JP2014095521A - Gas cooking stove - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas cooking stove capable of increasing flow velocity of exhaust gas heating a peripheral surface of a trunk part on a rear side of a cylindrical pot, and capable of improving thermal efficiency.SOLUTION: A gas cooking stove 1 includes a cooking stove body 2, a combustion gas burner 4 disposed in a combustion chamber 3 in the cooking stove body 2, and a trivet 5 provided around an upper end opening 32 of the combustion chamber 3 and allowing exhaust gas from the combustion chamber 3 to flow out mainly from the rear part when a cylindrical pot P is placed. The gas cooking stove 1 has a pair of side wall parts 8 upwardly protruded from both side ends of a top plate part 24 of the cooking stove body 2 and arranged to be separated from each other in such a manner of not being brought into contact with a peripheral surface of a trunk part of the cylindrical pot P. The pair of the side wall parts 8 has a front end positioned between a boundary line M dividing the trivet 5 into a front half and a rear half and a front end of the cooking stove body 2, and has a recession 81 recessed inward on a wall surface on the cylindrical pot P side.

Description

  The present invention relates to a gas stove.

  2. Description of the Related Art Conventionally, a gas stove that burns a combustion gas such as city gas and uses it as a heat source for cooking is known.

  For example, Patent Literature 1 discloses a gas stove having a stove body, a combustion gas burner provided in the stove body, and five virtues provided around the combustion gas burner. In this gas stove, the five virtues are composed of a claw portion disposed on the rear side of the stove body and a heat plate portion disposed on the front side of the stove body. Therefore, in this gas stove, when cooking is performed by placing a small pan on Gotoku, the exhaust gas does not flow forward by the hot plate portion, but flows upward from the rear.

JP 2006-46884 A

  However, the conventional gas stove has room for improvement in the following points. In other words, the gas stove having a conventional structure can heat the circumferential surface of the body portion on the rear side of the pancake pan by the exhaust gas rising from the back of the virtues. However, the conventional gas stove does not sufficiently consider the flow of the exhaust gas, and the exhaust gas flow rate becomes insufficient due to the diffusion of the exhaust gas, and it is difficult to improve the thermal efficiency.

  The present invention has been made in view of the above-described background, and is obtained by providing a gas stove that can increase the flow rate of exhaust gas that heats the circumferential surface of the body portion on the rear side of the size pan and improve the thermal efficiency. It is a thing.

One aspect of the present invention is provided around a stove main body, a combustion gas burner provided in a combustion chamber in the stove main body, and an upper end opening of the combustion chamber, and when a small pan is placed A gas stove having five virtues that mainly discharge exhaust gas from the combustion chamber from behind,
It protrudes upward from both side edges of the top plate portion of the stove body, and has a pair of side wall portions arranged apart from each other so as not to come into contact with the circumferential surface of the trunk portion of the pan.
The pair of side wall portions are arranged between a boundary line separating the front half and the rear half of the five virtues and a front edge portion of the stove body, and a wall is formed on the wall on the side of the pan. A gas stove having a recess recessed inward (Claim 1).

  Since the gas stove has the five virtues having the above-described configuration, when a small pan is placed on the five virtues, the exhaust gas from the combustion chamber mainly flows out from the rear and rises from the rising exhaust gas. It is possible to heat the peripheral surface of the body portion on the rear side of the short-sized pan by the heat transfer.

  Here, the said gas stove has a pair of side wall part provided with the said structure. For this reason, the gas stove can increase the flow rate of the exhaust gas rising from the combustion chamber and flowing out from the combustion chamber by air flowing from the front through the recess of the side wall portion to the rear of the shell pan due to the draft effect of the exhaust gas. And when the flow rate of exhaust gas rises, the said gas stove becomes possible to heat the trunk | drum peripheral surface of the back side of a cased pan efficiently, and can improve thermal efficiency.

  Therefore, according to this invention, the gas stove which can raise the flow velocity of the exhaust gas which heats the trunk | drum peripheral surface of the back side of a size pan, and can improve thermal efficiency can be provided.

It is a perspective view of the gas stove of Example 1. FIG. 2 is a schematic II-II cross-sectional view of the gas stove of Example 1. FIG. It is the enlarged view which expanded and showed the five virtue of the gas stove of Example 1. FIG. It is IV-IV sectional drawing of the five virtue of the gas stove of Example 1. FIG. It is VV sectional drawing of the five virtue of the gas stove of Example 1. FIG. It is VI-VI sectional drawing of the five virtue of the gas stove of Example 1. FIG. It is a perspective view of the side wall part (right side) in the gas stove of Example 1. FIG. 1 is a plan view of a gas stove according to Embodiment 1. FIG. It is a perspective view of the gas stove of Example 1 concerning a modification. It is typical XX sectional drawing of the gas stove of Example 1 shown in FIG. It is a top view of the gas stove of Example 1 shown in FIG.

  In the gas stove, the front side in the depth direction from the boundary line M (see FIG. 8) that bisects the five victories in the direction perpendicular to the stove depth direction is the front side, and the back side in the depth direction from the boundary line M is the rear side. The installation surface side such as the floor where the gas stove is installed is set downward, and the opposite direction is set upward. The left and right sides of the gas stove are based on the gas stove viewed from the front.

  In the gas stove, the deepest portion of the recess in the recess may be disposed at a position overlapping the boundary line (claim 2).

  In this case, the balance between the flow of air into the recess from the front and the outflow of air flowing into the recess is good. Therefore, in this case, it is easy to increase the flow rate of the exhaust gas, it becomes easy to efficiently heat the circumferential surface of the body part on the rear side of the short drum pan, and it becomes easy to improve the thermal efficiency. More preferably, the deepest part of the recess of the recess is arranged at a position that coincides with the boundary line. In this case, the balance between the flow of air into the recess from the front and the outflow of air flowing into the recess is excellent.

  In the gas stove, the cross-sectional shape of the recess when cut along a plane substantially parallel to the top plate is preferably a line-symmetric shape with the boundary line as the axis of symmetry.

  In this case, the balance between the flow of air into the recess from the front and the outflow of air flowing into the recess is excellent. Therefore, in this case, the flow rate of the exhaust gas can be increased more easily, the body peripheral surface on the rear side of the size pan can be more efficiently heated, and the thermal efficiency can be further improved.

  In the gas stove, the recess may have a pair of inclined surfaces that are inclined toward the deepest part of the recess of the recess.

  In this case, the surface of the recess can be configured relatively easily by the pair of inclined surfaces. Therefore, in this case, a gas stove that achieves the above-described effects can be obtained relatively easily.

  In the gas stove, the upper end edge of the recess may be disposed below the upper end edge of the side wall (Claim 5).

  In this case, the wall surface of the side wall part in which the recessed part is not formed is located above the upper end edge of the recessed part. Therefore, in this case, it is possible to suppress the air that has flowed into the concave portion from flowing upward from the upper end portion of the concave portion, and the air can easily easily flow backward. Therefore, in this case, it is possible to contribute to increasing the above-described effects. In this case, the wall surface of the side wall portion where the recess is not formed is located above the upper edge of the recess and is close to the size pan, so that the handle of the size pan is not directly exposed to the exhaust gas. The handle is only for heat transfer from the pan, and the temperature rise of the handle can be suppressed.

  In the gas stove, it is preferable that the shortest distance from the surface including the dent boundary line where the dent of the concave portion starts is set to 20 mm or less when the small pan is placed on Gotoku (Claim 6).

  In this case, air easily flows from the front through the concave portion of the side wall portion to the rear, so that the flow rate of the exhaust gas can be easily increased. For this reason, the above-described effects can be ensured.

  The shortest distance is preferably 15 mm or less, more preferably 10 mm or less, still more preferably 8 mm or less, and even more preferably 5 mm or less from the viewpoint of improving the flow of air into the recess and the outflow of air from the recess. be able to. In addition, the minimum of the said shortest distance will not be specifically limited if it can arrange | position so that a size pan may not contact between a pair of side wall parts, It can be set as the minimum clearance grade. Even with a minimum clearance level, it is possible to allow air to flow into the recess from the front. The lower limit of the shortest distance is, for example, preferably 0.3 mm or more, more preferably 0.5 mm or more, and further preferably 1 mm or more.

  In the gas stove, the side wall portion may be hollow.

  In this case, the side wall can be reduced in weight. In this case, it is also possible to obtain a heat insulating effect due to the air layer existing in the hollow of the side wall. Further, in this case, the concave portion can be easily formed by denting the wall surface on the side of the size pan in the side wall portion by plastic working or the like.

  In the gas stove, the virtues can be configured so that the exhaust gas from the combustion chamber does not flow out at least to the front surface when the small pan is placed.

  In this case, the flow of air flowing into the recess from the front is not hindered by the exhaust gas flowing out to the front, and air can flow more easily from the front to the rear through the recess in the side wall, so that the exhaust gas flow rate is further increased. It becomes easy. For this reason, the above-described effect can be further ensured. Moreover, in this case, the outflow of the exhaust gas to the front can be suppressed, and the heat felt by the user standing in front of the gas stove can be reduced. Moreover, it can also contribute to the temperature reduction by the side of the user of a top-plate part.

  In the above gas stove, around the rear of the virtues, when a small pot is placed on the virtues, it does not come into contact with the peripheral surface of the large pot and has a curved surface along the peripheral surface of the large pot. A rear heat collecting section may be provided (claim 9).

  In this case, the exhaust gas can be raised along the uniform gap formed between the circumferential surface of the trunk portion of the short drum pan and the curved surface of the rear heat collecting portion on the rear side of the thick pan. Therefore, in this case, coupled with the effect of increasing the exhaust gas flow rate due to the concave portion of the side wall portion, it becomes possible to more efficiently heat the circumferential surface of the body portion on the rear side of the size pan, and it is easy to further improve the thermal efficiency. Become.

  In the gas stove, it is preferable that the distance between the circumferential surface of the body portion of the short pan and the curved surface is set to 40 mm or less. This is because high thermal efficiency can be easily obtained and can contribute to the suppression of CO concentration. The distance between the circumferential surface of the trunk portion of the short pan and the curved surface is more preferably set to 35 mm or less, and even more preferably to 30 mm or less. In consideration of securing the exhaust gas flow path, clearance, etc., the distance between the circumferential surface of the barrel portion and the curved surface is preferably 0.1 mm or more, more preferably 0.5 mm or more, and even more preferably. Can be set to 1 mm or more.

Example 1
The gas stove of Example 1 will be described with reference to FIGS. As shown in FIGS. 1 to 8, the gas stove 1 of this example includes a stove body 2, a combustion gas burner 4 provided in the combustion chamber 3 in the stove body 2, and the periphery of the upper end opening 32 of the combustion chamber 3. And 5 virtues 5 Hereinafter, each component will be described in detail.

  The stove body 2 has a front plate portion 21, side plate portions 22 on both sides, a rear plate portion 23, and a top plate portion 24, and each plate portion 21, 22, 23, 24 is rectangular by welding or the like. It is configured to be joined in a box shape. In this example, the stove main body 2 shows an example that does not have a bottom plate portion. Each of the plate portions 21, 22, 23, 24 is formed of a metal material such as SUS (for example, SUS430). A substantially circular opening 241 is formed at a substantially central portion of the top plate portion 24, and the combustion chamber 3 is disposed in alignment with the opening 241. Legs 25 are projected from the lower ends of the front plate portion 21, the side plate portion 22, and the rear plate portion 23, and the front plate portion 21, the side plate portion 22, and the rear plate are disposed above the floor surface through a slight gap. The lower end of the part 23 is arranged. In this example, the stove body 2 is formed to have a width of 650 mm, a depth of 750 mm, a height of the leg portion 25 of 130 mm, and a height of 420 mm up to the surface of the top plate portion 24.

  On the lower surface of the stove main body 2, a pipe connection portion 26 to which a downstream end portion of a gas supply pipe (not shown) made of a metal pipe or the like is connected is provided. Combustion gas such as city gas is supplied to the pipe connection portion 26 through a gas supply pipe. A gas pipe 27 extends from the pipe connection portion 26 toward the inside of the stove body 2, and a gas nozzle 28 is provided at an end thereof. A gas cock 29 is interposed between the pipe connection portion 26 and the gas nozzle 28. When the gas cock 29 is opened, the combustion gas from the pipe connection portion 26 is supplied to the combustion gas burner 4. On the other hand, when the gas cock 29 is closed, the supply of the combustion gas from the pipe connecting portion 26 is shut off. The front plate portion 21 of the stove body 2 is provided with an operation portion 211 in which operation knobs and switches for opening and closing the gas cock 29 are arranged.

  In the combustion chamber 3, the interior surrounded by the side wall 31 is a combustion space. In this example, the side wall 31 is made of a metal material such as SUS (for example, SUS430) having a substantially cylindrical shape. The combustion chamber 3 has an upper end opened to form an upper end opening 32 and a lower end opened to form a lower end opening 33. In the combustion chamber 3, the combustion space in the combustion chamber 3 and the space in the stove main body 2 communicate with each other through the lower end opening 33. Thereby, secondary air flows when the combustion gas burner 4 burns into the combustion chamber 3 from the lower end opening 33. The intake of air into the stove main body 2 is performed from the bottom surface of the stove main body 2 or the gallery 212 formed on the front plate portion 21 of the stove main body 2 (see arrow A in FIG. 2).

  The combustion gas burner 4 is disposed in the combustion chamber 3, and has a burner body 41, a mixing tube 42, and a seed fire burner (not shown). The burner body 41 has a substantially circular shape, and a large number of flame holes are arranged in the circumferential direction on the upper surface thereof. The mixing tube 42 has a gas receiving port 421 into which the gas nozzle 28 is inserted at one end, and the other end is connected to the lower part of the burner body 41. The seed fire burner is for igniting a mixed gas ejected from a flame hole provided in the burner body 41. The seed fire burner is disposed in the vicinity of the burner main body 411 and is connected to the gas cock 29 via a gas pipe for seed fire (not shown).

  Gotoku 5 is a portion on which the short pan P is placed. The Gotoku 5 is not particularly limited as long as it has a configuration that allows the exhaust gas from the combustion chamber 3 to flow out mainly from the rear when the small pan P is placed. . In this example, the five virtues 5 having the configuration described below are used so that the exhaust gas from the combustion chamber 3 can surely flow out from behind.

  That is, the five virtues 5 are a substantially annular base 51 disposed around the upper end opening 32 of the combustion chamber 3, and a plurality of bases 51 arranged at intervals in the circumferential direction of the base 51 and extending inward in the radial direction of the base 51. Claw part 52 (in this example, specifically, seven claw parts 52). The base 51 includes a substantially annular plate-like portion 511 and a protruding portion 512 that protrudes downward from the inner peripheral portion of the plate-like portion 511. The outer diameter of the plate-like portion 511 is 500 mm, the inner diameter of the plate-like portion 511 is about 390 mm, the thickness of the plate-like portion 511 is 8 mm, and the protruding length of the protruding portion 512 is 34 mm. The projecting portion 512 is a portion for fitting into the upper end opening 32 of the combustion chamber 3 or the opening 241 of the top plate portion 24, and thereby the position shift of the virtues 5 along the top plate portion 24 of the stove body 2. Is prevented. Further, each of the plurality of claw portions 52 has a substantially rectangular parallelepiped outer shape, and the upper surface thereof is set as a mounting surface on which the bottom portion of the shell pan P is mounted. Each claw part 52 is arranged so that the longitudinal direction thereof is the radial direction of the base part 51, and from the middle of the longitudinal direction of each claw part 52 to the tip part, it is arranged inside the inner diameter of the base part 51. Yes. The size of each claw 51 is about 115 mm in the longitudinal direction, about 30 mm in the short direction, and 28 mm in height from the base.

  The plurality of claw parts 52 include a pair of front claw parts 521 arranged on the front side of the base part 51, at least one rear claw part 522 arranged on the rear side of the base part 51, and a pair of front claw parts. A pair of intermediate claw portions 523 disposed between 521 and the rear claw portion 522 is provided.

  In this example, specifically, the pair of front claws 521 are disposed at positions that are line-symmetric with respect to the center line Lm in the front-rear direction of the base 51 as the axis of symmetry. The angle formed between the axis 51 in the radial direction of the base 51 of the one front claw 521 and the axis L2 in the radial direction of the base 51 of the other front claw 521 is set to about 63 °.

  Further, the rear claw portion 522 is disposed in a region on the rear side of the boundary line M that separates the front half and the rear half of the base portion 51. In this example, the rear claw part 522 has three parts, a rear center claw part 522m arranged on the center line Lm in the front-rear direction of the base 51, a rear right claw part 522r and a rear left claw part 522l arranged on the left and right sides thereof. It is comprised from the nail | claw part. The angle formed between the axis 51 in the radial direction of the base 51 of the rear center claw 522m (in this example, the center line Lm) and the axis L3 in the radial direction of the base 51 of the rear right claw 522r is set to about 50 °. Yes. The angle formed between the axis 51 in the radial direction of the base 51 of the rear center claw 522m (in this example, the center line Lm) and the axis L4 in the radial direction of the base 51 of the rear left claw 522l is set to about 50 °. Yes. That is, the rear right claw portion 522r and the rear left claw portion 522l are arranged at positions that are line-symmetric with respect to the center line Lm in the front-rear direction of the base portion 51 as a symmetry axis. The number of each claw part which comprises the back claw part 522 is not specifically limited, It can change suitably.

  The pair of intermediate claws 523 are arranged at positions that are line-symmetric with respect to the center line Lm in the front-rear direction of the base 51 as the axis of symmetry. Further, the pair of intermediate claw portions 523 are arranged in a region on the front side of the boundary line M that separates the front half and the rear half of the base portion 51. The angle formed between the axis 51 in the radial direction of the base 51 of the one intermediate claw 523 and the axis L1 in the radial direction of the base 51 of the one front claw 521 is set to about 50 °. The angle formed between the axis L6 in the radial direction of the base 51 of the other intermediate claw 523 and the axis L2 in the radial direction of the base 51 of the other front claw 521 is set to about 50 °. Note that the pair of intermediate claw portions 523 can be disposed in a position overlapping the boundary line M or in a region on the rear side of the boundary line M.

  The virtues 5 are provided with a front connection wall portion 53 that extends in the circumferential direction of the base portion 51 and is connected to the base portion 51 and the pair of front claw portions 521 between the pair of front claw portions 521.

  In this example, specifically, the front connection wall portion 53 is configured by a plate-like body (thickness 8 mm) formed in a substantially arc shape along the circumferential direction of the base portion 51, and the base portion 51 is formed at the lower end edge thereof. In addition to being connected, the both side edges are connected to a pair of front claws 521. The upper surface of the front connecting wall portion 53 and the upper surfaces of the pair of front claw portions 521 are aligned with each other so as to be substantially on the same plane. Further, as described above, since the angle between the pair of front claw portions 521 is about 63 °, the front connection wall portion 53 is provided in the circumferential direction of the base portion 51 substantially over the above angle range. In addition, the base 51 of the part which provides the front connection wall part 53 has the extension part 513 extended in the base 51 radial inside. The front connection wall 53 is aligned radially inward with the inner periphery of the first connection wall 541 of the side connection wall 54, which will be described later, in the radial direction inward of the base 51 of the extension 513. Standing on the edge of the.

  The five virtues 5 include a first connecting wall portion 541 extending between the front claw portion 521 and the intermediate claw portion 523 in the circumferential direction of the base 51 and inward in the radial direction of the base 51, and a base portion from the outer periphery of the first connecting wall portion 541. A second connection wall portion 542 extending substantially perpendicularly to the 51 side and a pair of side connection wall portions 54 connected to the front claw portion 521 and the intermediate claw portion 523 are provided. In this example, the side connecting wall portion 54 has a substantially “L” -shaped cross section cut along the radial direction of the base portion 51.

  In this example, specifically, the 1st connection wall part 541 is comprised from the plate-shaped body (thickness 6mm and the length of 24 mm of base 51 radial direction) extended in the base 51 circumferential direction and the base 51 radial direction inward. The both side edges are connected to the front claw portion 521 and the intermediate claw portion 523. Further, the height of the upper surface of the first connecting wall portion 541 and the upper surfaces of the front claw portion 521 and the intermediate claw portion 523 are aligned so as to be substantially on the same plane. Therefore, the first connecting wall portion 541 can be brought into surface contact with the bottom portion of the full-size pan P. The first connecting wall portion 541 is arranged such that the outer peripheral portion thereof is aligned with the inner peripheral portion of the base portion 51 substantially in the vertical direction.

  On the other hand, the second connecting wall portion 542 is configured by a plate-like body (thickness 6 mm) formed in a substantially arc shape along the circumferential direction of the base 51, and the front claw portion 521 and the intermediate claw portion 523 are formed on both side edges. It is connected to. The length of the second connecting wall portion 542 in the vertical direction is set to 2/3 of the distance of 28 mm between the upper end edge of the second connecting wall portion 542 and the base portion 51.

  In Gotoku 5, an opening 55 is formed between the second connecting wall 542 and the base 51. In this example, specifically, the opening 55 is formed between the lower end edge of the second connection wall portion 542 and the edge portion on the radially inner side of the base portion 51. The vertical length of the opening 55 in this example is about 10 mm. The opening 55 is for directly viewing the flame (open flame) of the combustion gas burner 4. The high-temperature exhaust gas generated by the combustion of the combustion gas burner 4 flows radially outward toward the upper side in the side connection wall portion 54, but the high-temperature exhaust gas exists in the presence of the second connection wall portion 542. Is returned to the inside of the combustion chamber 3 again. Therefore, a large amount of exhaust gas does not flow out from the opening 55 to the outside. That is, even when the Gotoku 5 having such a configuration is used, when the small pan P is placed, the exhaust gas from the combustion chamber 3 can flow out mainly from the rear. In addition, the virtues 5 are configured so that the exhaust gas from the combustion chamber 3 does not flow out to the front when the small pan P is placed by having the front connecting wall portion 53.

  The gas stove 1 has a substantially cylindrical air flow path cylinder portion 7 communicating with the inside of the stove body 2 at the rear end portion of the stove body 2. The air channel cylinder 7 is formed in a cylindrical shape from a metal material such as SUS (for example, SUS430). A rectifying plate 71 is attached to the upper end portion of the air flow path cylinder portion 7 so that the air flowing through the air flow path cylinder portion 7 is discharged obliquely upward.

  The gas stove 1 has a pair of side wall portions 8 that protrude upward from both side edges of the top plate portion 24 of the stove main body 2 and that are spaced apart from each other so as not to contact the circumferential surface of the body portion of the short pan P. doing. As for a pair of side wall part 8, the front-end part is arrange | positioned between the boundary line M which divides the front half and rear half of Gotoku 5, and the front edge part of the stove main body 2 together. In addition, the pair of side wall portions 8 both have a concave portion 81 that dents inwardly on the wall surface on the side of the narrow pan P.

  In this example, specifically, the side wall portion 8 obliquely connects the front wall portion 811, the side wall portions 812 on both sides, the upper surface wall portion 813, and the front wall portion 811 and the upper surface wall portion 813. It has an inclined wall portion 814, and is configured in a hollow substantially box shape. Each of the wall portions 811, 812, 813, and 814 is made of a metal material such as SUS (for example, SUS430). In the present example, the side wall portion 8 shows an example in which there are no wall portions on the lower surface and the rear surface. The lower surface of the side wall portion 8 is in contact with the upper surface of the top plate portion 24, and the rear surface of the side wall portion 8 is in contact with the front surface of the air flow path cylinder portion 7. Further, the front wall portion 811 which is the front end portion of the side wall portion 8 is located at a position of 200 mm forward from the boundary line M, and the distance between the front wall portion 811 and the front edge portion of the top plate portion 24 is 160 mm. It is.

  The recessed part 81 is formed in the side wall part 812 which comprises the wall surface by the side of the pancake pan P. As shown in FIG. In this example, the recess 81 has a pair of inclined surfaces 815 that are inclined toward the deepest part of the recess of the recess 81. The deepest portion of the recess of the recess 81 is disposed at a position that coincides with the boundary line M. The upper end edge of the recessed portion 81 is disposed below the upper end edge of the side wall portion 8, and the lower end edge of the recessed portion 81 is disposed in contact with the upper surface of the top plate portion 24. In the recess 81, the cross-sectional shape of the recess 81 when cut along a plane substantially parallel to the top plate portion 24 is a line-symmetric shape with the boundary line M as the symmetry axis. In addition, in this example, although the recessed part 81 was formed as mentioned above, the recessed part 81 has the curved surface (not shown) which curves to the wall inner side of the wall surface by the side of the pancake P in the side wall part 8 in addition to this. It can also be configured.

  The gas stove 1 of this example has a shortest distance between the peripheral surface of the trunk portion of the cylindrical pan P and the surface 817 including the concave boundary line 816 where the recess of the concave portion 81 starts when the large pan P is placed on the virtues 5. It is designed to be 5 mm or less. Specifically, the gas stove 1 of this example uses a 51 cm diameter pan pan P as a standard. Therefore, it is designed so that the shortest distance is 5 mm or less when this small pan P is placed on Gotoku 5.

  The gas stove 1 of this example does not come into contact with the circumferential surface of the body pan P when the body pan P is placed on the back of the Gotoku 5, and the body periphery of the body pan P. A rear heat collecting section 9 having a curved surface 91 along the surface is provided.

  The rear heat collecting section 9 has a curved surface 91 to keep the gap 62 between the cylindrical body P and the circumferential surface of the cylindrical section P constant, and promotes heating of the rear side of the cylindrical pot P by heat transfer from the exhaust gas. There is a role. Specifically, the rear heat collecting unit 9 includes a curved plate portion 911 formed with a curved surface 91, an upper plate portion 912, and a side plate portion 913, and the rear end portions of the pair of side wall portions 8. Arranged between. In this example, the gap 62 between the circumferential surface of the body portion of the short pan P and the curved surface 91 of the curved plate portion 911 is designed to be 30 mm or less. Note that both side surfaces of the rear heat collecting portion 9 are in contact with the side wall portion 812 inside the side wall portion 8, and the rear surface of the rear heat collecting portion 9 is in contact with the front surface of the air flow path cylinder portion 7. .

  Next, the heating of the full-size pan P using the gas stove 1 of this example will be described. For example, a small pan P containing ingredients such as soup is placed on the five virtue 5 of the gas stove 1. In the state where the size pan P is placed on the virtues 5, the upper surfaces of the front claw portion 521 and the intermediate claw portion 523, the upper end surface of the front connection wall portion 53, and the first connection wall portion 541 in the side connection wall portion 54. While the upper surface is in close contact with the bottom portion of the size pan P, a gap 61 is formed between the intermediate claw portion 523 and the rear claw portion 522 and between the rear claw portions 522. That is, the combustion chamber 3 in the stove body 2 communicates with the outside through the gap 61. Moreover, in this example, the shortest distance of the trunk | drum peripheral surface of the pancake pan P and the surface 817 containing the dent boundary line 816 where the dent of the recessed part 81 begins is 5 mm or less, the trunk | drum peripheral surface of the pancake pan P, and a rear heat collecting part. The narrow pan P is placed on the five virtues 5 so that the distance between the nine curved surfaces 91 is 30 mm or less.

  Thus, after placing the full-size pan P on the virtues 5, the combustion gas burner 4 is burned to heat the full-size pan P. In order to burn the combustion gas burner 4, the gas cock 29 may be opened by turning the operation knob in the ignition direction. When the gas cock 29 is opened, combustion gas is supplied to the burner body 41 through the gas pipe 27 and the mixing pipe 42, ignited by the seed flame burner, and combustion is started in the combustion gas burner 4. In this example, it is possible to visually adjust the flame state of the combustion gas burner 4 directly from the opening 55 of the five virtues 5 and adjust the heating power.

  When combustion of the combustion gas burner 4 is started, a flame is formed in the combustion chamber 3 and high-temperature exhaust gas is generated by combustion. The bottom of the short pan P is heated by the flame and the exhaust gas. The exhaust gas is heated by the draft of the exhaust draft, the temperature difference, the draft generated by the gas jet from the combustion gas burner 4 and the like. It flows upward from the gap 61 formed by the portion 52 (see arrow B in FIG. 2). At this time, the gas stove 1 has a front connection wall portion 53 between the pair of front claw portions 521 of Gotoku 5, and further, a side connection wall between the front claw portion 521 and the intermediate claw portion 523. Since it has the part 54, the outflow of the exhaust gas to the front is reliably suppressed. As described above, the high-temperature exhaust gas mainly flowing out from the rear of Gotoku 5 rises along the gap 62 formed between the circumferential surface of the trunk portion of the short pan P and the curved surface 91 of the rear heat collecting portion 9. The body peripheral surface portion on the rear side of the short pan P is heated by heat transfer. Thereafter, the air is collected in an exhaust hood (not shown) disposed above the gas stove 1 and exhausted to the outside of the unit.

  Note that part of the air that has flowed into the stove body 2 from the lower surface of the stove body 2 or the gallery 212 of the front plate portion 21 due to the draft or the like flows into the combustion chamber 3 and is burned by the combustion gas burner 4. (See arrow A in FIG. 2). In addition, after the stove body 2 is cooled, the remaining much of the air that has flowed in flows into the air flow path cylinder portion 7 whose lower end portion is connected above the rear end portion of the stove body 2 and flows inside the cylinder. It rises and is discharged from the upper end of the air flow path cylinder 7 (see arrow C in FIG. 2). The discharged air is collected in an exhaust hood (not shown) together with the exhaust gas and exhausted to the outside of the unit.

  Here, the gas stove 1 has a pair of side wall parts 8 provided with the said structure. Therefore, the gas stove 1 can increase the flow velocity of the exhaust gas that flows out from the combustion chamber 3 and rises from the combustion chamber 3 by the air flowing from the front through the recess 81 of the side wall 8 through the recess 81 of the side wall portion 8 due to the draft effect of the exhaust gas. . And when the flow rate of exhaust gas goes up, the gas stove 1 can heat the trunk | drum peripheral surface of the back side of the full-size pan P efficiently, and can improve thermal efficiency. If the heat efficiency of the gas stove 1 is improved, the boiling time of hot water can be shortened and the amount of combustion gas consumed when maintaining the temperature can be reduced, so that the energy-saving gas stove 1 is obtained.

  According to the gas stove 1 described above, it is possible to increase the flow rate of exhaust gas that heats the circumferential surface of the body portion on the rear side of the full-size pan P and to improve the thermal efficiency.

  In addition, the gas stove 1 is, in particular, disposed at a position where the deepest part of the dent of the concave portion 81 overlaps the boundary line M, and further, a cross-sectional shape of the concave portion 81 when cut by a plane substantially parallel to the top plate portion 24. Is a line-symmetric shape with the boundary line M as the axis of symmetry. Therefore, the gas stove 1 is excellent in balance between the flow of air from the front into the recess 81 and the outflow of air that has flowed into the recess 81. Further, in the gas stove 1, since the recess 81 has a pair of inclined surfaces 815 that are inclined toward the deepest portion of the recess of the recess 81, the formation of the recess 81 is relatively easy. Moreover, since the upper end edge of the recessed part 81 is arrange | positioned below the upper end edge of the side wall part 8, the wall surface of the side wall part 8 in which the recessed part 81 is not formed is above the upper end edge of the recessed part 81. positioned. Therefore, the gas stove 1 can suppress the air flowing into the concave portion 81 from flowing out upward from the upper end portion of the concave portion 81, and the air can easily flow efficiently backward, contributing to increasing the above-described effects. can do. Moreover, since the gas stove 1 has the back heat collecting part 9, it exhausts along the uniform clearance gap 62 formed between the trunk | drum peripheral surface part of the inked pan P and the curved surface 91 of the back heat collecting part 9. The gas can be raised. For this reason, the gas stove 1 can efficiently heat the peripheral surface of the body portion on the rear side of the short pan P in combination with the effect of increasing the flow velocity of the exhaust gas by the concave portion 81 of the side wall portion 8, further improving the thermal efficiency. Easy to make.

  Further, the gas stove 1 has an air flow path cylinder portion 7 at the rear end portion of the stove body 2. Therefore, the gas stove 1 can enhance the heat insulating property on the rear end side of the stove main body 2 due to the heat insulating effect by the air flowing into the air flow path cylindrical portion 7 from the stove main body 2. Therefore, the gas stove 1 is easy to arrange near the wall of the room where the gas stove 1 is installed or in contact with the wall of the room, and it is easy to effectively use the space of the room.

  Next, in the gas stove of the first embodiment, the case where a small-sized pan p (outer diameter of 39 cm) having a smaller outer diameter than the standard large-sized pan P is placed on the five virtue 5 as the small-sized pan P is shown in FIGS. It explains using.

  In this case, the gap between the circumferential surface of the trunk portion of the short pan p and the curved surface 91 of the rear heat collecting portion 9 is relatively large as compared with the case where the standard pan pan P is applied. Therefore, in such a case, as shown in FIGS. 9 to 11, the rear heat collecting portion 9 is detachably attached to the gap adjusting material 914 protruding from the curved surface 91 and the gap adjusting material 914, It is good to have further the curved board | plate material 915 which has the curved surface 910 curved along the trunk | drum peripheral surface of the size pan p. The gap adjusting member 914 and the curved plate member 915 are both made of a metal material such as SUS (for example, SUS430). The gap adjusting member 914 can also be detachably attached to the curved surface 91.

  In this case, even if the size pan p having a smaller outer diameter than the standard size pan P is placed on the Gotoku 5, the space between the body peripheral surface of the size pan p and the curved surface 910 of the curved plate 915. The gap 63 can be adjusted to a range advantageous for improving the flow rate of the exhaust gas. Further, since the curved plate material 915 can be removed, it is possible to easily cope with both the standard pancake pan P and the pancake pan p whose outer diameter is smaller than that of the standard pancake pan P. In addition, the exhaust gas from the combustion chamber 3 includes a gap 63 between the circumferential surface of the body portion of the short pan p and the curved surface of the curved plate member 915, and a curved plate portion in the rear surface of the curved plate member 915 and the rear heat collecting unit 9. It can comprise so that it may exhaust from the exhaust hood through the clearance gap 64 between 911.

Next, the distance between the curved surfaces 91 and 910 of the curved plate portion 911 or the curved plate material 915 of the rear heat collecting portion 9 and the circumferential surface of the barrel portion P, p is changed, and the combustion gas burner is burned under the same conditions. The CO concentration (ppm, O ₂ = 0% converted value) and thermal efficiency were measured. The measurement point of the CO concentration is the S point shown in FIGS. The results are shown in Table 1.

  As shown in Table 1, it can be seen that the thermal efficiency is as high as 40% or more when the distance between the circumferential surface of the body portion of the short pan P, p and the curved surfaces 91, 910 is 40 mm or less. However, when the distance between the circumferential surface of the body portion of the size pan P, p and the curved surfaces 91, 910 exceeds 40 mm, the CO concentration tends to increase. Therefore, it can be said that it is preferable to set the distance between the trunk | drum peripheral surface of the size pan P and p, and the said curved surfaces 91 and 910 to 40 mm or less from a viewpoint of suppression of CO density | concentration which obtains high thermal efficiency. It turns out that the distance between the trunk | drum peripheral surface of the size pan P and p, and the said curved surfaces 91 and 910 is set to 35 mm or less more preferably 30 mm or less more preferably.

  As mentioned above, although the Example was described, this invention is not limited by the said Example, A various deformation | transformation can be performed within the range which does not impair the meaning of this invention.

DESCRIPTION OF SYMBOLS 1 Gas stove 2 Stove main body 24 Top plate part 3 Combustion chamber 32 Upper end opening part 4 Combustion gas burner 5 Gotoku 8 Side wall part 81 Recessed part P, p Inch pan M Boundary line

Claims (10)

A stove body, a combustion gas burner provided in a combustion chamber within the stove body, and an exhaust gas from the combustion chamber when a pan is placed around the upper end opening of the combustion chamber A gas stove having five virtues that mainly flow out from behind,
It protrudes upward from both side edges of the top plate portion of the stove body, and has a pair of side wall portions arranged apart from each other so as not to come into contact with the circumferential surface of the trunk portion of the pan.
The pair of side wall portions are arranged between a boundary line separating the front half and the rear half of the five virtues and a front edge portion of the stove body, and a wall is formed on the wall on the side of the pan. A gas stove having a recess recessed inwardly. The gas stove according to claim 1, wherein
A gas stove, wherein the deepest part of the recess of the recess is disposed at a position overlapping the boundary line. The gas stove according to claim 2, wherein
A gas stove characterized in that a cross-sectional shape of the recess when cut along a plane substantially parallel to the top plate is a line-symmetric shape with the boundary line as a symmetry axis. The gas stove according to any one of claims 1 to 3,
The gas stove, wherein the recess has a pair of inclined surfaces that are inclined toward the deepest part of the recess of the recess. In the gas stove according to any one of claims 1 to 4,
The gas stove characterized in that the upper end edge of the concave portion is disposed below the upper end edge of the side wall portion. In the gas stove according to any one of claims 1 to 5,
When the above-mentioned pancake is placed on the above five virtues, the shortest distance between the trunk peripheral surface of the pancake pan and the surface including the dent boundary line where the recess of the recess starts is set to 20 mm or less. Characteristic gas stove. In the gas stove according to any one of claims 1 to 6,
The gas stove characterized in that the side wall is hollow. In the gas stove according to any one of claims 1 to 7,
The gas stove is configured such that the exhaust gas from the combustion chamber does not flow out at least to the front when the small pot is placed. In the gas stove according to any one of claims 1 to 8,
Around the rear of the virtues, when the sash pan is placed on the swords, a curved surface that does not come into contact with the body periphery of the sash pan and is along the periphery of the shell A gas stove provided with a rear heat collecting part. The gas stove according to claim 9, wherein
A gas stove characterized in that, when the above-mentioned pan is placed on the above five virtues, the distance between the body peripheral surface of the pan and the curved surface is set to 40 mm or less.

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