JP2009228913A - Falling-off preventive structure of heat ring - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a falling-off preventive structure of a heat ring capable of preventing the heat ring from easily slipping out of a side wall of a combustion chamber. <P>SOLUTION: The combustion chamber 3 is arranged in a body casing 1, and an exhaust flue 4 is arranged for exhausting exhaust gas. A vertically penetrating cookstove opening 14c is formed in a top plate part 14 of the body casing 1. An upper end part of a side wall 31 is positioned on the upper side of the top plate part 14 by inserting the substantially cylindrical side wall 31 of the combustion chamber 3 into the cookstove opening 14c, and a clearance is formed between the inner edge of the cookstove opening 14c and the side wall 31. The heat ring 5, arranged in an upper end opening 31b of the side wall 31 of the combustion chamber 3, is formed of a skirt part 51 fitted inside the upper end opening 31b and a flange part 52 continuously arranged outside from an upper end part of the skirt part 51. A falling-off preventive means 6 is arranged for preventing the heat ring 5 from falling off from the upper end part of the side wall 31 of the combustion chamber 3. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a structure for preventing a heat ring of a gas low range (gas stove) from falling off.

  Conventionally, a gas low range (gas stove) using a fuel gas such as city gas has been used. In the gas low range, a gas burner is provided in the main body casing, and five virtues are provided on the top plate portion of the main body casing above the gas burner, and a cooking container is placed on the five victories to perform cooking by heating. The Gotoku has a plurality of Gotoku claws arranged at intervals in the circumferential direction. The cooking vessel is placed on the upper surface of the Gotoku nail and the flame of the gas burner is applied to the bottom of the cooking vessel to heat it. Exhaust gas is discharged from the gap between the five virtue claws to the surroundings, and the side surface of the cooking container is heated.

  In this gas low range, high temperature exhaust gas is discharged to the surroundings, so that the wall surface of the room is heated and damaged by the high temperature exhaust gas, or the user is exposed to the hot air of the exhaust gas. It was.

Then, what provided the heat ring instead of the five virtues which consisted of the above several virtues so that high temperature exhaust gas was not discharged | emitted to the circumference | surroundings was considered (for example, refer patent document 1). This is provided with a substantially annular heat ring at the upper end of the side wall of the substantially cylindrical combustion chamber.When the cooking container is placed on the heat ring, the entire circumference of the heat ring and the bottom surface of the cooking container are It is possible to close the upper end opening of the combustion chamber closely so that hot exhaust gas is not discharged to the surroundings. An exhaust flue is connected to the combustion chamber, and the exhaust gas is discharged through the exhaust flue.
JP 7-318064 A

  In such a conventional gas low range, since all the high-temperature exhaust gas generated in the combustion chamber in the main body casing is exhausted through the exhaust flue in the main body casing, the surface of the main body casing becomes hot, and the user There is a risk of burns when touching the top plate of the main casing. For this reason, the thing which flows air along the top-plate part of a main body casing and cools a top-plate part was considered.

  As shown in FIG. 1, FIG. 2, etc., the gap 14b is formed between the side wall 31 of the combustion chamber 3 and the inner end edge of the stove opening 14a formed in the top plate portion 14. Cooling air flows from the inside of the main body casing 1 through the gap 14b between the stove opening 14a of the top plate portion 14 and the side wall 31 of the combustion chamber 3, and flows along the main body casing 1 to the top plate. The part 14 can be cooled.

  By the way, the heat ring 5 includes a skirt portion 51 fitted inside the upper end opening of the combustion chamber 3 as shown in FIG. 6 and a flange portion 52 provided continuously from the upper end portion of the skirt portion 51 to the outside. The skirt portion 51 is fitted inside the upper end portion of the side wall 31 of the combustion chamber 3, and the flange portion 52 is placed on the upper end surface of the side wall 31. It is attached to the upper end of the side wall 31 of the combustion chamber 3. The width W of the flange portion 52 of the heat ring 5 is longer than the thickness T of the side wall 31 of the combustion chamber 3, and the cooking container N can be stably placed on the flange portion 52 of the heat ring 5. The heat from the combustion chamber 3 is easily transmitted to the cooking vessel N via the flange portion 52.

  However, since the skirt portion 51 of the heat ring 5 is fitted and attached to the upper end opening of the side wall 31 of the combustion chamber 3 as described above, the cooking container N is placed on the heat ring 5 or on the heat ring 5. When the cooking container N placed on is pulled up and lifted, if the load of the cooking container N is concentrated on the outer edge of the heat ring 5 as shown in FIG. There is a possibility that the heat ring 5 may fall off from the side wall 31 due to the fitting to 31 being removed.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a structure for preventing the heat ring from falling off, which can prevent the heat ring from easily coming off the side wall of the combustion chamber. There is to do.

  In order to solve the above-mentioned problem, the invention according to claim 1 is provided with a combustion chamber 3 provided with a gas burner 2 in the body casing 1 and an exhaust flue 4 for discharging exhaust gas from the combustion chamber 3. A generally circular stove opening 14a is formed in the top plate portion 14 of the main body casing 1 so as to penetrate vertically, and the substantially cylindrical side wall 31 of the combustion chamber 3 is inserted into the stove opening 14a. The upper end portion of the side wall 31 is positioned above the top plate portion 14, and the space 10 in the main body casing 1 and the top plate portion 14 are disposed between the inner end edge of the stove opening 14 a and the side wall 31 of the combustion chamber 3. A heat ring 5 that closes the upper end opening 31b of the side wall 31 of the combustion chamber 3 when the cooking container N is placed on the upper surface is provided at the upper end of the side wall 31 of the combustion chamber 3, The heat ring 5 is connected to the inside of the upper end opening 31b of the combustion chamber 3. The skirt part 51 is inserted into the skirt part 51, and the flange part 52 is provided on the outer side from the upper end part of the skirt part 51. A drop prevention means 6 is provided for preventing the drop off from the part.

  By adopting such a configuration, even when the load of the cooking container N is concentrated on the outer edge of the heat ring 5, the heat ring 5 is prevented from being detached from the side wall 31 of the skirt portion 51 and falling off. can do.

  Further, the invention according to claim 2 is the invention according to claim 1, wherein the insertion vertical groove 61a formed on the skirt portion 51 of the heat ring 5 from the lower end thereof upward and the insertion vertical groove 61a. The locking lateral groove 61b formed from the upper end portion to the side and the protrusion 62 projecting from the inner surface of the upper end portion of the side wall 31 of the combustion chamber 3 constitute the drop-off prevention means 6. It is what.

  By adopting such a configuration, the drop-off preventing means 6 can be made simple, and the heat ring 5 can be easily attached to and detached from the combustion chamber 3.

  In the present invention, even if the load of the cooking container is concentrated on the outer edge of the heat ring, it is possible to prevent the heat ring from coming off from the side wall of the skirt portion and falling off.

  Hereinafter, the gas low range (gas stove) of this invention is demonstrated based on embodiment shown to drawing. 1 is a perspective view of a gas low range, and FIGS. 2 to 4 are a side view, a plan view, and a front view, respectively.

  The gas low range is provided with a combustion chamber 3 in which a gas burner 2 is accommodated in a main body casing 1 serving as an outer shell, and an air flow path cylinder portion 45 in which an exhaust flue 4 described later is accommodated in a rear end portion of the main body casing 1. The main body is configured by protruding.

  The main body casing 1 is configured by joining a front plate part 11, side plate parts 12 on both sides, a back plate part 13 and a top plate part 14 into a rectangular box shape (but no bottom plate) by welding or the like. In addition, each plate portion is formed of a metal such as SUS (for example, SUS430). Further, leg portions 15 project from the lower end portions of the front plate portion 11, the side plate portion 12, and the back plate portion 13, and the front plate portion 11, the side plate portion 12, A lower end portion of the back plate portion 13 is disposed.

  The top plate portion 14 is formed with a substantially circular shaped stove opening 14a penetrating vertically in a portion where the combustion chamber 3 in the substantially central portion is disposed. More specifically, as will be described later, the combustion chamber 3 is a space surrounded by a substantially cylindrical side wall 31, and is inserted into the substantially circular shaped stove opening 14 a at a substantially central portion of the substantially cylindrical side wall 31. It is arrange | positioned in the state made. Further, the gap 14b between the inner edge of the stove opening 14a of the top plate 14 and the side wall 31 of the combustion chamber 3 is a space 10 in the main body casing 1 (however, excluding the combustion space 30 in the combustion chamber 3). (The same applies hereinafter) and the atmosphere above the top plate portion 14 communicate with each other.

  The front plate part 11 is provided with an operation part 17 for igniting the gas burner 2, adjusting the thermal power, and extinguishing the fire, and the user can operate the operation part 17 from the front side of the main body casing 1. The front plate portion 11 is formed with an air intake hole 11 a for taking air into the space 10 in the main body casing 1 from the outside of the main body casing 1.

  The back plate portion 13 has left and right end portions joined to the rear end portions of the both side plate portions 12, respectively. The front plate portion 11, both side plate portions 12, the back plate portion 13, and the top plate portion 14 as described above. The main casing 1 is constituted by the above. Moreover, in this embodiment, the juice receiver 16 is arrange | positioned between the leg parts 15 on the right and left sides of the lower end part of the main body casing 1. Further, an air flow path cylinder portion 45 in which the exhaust cylinder portion 40 is accommodated projects from the rear end portion of the top plate portion 14.

  A combustion chamber 3 is disposed in the main body casing 1. In the combustion chamber 3, the inside surrounded by the side wall 31 becomes the combustion space 30. In this embodiment, the side wall 31 is made of a metal such as a substantially cylindrical SUS (for example, SUS430). The lower end of the side wall 31 of the combustion chamber 3 is opened to form a lower end opening 31a. The combustion space 30 in the combustion chamber 3 communicates with the space 10 in the main casing 1 through the lower end opening 31a. Thus, the secondary air when the gas burner 2 burns flows into the combustion chamber 3 from the lower end opening 31a. A gas burner 2 is disposed in the combustion chamber 3. In the present embodiment, the combustion section 21 of the gas burner 2 is disposed in the vicinity of the lower end of the combustion chamber 3 and the mixing tube 22 is located below the combustion chamber 3 (that is, below the lower end of the side wall 31 of the combustion chamber 3). However, if at least the combustion section 21 is located in the combustion chamber 3 (that is, above the lower end of the side wall 31 of the combustion chamber 3), the exhaust gas generated in the combustion chamber 3 is at the lower end of the combustion chamber 3. Since it is not discharged | emitted from the opening 31a, it does not matter. Further, the main body casing 1 is provided so as to expose a pipe connection port 18 to which a downstream end of a gas supply pipe (not shown) made of a rubber hose or the like is exposed. 22 is connected by a gas supply pipe (not shown).

  In the combustion chamber 3, a seed fire burner 23 is disposed in the vicinity of the combustion portion 21 of the gas burner 2. The seed fire burner 23 is provided with a heat sensitive part composed of a thermocouple or the like. When the operation part 17 is operated to perform an ignition operation, the seed fire burner 23 is ignited by the piezoelectric spark, and the heat sensitive part is sufficiently heated. When a temperature higher than a predetermined temperature is detected, the gas supply path to the gas burner 2 is opened to supply gas, and the gas burner 2 is ignited to start combustion. Further, when the flame disappears, a temperature higher than a predetermined temperature is not detected by the heat sensitive part, the gas supply path is closed, and combustion is stopped.

  A heat ring 5 which will be described in detail later is provided at the upper end of the side wall 31 of the combustion chamber 3. The heat ring 5 is made of metal such as SUS (for example, SUS304), the upper surface is a flat surface, and the cooking container N is placed on this surface. The portion provided with the heat ring 5 at the upper end of the side wall 31 of the combustion chamber 3 is located above the top plate portion 14, and when the cooking container N is placed on the heat ring 5, The bottom surface does not come into contact with the top plate portion 14. When the cooking container N is placed on the heat ring 5, the upper end opening 31 b of the side wall 31 of the combustion chamber 3 is closed by the cooking container N.

  A discharge port 32 for discharging exhaust gas generated in the combustion chamber 3 is formed in the rear part of the side wall 31 of the combustion chamber 3, and an exhaust pipe whose inside becomes the exhaust flue 4 is formed in the discharge port 32. The front end of the part 40 is connected.

  The exhaust cylinder part 40 extends from the side wall 31 of the combustion chamber 3 to the vicinity of the horizontal cylinder part 41 protruding substantially horizontally toward the rear of the space 10 in the main body casing 1 and the back plate part 13 of the horizontal cylinder part 41. And a vertical cylindrical portion 42 protruding upward from the rear end portion. The upper part of the vertical cylinder part 42 from the top plate part 14 is accommodated in the air channel cylinder part 45, and the upper end opening 43 of the vertical cylinder part 42 is located near the upper end of the air channel cylinder part 45. Communicate with the atmosphere. Further, a heat insulating material 44 made of a gypsum board or a glass wool molding material is provided on the outer surface of the exhaust tube portion 40. In the present embodiment, the inside of the air flow path cylinder 45 is a double structure of the flow path outside the vertical cylinder 42 and the exhaust flue 4 inside the vertical cylinder 42 in the air flow path cylinder 45. It has become. A flow path inside the air flow path cylinder 45 and outside the vertical cylinder 42 is a cooling flow path 46 for cooling the vertical cylinder 42 by flowing air in the space 10 in the main body casing 1 upward. It has become. In addition, a drift cover 47 is provided at the upper end of the air flow path cylinder 45 so that the flow of exhaust air flowing through the exhaust flue 4 and the flow of cooling air flowing through the cooling flow path 46 are drifted forward. .

  When the combustion of the gas burner 2 starts, the high-temperature exhaust gas generated by the combustion rises in the combustion chamber 3 and heats the bottom surface of the cooking vessel N and the heat ring 5. The exhaust gas heats the bottom surface of the cooking vessel N by an exhaust draft, a draft due to a temperature difference, or a draft generated by gas ejection from the gas burner 2, and then flows backward from the combustion chamber 3 to the exhaust cylinder portion 40 from the exhaust port 32. Into the exhaust flue 4 (see arrow b in FIG. 2), discharged from the upper end opening 43, and collected in an exhaust hood (not shown) disposed above the gas low range to the outside of the section. And exhausted.

  The air outside the main body casing 1 flows into the space 10 in the main body casing 1 from the air intake holes 11 a formed in the front plate portion 11.

  A part of the air flowing into the space 10 in the main casing 1 flows into the combustion chamber 3 from the lower end opening 31a of the combustion chamber 3 (see arrow G in FIG. 2) and is used as secondary air of the gas burner 2. It is discharged from the discharge port 32 together with the exhaust gas. Then, another part of the cooling air flowing into the space 10 in the main body casing 1 is transferred to the atmosphere above the top plate portion 14 through the gap 14b between the top plate portion 14 and the side wall 31 of the combustion chamber 3. (Refer to the arrow in FIG. 2). Thus, by providing a gap (that is, the gap 14 b) between the side wall 31 of the combustion chamber 3 and the top plate portion 14 and thermally cutting it, heat in the combustion chamber 3 is not conducted to the top plate portion 14. In addition, it is possible to achieve a further cooling effect by flowing cooling air through the gap 14b.

  Further, since the heat ring 5 (the upper end portion of the side wall 31 of the combustion chamber 3) is located above the top plate portion 14 of the main body casing 1, the cooking container N is placed when the cooking container N is placed on the heat ring 5. The bottom surface of N is in contact with the top plate portion 14 so that the top plate portion 14 is not heated, and it is possible to further suppress the top plate portion 14 from being heated.

  Next, the heat ring 5 will be described. As shown in FIG. 5, the heat ring 5 includes a skirt portion 51 that is fitted inside the upper end opening 31 b of the combustion chamber 3, and a flange portion 52 that is provided on the outer side from the upper end portion of the skirt portion 51. It has an inverted L-shaped cross section. The outer diameter of the skirt portion 51 is substantially the same as the inner diameter of the side wall 31 of the combustion chamber 3. The flange portion 52 has a substantially annular shape similar to that of the side wall 31 of the combustion chamber 3 in plan view, and the inner peripheral edge substantially coincides with the inner peripheral edge of the side wall 31, but the outer peripheral edge is outside the outer peripheral edge of the side wall 31. The flange portion 52 is formed so that the width of the flange portion 52 is longer than the thickness of the side wall 31. In this way, by increasing the contact area of the flange portion 52 with the cooking vessel N, the cooking vessel N can be stably placed on the flange portion 52 of the heat ring 5, and both via the flange portion 52. Heat from the combustion chamber 3 is easily transmitted to the cooking container N.

  The heat ring 5 is attached to the upper end portion of the side wall 31 by fitting the skirt portion 51 inside the upper end portion of the side wall 31 of the combustion chamber 3 and placing the flange portion 52 on the upper end surface of the side wall 31. However, in the present invention, the drop prevention means 6 is provided so that the heat ring 5 is not easily detached.

  The drop-off preventing means 6 includes a groove (notch) 61 formed at the lower end portion of the skirt portion 51 of the heat ring 5 and a protruding portion 62 protruding from the inner surface of the upper end portion of the side wall 31. The groove 61 includes an insertion vertical groove 61a formed upward from the lower end portion of the skirt portion 51, and a locking horizontal groove 61b formed laterally from the upper end portion of the insertion vertical groove 61a. The insertion vertical groove 61a has a lower end opened downward and is formed halfway up to the upper end of the skirt 51, and the locking horizontal groove 61b communicates laterally from the upper end of the insertion vertical groove 61a. ing. In the embodiment shown in FIG. 5, the locking lateral groove 61b is formed on one side from the upper end of the insertion vertical groove 61a to form the substantially inverted L-shaped groove 61, but the insertion vertical groove 61a is formed. The substantially horizontal T-shaped groove 61 may be formed by forming the locking lateral groove 61b on both sides from the upper end of the upper end of the upper end portion, and the shape is not particularly limited.

  The protrusion 62 is formed at a height at which the locking lateral groove 61 b is located when the heat ring 5 is attached to the upper end of the side wall 31. The diameter of the protrusion 62 is formed to be substantially the same as or slightly smaller than the groove width of the insertion vertical groove 61a and the locking horizontal groove 61b.

  In order to attach the heat ring 5 to the upper end of the side wall 31, the vertical groove 61 a for insertion of the heat ring 5 and the protrusion of the side wall 31 are aligned, and the skirt 51 is fitted into the upper end opening 31 b and the protrusion 62. Is inserted into the insertion longitudinal groove 61a. When the flange 52 is brought into contact with the upper end surface of the side wall 31, the protrusion 62 is positioned at the side end of the locking lateral groove 61b. Therefore, the heat ring 5 is rotated to cause the protrusion 62 to move to the locking lateral groove. The protrusion 62 and the groove 61 are engaged with each other by moving in the lateral direction 61b.

  With the above configuration, even when the load of the cooking container N is concentrated on the outer edge of the heat ring 5, the heat ring 5 is detached from the side wall 31 of the skirt portion 51 and falls off. Can be prevented. By providing the protrusion 62 at the rear end of the side wall 31 of the combustion chamber 3, it is possible to effectively prevent the cooking container N from coming off when pulling the cooking container N forward, but in addition, the front end of the side wall 31, It may be provided on the left-right side, and it is more effective to provide a plurality in the circumferential direction.

  Further, the simple structure of the groove 61 and the protrusion 62 can be used as the drop-off preventing means 6 and the heat ring 5 can be easily attached to and detached from the combustion chamber 3.

  In addition to the above, as the drop-off prevention means 6, for example, although not shown, a groove is formed in the middle portion in the vertical direction of the skirt portion 51 of the heat ring 5, and the inner surface of the upper end portion of the side wall 31 of the combustion chamber 3 A projecting part that can be freely projected and retracted is provided, the projecting part is immersed in the inner surface of the side wall 31, and the skirt part 51 is fitted. When the fitting is completed, the position of the projecting part and the groove matches, and the projecting part protrudes into the groove. It may be engaged.

It is a whole perspective view of one embodiment of the gas low range of the present invention. It is a side view same as the above. It is a top view same as the above. It is a front view same as the above. (A) is a disassembled perspective view of the side wall and heat ring of a combustion chamber which faces upward from a top plate part, (b) is the perspective view which attached the heat ring to the side wall of the combustion chamber in (a). In a prior art example, it is a disassembled perspective view of the side wall of a combustion chamber and heat ring which face upwards from a top plate part. It is a sectional side view explaining the case where the load of a cooking container is applied to the outer end part of a heat ring in the same as the above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main body casing 11 Front plate part 11a Air intake hole 12 Side plate part 13 Back plate part 14 Top plate part 14a Stove opening 14b Gap 15 Leg part 16 Juice receiver 17 Operation part 18 Pipe connection port 2 Gas burner 21 Combustion part 22 Mixing pipe 23 Seed burner 3 Combustion chamber 30 Combustion space 31 Side wall 31a Lower end opening 31b Upper end opening 32 Discharge port 4 Exhaust flue 40 Exhaust cylinder part 41 Horizontal cylinder part 42 Vertical cylinder part 43 Upper end opening 44 Heat insulating material 5 Heat ring 51 Skirt part 52 Flange Part 6 Drop-off prevention means 61 Groove 61a Insertion longitudinal groove 61b Locking lateral groove 62 Projection part 7 Air channel tube part N Cooking container

Claims (2)

  A combustion chamber provided with a gas burner is disposed in the main body casing, and an exhaust flue for exhausting exhaust gas from the combustion chamber is disposed, and the top plate portion of the main body casing has a substantially circular shape that penetrates vertically. A stove opening is formed, and the substantially cylindrical side wall of the combustion chamber is inserted into the stove opening so that the upper end of the side wall is located above the top plate, and the inner edge of the stove opening and the combustion chamber A gap is formed between the side wall and the space in the main body casing and the upper side of the top plate, and the heat ring that closes the upper end opening of the side wall of the combustion chamber is burned when the cooking container is placed on the upper surface. The side cross-section reverse L which is provided in the upper end of the side wall of a chamber, and the said heat ring is comprised from the skirt part inserted inside the upper end opening of a combustion chamber, and the flange part connected outside from the upper end part of this skirt part The heat ring is formed in a letter shape and the upper end of the side wall of the combustion chamber Falling-off prevention structure of the heat ring, characterized by comprising providing a drop-off prevention means for preventing from falling off.   An insertion vertical groove formed on the skirt portion of the heat ring from the lower end thereof upward, a locking lateral groove formed from the upper end of the insertion vertical groove to the side, and a side wall of the combustion chamber 2. The heat ring drop-off preventing structure according to claim 1, wherein a drop-off preventing means is constituted by a protrusion protruding from the inner surface of the upper end.

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