JP7321060B2 - gas cooker - Google Patents

Description

The present invention relates to a gas rice cooker.

Conventionally, a gas rice cooker disclosed in Patent Document 1 is known. This gas rice cooker includes a lower case, a gas burner, a rice cooker, an upper case, and an outer cover. The lower case is placed on the placement surface. A gas burner is provided in the lower case. A rice cooker has a bottom wall heated by a gas burner and a peripheral wall rising from the bottom wall. The upper case has a tubular shape and is placed on the lower case. The upper case covers the rice cooker with an annular first gap between itself and the peripheral wall of the rice cooker. The outer cover has a tubular shape and is fixed to the outer peripheral side of the upper case via a partition plate and a fixing metal fitting. The outer cover covers the upper case with a second annular gap between itself and the upper case.

When rice is to be cooked by this gas rice cooker, rice and water are placed in the rice cooker and the gas burner is ignited. Thereby, the bottom wall of the rice cooker is heated by the flame of the gas burner. At that time, combustion gas from the gas burner is discharged upward through the first gap between the peripheral wall of the rice cooker and the upper case. Therefore, the upper case is heated and the outer cover is exposed to the radiant heat of the upper case. Air below the gas rice cooker is discharged upward through the second gap between the upper case and the outer cover, preventing the outer cover from becoming excessively hot.

JP 2012-161392 A

However, in the above-described conventional gas rice cooker, there is concern that the temperature of the mounting surface may rise due to radiant heat from the upper case during rice cooking. For this reason, there are cases where improvement of the kitchen environment is desired. In addition, there are cases in which there are concerns about the material and durability of the table and shelf that constitute the mounting surface, and there are cases in which it is difficult to touch the mounting surface immediately after rice is cooked, and improvement in cleanability is required.

For this reason, it is conceivable to lengthen the leg members provided on the lower case and lengthen the distance from the mounting surface to the upper case so that the mounting surface is less likely to be heated by the radiant heat of the upper case. In some cases, there are concerns about the stability of the gas rice cooker and the feeling of narrowness in the kitchen due to the increase in size.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a gas rice cooker capable of suppressing the temperature rise of the mounting surface without giving rise to stability and feeling of narrowness of the kitchen. It is an issue that should be addressed.

A gas rice cooker of the present invention includes a lower case placed on a placement surface,
a gas burner provided in the lower case;
a rice cooker having a bottom wall heated by the gas burner and a peripheral wall rising from the bottom wall, and containing rice and water;
A cylinder is provided on the lower case and covers the rice cooker with an annular first gap between itself and the peripheral wall, and the combustion gas of the gas burner is directed upward through the first gap. an upper case for discharging;
It has a cylindrical shape and is fixed to the outer peripheral side of the upper case, covers the upper case with a second annular gap between itself and the upper case, and allows air from below to flow upward through the second gap. an outer cover that discharges into
A heat shield is provided on the mounting surface side of the second gap to shield the radiant heat of the upper case while ensuring an air flow.

In the gas rice cooker of the present invention, the heat shield provided in the second gap insulates the radiant heat of the upper case while securing the airflow flowing through the second gap from below to above. Therefore, it is difficult for the upper case to heat the mounting surface, and the temperature rise of the mounting surface can be suppressed. Moreover, it is not necessary to excessively lengthen the leg members provided on the lower case. The heat shield may reflect the radiant heat of the upper case, or may insulate the radiant heat of the upper case. The heat shield can suppress the temperature rise of the mounting surface if it is located on the mounting surface side of the second gap. can be reliably suppressed.

Therefore, the gas rice cooker of the present invention can suppress the temperature rise of the mounting surface without giving rise to stability and feeling of narrowness of the kitchen.

The heat shield may be fixed to the upper case and extend toward the outer cover, but is preferably fixed to the outer cover and extends toward the upper case. If the heat shield is fixed to the outer cover, the heat shield is separated from the upper case, and the heat is not transferred from the upper case to a high temperature. Therefore, the heat shield does not raise the temperature of the airflow, and the outer cover can be brought close to room temperature.

The outer cover can also extend to the outer peripheral side of the lower case. It is also preferable that the heat shield is positioned between the lower case and the outer cover. In this case, the heat shield positioned between the lower case and the outer cover can more reliably shield the radiant heat of the upper case and more reliably suppress the temperature rise of the mounting surface. The heat shield located between the lower case and the outer cover is fixed to the lower case and extends toward the outer cover because the lower case does not reach a very high temperature even during rice cooking. Alternatively, it may be fixed to the outer cover and extend toward the lower case.

It is preferable that the heat shield has a plurality of slits extending radially from the upper case or the lower case. In this case, it is easier to generate an airflow close to room temperature on the outer peripheral side of the second gap than when a slit extending in the circumferential direction is provided through the heat shield, so it is easier to suppress the temperature rise of the outer cover.

INDUSTRIAL APPLICABILITY The gas rice cooker of the present invention is stable and can suppress the temperature rise of the mounting surface without causing a feeling of narrowness in the kitchen. Therefore, if the gas rice cooker of the present invention is adopted, the kitchen environment can be improved. In addition, it is possible to eliminate concerns about the material and durability of the table and shelf that constitute the placement surface, and to improve the cleanability immediately after the rice is cooked.

FIG. 1 is a perspective view of the gas rice cooker of Example 1 as seen obliquely from above. FIG. 2 is a perspective view of the gas rice cooker of Example 1 as seen obliquely from below. 3 is a schematic cross-sectional view of a portion of the gas rice cooker of Example 1. FIG. FIG. 4 relates to the gas rice cooker of Example 1 and is a perspective view of one heat shield piece. FIG. 5 is an enlarged cross-sectional view of a main part of the gas rice cooker of Example 1. FIG. FIG. 6 is a graph showing the relationship between the ratio (%) of the communication area by the heat shield, the temperature of the mounting surface, and the temperature of the outer cover. FIG. 7 is an enlarged cross-sectional view of the main part of the gas rice cooker of Example 2. FIG. FIG. 8 is an enlarged cross-sectional view of a main part of the gas rice cooker of Example 3. FIG.

Embodiments 1 to 3 embodying the present invention will be described below with reference to the drawings.

(Example 1)
The gas rice cooker of Example 1 is for commercial use. This gas rice cooker includes a lower case 1, a gas burner 3, a rice cooker 5, an upper case 7, and an outer cover 9, as shown in FIGS.

The lower case 1 is made of enamel and has a bowl shape. The lower surface of the lower case 1 is provided with four leg members 11a to 11d extending downward. The lower case 1 is mounted on the mounting surface F by the leg members 11a to 11d.

A burner base 13 is fixed in the lower case 1, and a gas burner 3 is provided on the burner base 13. - 特許庁The gas burner 3 is connected to an ignition device 15 having an ignition lever 15a and the like, as well as a control device and a gas hose (not shown). At the center of the bottom surface of the lower case 1, an air intake 1a is formed for feeding air to the gas burner 3 through the burner base 13. As shown in FIG. Also, a sauce pan 17 is provided around the gas burner 3 on the lower case 1 .

The rice cooker 5 is made of cast aluminum alloy. The rice cooker 5 has a bottom wall 5a heated by the gas burner 3 and a peripheral wall 5b gradually rising from the bottom wall 5a. The peripheral wall 5b extends upward from the upper end of the upper case 7, and the rice cooker 5 is placed on the gas burner 3 from above the upper case 7. As shown in FIG. An annular flange portion 5c is formed at the upper end of the peripheral wall 5b and extends toward the outside with a slight upward slope. A tubular portion 5d extending substantially vertically is formed on the outer peripheral side of the flange portion 5c. An opening 5e that opens upward is formed inside the flange portion 5c.

The upper case 7 is made of enamel and has a cylindrical shape. The upper case 7 is placed on the lower case 1 . An upper portion of the upper case 7 is substantially flush with the tubular portion 5d of the rice cooker 5, and an annular exhaust port 7a is formed between the upper end of the upper case 7 and the tubular portion 5d. The upper case 7 covers the rice cooking pot 5 with a first annular gap C1 between itself and the peripheral wall 5b of the rice cooking pot 5 . The first gap C1 communicates with the gas burner 3 and also communicates with the exhaust port 7a.

A lid member 23 is placed on the brim portion 5c of the rice cooking pot 5. As shown in FIG. The lid member 23 has an upper lid 23b and an inner lid 23c through which the knob shaft 23a is inserted. The knob shaft 23a is provided with a knob 23d on the upper lid 23b and with a packing 23e between the knob shaft 23a and the inner lid 23c.

The outer cover 9 is made of stainless steel and has a cylindrical shape. The outer cover 9 is fixed to the outer peripheral side of the upper case 7 via a cylindrical partition plate 19 and fixing metal fittings 21 . Two handles 25 a and 25 b are fixed to the upper portion of the outer cover 9 .

The outer cover 9 covers the upper case 7 with an annular second gap C2 between itself and the upper case 7 . The upper end of the outer cover 9 is at substantially the same horizontal position as the upper end of the upper case 7 , and the lower end of the outer cover 9 is at substantially the same horizontal position as the lower end of the upper case 7 . An annular exhaust port 9 a is formed between the upper end of the outer cover 9 and the upper end of the upper case 7 .

As shown in FIG. 2, an annular plate-like heat shield 27 extending horizontally is fixed to the lower portion of the outer cover 9 . The heat shield 27 is a combination of three heat shield pieces 29a to 29c shown in FIG. Each of the heat shield pieces 29a to 29c has the same shape by punching and pressing a plate made of stainless steel, and has a specular gloss. The heat shield pieces 29a to 29c do not necessarily have to have specular gloss.

Each of the heat shield pieces 29a to 29c has a main body 31a extending horizontally in an arc shape with a central angle θ of 120°, and an overlapping margin 31b extending in the circumferential direction from the main body 31a on one end side of the main body 31a in the circumferential direction. there is A folded portion 31c folded back from the main body 31a is formed on the inner peripheral side of the main body 31a. In addition, on the outer peripheral side of the main body 31a, a flange portion 31d is formed which rises vertically from the main body 31a, and fixing margins 31e and 31f higher than the flange portion 31d are integrally formed with the flange portion 31d. there is The fixed margin 31e is positioned at one end in the circumferential direction, and the fixed margin 31f is positioned at the center in the circumferential direction.

A plurality of slits 31g radially extending from the inner peripheral side to the outer peripheral side are formed through the main body 31a. Rivet holes 31h to 31k are formed through the other end of the main body 31a, the overlapping margin 31b, the fixing margin 31e, and the fixing margin 31f, respectively. The other end side of the main body 31a of the heat shield piece 29a and the overlap margin 31b of the adjacent heat shield piece 29b are overlapped, and the other end side of the main body 31a of the heat shield piece 29b and the overlap margin 31b of the adjacent heat shield piece 29c are overlapped. are overlapped, the other end side of the body 31a of the heat shield piece 29b and the overlap margin 31b of the adjacent heat shield piece 29a are overlapped, and rivets (not shown) are inserted and fixed to the rivet holes 31h and 31i, respectively. Thus, the heat shield 27 is formed. The fixing margins 31e and 31f of the heat shield pieces 29a to 29c are brought into contact with the lower inner peripheral surface of the outer cover 9 on the mounting surface F side, so that the rivet holes of the outer cover 9 and the fixing margins 31e and 31f are in contact with each other. The rivets 33 are inserted and fixed to the rivet holes 31j and 31k, respectively. The heat shield 27 is thus fixed to the outer cover 9 . The heat shield 27 is located below the bottom wall 5a of the rice cooker 5. As shown in FIG.

As shown in FIG. 5, a third gap C3 is maintained between the folded portions 31c of the heat shield pieces 29a to 29c of the heat shield 27 and the upper case . The second gap C2 communicates with each slit 31g and the third gap C3. Therefore, in this gas rice cooker, the ratio of the area of communication of the second gap C2 at the position of the heat shield 27 is set to 35%, and the ratio of the area of the closed area of the second gap C2 by the heat shield 27 is set to 65%. ing. Also, the second gap C2 communicates with the exhaust port 9a.

When rice is to be cooked by this gas rice cooker, rice and water are put into the rice cooker 5 and the gas burner 3 is ignited. As a result, the gas burner 3 burns the fuel gas supplied from the gas hose with the air taken in from the air intake 1a under the control of the control device to generate a flame. The bottom wall 5a of the rice cooker 5 is heated by the flame. At that time, the combustion gas from the gas burner 3 is discharged upward through the first gap C1 between the peripheral wall 5b of the rice cooker 5 and the upper case 7 from the exhaust port 7a. Therefore, the upper case 7 is heated and the outer cover 9 is exposed to the radiant heat of the upper case 7 .

At this time, in this gas rice cooker, the heat shield 27 reflects the radiant heat of the upper case 7 with a closed area ratio of 65%. Therefore, it is difficult for the upper case 7 to heat the mounting surface F. As shown in FIG. Also, the leg members 11a to 11d provided on the lower case 1 have the same length as before, and are not excessively long.

In addition, since the heat shield 27 secures a communication area ratio of 35%, the air below the gas rice cooker is taken into the second gap C2 from the slits 31g and the third gap C3. It flows upward through C2 and is discharged upward from the exhaust port 9a. Therefore, the outer cover 9 is prevented from becoming excessively hot.

In particular, the heat shield 27 is fixed to the outer cover 9 and extends toward the upper case 7 . Therefore, the heat shield 27 and the upper case 7 are separated by the third gap C3, so that the heat shield 27 does not become hot due to heat transfer from the upper case 7 . Therefore, the heat shield 27 does not raise the temperature of the air flow, and the outer cover 9 can be brought close to normal temperature.

A plurality of slits 31g extending radially from the upper case 7 are formed through the heat shield 27. As shown in FIG. For this reason, the air inside each slit 31g on the side of the upper case 7 is heated by the upper case 7 and tends to generate an upward air current, while the air outside each slit 31g on the side of the outer cover 9 is pulled by the air inside. It is easy to generate an updraft. Therefore, since an air flow close to room temperature is likely to occur on the outer peripheral side of the second gap C2, it is easy to suppress the temperature rise of the outer cover 9 .

Therefore, this gas rice cooker can suppress the temperature rise of the mounting surface F without giving rise to stability and feeling of narrowness of the kitchen. Therefore, if this gas rice cooker is adopted, the kitchen environment can be improved. In addition, it is possible to eliminate concerns about the materials and durability of the table and shelf that constitute the mounting surface F, and to improve the cleanability immediately after rice cooking.

In addition, in this gas rice cooker, the heat shield 27 is formed by combining the heat shield pieces 29a to 29c of the same shape, so the number of parts is small and the increase in manufacturing cost is suppressed.

The temperature of the mounting surface F and the temperature of the outer cover 9 were measured by variously changing the communication area of the heat shield 27 . The results are shown in FIG. As shown in FIG. 6, it can be seen that the temperature rise of both the mounting surface F and the outer cover 9 can be suppressed when the ratio of the communicating area is 25 to 45%.

(Example 2)
In the gas rice cooker of Example 2, the outer cover 39 extends to the outer peripheral side of the lower case 1, as shown in FIG. The heat shield 27 is positioned between the lower case 1 and the outer cover 39 . Other configurations are the same as those of the first embodiment.

In this gas rice cooker, since the heat shield 27 is positioned between the lower case 1 and the outer cover 39, the radiant heat of the upper case 7 is more reliably reflected, and the temperature rise of the mounting surface F is more reliably suppressed. can do. Other functions and effects are the same as those of the first embodiment.

(Example 3)
In the gas rice cooker of Example 3, as shown in FIG. 8, the heat shield 28 is fixed to the lower case 1 and extends toward the outer cover 39 . The heat shield 28 is obtained by reversing the inner peripheral side and the outer peripheral side of the heat shield 27 of the first and second embodiments. That is, the heat shield 28 is composed of three heat shield pieces 30a to 30c in which the inner and outer circumferences of the three heat shield pieces 29a to 29c are reversed. Each heat shield piece 30a-30c has a body 32a similar to the body 31a of the heat shield pieces 29a-29c. A plurality of slits 32g radially extending from the inner peripheral side to the outer peripheral side are formed through the main body 32a. A folded portion 32c is formed on the outer peripheral side of the main body 32a, and a collar portion and fixing margins 32e and 32f are formed on the inner peripheral side of the main body 32a. Other configurations are the same as those of the second embodiment.

In this gas rice cooker, the lower case 1 does not reach a very high temperature even during cooking, so even if the heat shield 28 is fixed to the lower case 1, the same effects as those of the second embodiment can be obtained. .

In the above, the present invention has been described in accordance with Examples 1 to 3, but the present invention is not limited to the above Examples 1 to 3, and can be appropriately modified and applied without departing from the spirit of the present invention. Needless to say.

In Examples 1 to 3, the heat shields 27 and 28 are formed by combining the three heat shield pieces 29a to 29c and 30a to 30c. , 2 or 4 or more heat shield pieces may constitute the heat shield. Moreover, the heat shield does not have to be plate-like, and may be block-like. Furthermore, the heat shield may be composed of a heat insulating material such as a porous body. In addition, it is preferable that a plurality of slits extending in the radial direction are provided through the heat shield. It is good if it is done.

In Examples 1 to 3, the ratio of the communicating area of the second gap C2 is ensured by the slit 31g having a constant opening area. It may be configured to change the opening area by, for example, being configured so as to be movable in a wide range of directions. In this case, it is possible to adjust the degree of airflow by changing the opening area depending on the season.

INDUSTRIAL APPLICABILITY The present invention can be used for commercial rice cookers.

F... Placement surface 1... Lower case 3... Gas burner 5a... Bottom wall 5b... Surrounding wall 5... Rice cooker C1... First gap 7... Upper case C2... Second gap 9... Outer cover 27, 28... Heat shield 31g, 32g...Slit

Claims (4)

a lower case placed on the placement surface;
a gas burner provided in the lower case;
a rice cooker having a bottom wall heated by the gas burner and a peripheral wall rising from the bottom wall, and containing rice and water;
A cylinder is provided on the lower case and covers the rice cooker with an annular first gap between itself and the peripheral wall, and the combustion gas of the gas burner is directed upward through the first gap. an upper case for discharging;
It has a cylindrical shape and is fixed to the outer peripheral side of the upper case, covers the upper case with a second annular gap between itself and the upper case, and allows air from below to flow upward through the second gap. an outer cover that discharges into
A gas rice cooker according to claim 1, wherein a heat shield is provided on the mounting surface side of the second gap to shield the radiant heat of the upper case while ensuring an air flow. 2. The gas rice cooker according to claim 1, wherein said heat shield is fixed to said outer cover and extends toward said upper case. the outer cover extends to the outer peripheral side of the lower case,
3. The gas rice cooker according to claim 1, wherein said heat shield is positioned between said lower case and said outer cover. 4. The gas rice cooker according to any one of claims 1 to 3, wherein a plurality of slits radially extending from said upper case or said lower case penetrate through said heat shield.

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