JP2001147021A - Heating cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heating cooker capable of obtaining a high heat insulation effect by a heat insulation panel. SOLUTION: The heating cooker 1 comprises an outer case 10, an oven cabinet 4 provided in the case 10, heaters 2, 3 for heating a material 20 to be heated, and a heat insulation panel 5 provided on the outer surface of the cabinet 4. The panel 5 has a cover film 11 and a reinforcing member 12 airtightly covered with the film 11. Thus, an area 14 for containing the member 12 in the film 11 is held in a degassed state. The film 11 is made of a metal thin film having heat resistance and flexibility. The member 12 is a communicating porous material having heat resistance and rigidity.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooking device capable of obtaining a high heat insulating effect by using heat insulating panels.

[0002]

2. Description of the Related Art Conventional cooking devices such as ovens and oven toasters are housed in an outer box and an outer box.
An oven for storing the object to be heated, an electric heater for heating the object to be heated is provided in two upper and lower regions in the oven, and a tray or a wire mesh is provided in an intermediate region between the upper and lower heaters. Are arranged. In the heating cooking device, an object to be heated such as food is placed on a tray or a wire net in an oven storage and heated by upper and lower heaters.

[0003] A heating cooking apparatus that has a large amount of heat radiation from an oven storage has problems such as low heating efficiency, long heating time of an object to be heated, and consumption of a large amount of energy in heating the object to be heated. Have. In the heating cooking device, when the inside of the oven becomes high in temperature, the outer box provided around the oven is heated by the heat from the oven, and particularly the upper surface of the outer box becomes hot. When the outer box becomes hot, problems such as burns caused by a person touching the outer box are likely to occur.

[0004] In the conventional cooking device, the outer surface of the oven storage is covered with a heat insulating material such as glass fiber in order to reduce the amount of heat radiation from the oven storage.
However, the insulating material made of the glass fiber,
Since the heat insulation performance is not sufficient, the heat in the oven chamber escapes to the surroundings, the temperature in the oven chamber decreases, and the amount of heat applied to the object to be heated decreases.

Another prior art is disclosed in Japanese Patent Application Laid-Open No. Hei 7-2436.
No. 53 discloses this. In the cooking device according to the related art, an oven storage is configured by applying vacuum insulation technology used for a thermos. The oven storage has a double structure and includes an inner cylindrical container and an outer cylindrical container, and a region between the inner cylindrical container and the outer cylindrical container is kept in a degassed state. For this reason, a vacuum layer having excellent heat insulating performance is formed between the inner cylindrical container and the outer cylindrical container of the oven storage.

[0006]

However, in the heating and cooking apparatus according to the prior art disclosed in Japanese Patent Application Laid-Open No. 7-243653, the region between the inner cylindrical container and the outer cylindrical container is degassed. In order to keep the temperature in the oven, considerable strength and airtightness are required for the oven cabinet.

[0007] For this reason, the oven storage is made of a metal material having mechanical strength and capable of preventing invasion of outside air. Further, since the oven storage is required to have a high strength as described above, the inner cylindrical container and the outer cylindrical container each have a large thickness. However, since the metal material has a high thermal conductivity, if the inner cylindrical container and the outer cylindrical container have a large thickness, a large amount of heat is transmitted through the inside. Therefore, when the inner cylindrical container of the oven storage is heated by the heat generated from the heater, the heat of the inner cylindrical container is transmitted to the joint between the inner cylindrical container and the outer cylindrical container, and the joint is formed. The heat transmitted to the outer cylindrical container is transmitted to the outer cylindrical container and escapes to the periphery of the outer cylindrical container. As described above, the oven storage including the inner cylindrical container and the outer cylindrical container has a problem that the heat insulating performance is not sufficient.

[0008] In addition to the heating cooking device, a refrigerator is provided with a heat insulating material. In the refrigerator, a heat insulating panel is provided on the outer surface of the inner box of the refrigerator compartment. The heat insulation panel,
It has a cover film made of aluminum foil and a reinforcing member that is a communicating porous body made of polyurethane and is contained in the cover film, and the region where the reinforcing member is contained is kept in a degassed state. However, the insulation panel
The heat resistance temperature of the aluminum foil is about 120 ° C., and polyurethane, which is an organic material, is deformed at about 100 ° C. Therefore, when the temperature of the heat insulating panel becomes about 100 ° C. or higher, the degassing state cannot be maintained, and the heat insulating performance cannot be secured.

[0009] An object of the present invention is to solve the above-mentioned problems and to provide a heating cooking device that can obtain a high heat insulating effect by a heat insulating panel.

[0010]

SUMMARY OF THE INVENTION The present invention provides an outer case, an oven housed in the outer case for housing the object to be heated, a heater for heating the object to be heated in the oven case, A heat-insulating panel provided on an outer surface, wherein the heat-insulating panel has heat resistance and rigidity, and a reinforcing member in which a void is formed is hermetically sealed by a flexible and heat-resistant cover film. A cooking device wherein the region covered with the reinforcing member in the cover film is kept in a degassed state.

According to the present invention, the heat insulating panel has a high heat insulating performance because the region in which the reinforcing member is accommodated is kept in a degassed state. Further, since the reinforcing member having rigidity and having a void is accommodated in the flexible cover film, the inside of the cover film can be kept in a degassed state even under the atmospheric pressure. .

[0012] Further, since the reinforcing member is formed with a void,
Low bulk density and low heat conduction through the inside of the reinforcing member. Further, the cover film is made of the above-mentioned JP-A-7-243.
No. 653, the thickness is smaller than the inner cylindrical container and the outer cylindrical container constituting the oven chamber of the heating cooking device according to the prior art, and the amount of heat conduction transmitted through the inside of the cover film is small. The heat insulation panel has high heat insulation performance.

Further, the cover film according to the present invention is characterized by comprising a metal thin film.

According to the present invention, since the cover film is made of a metal thin film, gas molecules in the atmosphere cannot pass through the cover film. For this reason, in the area where the reinforcing member is accommodated in the cover film, high airtightness is ensured, and the amount of heat conduction by gas molecules in the area is small.

Although the metal material has a high thermal conductivity, the cover film is formed from a thin film, so that the amount of heat conduction inside the cover film is small. Therefore, the heat insulation panel has high heat insulation performance.

Further, the cover film made of the metal thin film of the present invention is characterized by being sealed by seam welding.

According to the present invention, the cover film comprises:
Since airtightness is ensured by seam welding, outside air cannot enter from the welded portion. Therefore, high airtightness is ensured in a region of the cover film in which the reinforcing member is accommodated. Therefore, the heat insulation panel has a small heat conduction amount by the gas molecules in the region where the reinforcing member is housed, and has high heat insulation performance.

Further, the reinforcing member of the present invention is characterized in that it is made of a heat-resistant inorganic material.

According to the present invention, since the reinforcing member is made of a heat-resistant inorganic material, it does not deform even when heated, unlike the prior art reinforcing member made of an organic material such as polyurethane. The degassed state of the area where the members are accommodated is maintained. Therefore, even if heat is applied to the reinforcing member, the heat insulating panel does not deteriorate in heat insulating performance.

[0020] The reinforcing member of the present invention is a communicating porous body.

According to the present invention, since the reinforcing member is a porous body, it has a low bulk density and a small amount of heat conduction inside the reinforcing member. Further, since the reinforcing member is a communicating porous body, and the respective holes are connected to each other without being independent, the inside of all the holes of the reinforcing member can be reliably degassed.

Further, the pore diameter of the reinforcing member, which is the communicating porous body of the present invention, is 100 μm or less.

The average value of the distance a gas molecule travels from collision with another gas molecule to the next collision is called a mean free path. The lower the pressure in the degassed space, the lower the mean free path. long. In the heat insulation panel according to the present invention, the hole diameter of the reinforcing member that is a communicating porous body is 100 μm or less. Smaller than the mean free path of the gas molecules inside. For this reason, the heat insulation panel can reliably perform vacuum degassing in the minute holes, and can obtain excellent heat insulation performance.

Further, the reinforcing member according to the present invention is characterized in that it contains an inorganic oxide that absorbs or reflects radiant heat.

The heat transferred by radiation increases significantly with increasing temperature. For this reason, heat transfer in a high temperature range is more susceptible to radiation than heat transfer in a low temperature range. In the heat insulating panel according to the present invention, since the reinforcing member contains an inorganic oxide that absorbs or reflects radiant heat, radiant heat can be shielded, and the amount of heat radiation due to radiation that increases at high temperatures can be reduced. Thereby, the heat insulation panel can be effectively insulated even in a high temperature range.

[0026]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below by taking an electric oven as an example. FIG. 1 is a front view showing a schematic configuration of a heating cooking device 1 according to one embodiment of the present invention. FIG. 2 is a cross-sectional view taken along line AA of FIG. The heating cooking device 1 includes an oven storage 4, an insulating panel 5, an outer box 10, an upper heater 2, a lower heater 3, and a tray 7. In the heating and cooking apparatus 1, the object to be heated 20 such as a meat piece is placed in a tray 7 stored in the oven storage 4.
It is placed on the top and heated by the upper heater 2 and the lower heater 3 provided in the oven storage 4.

The heating and cooking apparatus 1 has an electronic circuit for heating and controlling each of the heaters 2 and 3, an operation unit, and the like, and is capable of opening and closing a door 20 for opening and closing the object 20 and the tray 7. Are provided on the front, but the door, the electronic circuit, the operation unit, and the like are omitted in FIGS.

The oven storage 4 has a box shape with an open front, and has a ceiling wall 4b, a right side wall 4a, a left side wall 4d, and a back wall 4e.
And the bottom wall 4c. Each of the walls 4a to 4e is provided with each of the heat insulating panels 5a to 5e covering the outer surface. Each of the heat insulating panels 5a to 5e is a rectangular plate, and is in close contact with the outer surface of each of the walls 4a to 4e.
When the heat insulating panels 5a to 5e are collectively referred to, the subscripts a to e are used.
Is abbreviated as “insulation panel 5”.

On the side walls 4a, 4d of the oven storage 4, projecting ridges 8 for placing a tray 7 projecting in a substantially V-shape in a direction approaching each other and extending linearly in a direction perpendicular to the plane of FIG. Provided. The ridge 8 is formed by, for example, drawing. The tray 7 has a rectangular bottom surface, a peripheral edge rising, and is housed in the oven cabinet 4 with the bottom end portions placed on both left and right ridges 8.

The upper heater 2 and the lower heater 3 have an elongated columnar shape and extend in a direction perpendicular to the plane of FIG. Each of the heaters 2 and 3 has a heating resistor inside thereof, and generates heat when a current flows. The upper heater 2 is fixed to the inner surface of the ceiling wall 4b, and the lower heater 3 is fixed to the inner surface of the bottom wall 4c via a support 23.

The oven storage 4 for storing the object to be heated 20 is
It is housed in the outer box 10. The outer box 10 has a box shape with an open front, and includes a ceiling wall 10b, a right side wall 10a, a left side wall 10d, a back wall 10e, and a bottom wall 10c.

Next, the installation state of each of the heat insulating panels 5a to 5e provided in the oven storage 4 will be described in detail. The heat insulating panel 5a provided on the outer surface of the right side wall 4a is composed of two upper engaging pieces 6b and 2 provided on the outer surface of the right side wall 4a.
It is inserted and held between the two lower engaging pieces 6a. Two upper engaging pieces 6b and two lower engaging pieces 6a
Are provided at intervals in a direction perpendicular to the paper surface of FIG.

The heat insulating panel 5d provided on the outer surface of the left side wall 4d is inserted and held between two upper engaging pieces 6f and two lower engaging pieces 6e provided on the outer surface of the left side wall 4d. Have been. The two upper engagement pieces 6f and the two lower engagement pieces 6e are respectively provided at intervals in a direction perpendicular to the paper surface of FIG.

The heat insulating panel 5b provided on the outer surface of the ceiling wall 4b is inserted between two right engaging pieces 6g and two left engaging pieces 6h provided on the outer surface of the ceiling wall 4d. Has been held. The two right engagement pieces 6g and the two left engagement pieces 6h are provided at an interval in a direction perpendicular to the paper surface of FIG.

The heat insulating panel 5c provided on the outer surface of the bottom wall 4c is inserted between two right engaging pieces 6c and two left engaging pieces 6d provided on the outer surface of the bottom wall 4c. Has been held. The two right engagement pieces 6c and the two left engagement pieces 6d are respectively provided at intervals in a direction perpendicular to the paper surface of FIG.

The heat insulating panel 5e provided on the outer surface of the back wall 4e has a difference between two left engaging pieces 6i provided on the outer surface of the back wall 4e and two right engaging pieces 6j (not shown). Is held in place. The two left engagement pieces 6i and the two right engagement pieces 6j are provided at an interval vertically.

Each of the engaging pieces 6a to 6j has a substantially L-shape, and is formed so as to be bent substantially at right angles from a rising portion which rises vertically to the outer surface of each of the walls 4a to 4e and a free end of the rising portion. A bent portion, and a base end of the rising portion is formed on each wall 4a.
4e is vertically welded to the outer surface. Thermal insulation panel 5
The installation state and the number are not limited to those described above, and may be any as long as they are provided on any one of the outer surfaces of the walls 4a to 4e of the oven storage 4.

The oven box 4 is made up of the outer box 1 by two substantially L-shaped right support pieces 9a and two left support pieces 9b.
It is fixed within 0. An interval of ΔL3 is provided between the oven housing right side wall 4a and the inner surface of the outer box right side wall 10a, and an interval of ΔL1 is provided between the oven housing left side wall 4d and the inner surface of the outer box left side wall 10d. Is provided between the oven cabinet ceiling wall 4b and the inner surface of the outer box ceiling wall 10b.
Is provided between the oven bottom wall 4c and the outer box bottom wall 10c.
An interval of ΔL4 is provided between the inner surface of the inner case c and the inner surface of the oven case rear wall 4e and the inner surface of the outer case rear wall 10e.

The two right support pieces 9a are attached to the outer box bottom wall 10c.
Is welded to the outer surface of the oven cabinet right side wall 4a, and a surface parallel to the outer case bottom wall 10c is welded to the inner surface of the outer case bottom wall 10c. The two left support pieces 9b have a surface perpendicular to the outer case bottom wall 10c welded to the outer surface of the oven cabinet left side wall 4d, and a surface parallel to the outer case bottom wall 10c has an outer case bottom wall 10c.
Welded to the inner surface.

Each engagement piece 6a-6j and each support piece 9a,
Although the shape and number of 9b are not limited to those described above, the smaller the contact area with the outer box 10, the oven storage 4, and the heat insulating panel 5 and the smaller the thickness thereof, the more each engaging piece 6
A small amount of heat is transmitted to the outside of the oven storage 4 through a to 6j and the supporting pieces 9a and 9b.

FIG. 3 is a sectional view of the heat insulating panel 5. The heat insulating panel 5 includes the cover film 11 and the cover film 1.
1 and a reinforcing member 12 housed in the housing 1. In the heat insulating panel 5, the region 14 in the cover film 11 where the reinforcing member 12 is accommodated is kept in a degassed state.

The cover film 11 is made of a metal thin film having heat resistance and flexibility, such as a stainless steel plate. Since the thin film constituting the cover film 11 is selected to be as thin as possible, the amount of heat conducted inside the cover film 11 is small. Also, the cover film 11
Since the peripheral portion 13 is sealed by seam welding, it is possible to prevent outside air from entering the region 14 in which the reinforcing member 12 is accommodated from the peripheral portion 13. Further, since the cover film 11 is made of a metal material, outside air does not pass through the cover film 11. Therefore, the region 14 in the cover film 11 in which the reinforcing member 12 is accommodated has high airtightness.

Next, an example of a method for manufacturing the heat insulating panel 5 will be briefly described. First, two flexible metal thin films are prepared, and the peripheral portions 13 of the two thin films are joined by seam welding, leaving an opening for inserting the reinforcing member 12. Thereafter, the reinforcing member 12 is inserted through the opening, and the opening is sealed by seam welding under a vacuum pressure of about 0.1 to 0.5 Torr, which can be industrially easily realized. In the heat insulating panel 5 thus formed, the region 14 in which the reinforcing member 12 is accommodated is kept in a degassed state at a vacuum pressure of about 0.1 to 0.5 Torr.

The reinforcing member 12 is a rectangular plate-like body, has heat resistance and rigidity, and is made of an inorganic material such as calcium silicate having a low thermal conductivity. In the heat insulating panel 5, since the reinforcing member 12 having rigidity is accommodated in the cover film 11 having flexibility, the inside of the cover film 11 can be kept in a degassed state even under the atmospheric pressure.
Table 1 is a table showing the density, heat resistance temperature, and thermal conductivity of each sample reinforcing member. As a sample reinforcing member of Table 1,
A mixture of silica and titania, calcium silicate and hard polyurethane are used. Table 1 shows the thermal conductivity when the sample reinforcing member is at 25 ° C. and the thermal conductivity when the sample reinforcing member is at 300 ° C.

[0045]

[Table 1]

Rigid polyurethane, which is an organic material, contains about 1
Since the sample is deformed at 00 ° C., as shown in Table 1, the sample reinforcing member made of hard polyurethane has a heat-resistant temperature of about 100 ° C., and is not suitable for the reinforcing member 12 of the cooking device 1. Table 1 also shows that the sample reinforcing member made of calcium silicate and the sample reinforcing member made of a mixture of silica and titania have excellent heat resistance and low thermal conductivity.

The material constituting the reinforcing member 12 is not limited to the above-described material containing calcium silicate as a main component, and any material having heat resistance and rigidity and low thermal conductivity may be used. The reinforcing member 12 may be made of an inorganic material such as a mixture of silica and titania shown in FIG.

In the heating and cooking apparatus 1, when the temperature in the oven storage 4 rises due to the heat generated by the heaters 2 and 3, the heat in the oven storage 4 is transmitted to the heat insulating panel 5, and the heat insulating panel 5
Is heated. Since the reinforcing member 12 has heat resistance,
Does not deform when heated. Also, the cover film 11
Has heat resistance, so that even when heated, airtightness in the cover film 11 can be ensured. Therefore, even when the heat insulating panel 5 is heated, the degassed state of the region 14 in the cover film 11 in which the reinforcing member 12 is accommodated is maintained, and the heat insulating performance does not decrease.

The reinforcing member 12 is a communicating porous body having a pore diameter of 100 μm or less. Reinforcement member 12
Is a porous body, so that it has a low bulk density and a small amount of heat conduction through it. Further, since the reinforcing member 12 is a communicating porous body, and the respective holes are connected to each other without being independent, the region 14 in which the reinforcing member 12 is accommodated is degassed, so that the reinforcing member 12 All the holes can be reliably degassed.

The average distance traveled by a gas molecule between collision with another gas molecule and the next collision is called a mean free path. Table 2 is a table showing the mean free path of gas molecules at each vacuum pressure. As shown in Table 2, the lower the pressure in the degassed space, the longer the mean free path of the gas molecules. Under a vacuum pressure of 0.1 Torr, the mean free path of the gas molecules is 500 μm.

[0051]

[Table 2]

The heat insulating panel 5 has a reinforcing member 12 having a hole diameter of 1
Since it is not more than 00 μm, even in a degassed state at a vacuum pressure of about 0.1 to 0.5 Torr, which can be industrially easily realized, the pore diameter of the reinforcing member 12 is larger than the mean free path of the gas molecules in the region 14. Is also small. Therefore, the heat insulation panel 5
Can reliably deaerate the inside of the micropores of the reinforcing member 12 by vacuum and obtain excellent heat insulating performance.

The reinforcing member 12 is made of an inorganic oxide that absorbs or reflects radiant heat, for example, zirconia (Zr).
O ₂ ) or titania (TiO ₂ ) powder. The heat transmitted by radiation increases significantly with increasing temperature. For this reason, the heat transfer in the high temperature range is
Susceptible to radiation.

FIG. 4 is a graph showing the relationship between the density and the thermal conductivity of a sample reinforcing member made of calcium silicate containing an inorganic oxide. The density of the sample reinforcing member shown in FIG. 4 increases as the content of the inorganic oxide that absorbs or reflects radiant heat increases. The inorganic oxide contained in the calcium silicate is zirconia (ZrO ₂ ) or titania (TiO ₂ ) powder. Average temperature 25
In the case of 0 ° C. and 150 ° C., the thermal conductivity of the sample reinforcing member hardly changed, but the average temperature was 35 ° C.
In the case of 0 ° C., it can be seen that the thermal conductivity of the sample reinforcing member decreases as the content of the inorganic oxide increases. That is, the reinforcing member 12 containing the inorganic oxide that absorbs or reflects radiant heat can reduce the amount of heat radiation due to radiation, and can effectively insulate heat even in a high temperature range.

Table 3 shows the temperatures of the heating and cooking apparatus 1 in which the heat insulating panels 5a to 5e are provided on the outer surface of the walls 4a to 4e of the oven storage 4 and the heating and cooking apparatus 1 in which the heat insulating panels 5 are not provided. 6 is a table showing an arrival time and power consumption for maintaining a set temperature.

[0056]

[Table 3]

The heating / cooking apparatus 1 provided with the heat insulating panel 5 and the heating / cooking apparatus without the heat insulating panel 5 shown in Table 3 are both 18L-type electric ovens having a standard size. The heat insulation panel 5 has a heat conductivity of 0.1.
02 W / m · K. As shown in Table 3, the heating and cooking device 1 provided with the heat insulating panel 5 has a higher heating efficiency than the heating cooking device without the heat insulating panel 5.
That is, by providing the heat insulating panel 5, the heating cooking device 1 can shorten the arrival time for causing the temperature in the oven storage 4 to reach the set temperature, and reduce the power consumption for maintaining the set temperature. It is possible to obtain a heat insulating effect such as that possible.

As can be seen from Table 3, especially when the set temperature is 300 ° C., the arrival time and the power consumption of the heating and cooking apparatus 1 provided with the heat insulating panel 5 are about three minutes shorter than those of the heating cooking apparatus without the heat insulating panel 5. 2 or less. This shows that the heat insulating panel 5 can effectively insulate even in a high temperature range. Cooking device 1
The outer box 1 provided around the oven storage 4 by providing the heat insulating panel 5 on the outer surface of the oven storage 4
It is possible to prevent the temperature of 0 from becoming high.

The present invention is not limited to the heating and cooking apparatus 1 described above, but can be suitably applied to, for example, an oven toaster and a microwave oven.

[0060]

As described above, in the heating cooking apparatus according to the present invention, by providing the heat insulating panel, the time for heating the object to be heated can be reduced, and the energy consumed for heating the object to be heated can be reduced. Such a high heat insulating effect can be obtained. Further, since heat is not easily applied to the outer box provided around the oven storage, the temperature of the outer box does not increase. Therefore, the cooking device according to the present invention is suitably implemented as an electric oven, an oven toaster and a microwave oven.

According to the present invention, in the heat insulating panel, since the cover film is made of a metal thin film, the amount of heat conduction due to gas molecules in the region where the reinforcing member is accommodated is small, and the amount of heat conduction transmitted inside the cover film is small. Less is. For this reason, the heat insulation panel has high heat insulation performance.

Further, according to the present invention, since the cover film is securely sealed by seam welding, the heat conduction amount of gas molecules in the region where the reinforcing member is accommodated is small, and the heat insulation panel has high heat insulation performance.

Further, according to the present invention, since the reinforcing member is made of an inorganic material having heat resistance, the heat insulating performance of the heat insulating panel does not deteriorate even if heat is applied to the reinforcing member.

Further, in the heat insulating panel according to the present invention, since the reinforcing member is a communicating porous body, and the respective holes are connected to each other without being independent, the inside of all the holes of the reinforcing member is surely evacuated. be able to.

Further, in the heat insulating panel according to the present invention, since the pore diameter of the reinforcing member, which is a communicating porous body, is 100 μm or less, even in a degassed state which can be easily realized industrially, the inside of the micropore is reliably vacuumed It can be degassed and has excellent heat insulation performance.

In the heat insulating panel according to the present invention, since the reinforcing member contains an inorganic oxide that reflects or absorbs radiant heat, heat insulation can be effectively performed even in a high temperature range.

[Brief description of the drawings]

FIG. 1 is a front view showing a schematic configuration of a heating cooking device 1 according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along line AA of FIG. 1;

FIG. 3 is a cross-sectional view of the heat insulating panel 5.

FIG. 4 is a graph showing the relationship between the density and the thermal conductivity of a sample reinforcing member made of calcium silicate containing an inorganic oxide.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Heating apparatus 2 Upper heater 3 Lower heater 4 Oven storage 5 Insulation panel 7 Tray 10 Outer box 11 Cover film 12 Reinforcement member 13 Peripheral part 14 Area

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Takashi Inoue 22-22 Nagaikecho, Abeno-ku, Osaka-shi, Osaka F-term (reference) 3L087 AA01 AC18 CB07 CC01 DA07 DA27

Claims (7)

[Claims] 1. An outer case, an oven housed in the outer case and housing an object to be heated, a heater for heating the object to be heated in the oven case, and a heat insulating panel provided on an outer surface of the oven case. In the heating cooking device comprising, the heat insulating panel has heat resistance and rigidity, a reinforcing member in which a void is formed, is hermetically covered by a flexible and heat resistant cover film, and the inside of the cover film A cooking device, wherein an area in which a reinforcing member is accommodated is kept in a degassed state. 2. The cooking device according to claim 1, wherein the cover film is made of a metal thin film. 3. The cooking device according to claim 2, wherein the cover film made of the metal thin film is sealed by seam welding. 4. The heating cooking device according to claim 1, wherein the reinforcing member is made of a heat-resistant inorganic material. 5. The cooking device according to claim 1, wherein the reinforcing member is a communicating porous body. 6. The cooking device according to claim 5, wherein the reinforcing member, which is a communicating porous body, has a hole diameter of 100 μm or less. 7. The method according to claim 1, wherein the reinforcing member contains an inorganic oxide that absorbs or reflects radiant heat.
7. The heating cooking device according to any one of 6.