JP3670117B2 - Range using internal flame hole type gas burner - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a range using a gas burner, and more particularly to a range suitable for a commercial range used in a kitchen such as a restaurant.
[0002]
[Prior art]
Many commercial ranges used in Japanese restaurants and Chinese restaurants use so-called Bunsen burners. The Bunsen burner used in this type of conventional range includes an annular part having a flame hole and a gas introducing part for introducing gas together with primary air into the annular part. A gas nozzle connected to a gas source is connected to one end of the gas introduction part, and a primary air suction hole is provided so as to surround the gas nozzle. On the other hand, the other end of the gas introduction part communicates with the inside of the annular part. Many flame holes are formed in the connection part of the top wall of an annular part, an outer peripheral wall, and an inner peripheral wall.
[0003]
In the conventional Bunsen burner having such a structure, when gas is supplied from a gas nozzle outlet connected to an appropriate gas source such as city gas or natural gas into the gas introduction portion, Therefore, the primary air is naturally sucked into the gas introduction part through the primary air suction hole. The gas thus introduced into the gas introduction part and the primary air are mixed, flow into the annular part, and are ejected from the respective flame holes arranged along the outer periphery and inner periphery of the top part of the annular part. In this way, a flame is formed by igniting the mixed gas ejected from the flame hole by an appropriate ignition method, for example, a piezoelectric ignition method or a continuous spark method.
[0004]
[Problems to be solved by the invention]
In the conventional range using such a conventional Bunsen burner, the amount of primary air naturally sucked from the primary air suction hole is only 40 to 70% of the air used for combustion, and the remaining 60 to 30%. The secondary air must be replenished from around the flame. For this reason, the flame has a strong tendency to spread to the outside of the outer periphery of the annular portion, and it is difficult to concentrate the fire power. In addition, the combustion efficiency is low and the amount of nitrogen oxides generated is large.
[0005]
Since the flame tends to spread to the outside of the outer periphery of the annular portion, in the commercial range or the like, the virtues and the top plate of the range are heated, and the heat is easily transmitted to the cook, and the heat efficiency is also deteriorated.
[0006]
Furthermore, since the flame extends from the top surface of the annular portion, it is easily affected by the surrounding wind, and is particularly unstable with respect to the cross wind.
[0007]
In order to solve the problems of the conventional range, instead of the conventional Bunsen burner, the gas can be burned with high efficiency and the generation of nitrogen oxides can be kept low. It is conceivable to use an internal-flame type burner that can increase the thermal efficiency because a high-heat-powered flame can be heated close to the object to be heated. However, as with the conventional range, if the internal flame burner is simply arranged on the front side of the range, the following problems occur due to the characteristics of the internal flame burner used. End up.
[0008]
That is, in the internal flame hole type burner, since a high primary air rate is required, a long mixing tube is necessary, and when the burner is arranged on the front side of the range, not only the total length of the range is increased, Most of it becomes a useless space, and installation property deteriorates. In addition, in the internal flame type burner, the secondary flame tends to extend long, and if the burner is arranged on the front side of the range, there is a possibility that the cook may be burned. .
[0009]
The object of the present invention is to provide a gas range that uses an internal flame-hole burner to solve the problems of the prior art as described above, and also eliminates the problems associated with the use of an internal flame-hole burner. It is to be.
[0010]
[Means for Solving the Problems]
According to the present invention, in the range including a range table having a mounting unit for mounting an object to be heated and a gas burner disposed in the range table, the mounting unit described above includes the range table. It is arranged on the upper surface portion close to the back side, the upper surface portion on the front side of the range stand is a work surface on which food containers and the like can be placed, and the gas burner is a position corresponding to the placement portion described above An annular portion having a flame hole disposed in the gas passage, and a gas introduction portion for introducing gas together with primary air into the annular portion, wherein the flame hole of the annular portion of the gas burner It is constituted by a plurality of through openings formed along the peripheral surface of the inner peripheral wall, and the fuel gas is ejected from the annular portion through the through openings into the inner peripheral wall and ignited. From the inner peripheral wall of the annular portion, the placement portion described above Characterized in that it is burned as a small flame rises and.
[0011]
According to a preferred embodiment of the present invention, the mounting portion of the range table is provided with a sign holder, and secondary air is provided between a lower periphery of the sign holder and an upper part of the annular portion. A passage is formed, a secondary air port leading to the secondary air passage is formed in the lower part on the back side of the range table, and a primary air port is formed in the lower part on the front side of the range table. ing.
[0012]
According to another embodiment of the present invention, the gas introduction part of the gas burner is configured to extend obliquely from the annular part toward the front side of the range table.
[0013]
According to still another embodiment of the present invention, the through opening has an elongated rectangular shape.
[0014]
According to still another embodiment of the present invention, the through opening has a small circular shape.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Next, based on an accompanying drawing, the present invention is explained in detail about the example of the present invention.
[0016]
FIG. 1 is a schematic perspective view showing the overall configuration of a range using an internal flame type gas burner as one embodiment of the present invention, FIG. 2 is a schematic side view thereof, and FIG. 3 is a schematic illustration thereof. It is a top view. As shown in these drawings, the range 100 of this embodiment includes a range table 10 formed of a stainless steel plate and the like, and three internal flame holes arranged in the range table 10, similar to a normal gas range. The gas burner 20 is mainly provided. As shown well in FIG. 2, a normal leg 70 is provided on the bottom surface of the range table 10. The detailed structure and operation of the internal flame hole type gas burner 20 will be described later.
[0017]
In this embodiment, the upper surface portion on the back side of the range table 10 is a placing portion 11 for placing a cooking device such as a pan, a pot, a frying pan, etc. The upper surface portion on the front side is a bowl, a dish, The work surface 12 can be used for placing food containers such as baskets. A recess 13 is formed in the lower part on the back side of the range table 10 for reasons described later, and louvers 14 are formed on both side surfaces of the range table 10.
[0018]
The mounting portion 11 of the range table 10 is provided with three openings, and the five virtues 40 and the sign holders 50 can be detachably disposed in the openings. As shown well in FIGS. 2 and 3, a gas connection port 60 for connecting to a fuel gas source is attached to the back side of the range table 10 so as to be accommodated in the recess 13. A gas ignition plug 30 corresponding to each of the three internal flame type gas burners 20 is provided on the front surface of the table 10. These gas ignition plugs 30 may be ordinary ones used in a normal gas range, but due to the nature of the internal flame hole type gas burner, a small fire needle is attached so that it is difficult to backfire when the heating power is adjusted. It is good to do. The ignition method may be a piezoelectric ignition using a pilot burner or a continuous-spare method using an igniter. As usual, each gas spark plug 30 is connected to a pipe (see FIG. 5) between a gas introduction portion and a gas connection port 60 of each corresponding internal flame-hole type gas burner 20 disposed in the range table 10 as described later. (Not shown) and can be rotated to control the introduction of gas from the gas connection port 60 to the gas introduction part of each gas burner 20 in synchronization with the ignition operation.
[0019]
As shown by a dotted line in FIG. 3, in this embodiment, each internal flame type gas burner 20 is configured such that the gas introduction portion extends obliquely from the annular portion toward the front side of the range table 10. It is disposed in the range table 10. With such an oblique arrangement, a long mixing distance necessary to achieve a high primary air rate can be ensured, and the depth of the range 100 can be reduced, and the placing portion 11 of the object to be heated is placed in the range. Even if they are gathered to the back side of the table 10, it is possible to prevent inconvenience for the operator to access the table 10, and it becomes possible to use the front side of the range table as a work surface as will be described later. be able to.
[0020]
Next, the structure and operation of each internal flame hole type gas burner 20 arranged in the range table 10 will be described with reference to FIGS. 4 to 12 in particular. FIG. 4 is a schematic perspective view showing one overall structure of the internal flame-hole type gas burner 20, and FIG. 5 is a mutual positional relationship between the range table 10 and the gas burner 20 disposed therein. FIG. 6 is a partial cross-sectional front view showing only the annular portion of the gas burner 20 shown in the perspective view of FIG. 4, and FIG. FIG. 8 is a partially sectional front view showing only the inner cylindrical portion constituting the inner peripheral wall of the annular portion, FIG. 9 is a plan view of the inner cylindrical portion, and FIG. FIG. 11 is a partially sectional front view of an inner cylindrical portion as another embodiment, FIG. 11 is a partially sectional plan view of the inner cylindrical portion of FIG. 10, and FIG. 4 is a schematic diagram for explaining the overall operation of the burner 20. FIG.
[0021]
As shown generally in FIG. 4, the internal flame-hole type gas burner 20 is connected to the outer cylindrical portion 21, the bottom wall portion 22, the annular top portion 23, and the inner cylindrical portion 24 constituting the annular portion. The gas introduction part 25 is made up of. As well shown in FIGS. 6 and 7, the outer cylindrical portion 21 includes a cylindrical portion 21A serving as an outer peripheral wall of the annular portion, and extends so as to protrude from the outer peripheral surface of the cylindrical portion 21A. And a connecting pipe portion 21B suitable for screw connection of the portion 25. As shown well in FIG. 6, the bottom wall portion 22 has a disk shape, and an outer peripheral groove 22A is formed on the outer periphery of the upper surface, and an inner peripheral groove 22B is formed on the inner periphery of the upper surface. The lower end of the cylindrical portion 21 </ b> A of the outer cylindrical portion 21 can be detachably fitted into the outer peripheral groove 22 </ b> A of the bottom wall portion 22.
[0022]
As shown well in FIGS. 6 and 7, the annular top 23 is generally shaped like a truncated conical cylinder, and is detachably attached to the upper end of the cylindrical portion 21 </ b> A of the outer cylindrical portion 21 at the lower end. An outer peripheral groove 23A that fits in is formed. The upper end portion of the annular top portion 23 has a circular shape 23 </ b> B that is dimensioned to be placed in close contact with the upper end portion of the inner cylindrical portion 24 and is aligned with the inner periphery of the inner cylindrical portion 24. .
[0023]
As shown well in FIGS. 8 and 9, the inner cylindrical portion 24 has a large number of elongated rectangular through openings 24 </ b> A penetrating the wall portion along the inner periphery of the upper portion. In this embodiment, the inner cylindrical portion 24 has an outer diameter of 60 mm, an inner diameter of 50 mm, and a height of 71 mm, and the through-opening 24A has a width of 1.4 mm and a height of 22 mm, and is equally spaced along the periphery at intervals of 10 degrees. Is formed. As shown well in FIG. 6, the inner cylindrical portion 24 can be detachably mounted on the bottom wall portion 22 such that its lower end portion is fitted into the inner circumferential groove 22 </ b> B of the bottom wall portion 22. It has become. When the outer cylindrical portion 21 and the inner cylindrical portion 24 are attached on the bottom wall portion 22 and the annular top portion 23 is attached to the upper ends of the outer cylindrical portion 21 and the inner cylindrical portion 24, each through opening of the inner cylindrical portion 24 is provided. The upper end of 24A is closed by the upper end of the annular top 23, so that each through opening 24A can act as a number of internal flame holes. Since the annular portion of the gas burner 20 of this embodiment is easily assembled and disassembled from the outer cylindrical portion 21, the bottom wall portion 22, the annular top portion 23 and the inner cylindrical portion 24, maintenance such as cleaning is easy. Can be.
[0024]
FIGS. 10 and 11 show an alternative inner cylindrical portion that can be used in place of the inner cylindrical portion 24 as described with respect to FIGS. 8 and 9, with the inner cylindrical portion 84 of this embodiment being A plurality of small circular through openings 84A are provided in place of the elongated rectangular through openings. 10 and 11, each through-opening 84A is a circular opening having a diameter of 2 mm, and is formed along the circumference at different height positions at intervals of 3 mm in the height direction. The arrangement pitch along the periphery is 6 degrees, and the through-openings 84A at different height positions are shifted from each other by a half pitch.
[0025]
Next, the operation of the internal flame hole type gas burner 20 having such a structure will be described with reference to FIG. As shown in the schematic partially broken sectional view of FIG. 12, as described above, the annular portion formed by combining the outer cylindrical portion 21, the bottom wall portion 22, the annular top portion 23, and the inner cylindrical portion 24. Thus, the gas burner 20 is assembled by screw-connecting the gas introduction part 25 to the connecting pipe part 21B of the outer cylindrical part 21. A gas nozzle 26 connected to a gas connection port 60 connected to a gas source is connected to an end of the gas introduction part 25 opposite to the screw connection side, as in the conventional Bunsen burner structure. A primary air suction hole 25 </ b> A is provided so as to surround the gas nozzle 26. By doing so, it can be directly connected immediately after the cock, and a high primary air rate can be secured without reducing the gas pressure.
[0026]
In the internal flame hole type gas burner 20 of such an embodiment, by rotating the corresponding gas spark plug 30, the outlet of the gas nozzle 26A connected to an appropriate gas source such as city gas or natural gas. When gas is supplied from 26 </ b> A into the gas introduction part 25, the primary air is naturally sucked into the gas introduction part 25 through the primary air suction holes 25 </ b> A due to the jet flow of this gas. Thus, the gas introduced into the gas introduction part 25 and the primary air are mixed and flow into the annular space formed between the outer cylindrical part 21 and the inner cylindrical part 24, which are annular parts, From the through opening 24 </ b> A formed in the upper part of the inner cylindrical part 24, it is ejected into the internal space surrounded by the inner cylindrical part 24. In this way, a number of flame holes, that is, a mixed gas ejected from the through-opening 24A, is controlled by a rotation operation of the gas spark plug 30. For example, a piezoelectric ignition type or a continuous spark type is used. By performing ignition, a flame 1 is formed as schematically shown.
[0027]
In such an internal flame hole type gas burner, since many small flame holes 24A are provided in the inner cylindrical portion 24 constituting the annular portion, air is easily sucked naturally through the primary air suction holes 25A. Accordingly, since most of the air used for combustion (70 to 100%) can be naturally sucked, the gas ejected into the inner cylindrical portion 24 of the annular portion is substantially naturally sucked through the primary air suction hole 25A. The primary flame alone can be burned as a small flame 1 rising from the inside of the inner cylindrical portion of the annular portion.
[0028]
The mixed gas ejected from the many flame holes 24A or 84A arranged along the inner peripheral surface of the inner cylindrical portion 24 of the annular portion is collected in an internal space surrounded by the inner peripheral surface. Then, it is burned as one small flame 1 rising from the inner space. Therefore, it is possible to concentrate the fire power, and it is difficult to be influenced by the surrounding wind, and in particular, a stable flame strong against cross wind can be obtained.
[0029]
The operation of the internal flame hole type gas burner 20 alone is as described above, but in relation to the range table 10, the following operation is performed. FIG. 5 is a schematic cross-sectional view for easy understanding of the mutual positional relationship between the range table 10 and the gas burner 20 disposed therein, as described above. As shown in the figure, the lower part on the front side of the range table 10 is provided with a primary air port 15 in relation to the gas introduction part 25 of the gas burner 20 disposed inside, and the lower part on the back side of the range table 10, that is, The secondary air port 16 may be provided at the recess 13. Each gas burner 20 is formed such that a secondary air passage 17 is formed between the annular top 23 of the annular part and the lower periphery of each corresponding mark receiver 50 of the mounting part 11 of the range table 10. It is good to arrange in the range stand 10. The secondary air passage 17 is in a position communicating with the secondary air port 16.
[0030]
Since the secondary air port 16 is provided in the recess 13 provided in the lower part on the back side of the range table 10, even if the range table 10 is installed in contact with the wall, it is blocked by it. There is no such thing. In addition, such a recess 13 is effective in that a piping space can be secured.
[0031]
As described above, the flame generated by the internal flame hole type gas burner becomes a small flame concentrated so as not to protrude from the inner circumference of the inner cylindrical portion of the annular portion of the gas burner. It can work efficiently only on cooking utensils such as pots, kettles and frying pans. In other words, since the heat dissipated to the outer peripheral portion of the mounting portion is minimized, heat transfer to the work surface 12 provided on the front side of the range table 10 is also minimized. . Therefore, the worker places a food container such as a bowl on the work surface 12 and immediately prepares the food cooked with the cooking utensil on the virtues 40 of the placing unit 11 as it is. It is possible to easily perform the work of serving.
[0032]
【The invention's effect】
A work surface where the placement unit for placing the objects to be heated is placed on the far side of the range stand, and the front side of the range stand is placed with a food container or the like to serve cooked food. Therefore, if it is used in a kitchen such as a restaurant, it can be conveniently cooked and served according to customer orders.
[0033]
Safety is also secured by putting the placing part which places Gotoku etc. which places a thing to be heated in the back of the range stand, and keeping a long flame away from the cook.
[Brief description of the drawings]
FIG. 1 is a schematic perspective view showing the entire configuration of a range using an internal flame type gas burner as an embodiment of the present invention.
FIG. 2 is a schematic side view of the range of FIG.
FIG. 3 is a schematic plan view of the range of FIG.
4 is a schematic perspective view showing an overall structure of one of the internal flame type gas burners arranged in the range of FIG. 1. FIG.
FIG. 5 is a schematic cross-sectional view for easy understanding of the mutual positional relationship between a range table in the range of FIG. 1 and a gas burner disposed therein.
6 is a partial cross-sectional front view showing only an annular portion of the gas burner shown in a perspective view in FIG. 4. FIG.
7 is a plan view of an annular portion of the gas burner of FIG. 6. FIG.
8 is a partial cross-sectional front view showing only an inner cylindrical portion constituting an inner peripheral wall of the annular portion of FIG. 6;
9 is a plan view of the inner cylindrical portion of FIG. 8. FIG.
FIG. 10 is a partial cross-sectional front view of an inner cylindrical portion as another embodiment.
11 is a partial cross-sectional plan view of the inner cylindrical portion of FIG.
12 is a schematic partially sectional view for explaining the overall operation of the internal flame type gas burner of the embodiment of FIG. 4; FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Flame 10 Range stand 11 Working part 12 Work surface 13 Recess 15 Primary air port 16 Secondary air port 17 Secondary air passage 20 Internal flame hole type gas burner 21 Outer cylindrical part 22 Bottom wall part 23 Annular top part 24 Inner cylinder Portion 24A Through-opening 25 Gas inlet 25A Primary air suction hole 26 Gas nozzle 26A Spout 30 Gas ignition plug 40 Gotoku 50 Shile receptacle 60 Gas connection port 70 Leg 84 Inner cylindrical portion 84A Through-opening

Claims (5)

In a range provided with a range table having a placement unit for placing an object to be heated and a gas burner arranged in the range table, the placement unit described above is an upper surface portion close to the back side of the range table The upper surface portion on the front side of the range table is a work surface on which a food container or the like can be placed, and the gas burner is a flame hole arranged at a position corresponding to the placement portion. An annular portion having a gas introduction portion for introducing gas together with primary air into the annular portion, and the flame hole of the annular portion of the gas burner is formed on a peripheral surface of an inner peripheral wall of the annular portion. The fuel gas is formed by a plurality of through openings formed therethrough, and when the fuel gas is ejected from the annular portion to the inside of the inner peripheral wall through the through opening and ignited, the inner peripheral wall of the annular portion From the front Range, characterized by being burned as. The mounting portion described above of the range table is provided with a sign holder, and a secondary air passage is formed between the lower periphery of the sign holder and the upper part of the annular portion, and the range table The range according to claim 1, wherein a secondary air port communicating with the secondary air passage is formed in a lower portion on the back side of the range, and a primary air port is formed in a lower portion on the front side of the range table. The range according to claim 1 or 2, wherein the gas introduction part of the gas burner extends obliquely from the annular part toward the front side of the range table. The range according to claim 1, 2, or 3, wherein the through opening has an elongated rectangular shape. The range according to claim 1, 2, or 3, wherein the through opening has a small circular shape.

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