JPH0227301Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a gas burner using a gas cylinder or city gas, and particularly relates to a gas stove having an annular gas burner.

(Prior art) This type of gas stove was developed, for example, in the
As is known from the publication, it is used in a grilling device for roasting meat, etc., and the burner head is positioned around the space directly below the grilled food to catch fat dripping from the grilled food and burn it. There isn't. However, in the past, the burner head was generally simply installed in the combustion chamber in an annular shape, and in the above-mentioned known example, the burner installation part of the combustion chamber was used as a closed space to prevent the flame from blowing up sideways. There is.

(Problem to be solved by the invention) In the conventional burner head of the general type, which is simply installed in an annular shape, heat convection occurs freely in the combustion chamber in which it is installed, so flame is generated in the combustion chamber. Due to the formal nature of the system, the entire combustion chamber is heated to a high temperature,
The burner head itself becomes hot due to the high-temperature air, which lowers the intake rate of primary air, resulting in incomplete combustion of what is called a yellow chip state, and the combustion efficiency decreases. This is remarkable in the case of the above-mentioned known example in which the burner installation space is a closed space.

Also, in conventional burner heads, an air current is generated that passes through the space it surrounds from below to above, and this air current blows up the sideways flame from the burner head, causing the tip of the flame to point considerably upward. For this reason, the influence of the flame on the grilled food becomes great, and the degree of scorching on the outside of the grilled food increases compared to the internal finish of the roasted food, making it difficult to successfully cook the grilled food. To solve this problem, it is necessary to increase the height from the flame hole of the burner head to the pottery placement section, which leads to an increase in the size of the appliance and reduces thermal efficiency in low-fire conditions.

Therefore, the present invention improves the structure of the burner head and the relationship between it and the stove body.
It is an object of the present invention to provide a gas stove that can solve the above-mentioned conventional problems.

(Means for solving the problems) In order to achieve the above problems, the present invention
The stove body has an annular burner head with horizontal flame holes arranged on the inner periphery, and this burner head is located below the flame hole to restrict ventilation from below in the space surrounded by the burner head. A secondary air supply port is provided between the burner head of the stove body and the opening edge of the cover that covers it, which is closer to the upper part of the inner periphery of the burner head. This device is characterized by an air intake port provided around the burner head accommodating portion.

(Function) Since the annular burner head moderately prevents air from blowing upward from the bottom of the space it surrounds, the ventilation restriction cover prevents horizontal flames from flowing from the horizontal flame holes provided on the inner periphery of the burner head. It is possible to prevent combustion heat from being blown up, and to trap the combustion heat in the space surrounded by the burner head to form a uniform layer of hot air for cooking. In addition, outside air enters from the intake port provided around the burner head accommodating part of the stove body, and the upper surface of the burner head of the stove body and the upper inner periphery of the burner head of the cover that covers it are from above or close to the upper surface of the burner head. Since the secondary air flows sideways from the annular secondary air supply port between the opening edge and the upper surface of the annular burner head toward its center, it suppresses the sideways flame from the flame hole on the inner periphery of the burner head and provides enough air to fill it. By supplying sufficient secondary air, complete combustion can be achieved while preventing the sideways flame from blowing up. Also, the flowing outside air cools the burner head from around the outside, suppressing the rise in temperature of the burner head, and It is possible to prevent the occurrence of the yellow chip phenomenon in which incomplete combustion occurs due to insufficient suction of primary air due to the high temperature of the head.

(Example) Example 1 (Figures 1 to 3) As shown in Figure 1, the burner head 1 has an annular closed ring shape, and a mixing pipe 2 is installed on a part of the lower surface of the head 1. is connected. The burner head 1 is mounted on a main body 1a having a U-shaped cross section by removably fitting 3 a top plate 1b, and has a large number of horizontal flame holes 4 between the inner periphery abutting portions of the main body 1a and the top plate 1b. is forming. The mixing tube 2 is connected to a portion of the bottom of the main body 1a via a seal packing 5, as shown in FIGS. 2 and 3. The main body 1a and the mixing tube 2 are both die-cast products, and the gas burner 12 is formed by the connection described above. Main body 1
A small flange 1c is formed on the inner periphery of the bottom of the burner head 1, and a ventilation restriction cover 7 for a space 6 surrounded by the burner head 1 is removably mounted on this flange 1c.

The ventilation restriction lid 7 has a dish shape with an upper outward flange 7a received by a flange 1c, has a depth that can be filled with water as well as a liquid receptacle, and is provided with a handle 7b.

This burner 12 with a lid is incorporated into a flattener body 9 of a simple gas stove which is used by loading a gas cylinder 8 as shown in FIGS. 2 and 3.
The container body 9 is a cylinder chamber 9a that accommodates and sets the cylinder 8.
and a combustion chamber 9b equipped with a burner 12 are formed adjacent to each other. A combustion chamber cover 11 with a trivet 10 is removably fitted into an upper opening 9c of the combustion chamber 9b, and a burner 12 is housed under the cover 11.
The burner 12 is fixed on the bottom of the combustion chamber 9b by legs 12a integrally formed in several places, and is fixed in position by fitting the positioning pin 12b at the lower end of the leg 12a into the small hole 9d at the bottom of the combustion chamber 9b. It is made to be stable. Note that one leg 12a
A screw 14 is fixed to the bottom of the combustion chamber 9ba to prevent the burner 12 from accidentally falling off and to ensure safe handling of the portable stove body 9. A secondary air intake 9 is provided at a suitable location in the combustion chamber 9b.
e is arranged.

The combustion chamber cover 11 is provided with an opening edge 11a that approaches the upper part of the inner periphery of the burner 12 from above, and forms an annular secondary air supply port 29 between the opening edge 11a and the upper surface of the burner 12.

The cylinder chamber 9a is provided with an opening/closing lid 16 whose lower edge is hinged 15 at its opening 9f, and a cock governor unit 17 is attached to the bottom of the front side of the container body 9. The unit 17 is provided with a cylinder connection mechanism 18 for the cylinder connection port 17a of the governor part, and a gas supply nozzle 19 protruding from the cylinder part is connected to the gas receiving end 2a of the burner 2.
20 is a control lever of the cylinder connection mechanism 18, and 21 is a control knob of the unit 17. 22 is an automatic ignition mechanism attached to the cock of the unit 17, and 22a is its spark plug. 1d is an ignition slit provided on the inner periphery of the burner head body 1a.

The trivet 10 is provided so as to be located on a diagonal line of a rectangular plane of the combustion chamber 9b, and a windshield wall 23 is mounted on the trivet 10, which can be removably received by fitting the lower end notch 23a, and can be used as necessary. I try to do that. A grilling net 24 is detachably attached to the upper edge step 23b of the windshield wall 23, and can be used as needed. The notches 23a are located at equidistant positions on the circumference of the windshield wall 23 with respect to the trivets 10 which are not equidistant on the circumference, and have a notch width t ₂ wider than the trivet width t ₁ . Regardless of the orientation of the notch 23, the notch 23a and the trivet 10 are fitted together in the circumferential direction without play, allowing stable use.

The burner head 1 is located under the combustion chamber cover 11, is not directly under the food to be cooked placed on the trivet 10 or the windshield wall 23, and is not exposed to dripping juices or fat from the food. You can use it like a regular pottery by putting it on.

In particular, the ventilation restriction lid 7 closes off the space 6 surrounded by the annular burner head 1 at the bottom of the burner head 1, as shown in Figs. It is possible to prevent air from escaping from below to above, and to prevent the sideways flame from blowing up from the sideways flame holes 4 on the inner periphery of the annular burner head 1. In addition, since the upward airflow occurs in the combustion chamber 9b, outside air is sucked in, but this outside air is sucked in from the secondary air intake port 9e around the combustion chamber 9b, and then from the annular secondary air supply port 29 to the burner head 1. It flows sideways along the upper surface toward the center, and supplies sufficient secondary air while suppressing the flame in each sideways flame hole 4 sideways.

This prevents the flames from each sideways flame hole 4 from pointing upwards and coming too close to the food being cooked, and provides cooking conditions suitable for strong, distant flames and roasting while ensuring complete combustion. Furthermore, the air in the space 6 surrounded by the burner head 1 is controlled by a ventilation restriction lid 7.
By blocking the ventilation, hot air tends to get trapped in the space 6, and a uniform hot air layer is formed in the space 6 of the burner head 1, and only the upper part is released, so that roasting can be done more thermally efficiently and successfully without uneven cooking. can be achieved well. Also, for this reason, not much heat reaches around the burner head 1 in the combustion chamber 9b,
Even if the cylinder 8 is loaded near the burner head 1, it is safe and the container body 9 can be made smaller. Furthermore, since the outer periphery of the burner head 1 is cooled by the secondary air flowing into the combustion chamber 9b, the temperature rise of the entire burner head 1 is suppressed, incomplete combustion due to decreased primary air intake does not occur, and combustion efficiency is improved. It will be expensive. The lower the position of the secondary air intake 9e relative to the burner head 1, the more effective it is for cooling the burner head 1.

It is also possible to provide a secondary air replenishment port on the lid 7 or its mounting portion to appropriately replenish the flame 25 with secondary air from below the space 6.

Embodiment 2 (FIG. 4) As shown in the figure, opening/closing is possible depending on the alignment of the notch 31 formed in the flange 1c of the burner head 1 and the notch 32 in the flange 7a of the ventilation restriction lid 7. A secondary air supply port 33 whose temperature is adjusted is formed.

Embodiment 3 (FIG. 5) A burner head 34 is constructed by combining a press-molded lower half 34a and an upper half 34b into one body by seam welding 35, edge wrapping 35, etc. 36 is also integrally formed with each of the upper and lower halves 34a and 34b, but it may be connected to a separate body as in the first embodiment. The ventilation restriction lid 7 is mounted on the inner peripheral flange 34c of the lower half body 34a. The lid 7 has a secondary air supply port 33 in the upper part of its peripheral wall.

Embodiment 4 (FIG. 6) As shown in the figure, a U-shaped or rectangular annular burner head 41 is formed by bending a tube body, and a mixing tube 42 is also formed integrally. Beneath the burner head 41 is a support 43 for receiving the ventilation restriction lid 7.
are fixed by spot welding etc.

(Effects of the invention) According to the invention, the annular burner head is provided on the inner periphery of the burner head, with the ventilation restricting lid moderately preventing air from blowing from the bottom to the top of the space it surrounds. It prevents the horizontal flame from blowing up from the horizontal flame hole, and also traps hot air in the space surrounded by the burner head to form a uniform layer of hot air for cooking. Outside air enters from the intake port provided in the stove body, and the outside air enters the annular secondary air between the top surface of the burner head of the stove body and the opening edge of the cover that covers it, which is above or somewhat close to the inner periphery of the burner head. The air flows sideways from the air supply port along the upper surface of the annular burner head toward its center, suppressing the horizontal flame from the flame hole on the inner circumference of the burner head and supplying sufficient secondary air to the horizontal flame. Since complete combustion is performed while maintaining a state in which the flame is prevented from blowing up, roasting can be successfully achieved without the direct influence of flames and without uneven grilling. In addition, sufficient secondary air is supplied, and the secondary air flows in and cools the burner head, preventing insufficient primary air intake due to temperature rise, ensuring complete combustion and thermal efficiency. will also improve significantly.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the main parts of the first embodiment of the present invention;
Figures 2 and 3 are cross-sectional views of the entire simple stove body;
A plan view, FIG. 4 is a perspective view of a part of the second embodiment, FIG. 5 is a sectional view of a part of the third embodiment, and FIG.
FIG. 3 is a perspective view of a portion of the embodiment. 1, 34, 41...burner head, 4...flame hole, 6...space, 7...ventilation restriction lid, 9...stove body, 9b...combustion chamber, 9e...secondary air intake, 11...Cover, 11a...Opening edge, 2
9...Secondary air supply port.

Claims (1)

[Scope of utility model registration request] The stove body has an annular burner head with horizontal flame holes arranged on the inner periphery, and this burner head is located below the flame hole to restrict ventilation from below in the space surrounded by the burner head. A ventilation restriction lid is installed to prevent the burner head of the stove body,
An annular secondary air supply port is formed between the upper inner periphery of the burner head of the cover that covers this and the opening edge that approaches from above, and an air intake port is provided around the burner head accommodating portion of the stove body. A gas stove featuring