JP3710103B2 - Cooking furnace - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cooking furnace having a support member that supports an object to be heated and surrounds the burner flame so that the flame of the burner is not exposed to the outside.
[0002]
[Prior art]
Conventionally, as a cooking furnace, one that supports an object to be heated such as a pan by means of five virtues formed with a plurality of claw-like projections has been used. In this furnace, the flame of the burner and the hot air of the flame are exposed to the outside of the five virtues through the gap between the bottom of the object to be heated and the top plate of the furnace, so that the handle of the object to be heated is heated and heated. There was a problem that the handle of the heated object was difficult to hold.
[0003]
Therefore, for example, a flame exposure prevention type cooking furnace as shown in FIG. 7 has been proposed. This furnace is provided in the furnace main body 110, the burner 140 that is provided in the furnace main body 110 and heats the article to be heated M, and a support member that is placed on the furnace main body 110 and supports the object to be heated M (so-called five virtues). 120). The support member 120 is formed in an annular shape so as to surround the flame of the burner 140, and the upper surface of the support member 120 abuts against the bottom surface of the object to be heated M over the entire circumference so that the flame and hot air of the burner 140 are not exposed to the outside of the support member 120. It is like that. Under the support member 120, an inner top plate 115 that protects the burner 140 from spilling from the article to be heated M is provided. The furnace is further provided in the furnace body 110, and an exhaust passage 134 for exhausting the exhaust gas generated by the combustion of the burner 140 from the space inside the support member 140 to the outside, and the exhaust gas through the exhaust passage 134, the support member 120. The exhaust fan 135 is forcibly exhausted to the outside from the inner space. A plurality of circular exhaust holes 124 are formed on the inner peripheral side surface of the support member 120, and an exhaust passage 122 is formed inside the support member 120. The inner top plate 115 is also formed with a plurality of circular exhaust holes 115b. Exhaust gas generated by the combustion of the burner 140 passes through the exhaust hole 124 of the support member 120, the exhaust passage 122 inside the support member 120, the exhaust hole 115 b of the inner top plate 115, and the exhaust passage 134 from the space inside the support member 120. After that, it is discharged to the outside.
[0004]
[Problems to be solved by the invention]
However, in the cooking furnace shown in FIG. 7, the positional relationship between the exhaust hole 124 of the support member 120 and the exhaust hole 115b of the inner top plate 115 is not particularly defined, and the arrangement of the support member 120 and the inner top plate 115 is not determined. Depending on the manner, the distance between the exhaust hole 124 of the support member 120 and the exhaust hole 115b of the inner top plate 115 varies, so that the time during which the exhaust gas stays below the bottom surface of the object to be heated M varies. When the distance between the exhaust hole 124 of the support member 120 and the exhaust hole 115b of the inner top plate 115 becomes short, the exhaust gas stays below the bottom surface of the object M to be heated. There is a problem that time is shortened and thermal efficiency is lowered.
[0005]
The present invention has been made in view of such problems, and its purpose is to provide a cooking furnace having a support member that supports the object to be heated and surrounds the flame of the burner so that the flame of the burner is not exposed to the outside. An object of the present invention is to provide a cooking furnace capable of improving and stabilizing thermal efficiency.
[0006]
[Means for Solving the Problems]
The cooking furnace according to claim 1 has a burner for heating an object to be heated, and a support that surrounds the flame of the burner so as to support the object to be heated and not to expose the flame of the burner to the outside. The member and a space formed in the support member and surrounded by the support member communicate with a hollow space inside the support member, and exhaust gas generated by burning of the burner is communicated from the space surrounded by the support member to the hollow space inside the support member. A support member side exhaust hole that leads to the exhaust gas, an exhaust passage for exhausting exhaust gas due to combustion of the burner to the outside, a plate-like member that is provided on the lower side of the support member and protects the burner from spilling from the heated object The plate-like member is provided with a plate-like member-side exhaust hole that communicates the hollow space inside the support member and the exhaust passage, and the support-member-side exhaust hole and the plate-like member-side exhaust hole are at alternate positions. Including arranged holes It is intended.
[0007]
In this cooking furnace, the exhaust gas from the combustion of the burner is guided from the space surrounded by the support member to the hollow space inside the support member through the support member side exhaust hole, and further through the plate-like member side exhaust hole. And is discharged to the outside through this exhaust passage. Here, since the support member side exhaust holes and the plate-like member side exhaust holes include holes arranged at alternate positions, the exhaust gas is heated by the load when the exhaust gas passes between these exhaust holes. Since the residence time on the lower side of the bottom of the plate is longer, the thermal efficiency is improved, and the positional relationship between the support member side exhaust holes and the plate member side exhaust holes is defined, The dispersion of the residence time on the lower side is eliminated, and the thermal efficiency is stabilized.
[0008]
The cooking furnace according to claim 2 is the cooking furnace according to claim 1, wherein the support member and the plate-like member are arranged so that the positional relationship between the support-member-side exhaust hole and the plate-like member-side exhaust hole is constant. Is provided with positioning means for positioning.
[0009]
The cooking furnace according to claim 3 is the cooking furnace according to claim 1 or 2, wherein the support member side exhaust holes and the plate-like member side exhaust holes arranged at alternate positions are respectively extended in the circumferential direction. It is a hole having a shape.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0011]
FIG. 1 is a cross-sectional view showing a configuration of a cooking furnace according to an embodiment of the present invention. This cooking furnace is provided in the furnace body 10, the burner 40 for heating the object to be heated M such as a pan, and placed on the furnace body 10 to support the object to be heated M. And a support member (so-called five virtues) 20.
[0012]
The furnace body 10 has a housing 11 that accommodates a burner 40 and the like therein. On the front surface of the housing 11, a fire extinguishing button 12 for instructing ignition and extinguishing of the burner 40 is provided. On the back side of the point-extinguishing button 12, a point-extinguishing switch 13 is arranged so that the point-extinguishing switch 13 comes into contact when the point-extinguishing button 12 is pressed. The point fire switch 13 is connected to a control device 50 provided in the housing 11. The control device 50 is constituted by a microcomputer, for example.
[0013]
The top surface of the housing 11 is open, and a top plate 14 is disposed so as to cover the open top surface. An opening 14 a is formed at the center of the top plate 14. On the top plate 14, an inner top plate 15 as a plate member is placed so as to cover the opening 14 a, and the burner 40 is protected from spillage from the heated object M. The peripheral edge of the inner top plate 15 is supported by the upper surface of the peripheral edge of the opening 14a. An opening 15 a is formed at the center of the inner top plate 15, and the flame of the burner 40 comes into contact with the object to be heated M placed on the support member 20 through the opening 15 a.
[0014]
FIG. 2 is a perspective view showing the support member 20. As shown in this figure, the support member 20 is formed in an annular shape so as to surround the flame of the burner 40, and the upper surface of the support member 20 abuts against the bottom surface of the object to be heated M over the entire circumference, so It is not exposed to the outside of the support member 20. The support member 20 has a hollow space 22 inside, and the bottom is open. The support member 20 is formed by press molding, for example, and is made of, for example, stainless steel coated with enamel. The lower end portion on the outer peripheral side of the support member 20 is supported by the upper surface of the peripheral portion of the opening 14 a of the top plate 14. On the inner peripheral side of the support member 20, a step portion 23 is formed so as to protrude toward the center portion of the support member 20, and the flame of the burner 40 is widely spread to the bottom of the object to be heated M by this step portion 23. It can be made to approach. The lower end portion on the inner peripheral side of the support member 20 is supported by the upper surface of the inner top plate 15.
[0015]
A plurality of exhaust holes 24 are formed in the side surface on the inner peripheral side of the support member 20 located above the step portion 23 along the circumferential direction, and the exhaust gas generated by combustion of the burner 40 is supported through the exhaust holes 24. It can guide to the hollow space 22 inside the member 20. The exhaust holes 24 include oblong exhaust holes 24a and circular exhaust holes 24b extending in the circumferential direction, and these are alternately arranged at regular intervals. As described above, by providing the elliptical exhaust hole 24a in addition to the circular exhaust hole 24b, the entire area of the exhaust hole 24 can be enlarged, and the exhaust gas can be efficiently guided to the hollow space 22. .
[0016]
A combustion housing 30 is disposed below the inner top plate 15. The combustion housing 30 is configured as an inner / outer double wall structure with an open top, and the upper end of the outer wall 31 is in contact with the lower surface of the peripheral edge of the opening 14 a of the top plate 14. The upper end portion of the inner wall 32 of the combustion housing 30 is in contact with the lower surface of the peripheral portion of the opening 15a of the inner top plate 15, and supports the peripheral portion of the opening 15a from the lower surface. A projecting portion 33 projecting toward the center is formed on the upper portion of the inner wall 32, and a burner 40 is disposed in a space below the projecting portion 33.
[0017]
The space between the outer wall 31 and the inner wall 32 of the combustion housing 30 communicates with the hollow space 22 of the support member 20 through the exhaust hole 15b formed at the outer peripheral side position of the inner top plate 15, and the exhaust gas An exhaust passage 34 for discharging the gas is configured. The exhaust passage 34 communicates with an exhaust port 14 b formed at the back of the top plate 14. An exhaust fan 35 is disposed in the exhaust passage 34 in the vicinity of the exhaust port 14b, and exhaust gas is exhausted through the exhaust hole 24 of the support member 20, the hollow space 22, and the exhaust hole 15b of the inner top plate 15. The air is sucked into the exhaust passage 34 from the space inside the support member 20, and can be forcibly exhausted to the outside through the exhaust port 14b. The exhaust fan 35 has a fan motor (not shown) as a drive source. As the fan motor, either a DC motor or an AC motor may be used. The fan motor is connected to the control device 50, and is driven, for example, by supplying a constant voltage of electric power based on an instruction from the control device 50.
[0018]
3 is a cross-sectional view taken along the line II in FIG. As shown in this figure, a plurality of exhaust holes 15b in the inner top plate 15 are provided along the outer periphery, and are each extended in the circumferential direction, and are alternately different from the elliptical exhaust holes 24a in the support member 20. It is arranged at the position. This makes the distance between the oblong exhaust hole 24a of the support member 20 and the exhaust hole 15b of the inner top plate 15 long and constant, and allows the exhaust gas and heated air to flow under the bottom surface of the object to be heated M. This is for the purpose of maintaining the residence for a long time and eliminating the dispersion of the residence time, improving the thermal efficiency and stabilizing. A concave portion 25 as a positioning means is formed at the lower end portion on the outer peripheral side of the support member 20.
[0019]
4 is an enlarged perspective view showing the vicinity of the recess 25 in FIG. As shown in this figure, a convex portion 14 c that fits into the concave portion 25 of the support member 20 is formed as a positioning means on a part of the peripheral edge portion of the opening 14 a of the top plate 14. Further, a concave portion 15c that fits into the convex portion 14c is formed at the lower end portion on the outer peripheral side of the inner top plate 15 as positioning means. Then, when the inner top plate 15 and the support member 20 are placed on the top plate 14, the oval exhaust holes of the support member 20 are fitted by fitting the concave portions 15c, 25 and the convex portion 14c. 24a and the exhaust hole 15b of the inner top plate 15 are positioned at alternate positions as shown in FIG.
[0020]
The burner 40 is constituted by a ring burner, and a flame hole 41 that opens inward is provided around the inner periphery. In the vicinity of the flame hole 41, a spark plug 42 and a misfire sensor 43 are disposed. The spark plug 42 is connected to the control device 50 and ignites based on an instruction from the control device 50. The misfire sensor 43 is constituted by a thermocouple, and it is detected whether the burner 40 is ignited or misfired by the thermoelectromotive force of the thermocouple. Based on the output of the misfire sensor 43, when the burner 40 is ignited, an electromagnetic safety valve (not shown) is held open, and when the burner 40 misfires, the electromagnetic safety valve is closed.
[0021]
The outer peripheral portion of the burner 40 is fitted into the opening at the upper end of the bottomed cylindrical support frame 44. The support frame 44 is disposed inside the combustion housing 30, and a gap is formed between the outer peripheral surface of the support frame 44 and the inner wall 32 of the combustion housing 30. A gap communicating with the gap between the support frame 44 and the combustion casing 30 is also formed between the burner 40 and the overhang portion 33 of the combustion casing 30. These gaps constitute a secondary air passage 45 that guides the secondary air necessary for combustion of the burner 40. A plurality of openings 44 a are formed in the bottom plate of the support frame 44, and secondary air necessary for combustion of the burner 40 can be guided from here as well.
[0022]
One end of a gas mixing tube 46 for supplying gas to the burner 40 is connected to a part of the bottom of the burner 40. The other end of the gas mixing tube 46 is connected to a gas supply source (not shown) via a proportional valve 47. The proportional valve 47 is driven by a proportional valve driving device (not shown). The proportional valve driving device is connected to the control device 50 and adjusts the opening amount (that is, the gas supply amount) of the proportional valve 47 under the control of the control device 50.
[0023]
A rod 61 is arranged in the vertical direction at the center portion in the furnace body 10, and a thermal head 60 for detecting the temperature of the bottom surface of the object to be heated M is attached to the upper end portion of the rod 61. The lower end portion of the rod 61 is supported by a bracket 44b extending below the support frame 44 so as to be movable up and down. A flange 62 is formed near the lower end of the rod 61, and a spring 63 is interposed between the bracket 44 b and the flange 62. By this spring 63, the rod 61 and the thermal head 60 are biased upward (that is, the object to be heated M), so that when the object to be heated M is placed on the support member 20, the thermal head 60 is moved. The upper end portion comes into contact with the bottom portion of the object to be heated M without fail. The thermal head 60 is connected to the control device 50, and the control device 50 adjusts the proportional valve 47 and adjusts the combustion amount of the burner 40 according to the output signal of the thermal head 60, and the object to be heated by emptying or the like. The overheating of M can be prevented.
[0024]
Around the rod 61 and the thermal head 60, a protective cylinder 64 having both ends opened is disposed. A gap is formed between the protective cylinder 64, the rod 61 and the thermal head 60. The upper end portion of the protective cylinder 64 is set to be lower than the upper surface 21 of the support member 20, and the upper end portion of the protective cylinder 64 is placed on the heated object M even when the heated object M is placed on the support member 20. It is designed to prevent damage from touching the bottom surface. The lower end of the protective cylinder 64 is inserted through the bottom plate of the support frame 44, and the air sucked from the opening at the lower end of the protective cylinder 64 passes through the protective cylinder 64, and the upper end of the protective cylinder 64 and the object to be heated M. It is blown out radially toward the support member 20 from between the bottom surface. As a result, the thermal head 60 is cooled and the flame of the burner 40 is prevented from coming into direct contact with the thermal head 60, and the thermal head 60 accurately measures the temperature of the bottom surface of the object to be heated M without being affected by the flame. I can do it. A plurality of openings 64 a are formed in the lower part of the protective cylinder 64, and a part of the air sucked from the opening at the lower end is discharged out of the protective cylinder 64 from the opening 64 a. This air becomes secondary air for combustion of the burner 40 and rises along the outer peripheral surface of the protective cylinder 64 to protect the protective cylinder 64 from flame.
[0025]
Next, the operation of the cooking furnace according to the present embodiment will be described.
[0026]
First, prior to use, the inner top plate 15 and the support member 20 are placed on the top plate 14. At this time, by fitting the concave portion 15c of the inner top plate 15 and the concave portion 25 of the support member 20 with the convex portion 14c of the top plate 14, the oblong exhaust holes 24a of the support member 20 and the inner top plate 15 are The exhaust holes 15b are positioned at alternate positions as shown in FIG.
[0027]
In use, the cook presses the fire extinguishing button 12 to instruct ignition. As a result, the fire extinguishing switch 13 is turned on, and an ignition signal is output to the control device 50. In response to the ignition signal, the control device 50 outputs a control signal to the fan motor to start rotation, and supplies the fan motor with, for example, constant voltage power to rotate the exhaust fan 35. As a result, the exhaust gas around the exhaust hole 24 of the support member 20 starts to be sucked from the exhaust hole 24.
[0028]
The control device 50 also outputs a control signal to the proportional valve drive device in accordance with the ignition signal to open the proportional valve 47 and also outputs a control signal to the spark plug 42 to connect the spark plug 42 and the burner 40. In the meantime, a spark discharge is generated to ignite the burner 40. The flame of the burner 40 ascends once gathering toward the center, as shown by the one-dot chain line in FIG. The rising flame and the heated air hit the bottom surface of the object M to be heated and spread radially along the bottom surface and move toward the side surface on the inner peripheral side of the support member 20. Thereby, the to-be-heated material M is heated. Here, since the step part 23 is formed in the supporting member 20, the flame and the heated air reach the outer peripheral part of the object to be heated M without leaving the bottom surface of the object to be heated. Move along.
[0029]
The exhaust gas generated by the combustion is sucked by the exhaust fan 35, and the exhaust hole 24 of the support member 20, the hollow space 22 of the support member 20, and the exhaust hole 15b of the inner top plate 15 are sequentially arranged from the space inside the support member 20. It passes through the exhaust passage 34 and is exhausted to the outside through the exhaust passage 34 through the exhaust port 14b.
[0030]
According to the cooking furnace according to the present embodiment, as shown in FIG. 3, the oblong exhaust holes 24 a of the support member 20 and the exhaust holes 15 b of the inner top plate 15 are arranged at alternate positions. Therefore, the distance between the oblong exhaust hole 24a of the support member 20 and the exhaust hole 15b of the inner top plate 15 is increased, and the exhaust gas and the heated air pass between the exhaust holes 24 and 15b. Due to the load at the time, the time during which the exhaust gas or the like stays below the bottom surface of the object to be heated M becomes longer, and the thermal efficiency is improved. Further, since the positional relationship between the exhaust holes 24 and 15b is determined, there is no variation in the time during which the exhaust gas or the like stays below the bottom surface of the article to be heated M, and the thermal efficiency is stabilized.
[0031]
Furthermore, according to the cooking furnace according to the present embodiment, the top plate 14 is provided with the convex portions 14c, and the concave portions 15c and 25 are provided at the corresponding positions of the inner top plate 15 and the support member 20, respectively. When the plate 15 and the support member 20 are placed on the top plate 14, the concave portions 15 c and 25 of the inner top plate 15 and the support member 20 and the convex portions 14 c of the top plate 14 are fitted to each other, thereby supporting the member 20. The positional relationship between the oblong exhaust hole 24a and the exhaust hole 15b of the inner top plate 15 can be easily determined.
[0032]
Next, it will be described with specific numerical values that the thermal efficiency is improved by the cooking furnace according to the present embodiment. As a comparative example, an oblong exhaust hole is formed in the support member 20, and the exhaust hole of the support member 20 and the exhaust hole 15b of the inner top plate 15 are arranged at positions facing each other without being alternately arranged. And the other structure used the thing similar to the cooking furnace concerning this Embodiment.
[0033]
First, in the cooking furnace according to the present embodiment, a heated object is placed on the support member 20, the burner 40 is burned, and the theory of exhaust gas discharged from the exhaust port 14b based on JIS standards. Carbon monoxide concentration and thermal efficiency in dry combustion gas were measured. Further, the carbon monoxide concentration and the thermal efficiency in the theoretical dry combustion gas of the exhaust gas were measured in the same manner for the cooking furnace of the comparative example. The result is shown in FIG. In FIG. 5, the code | symbol 71 shows the relationship between the carbon monoxide density | concentration in the theoretical dry combustion gas in the cooking furnace according to this Embodiment, and thermal efficiency, and the code | symbol 72 is in the theoretical dry combustion gas in the cooking furnace of the comparative example. It shows the relationship between carbon monoxide concentration and thermal efficiency. As is clear from this figure, as an example, the thermal efficiency when the carbon monoxide concentration in the theoretical dry combustion gas is 0.14% is about η ₁ % in the cooking furnace of the comparative example, whereas this implementation is In the cooking furnace according to this embodiment, it is about η ₂ %, and the cooking furnace according to the present embodiment has improved thermal efficiency compared to the comparative example.
[0034]
In addition, this invention is not limited to the said embodiment, A various deformation | transformation is possible. For example, in the above-described embodiment, the oval exhaust holes 24a and the circular exhaust holes 24b are alternately provided in the support member 20. However, all the oblong exhaust holes are provided without providing the circular exhaust holes 24b. It may be 24a. Further, the shape of the exhaust hole 24 is not limited to the oblong shape as shown in FIG. 1 or 2, and may be a rectangle or the like. Further, the exhaust holes 24 of the support member 20 and the exhaust holes 15b of the inner top plate 15 may both be circular and arranged alternately.
[0035]
Moreover, in the said embodiment, although the convex part 14c was provided in the top plate 14, and the recessed parts 15c and 25 fitted to the convex part 14c were provided in the inner top plate 15 and the supporting member 20, a convex part and a recessed part are opposite. Anyway. Further, without providing the convex portion 14 c on the top plate 14, a convex portion may be provided on one of the support member 20 and the inner top plate 15 and a concave portion may be provided on the other side at a location where the support member 20 and the inner top plate 15 are in contact. .
[0036]
Further, the positioning means is not limited to the convex portion and the concave portion used in the above embodiment, and may be a mark, for example. This mark may be formed by applying a paint of a predetermined color on the top plate 14, the inner top plate 15 and the support member 20, or on the inner top plate 15 and the support member 20, or by forming a notch. Alternatively, it may be formed by convex portions or concave portions having a predetermined shape.
[0037]
Further, the number of locations where positioning means such as convex portions, concave portions, and marks are provided is not limited to one, and a plurality of locations may be provided. In this case, as shown in FIG. 6, the positions 73 and 74 where the positioning means are provided are preferably provided at positions deviating from a point-symmetrical position with respect to the center of the support member 20. This is because the support member 20 and the inner top plate 15 can be positioned at a plurality of positions, and the exhaust holes 24a of the support member 20 and the exhaust holes 15b of the inner top plate 15 are arranged not in a staggered positional relationship. This is to prevent this.
[0038]
Further, in the above embodiment, only one burner 40 is disposed in the furnace body 10, but two or more burners 40 may be provided, and a grill burner is additionally provided in addition to the ring burner 40. May be. Moreover, the cooking furnace may be not only portable but also incorporated in the system kitchen.
[0039]
【The invention's effect】
As described above, according to the cooking furnace according to any one of claims 1 to 3, since the exhaust holes arranged at alternate positions are provided in the support member and the plate-like member, the exhaust gas is not covered. There is an effect that the residence time under the bottom surface of the heated object becomes longer and variations in the time are eliminated, so that the thermal efficiency can be improved and stabilized.
[0040]
According to the cooking furnace of claim 2, the positioning means for positioning the support member and the plate member so that the positional relationship between the support member side exhaust hole and the plate member side exhaust hole is constant. In addition to the above effects, the positional relationship between the support member side exhaust holes and the plate member side exhaust holes can be easily determined.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a configuration of a cooking furnace according to an embodiment of the present invention.
FIG. 2 is a perspective view showing a support member of the cooking wood furnace shown in FIG.
3 is a cross-sectional view taken along line II of the cooking furnace shown in FIG. 1. FIG. 4 is a perspective view showing positioning means of the cooking furnace shown in FIG.
FIG. 5 is a characteristic diagram showing the thermal efficiency of the cooking furnace shown in FIG. 1 and the comparative cooking furnace.
FIG. 6 is an explanatory diagram showing the position of positioning means in a cooking furnace according to another embodiment of the present invention.
FIG. 7 is a cross-sectional view illustrating a configuration of an example of a flame-exposure-type cooking furnace.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Furnace main body 14 Top plate 14c Convex part 15 Inner top plate 15b Exhaust hole 15c Recess 20 Support member 22 Hollow space 24 Exhaust hole 25 Recess 34 Exhaust passage 35 Exhaust fan 40 Burner M

Claims (3)

A burner for heating an object to be heated;
A support member that has a hollow space inside and supports the object to be heated and surrounds the flame of the burner so that the flame of the burner is not exposed to the outside;
A support that is formed in the support member, communicates the space surrounded by the support member with the hollow space inside the support member, and guides exhaust gas generated by combustion of the burner from the space surrounded by the support member to the hollow space inside the support member. A member side exhaust hole;
An exhaust passage for exhausting the exhaust gas from the burner combustion to the outside;
A plate-like member that is provided on the lower side of the support member and protects the burner from being blown out from an object to be heated;
A plate-like member side exhaust hole that is formed in this plate-like member and communicates the hollow space inside the support member and the exhaust passage,
The supporting furnace side exhaust hole and the plate-like member side exhaust hole include holes arranged at alternate positions. 2. A positioning means for positioning the support member and the plate member so that a positional relationship between the support member side exhaust hole and the plate member side exhaust hole is constant. The described cooking furnace. The cooking furnace according to claim 1 or 2, wherein the support member side exhaust holes and the plate-like member side exhaust holes arranged at alternate positions are holes each having a shape extending in the circumferential direction.

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