JP3535373B2 - Gas stove - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas stove, and more particularly to a structure of a support portion of a burner ring externally fitted and mounted on a burner head.

[0002]

2. Description of the Related Art There is a gas stove in which a burner ring is fitted on a burner head in order to prevent spillage from a pan from entering the stove body. As an example of a gas stove, the drop-in stove shown in FIGS. 11 and 12 can be attached to the countertop (11) of the system kitchen.

A gas burner (31) is arranged in the stove case (20), and a hanging flange engaged with the countertop (11) of the system kitchen is provided on the outer periphery of the upper end of the stove case (20). Around (23). Further, the upper end opening of the stove case (20) is covered with the top plate (41), and the spillage storage recess (40) formed in the top plate (41).
The bottom plate (44) is provided with a burner insertion hole (45) which is fitted into the burner head (30) of the gas burner (31) at a predetermined interval.

A plurality of protrusions (47) (47) for supporting the burner ring (33) fitted on the burner head (30) from below are drawn on the outer peripheral area of the burner insertion hole (45). The burner ring (33) is supported by the protrusions (47) and (47) in a state of being slightly floated from the top plate (41). In this case, when the operation knob (51) provided on the front surface of the appliance is operated, the valve device (39) is opened to supply gas to the gas burner (31) and an ignition device (not shown) is activated. The gas burner (31) burns. Then, at the time of this combustion, the air flowing from the outer periphery of the pot bottom to the gas burner (31) side therebelow → the upper and lower gap between the outer peripheral edge of the burner ring (33) and the top plate (41) → the burner insertion hole (45) → In the stove case (20) → The gas flows through the gas inlet (35) of the gas burner (31) and is supplied to the gas burner (31) as primary air for combustion.

[0005]

However, it is difficult to sufficiently increase the vertical distance between the top plate (41) and the burner ring (33), which are the passages of the primary air for combustion, in the above-mentioned conventional device. However, when a large pot is hung, there is a problem that the primary air for combustion tends to fall into a shortage state.

The above problems will be described in more detail. Protruding
Since (47) and (47) are provided in a narrow space hidden below the burner ring (33), the diameter of the base end cannot be increased. Therefore, the protrusion depending on the diameter of the base end
(47) It is not possible to increase the diaphragm height of (47), and it is not possible to secure a sufficient vertical distance between the burner ring (33) and the top plate (41) placed on this. From this, the gas burner (31) is inserted through the vertical interval between the burner ring (33) and the top plate (41).
If a sufficient amount of primary air for combustion is not supplied, and a large pot is hung on it, the air shortage easily occurs.

The present invention has been made in view of the above points,
It is an object of the present invention to provide a gas stove having a structure capable of ensuring a large vertical gap between the burner ring (33) and the top plate (41) and supplying a sufficient amount of combustion air to the gas burner (31). And

[0008]

[Means for Solving the Problems] The technical means of the present invention for solving the above-mentioned problems is to provide a "stove case (20) for accommodating a gas burner (31) and an upper opening of the stove case (20). A top plate that covers the burner head (30) of the gas burner (31) and has a burner insertion hole (45) that is fitted on the burner head (30) at a distance.
(41) and the burner head (30) and the top plate (4)
(1) A gas stove including a burner ring (33) arranged so that a vertical gap is formed between the burner stove and the burner insertion hole (45). The pieces (48) (48) support the burner ring (33) from below. "

According to the above technical means, the burner ring (3
Since the extension pieces (48) (48) that support (3) protrude from the peripheral edge of the burner insertion hole (45) formed in the top plate (41), there is a limit to the height of the diaphragm as described above. As described above, the protrusion height of the extension pieces (48) (48) can be made higher than that of the conventional protrusions (47) (47). Therefore, the vertical distance between the top plate (41) and the burner ring (33) can be increased as compared with the conventional one.

[0010]

The above invention has the following unique effects. Since the vertical distance between the top plate (41) serving as a flow path for combustion air and the burner ring (33) can be made larger than that of the above-described conventional one, a larger amount of combustion air is used in the gas burner. A gas stove having a structure that can be supplied to (31) is obtained.

[Others] * a In the above invention, "the inner side of the upper edge of the downwardly expanding tapered cylindrical ridge (42) formed by squeezing a part of the top plate (41) is the burner insertion hole. (45), and the extension piece (4) at the same inclination angle as the generatrix of the tapered tubular raised portion (42).
8) has been extended ”.

* B In the above invention, "a corner portion between the peripheral edge of the burner insertion hole (45) and the base end portion (481) of the extension piece (48) and the extension piece (4)
In the outer peripheral edge of 8), edge curving portions (43) formed by hemming these peripheral edges are formed '', in the case of the extension pieces (48) (48) by the curving edge portion (43). Strength is improved. Therefore, the sliding tool used when cleaning the top plate (41) should be
Even if the extension pieces (48) and (48) are hit, the extension pieces (48) and (48) are less likely to be deformed, and the burner ring (33) can be supported in an appropriate state for a long period of time.

Item c: In the above invention, "the tip end (480) of the extension piece (48) is located closer to the burner head than the base end (481) of the extension piece (48) and the outer periphery of the burner head (30). The burner ring (33) extends to the vicinity thereof, and the burner ring (33) has a tapered ring portion that rises toward the center, a little overhangs horizontally from the inner periphery thereof, and is supported from below by the tip portions (480) (480). It consists of a flat ring part '' that is made up of the flat ring part of the inner circumference of the burner ring (33) to facilitate the downward flow of spills from the pan. Even if the width of the flat ring is slightly narrowed), the flat ring is extended by the tips (480) (480) of the extension pieces (48) (48) that extend to the vicinity of the outer periphery of the burner head (30). Supported by the burner ring
(33) can be supported horizontally. That is, in the same manner as above, burner ring (33) for facilitating the downward spillage
Unlike the case where the whole is formed in a tapered ring shape, even if there is some variation in the concentricity of the burner ring (33) and the gas burner (31), it can be supported horizontally.

The extension pieces (48) (48) located near the outer periphery of the burner head (30) have a base end portion (48) (48) immediately below the tip portions (480) (480) of the extension pieces (48) (48). 481) When the (peripheral portion of the burner insertion hole (45)) is located, the distance between the peripheral edge of the burner insertion hole (45) and the burner head (30) becomes narrow, and the flow rate of combustion air decreases. By contrast, according to the above technical means, the base end portion (481) of the extension piece (48) (48) (the peripheral portion of the burner insertion hole (45)) is compared to the tip end portion (480) (480). Burner head (3
Since it is distant from the outer circumference of (0) in the radial direction, the distance between the peripheral edge of the burner insertion hole (45) and the burner head (30) is widened by the distance, and the amount of combustion air is increased.

Item * d In the above invention, "the top plate (41) has the extension pieces (48) (4
8) through its proximal end (481) and further extended ridges (48
2) is formed '', the ridge (482) above.
As a result, the strength of the base end portion (481) of the extension pieces (48) (48) can be improved. Therefore, even if the rubbing tool used when cleaning the top plate (41) hits the extension pieces (48) (48), the extension pieces (48) (48) are not easily deformed.

* E In the above invention, "the ridge (482) is the extension piece (4
8) Extends to the tip (480) of (48) and the top plate (41)
It is also mountain-shaped on the upper surface side of ". In this case, in the structure in which the burner ring (33) is placed on the ridge (482), the burner ring is formed at one place on the ridge (482) in each extension piece (48) (48). (33) is supported. Therefore, as compared with the case where the burner ring (33) contacts at a plurality of points on each extension piece (48) (48),
Rattling of (33) is less likely to occur.

* Item f "Gas burner with maximum calorific value of 4000 Kcal / h or less
Stove case (20) accommodating (31), and the stove case
A top plate (41) that covers the upper opening of (20) and has a burner insertion hole (45) that is fitted on the burner head (30) of the gas burner (31) at a distance of 4 mm or more; A gas stove fitted to the burner head (30) and provided with a burner ring (33) arranged so as to be vertically spaced from the top plate (41), the burner insertion hole By supporting the burner ring (33) from below with a plurality of extension pieces (48) (48) protruding from the peripheral edge of (45) to the upper region thereof, the outer periphery of the burner ring (33) and the top plate (41). ) Vertical spacing of 5mm ~
7 mm, the periphery of the burner insertion hole (45) and the burner ring (33)
The vertical spacing between the burner ring (33) and the top plate (41) is set from 4 mm to 7 mm from the outer periphery of the burner ring (33) through the burner insertion hole (45) to the stove case (20). The primary air for combustion was made to flow through.

According to the above technical means, since the dimensions of the above-mentioned respective parts are set to the above-mentioned values, a large pan is hung on the stove and the gas burner (3
It was confirmed that the primary burner air required for ensuring proper combustion was supplied to the gas burner (31) even if it became difficult for air to flow into the 1) part.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION Next, embodiments of the present invention will be described. The drop-in stove according to this embodiment is
Rectangular box-shaped stove case (20) containing the gas burner (31)
And a top plate (41) covering the upper end open part thereof, a Gotoku (61) mounted on the top plate (41), and a burner ring externally fitted to the burner head (30) of the gas burner (31). It has (33).

The details of each section will be described below. [Stove case (20), gas burner (31), valve device (39)
About] The stove case (20) is formed in the shape of a rectangular box that opens upward, and the hanging flange (2
3) overhangs, and the hanging flange (23) is an opening (13) formed in the countertop (11) of the system kitchen.
It is adapted to be engaged with the peripheral edge of the. In addition, in order to prevent hot air trapped in the stove case (20) from leaking to the space below the countertop (11), almost no holes or the like are formed in the wall of the stove case (20).

The gas burner (31) arranged in the stove case (20) is supported by the support legs (24) and (24) standing upright from the bottom wall of the stove case (20) and the gas burner (31). )
A thermocouple (36) for combustion monitoring is provided in the vicinity of the flame hole (32). Further, the maximum heat generation amount of the gas burner (31) in the illustrated example is set to 4000 Kcal / h, and the outer diameter of the burner head (30) is set to 120 mm.

Further, a valve device (39) supported by support legs (25) is arranged in the stove case (20), and the operation shaft (38) of the valve device (39) is provided with an operation knob (27). A cylindrical body (28) protruding from the back surface is connected via an insertion hole of a top plate (41) described later. Therefore, when the operation knob (27) is operated, the valve device (39) is opened and the ignition device (not shown) is activated to ignite the gas burner (31). In the present embodiment, since the operation part for disposing the operation knob (27) and the like is provided on the top plate (41) as described above, the stove case (20) is provided with the valve device (39). Operation knob on the operation axis (38)
A through hole for inserting the tubular body (28) of (27) is not formed, so that the stove case (20) is highly sealed.

The gas pipe (15) drawn out from the valve device (39) is connected to the nozzle (53) inserted into the gas inlet (35) of the gas burner (31) and is connected to the gas burner (31). At the outer periphery of the insertion part of the nozzle (53) in the primary air port (37) (3
7) is formed, and when gas is ejected from the nozzle (53), the air around it is attracted and flows from the primary air ports (37) (37) to the mixing pipe (55), thereby mixing. An air-gas mixture is created in the tube (55). [Top plate (41)] The top plate (41) that covers the upper opening (21) of the stove case (20) is formed by drawing and punching a single metal plate, and is stored as spillage. Recess for (4
As shown in FIGS. 1 and 2, the bottom plate (44) of (0) has a burner insertion hole (4) which is fitted on the burner head (30) at a predetermined interval.
5) has been opened. The peripheral portion of the burner insertion hole (45) is drawn so as to bend upward from the bottom plate (44) of the recess (40) formed in the top plate (41), whereby the bottom plate ( 44) Tapered cylindrical ridge that stands up from a predetermined angle
(42) is formed. And the tapered tubular ridge
The portion surrounded by the upper edge of the (42) is the burner insertion hole (45). The tapered tubular ridge (42) is formed by
This is to prevent the spilled substance that has flowed down into the recess (40) from leaking into the stove case (20).

In this embodiment, the burner insertion hole (45)
Has a diameter of 146 mm. Therefore, the distance between the burner insertion hole (45) and the burner head (30) is 13 mm.
Becomes In order to ensure proper combustion of the gas burner (31) described later, these burner insertion holes (45) and burner head (3
The interval of 0) may be set to 4 mm or more, but 10 mm
It is desirable to set in the range of -15 mm.

As shown in FIG. 3, the burner insertion hole (4
Three extension pieces (48) (48) project upward from the peripheral edge of (5), and these extension pieces (48) (48) extend to the vicinity of the outer periphery of the burner head (30). Also, the inclination angle of the extension piece (48) is
It matches the inclination angle of the generatrix of the above-mentioned tapered tubular ridge (42).
8) (48) extends straight. In this one, an extension piece
(48) The entire edge of the (48) and the peripheral edge of the burner insertion hole (45) following the edge are hemmed to form an edge bend (43),
As a result, the strength of the extension pieces (48) (48) is improved. The width of the base end portion (481) of the extension piece (48) (the portion where the extension piece (48) is connected to the peripheral edge of the burner insertion hole (45)) is 24 mm.
In addition, the length from the base end (481) of the extension piece (48) is 13
It is set to mm respectively.

FIG. 4 shows the burner insertion hole (45) and the extension piece (4).
8) It is an explanatory view of a processing order for forming (48). To form the burner insertion hole (45) and the extension pieces (48) (48), first, the top plate (41).
As shown in (a) of the figure, the part corresponding to the supporting arm is drawn into a trapezoidal shape, and then the upper surface of the trapezoid is punched into a predetermined shape to form extension pieces (48) (48) as shown in (b). (49) forms (49),
After that, the curving portion (43) is hemmed in the order shown in (c) and (d), and finally, the supporting arm equivalent parts (49) and (49) are the same as the generatrix of the tapered tubular ridge (42). Stand at an angle. Then, as shown in (e), the burner insertion hole (45) and the extension pieces (48) and (48) protruding from the peripheral edge thereof are formed.

In this case, since the extension pieces (48) (48) for supporting the burner ring (33) are projected from the peripheral edge of the burner insertion hole (45), the protrusion (47) is formed as described above. ) It is possible to secure a large protruding height as compared with (47). Also, the top plate
A through hole (not shown) for inserting the tubular body (28) of the operating knob (27) is provided on the instrument operating side of (41), and the tubular body (inserted from the through hole ( 28) is connected to the operating shaft (38) of the valve device (39). [About burner ring (33)] The burner ring (33) fitted onto the burner head (30) has a structure as shown in Fig. 5, and the taper ring portion (330) that rises toward the center and the inner circumference thereof. It is composed of a narrow flat ring portion (331) that slightly juts out horizontally from the entire area toward the burner head (30), and as shown in FIGS. 1 and 2, the flat ring portion is formed.
The (331) is supported from below by the tips (480) (480) of the extension pieces (48) (48). In this embodiment, when the burner ring (33) is supported by the extension pieces (48) (48), the vertical distance between the outer periphery of the burner ring (33) and the top plate (41) is set to about 7 mm. However, the primary air for combustion that is sufficient to ensure proper combustion described below is used for the gas burner.
In order to be supplied to (31), the above vertical distance may be 5 mm or more. Further, in this embodiment, the vertical interval between the burner insertion hole (45) and the burner ring (33) of the top plate (41) is set to 5 mm, but if it is in the range of 4 mm to 7 mm, the gas burner (31) It is possible to supply a sufficient amount of primary air for combustion.

Further, the inner diameter of the burner ring (33) is set to be larger than the outer diameter of the burner head (30) by a set dimension (about 1 mm in this embodiment) in consideration of the dimensional error occurring during manufacturing. The width of the flat ring portion (331) is set to be equal to or slightly larger than the set dimension (in the present embodiment, the dimension of about 1 mm). The flat ring portion (331) is formed in a narrow shape so that most of the spillage from the pan falls on the tapered ring portion (330) so that the spillage flows smoothly downward. is there. In this product, since the flat ring part (331) is supported by the tip parts (480) of the extension pieces (48) (48), the entire burner ring (33) is made to easily flow down the spillage. Unlike the case where the burner ring (33) is formed in a tapered shape, the burner ring (33) can be supported horizontally even if the concentricity between the burner ring (33) and the burner head (30) varies to some extent.

In this case, the inner diameter and the outer diameter of the burner ring (33) are set to 122 mm and 190 mm, respectively. In the case of a gas burner (31) having an outer diameter of the burner head (30) of 84 mm and a maximum combustion amount of 2300 Kcal / h, the inner and outer diameters of the burner ring (33) are 86 m each.
If the diameter of the burner insertion hole (45) is set to 110 mm, the maximum heat generation amount of the gas burner (31) is set to 4000 Kcal / h and the dimensions of the burner head (30) etc. Combustion performance similar to that set as described above can be secured. [About Gotoku (61)] There are two Gotoku (61) in front and back on the top plate (41).
(61) is placed, and each Gotoku (61) is a rectangular Gotoku frame.
(63) and the claw (6
4) It is composed of (64). Also, the Gotoku frame (63) is a top plate (4
Outer peripheral wall of the recess (40) for storing spillage formed in 1)
It is placed on a step (58) formed near the upper end of (57). [Explanation of operation] In this device, when the operating knob (27) is rotated, the valve device (39) is opened to supply gas to the gas burner (31), and an ignition device (not shown) is activated to operate the gas burner (31). 31) is ignited. The flame formed in the flame hole portion (32) heats the thermocouple (36), and the combustion state is monitored by the thermocouple (36).

On the other hand, when the valve device (39) is opened and the gas is ejected from the nozzle (53), the air around it is attracted, and the air is attracted from the primary air ports (37) (37) to the mixing pipe (55). ) Flow into. In addition, as shown by the arrow in FIG. 1, the air in the recess (40) for storing the spillage of the top plate (41) causes the air gap between the outer periphery of the burner ring (33) and the top plate (41) → the burner insertion. The inner periphery of the hole (45) and the gap between the burner head (30) → the stove case (20) → the primary air port (37) of the gas burner (31) flow in this order, and thereby the top plate (41) Outside air is supplied to the primary air port (37).

In this case, the vertical distance between the outer periphery of the burner ring (33) and the top plate (41), the inner diameter of the burner insertion hole (45), etc. are set to the above-mentioned dimensions, and therefore, in FIG. It was confirmed that stable combustion of the gas burner (31) can be secured as shown in (). That is, the vertical direction of FIG. 6 shows the output (mV) of the thermocouple (36). (B) The vertical interval between the outer peripheral edge of the burner ring (33) and the top plate (41) is 2 mm, and the burner insertion hole (4
The vertical distance between the peripheral edge of the burner ring (33) and the burner ring (33) is 2 mm, and the distance between the peripheral edge of the burner insertion hole (45) and the burner head (30) is 10 mm. ) Is the output. In this case, the unstable region (A) generated at the initial stage of ignition is a threshold value L (a value at which the gas burner (31) is forcibly extinguished by the activation of a safety device (not shown), which is usually 3 mV.
The minimum value of the unstable region (A) was about 3.1 mV. On the other hand, in the above embodiment, as shown in (a) in the figure, the unstable region (A) generated at the initial stage of ignition is considerably above the threshold value L, and the unstable region (A It was confirmed that the minimum value of () was about 5.8 mV. Therefore, with this product, even if a large pan is hung on the stove and it becomes difficult for air to flow into the gas burner (31) part, the amount of primary air for combustion required to ensure proper combustion is supplied to the gas burner (31). The gas burner
Stable combustion of (31) is secured. [Modification] In the above embodiment, the extension piece (48) is linearly extended at the same inclination angle as the generatrix of the tapered tubular raised portion (42), but as shown in FIG. After extending the vicinity of the base end part (481) of () once at the same angle as the tapered tubular ridge (42), the tip side can be bent and erected vertically from below the flat ring part (331). It is possible. Incidentally, FIG.
Also, in the case of the one, the entire circumference of the extension pieces (48) (48) and the circumference of the burner insertion hole (45) following the extension pieces (48) are hemmed to form a curved edge (43).
Are formed. Extend the base end (481) of the extension piece (48) horizontally from the periphery of the burner insertion hole (45) in the direction of the burner head (30), and bend the tip side vertically from below the flat ring part (331). It is also possible to stand up (Fig. 8). In the case of FIG. 8 as well, the edge bent portion (43) is formed by hemming the entire peripheral edge of the extension pieces (48) (48) and the peripheral edge of the burner insertion hole (45) following this. As shown in FIGS. 9 and 10, the top plate (41) has an extension piece.
(48) To form a continuous ridge (482) by a convex diaphragm so as to extend from the distal end (480) of the (48) to the base end (481) thereof to the tapered tubular ridge (42). Is also possible. In this way, the projection piece (482) causes the extension piece to
(48) The strength of (48) can be improved.

9 and 10, the ridges (482) are mountain-shaped on the upper surface side of the top plate (41), but a valley-shaped depression is formed on the lower surface side. it can. In addition, extension piece (4
A ridge (482) which does not reach the tip of 8) may be formed. That is, the taper tubular ridge (4) passes through the base end (481) from a position displaced from the tip end (480) of the extension piece (48) to the base end (481) side.
It is also possible to form a ridge (482) extending to 2).

However, as shown in FIGS. 9 and 10, a convex strip (482) is formed on the upper surface of the top plate (41) and extends to the tip (48) of the extension piece (48). Burner ring on ridge (482)
In the case where the (33) is placed, the burner ring (33) is supported at one of the peak-shaped peaks of the protrusions (482) in each of the extension pieces (48) and (48). Therefore, rattling of the burner ring (33) is less likely to occur than in the case where the burner ring (33) is in contact with the extension pieces (48) (48) at a plurality of locations. Also, ridges
Since the (482) extends to the tip of the extension piece (48), the height of the ridge (482) can be increased as compared with the case where it does not extend to the tip. That is, the ridge (482) is an extension piece.
If it does not extend to the tip of (48), it is necessary to form the ridge (482) by drawing, and the drawing height cannot be made too large for the reasons described above. On the other hand, when the ridge (482) extends to the tip of the extension piece (48), the ridge (482) is bent by bending the extension piece (48).
Since the ridge can be formed, the height of the ridge (482) can be made higher than that in the case of the drawing process. Therefore, the strength of the extension piece (48) can be further improved by the amount of height of the ridge (482).

In the structure shown in FIGS. 9 and 10, the ridges are formed with reference to both ends of the extension piece (48) in the width direction.
When the (482) is bent upward in a mountain shape, the gas burner (31) and the top plate (41) are further increased by the amount corresponding to the height of the protrusion of the ridge (482).
The vertical spacing of is large. The same structure as that of the above modification can be applied to the extension piece (48) of the modification described in the above. That is, the protrusion (482) as shown in FIG. 9 extending from the distal end (480) of the extension piece (48) or the proximal end (418) side to the tapered tubular ridge (42) is provided with the extension piece (48). To form. Also in this case, the convex strips (482) may be mountain-shaped on the upper surface side of the top plate (41) or may be recessed on the lower surface side in a valley shape. If the only purpose is to improve the strength of the extension pieces (48) (48), it is necessary to adopt both the edge bend (43) formed by hemming the peripheral edge and the ridge (482). Not,
Either one of these may be adopted. In the above embodiment, the present invention is applied to the drop-in stove attached to the countertop (11) of the system kitchen, but it is needless to say that the present invention can be applied to the table stove that is used by being placed on the cooking table or the like. Yes. In the above embodiment, 4000 Kcal / h and 2
We have described a drop-in stove that incorporates a gas burner (31) with a maximum calorific value of 300 Kcal / h. However, if the size of each part is set as described above, a gas burner with a maximum calorific value smaller than each of the above-mentioned maximum calorific values is used. Also in the case of the drop-in stove incorporating (31), the same combustion performance as described above can be secured. This is because the smaller the maximum calorific value of the gas burner, the smaller the amount of temporary air required. 7, 8 and 10 show the case where the outer peripheral lower edge of the burner ring (33) is located above the peripheral edge of the burner insertion hole (45). Similar to the second structure, the lower peripheral edge of the burner ring (33) may be located lower than the peripheral edge of the burner insertion hole (45). By doing so, the burner insertion hole (45) is more surely hidden by the burner ring (33) and is more difficult to be seen from the outside, and it is possible to avoid the unsightlyness due to the burner insertion hole (45) being seen from the outside.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a drop-in stove according to an embodiment of the present invention mounted on a countertop (11) of a system kitchen.

FIG. 2 is an enlarged sectional view of a II-II line in FIG.

FIG. 3 is a plan view of the vicinity of the burner insertion hole (45) in the top plate (41).

FIG. 4 is an explanatory view of a process of processing the extension piece (48).

FIG. 5 is a sectional perspective view of the burner ring (33).

FIG. 6 is a graph showing a combustion state of the gas burner (31) incorporated in the drop-in stove according to the embodiment of the present invention.

FIG. 7 is a sectional view of an essential part showing a first modified example of the extension piece (48).

FIG. 8 is a sectional view of an essential part showing a second modification of the extension piece (48).

FIG. 9 is a perspective view showing a third modification of the extension piece (48).

FIG. 10 is a sectional view of an essential part showing a third modification of the extension piece (48).

FIG. 11 is an explanatory diagram of a conventional example.

FIG. 12 is an explanatory diagram of a conventional example.

[Explanation of symbols]

(20) ・ ・ ・ Stove case (30) ・ ・ ・ Burner head (31) ・ ・ ・ Gas burner (33) ・ ・ ・ Burning (41) ・ ・ ・ Top plate (42) ... Tapered tubular ridge (45) ・ ・ ・ Burner insertion hole (48) ... extension piece (480) ・ ・ ・ Tip (481) ・ ・ ・ Base end (482)

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Claims (7)

(57) [Claims] 1. A stove case containing a gas burner (31).
(20) and a top plate which is provided with a burner insertion hole (45) which covers the upper opening of the stove case (20) and is fitted onto the burner head (30) of the gas burner (31) at a distance. (41) and a burner ring which is fitted onto the burner head (30) and is arranged so that a vertical gap is formed between the top plate (41).
A gas stove including (33), wherein the burner ring (33) is supported from below by a plurality of extension pieces (48) (48) protruding from the peripheral edge of the burner insertion hole (45) to an upper region thereof. . 2. A burner insertion hole (45) is formed inside a top edge of a downwardly expanding tapered cylindrical ridge (42) formed by squeezing a part of the top plate (41). The gas stove according to claim 1, wherein the extension piece (48) is extended at the same inclination angle as the generatrix of the tapered tubular raised portion (42). 3. A corner portion between the peripheral edge of the burner insertion hole (45) and a base end portion (481) of the extension piece (48) and an outer peripheral edge of the extension piece (48) are hemmed around these edges. The gas stove according to claim 1 or 2, wherein a curved edge portion (43) formed by processing is formed. 4. A tip portion (480) of the extension piece (48) is located closer to the burner head than a base end portion (481) of the extension piece (48) and extends to a portion near an outer periphery of the burner head (30). The burner ring (33) is composed of a tapered ring portion that rises toward the center and a flat ring portion that slightly protrudes horizontally from the inner circumference and is supported from below by the tip portions (480) (480). The gas stove according to any one of claims 1 to 3. 5. The top plate (41) is provided with a ridge (482) further extended from the extension piece (48) (48) through the base end portion (481) thereof. The gas stove according to claim 4. 6. The ridge (482) is provided with the extension pieces (48) (48).
The gas stove according to claim 5, wherein the gas stove extends to the front end portion (480) and has a mountain shape on the upper surface side of the top plate (41). 7. A stove case (20) accommodating a gas burner (31) having a maximum calorific value of 4000 Kcal / h or less, a burner head (20) for covering the upper end opening of the stove case (20) and for the gas burner (31). Top plate (41) with a burner insertion hole (45) opened at 30) with an interval of 4 mm or more
And a burner ring externally fitted to the burner head (30) and arranged so as to form a vertical gap between the burner head (30) and the top plate (41).
A gas stove including (33), wherein the burner ring (33) is supported from below by a plurality of extension pieces (48) (48) protruding from the peripheral edge of the burner insertion hole (45) to an upper region thereof. The vertical distance between the outer circumference of the burner ring (33) and the top plate (41) by 5
mm to 7 mm, and the vertical interval between the peripheral edge of the burner insertion hole (45) and the burner ring (33) is set to 4 mm to 7 mm, respectively, and from the outer circumference of the burner ring (33) to the top and bottom of the top plate (41). From the burner insertion hole (45) through the gap to the stove case
(20) A gas stove in which primary air for combustion flows.