Cooking stove

【0001】

[Technical field to which the invention belongs]

The present invention relates to a flame leakage prevention type stove that prevents a burner flame from leaking from the periphery of a cooking container.

【0002】

[Conventional technology]

[Patent Document 1]

Japanese Unexamined Patent Publication No. 8-303783 [0003]

Conventionally, there has been known a flame leakage prevention type stove that prevents the flame of a burner from leaking from the periphery of a cooking container to prevent ignition of the cuffs of clothes and heating of the handle of the cooking container. As such a flame leakage prevention type stove, for example, as disclosed in Japanese Patent Application Laid-Open No. 8-303783, a donut-shaped trivet capable of contacting the bottom surface of the cooking container over the entire circumference is placed on the top plate. There is one provided in. In this stove, the cooking container is placed on the donut-shaped trivet to cover the combustion chamber in the center of the trivet with the bottom of the cooking container to prevent flames and hot air from leaking to the outside of the trivet.

【0004】

[Problems to be Solved by the Invention]

However, since the bottom surface of the cooking container comes into contact with the entire upper surface of the trivet, there is a problem that the cooking container sticks to the trivet due to simmering juice or the like wrapping around the contact surface, which is not easy to use. In addition, there is also a problem that the thermal efficiency is low because it can be heated only in the central part of the bottom surface of the cooking container surrounded by the trivets. An object of the present invention is to solve the above problems and to provide a stove having a flame leakage prevention function that is easy to use and has high thermal efficiency.

【0005】

[Means for solving problems]

The stove according to claim 1 of the present invention that solves the above problems is provided with a burner that heats the bottom surface of the cooking container and a ring around the side of the cooking container, and a gas flow is provided on a surface facing the side surface of the cooking container. The gist is that an annular gas passage body having an outlet is provided and a fan for discharging gas from the gas outlet is provided, and an air curtain is formed around the cooking container by the gas flowing out from the gas outlet.

【0006】

Further, the stove according to claim 2 of the present invention is provided with a guide means for flowing the gas flowing out from the gas outlet so as to swirl around the cooking container in the stove according to claim 1. It is a summary.

【0007】

Further, the stove according to claim 3 of the present invention is a gas that sucks the combustion exhaust of the burner on the surface of the annular gas passage body facing the side surface of the cooking container in the stove according to claim 1 or 2. An inflow port is formed so that the sucked combustion exhaust gas is discharged from the gas outlet, and the discharged combustion exhaust gas is sucked again from the gas inlet to circulate the combustion exhaust gas through the annular gas passage body. The gist is that.

【0008】

The gist of the stove according to claim 4 of the present invention is that, in the stove according to claim 3, a part of the combustion exhaust gas circulating in the annular gas passage body is discharged from the exhaust passage.

【0009】

Further, in the stove according to claim 5 of the present invention, in the stove according to claim 3 or 4, the gas inlet is in the upper stage of the annular gas passage body, and the gas outlet is in the annular gas passage body. The gist is that they are formed in a ring shape at the bottom.

【0010】

The stove according to claim 6 of the present invention is based on the gist that the gas inflow port is directed diagonally downward and the gas outlet is directed diagonally upward in the stove according to claim 5.

【0011】

Further, the stove according to claim 7 of the present invention is the stove according to any one of claims 1 to 6, wherein the burner has a flame opening row formed on the inner peripheral surface of the central opening of the annular body. The gist is that it is a facing flame mouth burner.

【0012】

Further, the stove according to claim 8 of the present invention is the stove according to claim 7, in which the flame ejection direction of the flame port of the inward flame port burner is set to the rotation direction side of the gas swirling around the cooking container. The gist is that it was tilted.

【0013】

Further, the container according to claim 9 of the present invention adjusts the guide means in the container according to any one of claims 2 to 8 to change the angle at which gas flows out from the gas outlet. It is provided with a means for changing the outflow angle and a means for setting a cooking container for setting the outer diameter of the cooking container to be used. Compared with the case, the gist is to change the gas outflow angle toward the center of the cooking container by the above-mentioned outflow angle changing means.

【0014】

Further, the stove according to claim 10 of the present invention is the stove according to any one of claims 2 to 9, wherein the air volume adjusting means for adjusting the air volume of the fan and the outer diameter of the cooking container used are used. When the cooking container is set to have a small outer diameter, the amount of air blown by the fan is increased as compared with the case where the cooking container is set to have a large outer diameter. The gist is that.

【0015】

In the stove according to claim 1 of the present invention having the above configuration, the flame of the burner leaks upward from the bottom surface of the cooking container by the air curtain formed around the cooking container by the gas flowing out from the gas outlet. To prevent. Moreover, since the air curtain due to the flow of gas suppresses the leakage of the flame without contacting the cooking container, there is also a problem that the cooking container sticks to the member for enclosing the flame due to broth or the like as in the past. Does not occur.

【0016】

Further, the stove according to claim 2 of the present invention can further prevent the leakage of the burner flame by flowing the gas flowing out from the gas outlet by the guide means so as to swirl around the cooking container. it can.

【0017】

Further, the stove according to claim 3 of the present invention circulates the combustion exhaust gas on the side surface of the cooking container via the gas inlet and the gas outlet, so that heat energy can be obtained from the combustion exhaust gas that was conventionally discharged as it is. It can be recovered and the thermal efficiency can be improved.

【0018】

Further, since the stove according to claim 4 of the present invention discharges a part of the circulated combustion exhaust gas from the exhaust passage, the amount of combustion exhaust generated by the combustion of the burner is appropriately discharged from the annular gas passage body. It is possible to maintain good combustion of the burner, and the circulation flow rate is appropriately maintained so that smooth circulation can be continued.

【0019】

Further, in the stove according to claim 5 of the present invention, since the gas inlet is provided above the gas outlet, external air can also be sucked from above the gas inlet. This air suction further reliably prevents the combustion exhaust from flowing upward.

【0020】

Further, in the stove according to claim 6 of the present invention, the gas inlet provided in the upper stage is directed diagonally downward and the gas outlet provided in the lower stage is directed diagonally upward, so that the combustion exhaust gas flowing out from the gas outlet is discharged. Smooth suction can be performed from the gas inlet, the circulation of combustion exhaust is improved, and the stability and thermal efficiency of the air curtain are further improved.

【0021】

Further, since the stove according to claim 7 of the present invention uses an inward flame port burner in which a flame is ejected toward the center of the bottom surface of the cooking container as a burner, the flame leaks from the bottom surface of the cooking container. It can be further prevented.

【0022】

Further, the stove according to claim 8 of the present invention can smoothly flow the combustion gas from the flame port by the flow of the air curtain, so that the combustion performance is improved. As a result, the thermal efficiency can be further improved. Furthermore, the air curtain becomes stable, further preventing the leakage of flames.

【0023】

Further, the stove according to claim 9 of the present invention improves the leakage of flame by changing the gas outflow angle from the gas outlet toward the center of the cooking container when using a small cooking container. To prevent. In other words, if a small cooking container is used, the gap between it and the annular gas passage body becomes large and the flame easily leaks out. However, by setting the gas outflow angle to the center direction side of the cooking container, the gas is cooked. Make sure to flow to the side wall of the container to prevent the leakage of flame.

【0024】

Further, the stove according to claim 10 of the present invention has good flame leakage by speeding up the gas flow from the gas outlet and strengthening the air curtain when using a small cooking container. To prevent.

【0025】

BEST MODE FOR CARRYING OUT THE INVENTION

In order to further clarify the configuration and operation of the present invention described above, a preferred embodiment of the stove of the present invention will be described below.

【0026】

<< First Embodiment >> FIG. 1 is a schematic configuration diagram of a flame leakage prevention type stove as the first embodiment. In this flame leakage prevention type table stove 1 (hereinafter, simply referred to as a stove 1), an opening 2a is provided in the top plate 2, and a ring-shaped inward flame port burner 3 (hereinafter, simply a burner) is provided at the center of the opening 2a. 3) is placed. A trivet 4 on which the cooking pot P is placed is provided around the burner 3, and a soup saucer 5 is provided below the burner 3.

【0027】

A ring-shaped gas passage body 6 is provided so as to surround the cooking pot P placed on the trivet 4. As shown in FIGS. 2 to 5, the gas passage body 6 is divided into two upper and lower chambers, an upper inflow chamber 6a and a lower outflow chamber 6b, and an inflow port 6c is provided on the inner peripheral side of the inflow chamber 6a. Outlet 6d is opened in a ring shape on the inner peripheral side of the outflow chamber 6b. 3 is a cross-sectional view taken along the alternate long and short dash line AA in FIG. 2, FIG. 4 is a schematic explanatory view of the outflow chamber 6b seen from the alternate long and short dash line BB direction in FIG. 3, and FIG. 5 is a schematic explanatory view. , It is a schematic explanatory view of the inflow chamber 6a seen from the one-dot chain line CC direction in FIG. Further, the suction passage 6e communicates with the inflow chamber 6a in the outer peripheral tangential direction of the inflow chamber 6a, and the delivery passage 6f communicates with the outflow chamber 6b in the outer peripheral tangential direction of the outflow chamber 6b. The suction passage 6e is connected to the suction port of the fan 7 provided on the lower surface of the top plate 2, and the delivery passage 6f is connected to the air outlet of the fan 7. Therefore, when the fan 7 is driven, gas is sucked from the inflow port 6c, and after being sucked into the fan 7 through the inflow chamber 6a and the suction passage 6e, this gas flows through the delivery passage 6f and the outflow chamber 6b. It is discharged from exit 6d. Further, the gas flowing out from the outflow port 6d is sucked from the inflow port 6c again to form a gas circulation path for circulating the gas through the gas passage body 6. Further, as shown in FIG. 6, a discharge passage 8 for discharging the circulating gas to the outside communicates with the delivery passage 6f. A distribution plate 18 is provided at the communication portion with the discharge passage 8 in the delivery passage 6f, and the discharged gas is distributed from the circulating gas to the discharge passage 8 side at an appropriate ratio. In FIG. 1, the distribution plate 18 is omitted.

【0028】

As shown in FIG. 3, the upper and lower edges of the outflow port 6d are bent diagonally downward inside the outflow chamber 6b to form an outflow ramp 6h, so that gas flows diagonally upward from the outflow port 6d. leak. On the other hand, since the upper and lower edges of the inflow port 6c are bent diagonally upward on the inflow chamber 6a side to form an inflow ramp 6g, gas is sucked into the inflow port 6c from diagonally downward. Further, as shown in FIG. 4, a plurality of guide plates 9 are erected at equal intervals over the entire circumference of the outflow ramp 6h, and the plate surfaces are directed in a direction deflected by a predetermined angle X from the center of the ring. .. Therefore, the gas flowing out from the outlet 6d flows so as to swirl around the cooking pot P. Further, as shown in FIG. 5, since the guide plate 9 is deflected by a predetermined angle X from the center and arranged in a large number of rows on the inflow ramp 6g, the gas sucked into the inflow port 6c is also the cooking pot P. It flows around and is inhaled.

【0029】

The burner 3 is an inward flame burner in which a large number of flame ports 3a are arranged in a circumferential direction on the inner peripheral surface of the ring-shaped mixing chamber, and as shown in FIG. 7, the flame port 3a is from the center of the ring. The columns are arranged by deflecting them by a predetermined angle X and tilting them upward. Therefore, the flame swirls, the residence time and distance of the flame at the bottom of the pot become long, the bottom of the pot is effectively used for heat transfer, and the thermal efficiency becomes high. Further, the swirling of the flame facilitates the flow of the gas ejected from the flame port 3a, improving the suction of the primary air and improving the stirring contact with the secondary air, so that the combustibility can be improved.

【0030】

The trivet 4 is formed by arranging five claw pieces 4a made of an L-shaped metal plate radially on a ring-shaped trivet base 4b. Therefore, the cooking pot P is held in line contact with the bottom surface thereof. Further, the burner 3, the trivet 4, and the gas passage body 6 are fixedly installed on the ring-shaped fixing base 10 provided in the opening 2a of the top plate 2.

【0031】

In the stove 1 having the above-described configuration, the cooking pot P is placed on the trivet 4, and the burner 3 is ignited by pressing an ignition button (not shown) to perform cooking. At this time, the fan 7 is also driven at the same time. After reaching the bottom of the pot, the combustion flame of the burner 3 first hits the vicinity of the center and spreads to the vicinity of the outer circumference while swirling to heat the cooking pot P satisfactorily. After heating the bottom of the pot, the combustion exhaust gas rises in the gap between the cooking pot P and the gas passage body 6 due to the draft force.

【0032】

The combustion exhaust gas is sucked from the inflow port 6c of the gas passage body 6 and flows out from the outflow port 6d through the suction passage 6e and the delivery passage 6f so as to swirl around the cooking pot P. At this time, since the delivery passage 6f is provided in the direction of the outer peripheral tangential line of the gas passage body 6, the combustion exhaust flows along the outer peripheral wall of the outflow chamber 6b and evenly flows out from the outflow port 6d opened in a ring shape. It turns smoothly and flows. The spilled combustion exhaust gas swirls around the cooking pot P, is sucked in again from the inflow port 6c, and is circulated through the gas passage body 6. Since the suction passage 6e is also provided in the tangential direction of the outer periphery of the gas passage body 6, the combustion exhaust gas is evenly sucked from the inflow port 6c opened in a ring shape. In this way, an air curtain can be formed in the gap between the cooking pot P and the gas passage body 6, and the flame or hot air of the burner 3 can be prevented from leaking from the bottom of the pot. As a result, it is possible to prevent the sleeves from burning due to the ignition of the cuffs of clothes and the handle of the cooking pot P from being heated, and to use it safely.

【0033】

Moreover, since the air curtain by the flow of gas suppresses the leakage of flames and hot air without contacting the cooking pot P, the cooking pot P uses broth or the like as a member for enclosing the flames and hot air as in the past. There is no problem of sticking. For this reason, cleaning is easy and it is easy to use. Further, since the combustion exhaust can be flowed smoothly around the cooking pot P, the air curtain can be stabilized and the leakage of flames and hot air can be prevented more effectively.

【0034】

In addition, since the combustion exhaust is circulated on the side surface of the cooking pot P, heat energy can be recovered from the combustion exhaust that was conventionally discharged as it is, and the thermal efficiency is improved. Further, since the external air is also sucked from the inflow port 6c from above, the downward flow of the intake air can surely prevent the combustion exhaust from flowing out upward, and the function of the air curtain can be improved. .. Moreover, the gas passage body 6, the suction passage 6e, the fan 7, and the delivery passage 6f can be cooled by the intake air and used safely.

【0035】

A part of the circulating gas in which the combustion exhaust gas circulating through the gas passage body 6 and the external air are mixed is discharged from the discharge passage 8. At this time, the discharge amount is adjusted by the distribution plate 18 to the total amount of the generated combustion exhaust amount and the sucked external air amount so that the circulating gas flowing through the delivery passage 6f has a constant flow rate. Can be prevented from overflowing from the gas passage body 6, and can be circulated smoothly. That is, the generated combustion exhaust can be reliably sucked in and circulated without leaking, and then discharged, which is economical without wasting the energy of the combustion exhaust.

【0036】

Further, since the inflow port 6c is directed diagonally downward and the inflow port 6d is directed diagonally upward, the circulating gas flowing out from the inflow port 6d can be smoothly sucked from the inflow port 6c. As a result, the resistance for circulating the circulating gas is reduced, and the capacity of the fan 7 can be reduced. Therefore, the fan 7 can be compactly stored in the lower part of the top plate 2.

【0037】

Further, since the inward flame burner in which the flame is ejected toward the center of the bottom surface of the cooking pot P is used as the burner 3, it is possible to further prevent the flame from leaking from the bottom surface of the cooking pot P. Further, in this burner 3, since the flow of the combustion gas is swirled in the same direction as the air curtain, the combustion gas can flow smoothly by the flow of the air curtain, and the combustion performance is improved. As a result, the thermal efficiency can be further improved. Furthermore, the air curtain becomes stable, further preventing the leakage of flames.

【0038】

<< Second Embodiment >> Next, the stove of the second embodiment will be described with reference to FIGS. 8 and 9. The parts different from those of the first embodiment will be described, and the same reference numerals will be given to the overlapping parts, and the description thereof will be omitted. In the stove of the second embodiment, the gas outflow angle from the outlet 6d can be changed. That is, when a small cooking pot P is used, the gap between the gas passage body 26 and the gas passage body 26 becomes large and the flame easily leaks out, but the gas outflow angle from the outlet 6d is the center of the cooking pot P. By changing to the directional side, leakage of flames and hot air is satisfactorily prevented. The configuration will be described below.

【0039】

In the second embodiment, the guide plate 29 is not fixed to the outflow ramp 6h and is rotatably provided by the rotation shaft 11. Further, the ends of the adjacent guide plates 29 are connected by the connecting wire 12. An elongated hole 29a is opened at the end of the guide plate 29, through which the connecting wire 12 is inserted, and the stop ring 13 is connected to the connecting wire 12 so as to sandwich the guide plate 29 from both sides. The stop ring 13 is larger than the size that cannot pass through the elongated hole 29a. Therefore, the connecting wire 12 can move in the elongated hole 29a in the longitudinal direction, but when the connecting wire 12 is pulled in the direction perpendicular to the elongated hole 29a, the stop ring 13 is caught in the elongated hole 29a, so that the guide plate 29 also moves in conjunction with the elongated hole 29a. .. Further, the rotating gear 15 is connected to the rotating shaft 11 of one of the many guide plates 29 via the connecting tube 14. The rotating gear 15 meshes with a connecting gear 17 connected to a pan diameter setting knob 16 (provided on an operation panel surface (not shown)) for setting the outer diameter of the cooking pan P to be used, and the pan diameter setting knob 16 The rotation shaft 11 is rotated in conjunction with the turning operation.

【0040】

Next, the movement of the guide plate 29 when the pot diameter setting knob 16 is turned and operated will be described. When the pot diameter is turned to the smaller side (for example, counterclockwise), the guide plate 29 provided with the rotating gear 15 that meshes with the connecting gear 17 rotates in a direction in which a predetermined angle from the center becomes smaller. Since the adjacent guide plates 29 are connected to each other by the connecting wire 12, when one guide plate 29 rotates, all the guide plates 29 rotate in the same manner (guide plates 29 represented by solid lines in the figure). From to the guide plate 29 represented by the dotted line). Therefore, when using a small cooking pot P, the gas outflow angle from the outlet 6d is changed to the center direction side of the cooking pot P, and the circulating gas flows out toward the center direction. Even if the gap between the gas passage body 26 and the gas passage body 26 becomes large, the circulating gas can be surely flowed to the side wall of the cooking pan P to satisfactorily prevent the leakage of flames and hot air.

【0041】

Further, the outflow rate of the circulating gas may be changed according to the pot diameter. That is, when a small cooking pot P is used, even if the gap between the cooking pot P and the gas passage body 26 is increased by increasing the rotation speed of the fan 7 to increase the outflow rate of the circulating gas, Good prevention of leakage of flames and hot air. In this case, a variable resistor (not shown) whose resistance value changes according to the rotation angle of the pot diameter setting knob 16 may be provided, and the amount of electricity supplied to the fan 7 may be changed by the change in the resistance value. .. Further, both the gas outflow angle and the outflow rate may be changed according to the pot diameter.

【0042】

Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and it goes without saying that the present invention can be implemented in various embodiments without departing from the gist of the present invention. For example, the outer diameter of the cooking pot P is not limited to the one that is manually set, but the pot diameter may be automatically detected and set, and the gas outflow angle and the outflow speed may be adjusted according to the pot diameter. .. Further, in the present embodiment, the inward flame burner is used as the burner 3, but a normal burner in which the flame ports are arranged on the outer circumference may be used.

【0043】

[Effect of the invention]

As described in detail above, according to the stove according to claim 1 of the present invention, the air curtain prevents the flame of the burner from leaking from the bottom surface of the cooking container and can be used safely. Moreover, since the leakage of the flame is suppressed in a non-contact manner with the cooking container, there is no problem that the cooking container sticks to the member for enclosing the flame due to broth or the like as in the conventional case, and the usability is good.

【0044】

Further, according to the stove according to claim 2 of the present invention, since the gas can flow smoothly, the air curtain can be stabilized and the leakage of flame can be prevented more satisfactorily.

【0045】

Further, according to the stove according to claim 3 of the present invention, since the combustion exhaust is circulated on the side surface of the cooking container, heat energy can be recovered from the combustion exhaust that was conventionally discharged as it is, which saves energy.

【0046】

Further, according to the stove according to claim 4 of the present invention, since the combustion exhaust is smoothly circulated, the air curtain can be stabilized and energy is saved without wastefully leaking the combustion exhaust.

【0047】

Further, according to the stove according to claim 5 of the present invention, since the external air is also sucked from the gas inlet from above, the downward flow of the sucked air ensures that the combustion exhaust is prevented from flowing upward. However, the function of the air curtain can be improved.

【0048】

Further, according to the stove according to claim 6 of the present invention, the resistance for circulating the combustion exhaust can be reduced and the capacity of the fan can be reduced, so that the fan can be easily stored in the vessel.

【0049】

Further, according to the stove according to claim 7 of the present invention, since the inward flame port burner is used, the leakage of the flame from the bottom surface of the cooking container can be prevented more satisfactorily.

【0050】

Further, according to the stove according to claim 8 of the present invention, the combustion gas of the burner can be smoothly flowed by the flow of the air curtain, and the combustion performance is improved. As a result, the thermal efficiency can be further improved. Further, the air curtain becomes stable and the leakage of flame can be prevented more satisfactorily.

【0051】

Furthermore, according to the stoves according to claims 9 and 10 of the present invention, leakage of flame can be satisfactorily prevented even when a small cooking container having a large gap with the annular gas passage body is used.

[Simple explanation of drawings]

FIG. 1 is a schematic configuration diagram of a stove as a first embodiment.

FIG. 2 is an external view of a gas passage body as the first embodiment.

FIG. 3 is a cross-sectional view of a gas passage body as the first embodiment.

FIG. 4 is a schematic explanatory view of an outflow chamber as the first embodiment.

FIG. 5 is a schematic configuration diagram of an inflow chamber as the first embodiment.

FIG. 6 is a cross-sectional explanatory view of a communication portion between a delivery passage and a discharge passage as the first embodiment.

FIG. 7 is an explanatory diagram showing an arrangement of flame openings of a burner as a first embodiment.

FIG. 8 is a schematic explanatory view of an outflow chamber as a second embodiment.

FIG. 9 is an enlarged explanatory view of a guide plate portion as a second embodiment.

[Explanation of symbols]

1 ... stove, 3 ... burner, 3a ... flame port, 6,26 ... gas passage, 6c ... inlet, 6d ... outlet, 6g ... inflow ramp , 6h ... Outflow ramp, 7 ... Fan, 8 ... Discharge passage, 9,29 ... Guide plate, 11 ... Rotating shaft, 12 ... Connecting wire, 15 ... Rotating gear, 16 ... pot diameter setting knob, 17 ... connecting gear, P ... cooking pot.