阅读说明：本技术 加热烹调装置 (Heating cooking device ) 是由 双和祥二 木内草真 于 2021-05-18 设计创作，主要内容包括：本发明提供一种加热烹调装置,具有：加热室,其收纳有煮饭锅；多个表面燃烧式的燃烧部；以及腔室,其设置于燃烧部的下方,向燃烧部供给燃料气体和空气的混合气体,腔室具有：底壁；侧壁；以及上壁,其形成有多个贯通孔,燃烧部与各个贯通孔对应地朝向煮饭锅的底面能够拆装地安装于上壁的上表面,腔室具备加强肋,该加强肋连接于上壁和底壁来防止上壁变形。(The present invention provides a heating cooking device, comprising: a heating chamber in which a rice cooker is accommodated; a plurality of surface combustion type combustion sections; and a chamber provided below the combustion unit and configured to supply a mixed gas of the fuel gas and air to the combustion unit, the chamber including: a bottom wall; a side wall; and an upper wall formed with a plurality of through holes, the combustion part being detachably mounted to an upper surface of the upper wall toward a bottom surface of the rice cooker in correspondence with each of the through holes, the chamber including reinforcing ribs connected to the upper wall and the bottom wall to prevent deformation of the upper wall.)

1. A heating cooking device comprising a heating chamber for accommodating at least a part of a cooking container and a heating unit for heating the cooking container accommodated in the heating chamber,

the heating unit has:

a plurality of surface combustion type combustion sections; and a chamber provided below the combustion section and configured to supply a mixed gas of fuel gas and air to the combustion section,

the chamber has: a bottom wall; a side wall erected from the bottom wall; and an upper wall erected on the upper end of the side wall and formed with a plurality of through holes,

the combustion part is detachably mounted on the upper surface of the upper wall toward the bottom surface of the cooking container corresponding to each through hole,

the chamber is provided with reinforcing ribs connected to the upper wall and the bottom wall to prevent deformation of the upper wall.

2. The heating cooking apparatus according to claim 1,

the combustion section has: an outer peripheral side combustion portion that heats an outer peripheral portion of a bottom surface of the cooking container from below; and an inner peripheral side combustion part for heating the bottom surface of the cooking container from below at a position closer to the inner peripheral side than the outer peripheral side combustion part,

the reinforcing ribs divide the interior of the chamber into an outer peripheral side chamber that supplies the mixed gas to the outer peripheral side combustion portion and an inner peripheral side chamber that supplies the mixed gas to the inner peripheral side combustion portion.

3. The heating cooking apparatus according to claim 2,

supply paths for supplying the mixed gas are connected to the outer peripheral side chamber and the inner peripheral side chamber, respectively, and the supply amounts of the mixed gas supplied to the outer peripheral side chamber and the inner peripheral side chamber via the supply paths can be controlled, respectively.

4. The heating cooking apparatus according to claim 3,

the outer peripheral side combustion portion and the inner peripheral side combustion portion are separated by a distance to the extent that the other does not heat the cooking container by heat of the other.

5. The heating cooking apparatus according to claim 3,

the outer peripheral side combustion portion and the inner peripheral side combustion portion are arranged in a ring shape, and an interval between an outermost annular row of the inner peripheral side combustion portion and an annular row of the outer peripheral side combustion portion is larger than an interval between annular rows of the inner peripheral side combustion portion.

6. The heating cooking apparatus according to claim 3,

a heat insulating wall is provided between an inner peripheral side of the outer peripheral side combustion portion and an outer peripheral side of the inner peripheral side combustion portion.

7. The heat cooking apparatus according to any one of claims 1 to 6,

the cooking container is housed in the heating chamber from above, and rollers for guiding the cooking container in the vertical direction are attached to the periphery of the heating chamber.

8. The heat cooking apparatus according to any one of claims 1 to 6,

the chamber has a support leg on the upper wall for supporting the cooking container.

9. The heating cooking apparatus according to claim 8,

the support legs are located above the reinforcing ribs.

Technical Field

The present invention relates to a heating cooking apparatus such as a rice cooking apparatus using fuel gas.

Background

Conventionally, various heating and cooking apparatuses using natural gas or propane gas as fuel have been known.

For example, japanese patent No. 5975765 discloses a heating cooking device including a heating chamber for accommodating a container to be heated and a heating unit for heating the container to be heated. The heating unit has: a first chamber to which a mixed gas of fuel gas and air is supplied; a second chamber in communication with the first chamber; and a plurality of combustion parts which are uniformly arranged in the second chamber and burn the mixed gas.

Japanese patent application laid-open No. 2013-78535 describes a rice cooking device including: an inner ring burner disposed at a position for heating the vicinity of the center portion of the bottom surface of the rice cooker; and an outer ring burner which is disposed at a position laterally heating an outer peripheral portion of the bottom surface of the rice cooker so as to burn toward a central portion of the bottom surface, and which supplies a mixed gas of the fuel gas and the air to the mixed gas chamber of the inner ring burner and the mixed gas chamber of the outer ring burner, respectively.

In the heating cooker described in japanese patent No. 5975765, although the cooking container is uniformly heated and scorching due to local heating is less likely to occur, there is a possibility that the upper surface of the second chamber may be deformed when the combustion part is attached to and detached from the second chamber or when an object falls onto the heating unit.

When the upper surface of the second chamber is deformed in this manner, not only is it difficult to attach and detach the combustion section, but also the protruding combustion section is inclined with respect to the bottom surface of the cooking container, which causes unevenness and a reduction in thermal efficiency.

In the rice cooking device described in japanese patent application laid-open No. 2013-78535, the inner ring burner is directed upward, the outer ring burner is directed laterally, and the outer ring burner is not disposed toward the pot, so that the thermal efficiency is poor. Further, since the mixed gas chamber of the outer burner and the outer burner which are horizontally arranged are separated, the lateral width of the entire apparatus becomes wide, and in particular, the apparatus may be heavy in a business oven in which a plurality of rice cooking apparatuses are arranged side by side.

Disclosure of Invention

The invention provides a heating cooking device which has high chamber strength, good thermal efficiency, simple and compact structure and is not easy to deform.

One aspect of the present invention is a heating cooking apparatus including a heating chamber for accommodating at least a part of a cooking container, and a heating unit for heating the cooking container accommodated in the heating chamber, the heating unit including: a plurality of surface combustion type combustion sections; and a chamber provided below the combustion unit and configured to supply a mixed gas of fuel gas and air to the combustion unit, the chamber including: a bottom wall; a side wall erected from the bottom wall; and an upper wall that is erected on an upper end of the side wall and has a plurality of through holes, wherein the combustion portion is detachably attached to an upper surface of the upper wall toward a bottom surface of the cooking container corresponding to each of the through holes, and the chamber includes reinforcing ribs that are connected to the upper wall and the bottom wall to prevent deformation of the upper wall.

Another aspect of the present invention is a heating cooking apparatus, wherein the combustion unit includes: an outer peripheral side combustion portion that heats an outer peripheral portion of a bottom surface of the cooking container from below; and an inner peripheral side combustion portion that heats the bottom surface of the cooking container from below at a position closer to an inner peripheral side than the outer peripheral side combustion portion, the reinforcing rib dividing the interior of the chamber into an outer peripheral side chamber that supplies the mixed gas to the outer peripheral side combustion portion and an inner peripheral side chamber that supplies the mixed gas to the inner peripheral side combustion portion.

Another aspect of the present invention is a heating cooking apparatus, wherein supply paths for supplying the mixed gas are connected to the outer peripheral side chamber and the inner peripheral side chamber, respectively, and the supply amounts of the mixed gas supplied to the outer peripheral side chamber and the inner peripheral side chamber via the supply paths can be controlled, respectively.

Another aspect of the present invention is a heating cooking apparatus, wherein the outer peripheral side combustion portion and the inner peripheral side combustion portion are separated by a distance to such an extent that the other does not heat the cooking container by heat of the one.

Another aspect of the present invention is a heating cooking apparatus, wherein the outer peripheral side combustion portion and the inner peripheral side combustion portion are annularly arranged, and an interval between an outermost annular row of the inner peripheral side combustion portion and an annular row of the outer peripheral side combustion portion is larger than an interval between annular rows of the inner peripheral side combustion portion.

Another aspect of the present invention is a heating cooking apparatus, wherein a heat insulating wall is provided between an inner peripheral side of the outer peripheral side combustion portion and an outer peripheral side of the inner peripheral side combustion portion.

Another aspect of the present invention is a heating cooking apparatus, wherein the cooking container is housed in the heating chamber from above, and a roller that guides the cooking container in a vertical direction is attached to a peripheral edge of the heating chamber.

Another aspect of the present invention is a heating cooking apparatus, wherein the chamber includes a support leg for supporting the cooking container on the upper wall.

Another aspect of the present invention is a heating cooking apparatus, wherein the support leg is located above the reinforcing rib.

According to one aspect of the present invention, since the reinforcing rib connecting the bottom wall and the upper wall of the chamber is provided, the upper wall of the chamber is not easily deformed when the combustion section is attached to and detached from the upper wall or when an object falls on the chamber, and the like, and it is possible to prevent the combustion section from being attached to and detached from the upper wall due to deformation of the upper wall or the combustion section from being inclined, which results in a reduction in thermal efficiency, and also prevent the chamber from being deformed due to heat during cooking.

Further, since all the combustion portions face the bottom surface of the cooking container, thermal efficiency is high, and the lateral width is reduced as compared with the case where the combustion portions are arranged in the lateral direction.

The combustion section further includes: an outer peripheral combustion portion that heats an outer peripheral portion of a bottom surface of the cooking container from below; and an inner peripheral side combustion portion that heats the bottom surface of the cooking container from below at a position closer to the inner peripheral side than the outer peripheral side combustion portion. If the reinforcing ribs divide the interior of the chamber into an outer peripheral side chamber for supplying the mixed gas to the outer peripheral side combustion portion and an inner peripheral side chamber for supplying the mixed gas to the inner peripheral side combustion portion, the mixed gas can be supplied to the combustion portions, respectively, and since the combustion portions heat the bottom surface of the cooking container uniformly, cooking can be performed uniformly, and the structure of the chamber for supplying the mixed gas to the combustion portions is also simple.

Further, the supply paths for supplying the mixed gas are connected to the outer peripheral side chamber and the inner peripheral side chamber, respectively, and the supply amounts of the mixed gas supplied to the outer peripheral side chamber and the inner peripheral side chamber through the supply paths can be controlled, respectively, so that the difference in the level of heating power on the outer peripheral side and the inner peripheral side of the heating and cooking container can be provided with a simple structure. This makes it possible to promote convection in the cooking container, to perform high-quality cooking, and to optimally balance the heating power on the outer periphery side and the heating power on the inner periphery side in accordance with the type and progress of cooking.

The outer peripheral combustion part and the inner peripheral combustion part are separated by a distance to the extent that the other part does not heat the cooking container by heat of the other part, or a heat insulating wall is provided between the inner peripheral side of the outer peripheral combustion part and the outer peripheral side of the inner peripheral combustion part. Thus, even if one of the burners burns and the other burns, the cooking container can be heated accurately.

Further, since the outer peripheral side combustion section and the inner peripheral side combustion section are arranged in a ring shape and the interval between the outermost annular row of the inner peripheral side combustion section and the annular row of the outer peripheral side combustion section is larger than the interval between the annular rows of the inner peripheral side combustion section, the replacement workability of the outer peripheral side combustion section which is replaced relatively much is improved.

Further, when the cooking container is housed in the heating chamber from above, the roller for guiding the cooking container in the vertical direction is attached to the peripheral edge of the heating chamber, and the cooking container can be easily attached and detached.

Further, since the upper wall of the chamber is provided with the support legs for supporting the bottom surface of the cooking container, the cooking containers having different sizes can be used. Thus, even if the weight of the cooking container is applied to the upper wall of the chamber via the support legs, the chamber reinforced by the reinforcing ribs is not easily deformed.

Drawings

The above and other objects and features of the present invention will become apparent from the following description of the embodiments with reference to the accompanying drawings. In these drawings:

fig. 1 is a vertical sectional view showing a heating cooking apparatus according to a first embodiment.

Fig. 2 is a plan sectional view showing a heating cooking apparatus according to the first embodiment.

Fig. 3 is a perspective view of the combustion unit according to the first embodiment.

Fig. 4 is an enlarged sectional view of a main portion of the heating cooking apparatus according to the first embodiment.

Fig. 5 is a vertical sectional view showing a heating cooking apparatus according to a second embodiment.

Fig. 6 is a plan sectional view showing a heating cooking apparatus according to a second embodiment.

Fig. 7 is a vertical sectional view showing a heating cooking apparatus according to a third embodiment.

Detailed Description

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Needless to say, the present invention is not limited to the embodiments.

[ first embodiment ]

A first embodiment of the present invention will be described with reference to fig. 1 to 4.

Fig. 1 is a longitudinal sectional view of a heating cooking device, fig. 2 is a top sectional view of the heating cooking device, fig. 3 is a perspective view of a combustion portion, and fig. 4 is an enlarged sectional view of a main portion of the heating cooking device.

As shown in fig. 1 and 2, a heating/cooking device 1 of the present embodiment includes a heating chamber 3 capable of accommodating a rice cooker 2 as a heating/cooking container, and a heating unit 4 for heating the rice cooker 2 accommodated in the heating chamber 3.

The rice cooker 2 is composed of a pot main body 20 having a circular shape in plan view with an open upper surface and a lid 21 capable of closing the upper surface of the pot main body 20, and a flange piece 22 is projected along the outer periphery of the pot main body 20.

The heating chamber 3 is a recess portion which is opened upward and has a circular shape in a plan view, and the outer peripheral surface of the heating chamber 3 is covered with a heat insulating material 30.

The heating chamber 3 has a diameter larger than the diameter of the pot main body 20 and smaller than the diameter of the flange piece 22. Therefore, the portion of the rice cooker 2 below the flange piece 22 can be received from above in the heating chamber 3.

A roller 34 for guiding the rice cooker 2 in the up-down direction is provided on the periphery of the upper portion of the heating chamber 3. Specifically, a projecting piece 31 is formed toward the center of the upper peripheral edge of the heating chamber 3, and a support wall 32 is provided at the tip of the projecting piece 31 in the vertical direction. A plurality of air discharge slits 33 are formed in the upper end of the support wall 32.

A roller 34 is attached to a lower portion of the support wall 32. The roller 34 is rotatable about an axis along the tangential direction of the heating chamber 3, and is guided in the vertical direction when the rice cooker 2 is moved into and out of the heating chamber 3.

When the rice cooker 2 is accommodated in the heating chamber 3, the upper end of the support wall 32 contacts the lower surface of the flange piece 22 to support the rice cooker 2. Since the cutout 33 is formed at the upper end of the support wall 32, the heating chamber 3 in which the rice cooker 2 is housed communicates with the outside of the heating chamber 3 through the cutout 33.

The heating unit 4 includes a plurality of surface combustion type combustion portions 5 and a chamber 6 for supplying a mixed gas of a fuel gas (natural gas, propane gas, or the like) and air to the combustion portions 5.

The combustion part 5 is made of a heat-resistant metal, and as shown in fig. 3 and 4, includes a cylindrical body 50 having open upper and lower end surfaces, a planar combustion part 51 attached to the upper end surface of the cylindrical body 50, and a flange 52 extending from the outer periphery of the lower end of the cylindrical body 50.

The planar combustion portion 51 is a porous material and is formed by knitting metal fibers in a knitted form or the like. The planar combustion portion 51 is fixed to the upper end of the cylindrical body 50 by welding or the like.

A plurality of (4, left and right) screw insertion holes 53 are formed in the flange 52 at equal intervals in the circumferential direction.

As shown in FIG. 2, the combustion section 5 is composed of an outer peripheral side combustion section 5A for heating the outer peripheral portion of the bottom surface of the rice cooker 2 from below, and an inner peripheral side combustion section 5B for heating the bottom surface of the rice cooker 2 from below at a position on the inner peripheral side of the outer peripheral side combustion section 5A.

In the present embodiment, the outer peripheral side combustion portions 5A are 18 in number and are arranged in a ring shape at equal intervals so as to be positioned directly below the outer peripheral portion of the bottom surface of the rice cooker 2.

The inner peripheral side combustion part 5B is arranged in 1 number directly below the center of the bottom surface of the rice cooker 2, 6 numbers are formed at equal intervals on the outer side thereof, and 12 numbers are formed at equal intervals in a ring shape concentric with the rice cooker 2 on the outer side thereof.

The interval P1 between the outermost annular row of the inner peripheral side combustion portion 5B and the annular row of the outer peripheral side combustion portion 5A is larger than the interval P2 between the annular rows of the inner peripheral side combustion portion 5B. The interval P1 is set to the following degree: when the outer peripheral sides of the outer peripheral side combustion portion 5A and the inner peripheral side combustion portion 5B are combusted in any one of the delay combustion portions and the combustion in the other combustion portion is stopped, the other delay combustion portion is affected by the heat of the one combustion portion, such as the ignition due to the heat of the delay combustion portion of the one combustion portion, and the other combustion portion does not heat the rice cooker 2.

Further, since the outer peripheral combustion section 5A is replaced more frequently, the interval P1 between the outermost annular row of the inner peripheral combustion section 5B and the annular row of the outer peripheral combustion section 5A is set to be larger than the interval P2 between the annular rows of the inner peripheral combustion section 5B, and the replacement work is easy.

In the present embodiment, the interval P2 between the annular rows of the inner peripheral combustion section 5B is arranged at intervals of 70mm, and the interval P1 between the outermost inner peripheral combustion section 5B and the outer peripheral combustion section 5A is arranged at intervals of 85 mm.

The chamber 6 has a cylindrical shape having substantially the same diameter as the pot main body 20 of the rice cooker 2, and is provided in the heating chamber 3 at a lower position with a space from the bottom surface of the rice cooker 2 accommodated in the heating chamber 3.

The chamber 6 has: a bottom wall 60; a side wall 61 erected from a peripheral edge of the bottom wall 60; and an upper wall 62 which is erected on the upper end of the side wall 61 and covers the entire internal space of the chamber 6.

A through hole 63 is formed in the upper wall 62 at a position where the combustion portion 5 is provided.

The through hole 63 is circular with a diameter smaller than the inner diameter of the cylindrical body 50 of the combustion part 5. Screw holes 64 corresponding to the screw insertion holes 53 of the combustion part 5 are formed at equal intervals in a ring shape around the through hole 63. In the present embodiment, the screw hole 64 is formed to penetrate the upper wall 62, but the present invention is not limited thereto, and may be formed in a bottomed shape. In this case, the mixed gas is less likely to leak.

The combustion section 5 is detachably attached to the upper surface of the upper wall 62 so as to correspond to the respective through holes 63.

The flange 52 of the combustion part 5 is overlapped on the upper surface of the upper wall 62, and the screw 54 inserted through the screw insertion hole 53 is screwed into the screw hole 64, whereby the combustion part 5 is attached to the upper surface of the chamber 6 so that the planar combustion part 51 faces the bottom surface of the pot main body 20 of the rice cooker 2. The interval between the planar combustion part 51 and the bottom surface of the pot main body 20 of the rice cooker 2 is about 30 mm.

Inside the chamber 6, reinforcing ribs 65 are provided, which ribs 65 are connected to the upper wall 62 and the bottom wall 60 to prevent the upper wall 62 from being deformed. The bottom wall 60, the side wall 61, the upper wall 62, and the reinforcing ribs 65 of the chamber 6 are integrally formed by welding or the like.

The reinforcing ribs 65 are provided between the inner peripheral side of the outer peripheral side combustion portion 5A and the outer peripheral side of the inner peripheral side combustion portion 5B. The reinforcing rib 65 extends in the circumferential direction of the chamber 6, and divides the inside of the chamber 6 into an outer peripheral side chamber 6A for supplying the mixed gas to the outer peripheral side combustion portion 5A and an inner peripheral side chamber 6B for supplying the mixed gas to the inner peripheral side combustion portion 5B.

Supply paths 7A and 7B for supplying a mixed gas of fuel gas (natural gas or propane gas) and air are connected to the outer peripheral side chamber 6A and the inner peripheral side chamber 6B via the bottom wall 60, respectively. Further, the supply amounts of the mixed gas to be supplied to the outer peripheral side chamber 6A and the inner peripheral side chamber 6B through the supply paths 7A and 7B can be controlled, respectively. That is, although not shown, the supply paths 7A and 7B are branched from a mixed gas supply pipe to which a fuel gas supply pipe and an air supply pipe are connected, and a flow rate adjusting device (orifice or valve) for adjusting the supply amount of the mixed gas is provided in each of the supply paths 7A and 7B. The flow rate of the mixed gas may be adjusted manually or by a controller connected to a flow rate adjusting device.

Although not shown, the chamber 6 is provided with a safety device that comes into contact with the bottom surface of the pot main body 20 of the rice cooker 2 to detect the temperature, and stops the supply of the mixed gas to the supply paths 7A and 7B when the temperature of the rice cooker 2 becomes equal to or higher than a set value.

Flame detectors, not shown, are provided in the outer peripheral side chamber 6A and the inner peripheral side chamber 6B, respectively, to detect misfiring of the outer peripheral side combustion portion 5A and misfiring of the inner peripheral side combustion portion 5B.

When rice is cooked in the heating cooking device 1 with respect to the rice cooker 2 housed in the heating chamber 3, the flow rate adjusting device is turned on, and the mixed gas is supplied to the outer peripheral side chamber 6A and the inner peripheral side chamber 6B through the supply paths 7A and 7B, and is ignited by the ignition device, not shown. The flow rate ratio of the mixed gas supplied to the outer peripheral side chamber 6A and the inner peripheral side chamber 6B is set to 2: 1 in advance.

Thus, the rice cooker 2 is heated by the radiant heat from the planar combustion portion 51 of the combustion portion 5, and rice is cooked.

Since the combustion part 5 is disposed to cover the entire bottom surface of the rice cooker 2, the bottom surface of the rice cooker 2 is heated without leakage, and uniform rice cooking is performed. Further, since the amount of the mixture gas supplied to the outer peripheral side chamber 6A and the inner peripheral side chamber 6B is different, the heating power of the outer peripheral side combustion portion 5A and the heating power of the inner peripheral side combustion portion 5B are different, and therefore, convection in the rice cooker 2 can be promoted, and high-quality cooked rice can be obtained.

The flow rate ratio of the mixed gas supplied to the outer peripheral side chamber 6A and the inner peripheral side chamber 6B is appropriately changed according to the amount of water in the rice cooker 2, which varies depending on the progress of rice cooking.

Depending on the progress of cooking, only one of the outer peripheral combustion portion 5A and the inner peripheral combustion portion 5B may be combusted, and the supply of the mixed gas may be stopped to stop the combustion of the other. Since the outer peripheral combustion portion 5A and the inner peripheral combustion portion 5B are disposed at a sufficient distance from each other, the other does not heat the rice cooker 2, for example, because the other is ignited by heat (the mixed gas remaining in the cavity 6 is used as fuel).

When the combustion part 5 is attached at the time of manufacture, or when the screw 54 for fixing the combustion part 5 is attached or detached at the time of replacement for long-term use, an external force is applied to the upper wall 62 of the chamber 6. Since the reinforcing ribs 65 are provided, the deformation of the upper wall 62 can be prevented.

Further, by providing the reinforcing ribs 65, even if an object falls on the upper wall 62 during cooking or the like, the upper wall 62 can be prevented from being deformed. Further, even if the thickness of the upper wall 62 is relatively thin, deformation of the chamber 6 due to heat during cooking can be prevented.

[ second embodiment ]

A second embodiment of the present invention will be described below with reference to fig. 5 and 6. Note that the same portions as those in the first embodiment will not be described, and different portions will be mainly described.

In the second embodiment, a heat insulating wall 8 is provided on the upper surface of the upper wall 62 of the chamber 6 so as to stand along the circumferential direction of the chamber 6 between the inner circumferential side of the outer circumferential side combustion portion 5A and the outer circumferential side of the inner circumferential side combustion portion 5B and above the reinforcing rib 65. The heat insulating wall 8 is disposed between the outer peripheral side combustion portion 5A and the inner peripheral side combustion portion 5B with a gap between the heat insulating wall 8 and the bottom surface of the rice cooker 2 so as not to obstruct the exhaust from the inner peripheral side combustion portion 5B to the outside of the heating chamber 3.

According to the present embodiment, even if the distance between the inner peripheral side of the outer peripheral side combustion portion 5A and the outer peripheral side of the inner peripheral side combustion portion 5B is not increased, the other side can be prevented from being ignited by heat of the one side, but may be the same distance as in the first embodiment.

[ third embodiment ]

A third embodiment of the present invention will be described below together with fig. 7. Note that the same portions as those in the first embodiment or the second embodiment will not be described, and different portions will be mainly described.

In the third embodiment, the support wall 32 is not provided on the periphery of the heating chamber 3, and at least 3 portions of the heat insulating wall 8 are extended upward to form the support legs 9 for supporting the bottom surface of the pot main body 20 of the rice cooker 2. The support legs 9 are provided at equal intervals in the circumferential direction, and can stably support the rice cooker 2.

The weight of the rice cooker 2 and its contents is applied to the upper wall 62 of the chamber 6 supporting the support legs 9, but the upper wall 62 is reinforced by the reinforcing ribs 65 and thus is not easily deformed.

In addition, even a small rice cooker 2 that cannot be hung from the peripheral edge of the heating chamber 3 can be heated and cooked if it is large enough to be supported by the support legs 9.

At this time, the supply of the air-fuel mixture to the outer peripheral side chamber 6A is stopped, and the combustion of the outer peripheral side combustion portion 5A can be stopped. In this case, the heat of the inner peripheral side combustion portion 5B is also blocked by the heat insulating wall 8, and therefore the outer peripheral side combustion portion 5A is not ignited.

[ other modifications ]

The present invention is not limited to the above embodiments. For example, the following is also included.

The heating cooking device of the present invention is not limited to the rice cooking device, and may be a device for performing other cooking.

The number and size of the combustion portions, the interval between the combustion portions, and the like can be appropriately selected according to the type of cooking, the size of the heating chamber, and the like. For example, in the present embodiment, P1 is made larger than P2, but the same may be used.

In the above embodiment, the heating cooking device includes one heating chamber and one chamber, but in the heating cooking device for business use, a plurality of heating chambers may be provided in parallel, and a chamber may be provided in each heating chamber, so that a large number of cookings can be simultaneously performed.

In this case, if the supply paths connected to all the outer peripheral chambers are controlled simultaneously and the supply paths connected to all the inner peripheral chambers are controlled simultaneously, the cooking quality does not vary between the cooking containers accommodated in the plurality of heating chambers.

In the above embodiment, the combustion section is fixed to the upper wall of the chamber by screws, but may be a fixing structure that is detachably attached so that the mixed gas does not leak, and for example, a through hole formed in the upper wall of the chamber may be a screw hole, and an external thread section formed at the lower end of the combustion section may be screwed into the screw hole.

In the above embodiment, the chamber is divided into the outer peripheral side chamber and the inner peripheral side chamber, but the inner peripheral side chamber may be further divided into a plurality of small chambers, and the supply paths may be connected to the outer peripheral side chamber and all the small chambers.

In this way, the flow rates of the mixed gas supplied through the three or more supply paths can be made different according to the type of cooking, etc., and the convection pattern in the cooking container can be made complicated, thereby further enabling high-quality cooking.

In the third embodiment, the support legs are formed by extending a part of the heat insulating wall to be high, but may be frame-shaped support legs that are detachably mounted on the upper surface of the upper wall of the chamber.

Each technical matter in any one embodiment may be applied to other embodiments as an example.