder 5 and the upper surface 4 of the burner cap 1 in order to supply the secondary air to the space 13. At this time, the secondary air may act as a shielding item due to a division of the clearance 19 with the projection 14 and the air may not flow to the rear part of the projection 14 at the most. Due to this fact, a quite small flame hole or the like for use in transferring flame is arranged at the interrupted part 20 having no flame hole 2 at the rear part of the projection 14 or between the flame holes 2 and a combustion volume at this location is kept low, the lack of secondary air is produced, the flame may not be extended and CO is not discharged and thus a complete combustion can be attained.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention is a burner for a stove, in which a temperature sensor is arranged in the air hole in the center of the burner, and a protective tube is provided around the temperature sensor to block heat from the burner. This invention relates to a stove with a burner that allows smooth supply of secondary air from the combustion chamber to the combustion section.

BACKGROUND OF THE INVENTION As shown in FIG. 5, burner caps used in conventional stoves of this type include a burner cap 1, a plurality of tooth-shaped flame holes provided around the burner cap 1, and 3
is a through hole provided in the center of the burner cap 1, 4 is the upper surface of the burner cap 1, and 5 is a protective cylinder placed on the upper surface 4, which is partially inserted into the through hole 3 and fixed to the burner cap 1. It consists of secondary air holes provided in the cylindrical surface of the protective cylinder 5, and this burner cap 1 was used in a stove with a temperature sensor. (For example, JP-A-55-28
In addition, in the burner cap of a commonly used stove, a plurality of flame holes are arranged intermittently at several places or are made into small flame holes with a small area, corresponding to the protruding claws of the trivet, and the flame The flame formed in the mouth does not touch the protruding claws. (For example, Utility Model Publication No. 134148/1983) Problems to be Solved by the Invention However, with the above configuration, the burner cap 1
When used as a burner for a stove, the situation when boiling over from a pot, etc. that is placed on the stove and heated is as follows.
The boiling liquid etc. that has boiled over on the upper surface 4 does not flow into the through hole 3 but accumulates on the upper surface 4. Since the burner cap 1 is at a high temperature, the broth solidifies on the upper surface 4. The solidified material increases as it is used, and finally from the secondary air hole 6 to the through hole 3.
The boiling liquid etc. flows into the container, and then similarly solidifies in the secondary air holes 6. Therefore, the secondary air that should be supplied from the secondary air holes 6 is no longer supplied, and there is a shortage of secondary air necessary for combustion, resulting in incomplete combustion. In addition, when the secondary air hole 6 is blocked, the boiling liquid also flows to the side of the flame hole 2 provided around it, and the flame hole 2 becomes clogged with the boiling liquid, and the flame hole 2 that was originally set becomes smaller. (The area of the flame hole 2 becomes smaller.) Therefore, the amount of combustion per flame hole changes and there is a problem that good combustion cannot be obtained. Furthermore, when making the protective cylinder 5 and molding it from a pipe, a drawing process is used to reach the size of the through hole 3. On the other hand, when it is made from sheet metal, the cylindrical end face must be fixed by welding or caulking, which increases the processing steps and increases the cost.

In addition, the conventional technology that makes the area of the flame hole corresponding to the protruding claw of the trivet smaller than the area of other flame holes has been developed by providing secondary air between the flame hole and the through hole provided in the center of the burner. There is no suggestion that a .

The present invention solves this conventional problem by preventing the secondary air hole formed by the protective tube provided on the top surface of the burner cap from being blocked by boiling liquid, etc., and maintaining the function of the protective tube. The purpose of this is to secure secondary air supplied to the combustion section and to smoothly supply secondary air to the flame to prevent abnormal combustion.

Means for Solving the Problems In order to solve the above problems, the stove of the present invention has a plurality of flame holes arranged around the outer periphery with interrupted portions or small flame hole portions provided at a plurality of places, and air in the center. A plurality of protrusions are provided on the upper surface between the air holes and the flame holes of the burner cap, which has holes, corresponding to the interrupted parts or small flame holes. It is equipped with a burner made up of a protective tube with a gap.

Function According to the present invention, with the above-described configuration, the secondary air to the flame formed in the flame hole of the burner cap is combusted by being supplied with secondary air from both the outer circumference and the inner circumference of the flame. At this time, the secondary air from the inner circumferential side is supplied from the secondary air hole provided in the center of the burner cap, and then flows through the gap formed between the top surface of the burner cap and the protective tube to reach the flame. . This secondary air is blocked by the convex part provided on the top surface of the burner cap to create a gap, making it difficult for it to flow behind the convex part. A small flame hole with a smaller area than the hole is provided to reduce the amount of combustion with either no flame or a small flame, so complete combustion can be achieved with a small amount of secondary air. In addition, since there is no part where boiling liquid or the like accumulates on the top surface of the burner cap, the gap is not blocked by boiling liquid, so that good combustion can be maintained. Further, the convex portion can be easily obtained by forging, casting, etc. of the burner cap, and the protective tube can also be obtained only by cutting the pipe, and then both can be easily obtained by caulking, press-fitting, etc.

Embodiments Hereinafter, embodiments of the present invention will be described based on the accompanying drawings. Note that parts having the same functions as those of the conventional example are given the same numbers, and explanations thereof will be omitted.

In Figures 1 to 4, 7 is the burner cap 1 on the top.
The burner 8 is composed of a burner body on which the burner 8 is placed. 9 is a trivet for placing and holding the heated object 10 at a predetermined distance from the burner 8; 11 is a through hole 3 of the burner 8 and a protection tube 5;
A temperature sensor 12 is inserted into the interior and has its tip in contact with the bottom surface of the object to be heated 10; 12 is a flame formed in the flame hole 2 of the burner 8;
13 is a space formed between the combustion flame 12 and the protective cylinder 5; 14
is a plurality of protrusions provided on the upper surface 4 of the burner cap 1,
The convex portion 14 is composed of a convex portion 15 and a stepped portion 16. 17
18 is a groove provided all around the outer peripheral surface of the protection tube 5, and 18 is a lower end portion of the protection tube 5, which is placed on the stepped portion 16 of the burner cap 1. The burner cap 1 and the protective cylinder 5 are integrated by cramming the protrusion 15 toward the groove 17 so that the protrusion 15 fits into the groove 17 and is fixed. Reference numeral 19 indicates a gap formed between the upper surface 4 of the burner cap 1 and the lower end 18 of the protection pipe 5 when the burner cap 1 and the protection pipe are integrated, and 20 indicates a gap between the flame hole 2 arranged on the outer periphery of the burner cap 1. At the interrupted portion, the interrupted portion 20 is in a state of blocking the flame hole arranged therein, and is configured so that the flame hole 2 is not provided in the place where the flame hole 2 should normally be provided. 21 is the protruding claw of the trivet 9, which constitutes the stove.

In the above configuration, when fuel is supplied to the burner 8, the stove forms a flame 12 and starts combustion.

At this time, the object to be heated 10 on the trivet 9 is heated. If the stove is equipped with a function of sensing the temperature of the object to be heated 10 by the temperature sensor 11 and controlling the fuel supply based on the signal from the temperature sensor 11, for example, the fuel supply will be controlled. That is, the temperature of the heated object 10 is maintained constant by repeating ignition and extinguishing at the temperature of the heated object 10. At this time, the protection tube 5 protects the temperature sensor 11 from the radiant heat of the flame 12 so that the temperature sensor 11 is not heated by the radiant heat of the flame 12 and receives heat from sources other than the object to be heated. On the other hand, in order to maintain the flame 12 in a good condition, it is necessary to supply secondary air as combustion air. Therefore, the through hole 3 must be provided in the center of the burner 8 to supply secondary air to the flame 12 toward the center of the burner 8, that is, to the space 13. In order to supply secondary air to the space 13, a gap 19 is formed between the lower end 18 of the protection cylinder 5 and the upper surface 4 of the burner cap 1.

At this time, since the protrusions 14 divide the gap 19, the secondary air acts as a shield and hardly flows to the rear of the protrusions 14. Therefore, if the flame hole 2 is arranged in the rear part of the convex part 14, there is almost no supply of secondary air from the space 13 side to the flame 12 formed in the flame hole 2 in this part. Next, in order to cause air shortage, the flame hole 2 behind the convex part 14
By providing an intermittent part 20 or a very small flame hole for flame transfer between the flame holes 2 to reduce the amount of combustion in this area, a lack of secondary air will occur and the flame will last longer. It has the effect of achieving complete combustion without stretching or emitting C○. Furthermore, when the burner cap 1 is made by casting or forging, the protruding portion 14 and the interrupted portion 20 are
are molded at the same time to obtain the dimensional and positional relationship, and there is no need for machining for separate construction.In addition, the integration of the protective tube 5 and the burner cap 1 allows the protrusion 15 to be plastically moved toward the groove 17 side. This effect can be easily obtained by a caulking operation in which a part of the convex portion 15 is deformed to fit into the groove 17, and at the same time, the gap 19 can be easily obtained.

Effects of the Invention As described above, the stove using the burner of the present invention provides the following effects.

(1) The burner cap has flame holes in several places on its outer periphery with interrupted parts or small flame holes, and the upper surface between the air holes and the flame holes has an air hole in the center. Several protrusions are provided corresponding to the flame hole, and the protrusion is held and fixed by the protrusion, and it has a protective tube with a gap between it and the top surface, so when burning in the flame hole. , the secondary air supplied to the flame is blocked by the protrusion, and the flame behind the protrusion does not suffer from a lack of secondary air, so the flame does not extend only to the rear of the protrusion, and CO is emitted. This has the effect of not causing problems such as

@) Conventionally, when creating a protective cylinder using sheet metal or pipe processing, it was necessary to roll the sheet metal to form a cylinder, and then weld or caulk to connect the end faces.
In addition, the process of drawing a portion to the size of the through hole can be replaced by, for example, simply cutting the pipe to construct the protective tube, which has the effect of reducing manufacturing costs.

(3) There is no accumulation of boiling liquid from the object to be heated on the top surface of the burner cap in the gap formed between the top surface of the burner cap and the protection cylinder, so the gap will not be blocked by boiled liquid and become blocked. Secondary air is supplied to maintain good combustion. .

(4) Since the protection tube blocks radiant heat from the flame, the temperature sensor can accurately detect the temperature of the object to be heated, and therefore, accurate temperature control is possible.

[Brief explanation of the drawing]

Fig. 1 is a side view of the overall configuration of a stove in one embodiment of the present invention, Fig. 2 is a plan view of a burner cap used in the stove, and Fig. 3 is a B of the burner cap in Fig. 2.
-0-B cross-sectional view, 41st! r is the back side of the same burner cap, and FIG. 5 is a sectional view of a conventional example. 1... Burner cap, 2... Flame hole,
3...Through hole, 4...Top surface, 5...
...Protective tube, 14... Convex part, 19...
...Gap, 20... Intermittent part. Name of agent: Patent attorney Toshi Nakao (only 1 person!)・
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Claims (1)

[Claims] A burner cap is provided with a plurality of flame holes on the outer periphery with interrupted portions or small flame hole portions provided at a plurality of locations, and an air hole is arranged in the center, and the burner cap is provided with the flame hole on the upper surface between the air holes and the flame hole. A burner comprising a protective cylinder provided with a plurality of protrusions corresponding to the interrupted parts or small flame hole parts, held and fixed by the protrusions, and provided with a gap between the burner and the upper surface.