JPH09452A - Food with steam heating device - Google Patents

Abstract

PURPOSE: To evenly spread steam all over the entire food and to suitably perform heating. CONSTITUTION: While a main food 3 and a sub food 4 are taken out from a bag and put in a food container 5, when a user simultaneously cleaves a heat generating material bag 22 and a water bag 23 by pulling a string 24 from the outside of a box 1 and starts heat generating reaction, generated steam rises through a sheet member 25 and heats the main food 3 and the sub food 4 inside the food container 5. At this time, since the bottom wall of the food container 5 is formed by a steam transmission sheet provided with moisture permeability, the steam rises from the entire bottom wall of the food container 5 and thus, the steam is evenly spread all over the entire main food 3 and sub food 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a food provided with a steam heating device, which heats food with generated steam.

[0002]

2. Description of the Related Art In recent years, a steam heating device for generating steam by heat generation due to an exothermic reaction caused by contact between a heating agent such as quick lime and water has been used for heating foods.
Various foods with a steam heating device have been put into practical use.

A conventional food with a steam heating device is shown in FIG.
As shown in (a), on the bottom of the box 35 is placed a steam heating device 31 consisting of a heat-generating agent bag in which a heat-generating agent is enclosed and a water bag in which water is enclosed. A container 32, a main food 33 such as rice sealed in a bag, and a side food 34 such as curry or beef bowl sealed in a bag are stored. Then, when heating the food, as shown in FIG. 9B, the main food 33 and the auxiliary food 34 are taken out from the bag and placed in the container 32, and the heat-generating agent bag and the water bag are simultaneously opened. It is designed to start an exothermic reaction.

By the way, the conventional container 32 used for food with a steam heating device has a large number of relatively small holes formed in the bottom wall as shown in FIG.
As shown in (b), a bottom wall or a side surface having a required number of relatively large holes was used. Then, when the water vapor passes through the holes thus formed, the food such as the main food 33 and the side food 34 is well heated.

[0005]

However, in the container 32 in which the holes are formed as in the above-mentioned conventional example, the passage of the steam generated in the steam heating device 31 is insufficient. In general, pregelatinized rice is often used as the main food 33. However, when pregelatinized rice is dehydrated after being pregelatinized, the moisture content of each rice grain may vary. In this case, since the water vapor is not sufficiently spread in the container 32 of the above-mentioned conventional example, there are many cases where the hard and hard rice grains remain after the heating is completed.

Further, in the container 32 having the holes as in the conventional example, since the liquid juice component of the food leaks from the container, the side food 34 contains a large amount of the liquid juice component such as beef bowl and oden. In the case of food, it was unsuitable to use as a container.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a food product with a steam heating device that spreads steam evenly over the entire food product and preferably heats it.

It is another object of the present invention to provide a food product with a steam heating device, which evenly heats the entire food product even when the food product contains a large amount of sap components, so that the food product can be heated appropriately.

[0009]

In order to achieve the above object, the present invention stores a steam heating device at the bottom of a box with a lid capable of sealing the inside, and places a food container thereon. In a food with a steam heating device that heats the food in the food container by filling the box with heated steam generated by the steam heating device in a state where the food is taken out from a bag or the like and placed in the food container At least the bottom wall of the food container is formed of a sheet having moisture permeability (claim 1).

The sheet is made of non-woven fabric (claim 2).

In addition, a steam heating device is housed in the bottom of a box with a lid capable of sealing the inside, a food container is placed on it, and food is taken out from a bag or the like and placed in the food container. In the food with a steam heating device, which was designed to heat the food in the food container by filling the heating steam generated in the steam heating device in the box, the food container,
At least the bottom wall is formed of a sheet having both moisture permeability and water impermeability (claim 3).

Further, the above-mentioned sheet is made of a non-woven fabric which is water-repellent processed with a water-repellent agent (claim 4).

Further, the above-mentioned sheet is made of paper which is water-repellent processed with a water-repellent agent (claim 5).

The water repellent is mainly composed of a fluororesin (claim 6).

The water repellent is mainly composed of a silicone resin (claim 7).

The box body has a box-like shape having an opening on the upper surface, and a lid-fitting groove having a U-shaped cross section, which is open upward and is formed of an inner wall surface, a bottom surface and an outer wall surface, is formed around the opening end. And a lid around which a locking portion having a cross-sectional shape corresponding to the lid fitting groove of the case body is formed, the locking portion of the lid being inside the lid fitting groove of the case body. When fitted, the case body is closed by the lid (claim 8).

[0017]

According to the first aspect of the present invention, the bottom wall of the food container is made of a sheet having moisture permeability, so that the heated steam generated by the steam heating device passes through the bottom wall of the food container and rises. As a result, the heated steam is sufficiently supplied to the food in the food container, and evenly spreads over the entire food to be suitably heated.

According to the second aspect of the present invention, the bottom wall of the food container is made of a non-woven fabric having moisture permeability, so that the same action as that of the first aspect of the invention is achieved.

According to the third aspect of the invention, the bottom wall of the food container is made of a sheet having both moisture permeability and water impermeability, so that the heated steam generated by the steam heating device is the bottom of the food container. Rises through the wall, which
The heated steam is sufficiently supplied to the food in the food container, spreads evenly over the entire food, is suitably heated, and the juice component of the food in the food container does not leak from the food container, so the water content of oden or porridge A container suitable for heating foods containing a large amount of food can be obtained.

According to the invention of claim 4, the sheet having both moisture permeability and water impermeability is made of a non-woven fabric treated with a water repellent agent. According to the invention of claim 5, The water-soluble sheet is made of paper which is water repellent with a water repellent agent, and has the same effects as the invention according to claim 3.

According to the invention of claim 6, the water repellent is mainly composed of a fluororesin, and according to the invention of claim 7, the water repellent is mainly composed of a silicone resin. It has the same operation as the invention according to claim 3.

Further, according to the invention of claim 8, the lid fitting groove having a U-shaped cross section which opens upward and is formed around the opening end of the case body corresponds to the lid fitting groove. By configuring the case body to be closed by the lid by fitting the locking portion of the lid having a cross-sectional shape inside,
The passage of heated steam that escapes from the inside of the box to the outside of the box is formed so that it descends along the inner wall surface of the lid fitting groove, moves horizontally on the bottom surface, and then rises along the outer wall surface. Leakage of the heated steam having the above property from the inside of the box to the outside of the box is suppressed, the heated steam fills the inside of the box, and the food is efficiently heated. Even if a part of the heated steam filled in the box leaks out, the heated steam rises along the outer wall surface of the lid fitting groove and goes out of the box. Does not cause damage such as heat discoloration on the surface of the table on which is placed.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 (a) is an internal structural view showing the contents of a food product with a steam heating device according to a first embodiment of the present invention, (b).
FIG. 3 is a perspective view showing the appearance of the same embodiment. 2A and 2B are views showing a food container used in the first embodiment, wherein FIG. 2A is a perspective view showing an unused state, FIG. 2B is a perspective view showing a state in which a lid is opened, and FIG. 6 is a sectional view taken along line CC of FIG. FIG. 3 is a view showing a case main body of the box of the embodiment, (a) is a plan view,
(B) is BB sectional drawing of (a). 4A and 4B are views showing the lid of the box of the embodiment, where FIG. 4A is a plan view and FIG. 4B is FIG.
FIG. FIG. 5 is an internal configuration diagram showing a state when food is heated in the first embodiment.

The food with steam heating device comprises a steam heating device 2 placed on the bottom of a box 1, and a food container 5 containing a main food 3 and a side food 4 placed thereon. is there.

The box 1 includes a case body 11 and a lid 12 which are made of synthetic resin such as polypropylene or polystyrene.
It is composed of

The case body 11 includes a side wall 111 and a bottom wall 1.
12 and is formed in a box shape having an opening on the upper surface. At the upper end of the side wall 111, a flat portion 113 having a required width is horizontally bent outward, and a groove portion 114 having a U-shaped cross section is formed at the outer side of the flat portion 113. The groove portion 114 includes an inner wall surface 114a extending downward from the flat portion 113, a bottom surface 114c having a required width, and an outer wall surface 114b extending slightly above the inner wall surface 114a.

On the upper portions of the four corners of the outer wall surface 114b of the groove 114, there are formed projections 115 projecting slightly inward over a required size. In addition, the outer wall surface 114 of the groove 114
Wide edges 116 having a slightly wider plane are formed at the upper ends of the two corners of b.

The lid 12 is composed of a side wall 121 and a top plate 122, and is formed in a box shape having an opening on the lower surface. At the lower end of the side wall 121, a flat portion 123 having a small width is formed by being bent outward, and an outer side of the flat portion 123 is
A groove 124 having substantially the same cross-sectional shape as the groove 114 is formed. The groove portion 124 has an inner wall surface 124a extending downward from the flat portion 123, a bottom surface 124c slightly narrower than the bottom surface 114c of the groove portion 114, and an inner wall surface 124.
The groove portion 11 is formed to extend slightly above a.
The outer wall surface 12 whose height is slightly lower than the outer wall surface 114b of No. 4
4b. Further, the outer wall surface 124b is formed to be slightly inclined outward.

When the case body 11 is closed with the lid 12, the corner portion is formed by the boundary between the flat portion 113 and the inner wall surface 114a, and the boundary between the flat portion 123 and the inner side surface 124a. The corner portion faces and overlaps with the corner portion, and the groove portion 124 is fitted in the groove portion 114.
At this time, since the outer side surface 124b of the groove portion 124 is formed to be inclined outward, the outer wall surface 114b of the groove portion 114 is formed.
The upper end of the outer wall surface 114b is locked without being disengaged from the convex portion 115 by the outward elastic force generated when the inner wall surface 114b is pressed inward. As a result, the case body 11 is closed by the lid 12.

As shown in FIG. 1A, the steam heating device 2 includes, for example, a case 21 made of synthetic resin having an opening on the upper surface, a heating agent bag 22 accommodated in the case 21 in a laminated state, A water bag 23, a string 24 drawn around the both bags, and a sheet member 25 that covers the upper opening of the case 21.
It is composed of The exothermic agent bag 22 is formed of, for example, a sheet material having a laminated structure in which a resin film is stuck and laminated on an aluminum foil, and an exothermic agent 26 that reacts with water such as quick lime to generate heat is enclosed inside. Water bag 23
Is made of polyvinyl chloride, for example, and has water 27 sealed therein.

One end of the string 24 is fixed to the case 21, is drawn around the exothermic agent bag 22 and the water bag 23, and the other end is drawn from the case 21 to the outside of the box 1. The sheet member 25 is formed of, for example, a heat-resistant non-woven fabric made of aramid fiber or the like, and is welded or bonded to the peripheral portion 211 of the case 21 so that the heated steam generated in the case 21 is transmitted upward. Further, by covering the exothermic reaction part, it acts as a heat insulating sheet that prevents excessive heat from being transferred upward.

The main food 3 is a food such as cooked rice,
It is sealed in a bag made of transparent polyethylene, etc., with water removed from the pregelatinized rice to some extent, and can be eaten only by heating. The side food 4 is a food such as curry or beef bowl, which is sealed in a bag formed of aluminum foil or the like and can be eaten only by heating.

The food container 5 has a bottom wall, as shown in FIG.
It is composed of a side wall 51 and a lid 52, and is formed in a box shape, and accommodates the main food 3 and the side food 4 therein. The side wall 51 and the lid part 52 are made of polypropylene, for example, and the side wall 51 is formed at its lower end with a rib 511 of a required width having a slight wall thickness formed by bending outward, and the lid part 52 has a hole 521 formed at an appropriate position on one side. It is set up.

Then, the side wall 51 and the lid 52 are formed by cutting, for example, after the integral molding except for the eight locations indicated by A1 to A8 in FIG. 2A, and the fingers are hooked to the holes 521 of the lid 52 and pulled. Thus, the lid 52 can be easily separated from the side wall 51.

An end portion of the bottom wall of the food container 5 is welded or adhered to the rib 511, and the water vapor permeable sheet 5 is formed.
3 is formed. The water vapor permeable sheet 53 is made of a material having moisture permeability such as a heat resistant nonwoven fabric containing aramid fiber as a main component, and is permeable to water vapor.

With the above structure, as shown in FIG. 5, the main food 3 and the side food 4 are taken out from the bag, placed in the food container 5, and the case main body 11 is closed by the lid 12, so that the user can remove the outside of the box 1. When the exothermic agent bag 22 and the water bag 23 are cleaved at the same time by pulling the cord 24 to start the exothermic reaction, the generated steam rises through the sheet member 25 and the main food 3 and the sub-food in the food container 5 The food 4 is heated.

At this time, since the bottom wall of the food container 5 is formed of the water vapor permeable sheet 53, the water vapor rises from the entire bottom wall of the food container 5, and the water vapor becomes the main food 3 and the side food 4.
It will be evenly distributed throughout. After heating, the food container 5 can be eaten as it is.

As described above, in the food with the steam heating device in which the main food 3 and the auxiliary food 4 are taken out from the bag and placed in the food container 5 to start heating, the bottom wall of the food container 5 has moisture permeability. Since it is formed of the water vapor permeable sheet 53, the main food 3 and the side food 4 can be suitably heated, so that the food can be tasted deliciously.

In particular, even when the main food 3 is cooked rice in which the moisture content varies among the rice grains when the moisture is removed after the gelatinization of the rice, the rice grains with insufficient moisture content are present. Since the heated steam can be spread evenly over the rice grains, the rice can be heated to a sticky state without becoming uneven. In this way, by adding heat and moisture by the heated steam, the aged starch can be rejuvenated and the food can be tasted very deliciously.

Further, when the case body 11 is closed by the lid 12, the corner formed by the boundary between the flat portion 113 and the inner wall surface 114a and the corner formed by the boundary between the flat portion 123 and the inner side surface 124a. Since the groove portion 124 is fitted in the groove portion 114 while the portions overlap with each other, the water vapor passage that escapes from the inside of the box 1 to the outside of the box 1 is a gap between the inner wall surfaces 114a and 124a of the fitted groove portions 114 and 124. And once descend. Therefore, since the heated steam generated in the box 1 has a property of rising, leakage of the heated steam to the outside of the box 1 can be suppressed.

Further, for example, the structure of a general lid in which the case body side is wrapped to cover the lid from above, that is, in the above embodiment, the case body 11 and the lid 12 are turned upside down. In such a case, the heated steam leaks downward, which may damage the table such as discoloring the surface of the table on which the present simple food heater is placed by heat. However, according to the above-described embodiment, the water vapor passage that escapes from the inside of the box 1 to the outside of the box 1 once descends in the gap between the inner wall surfaces 114a and 124a of the fitted groove portions 114 and 124, and the bottom surface 114.
After moving horizontally between c and 124c, the outer wall surfaces 114b and 1
It rises in the gap between 24b and goes out of the box 1. Therefore, even if a part of the heated steam leaks from the box 1, the heated steam leaks upward, and it is possible to reliably prevent a situation where the heat damages the table.

In this embodiment, the water vapor permeable sheet 5 is used.
Although 3 is a heat-resistant non-woven fabric containing aramid fiber as a main component, the present invention is not limited to this, and the same effect can be obtained as long as it is formed of a material having similar moisture permeability such as other non-woven fabrics. .

Further, the water vapor permeable sheet 53 is sufficient for a food having a small amount of juice components such as cooked rice, bean rice, seasoned rice and the like, as long as it has a function of transmitting water vapor. Alternatively, two non-woven fabrics may be used, but if three or more non-woven fabrics are formed to be stacked, the permeation of the liquid can be suppressed, so that the side food 4 can be prevented from leaking from the food container 5 to some extent. As the sub-food 4, a food containing some liquid ingredients such as curry, hayashi rice and spaghetti meat sauce can be used. Therefore, various foods can be simply and deliciously tasted.

In the above embodiment, the food container 5 has the lid 5
2, but with the lid 52 removed, that is, the side wall 51 and the water vapor permeable sheet 5
It may have a bottom wall made of 3 and an opening on the upper surface.

FIG. 6 is a view showing a food container used in the second embodiment of the food product with a steam heating device according to the present invention.
(A) is a perspective view showing an unused state, (b) is a perspective view showing a state in which a lid is opened, (c) is a sectional view taken along line CC of (b).

In the second embodiment, the food container 5 has a bottom wall formed of a watertight sheet 54, as shown in FIG.
Since the other structure is the same as that of the first embodiment, the description thereof will be omitted.

The water-tight sheet 54 is made of, for example, a non-woven fabric containing aramid fibers as a main component, which is water-repellent with a water-repellent agent, has both moisture permeability and water impermeability, and is permeable to water vapor and liquid. Is to suppress.

Water-repellent treatment of a non-woven fabric by a water-repellent agent is carried out by immersing each fiber in the liquid of the water-repellent agent to form a non-woven fabric, or by forming the non-woven fabric in the liquid of the water-repellent agent. It is carried out by using a dip coating method of dipping and coating. Further, the water repellent may be applied to the surface of the nonwoven fabric or sprayed.

Further, the water-tight sheet 54 may be made of a paper such as glassine paper which is coated with a water-repellent agent so as to be water-repellent.

The water repellent agent is, for example, a fluororesin, a fluororesin containing a fluororesin as a main component and an additive such as propylene glycol, etc., a silicone resin, a silicone resin as a main component, and other additives. And a silicone oil. The water repellent agent is not limited to these, and may be any agent that imparts moisture permeability and water impermeability to non-woven fabric or paper by performing water repellent treatment such as coating.

Further, as the glassine paper which has been made water repellent with a silicone resin, there is, for example, "Reed Hot Cooking Sheet" (registered trademark) manufactured by Honshu Paper Co., Ltd. and sold by Lion Corporation. The watertight sheet 54 may be formed by using it.

With the above construction, when the exothermic reaction is started in the same manner as in the first embodiment, the generated steam rises to heat the main food 3 and the side food 4 in the food container 5. At that time, since the bottom wall of the food container 5 is formed of the watertight sheet 54 having both moisture permeability and water blocking property, the water vapor rises from the entire bottom wall of the food container 5, and the water vapor becomes the main food 3 and the sub food. While the food 4 is evenly distributed over the entire food 4, the juice component of the by-product 4 is prevented from leaking from the bottom wall of the food container 5.

As described above, in the food with the steam heating device in which the main food 3 and the side food 4 are taken out of the bag and transferred to the food container 5 to start heating, the bottom wall of the food container 5 is permeable and shielded. Since the water-tight sheet 54 that also has the water-based property is used, the main food 3 and the side food 4 are preferably heated, and as the side food 4, not only foods such as cooked rice that do not contain much liquid ingredients, but also curry, hayashi rice, Foods such as spaghetti meat sauce containing a little amount of juice components and foods containing a large amount of juice components such as beef bowl and oden can be used. Therefore, various foods can be simply and deliciously tasted.

Even when the main food 3 is cooked rice in which rice grains with insufficient water content are present, since heating steam can be uniformly supplied to each rice grain as in the first embodiment, it can be heated to a sticky state. .

The bottom wall of the food container 5 is shown in FIG.
As shown in (b), the same effect can be obtained by stacking the water vapor permeable sheet 53 and the watertight sheet 54.

Further, the food container 5 is, as shown in FIG.
The same effect can be obtained even if the bottom wall and the side wall are formed of the watertight sheet 54 and have a box shape having an opening on the upper surface.

In each of the above-mentioned embodiments, the case 21 of the steam heating device 2 and the food container 5 are formed to have substantially the same size, and the peripheral portion 211 of the case 21 and the rib 511 of the food container 5 are fixed to each other. You may do it. If the food container 5 and the steam heating device 2 are misaligned with each other, the heated steam generated in the steam heating device 2 may not be sufficiently transmitted to the food in the food container 5. Since it is possible to prevent the positional deviation from the steam heating device 2, it is possible to reliably heat the food.

[0058]

As described above, according to the first and second aspects of the present invention, since at least the bottom wall of the food container is formed of a sheet having moisture permeability, the heated steam generated by the steam heating device is used. Can permeate through the bottom wall of the food container and rise, and the heated steam can be evenly distributed throughout the food. In particular, even when the food is cooked rice in which there are rice grains with insufficient moisture content, steam can be uniformly supplied to each rice grain, so that the rice can be heated to a sticky state. Therefore,
You can enjoy food easily and deliciously.

Further, according to the inventions of claims 3 to 7, since at least the bottom wall of the food container is formed of a sheet having both moisture permeability and water impermeability, the heating steam generated by the steam heating device is: Penetrates the bottom wall of the food container and rises,
The heated steam can be evenly distributed throughout the food, and the juice component of the food can be prevented from leaking from the food container. Therefore, it is possible to easily and deliciously taste not only foods that do not contain much sap components, but also various foods that contain a large amount of sap components.

According to the eighth aspect of the present invention, the lid fitting groove having a U-shaped cross section which is formed around the opening end of the case body and opens upward, has a cross section corresponding to the lid fitting groove. By configuring the locking part of the lid having a shape to be fitted inside and closing the case body with the lid, the passage of the heated steam that escapes from the inside of the box to the outside of the box is along the inner wall surface of the lid fitting groove. After that, it is formed so as to descend once, move horizontally on the bottom surface, and then rise along the outer wall surface, so it is possible to suppress the leakage of heated steam generated inside the box to the outside of the box, and to improve food efficiency. It can be heated well. Even if a part of the heated steam filled in the box leaks out, the heated steam rises along the outer wall surface of the lid fitting groove and goes out of the box. It is possible to reliably prevent damage such as discoloration due to heat on the table surface on which the table is placed.

[Brief description of drawings]

FIG. 1 (a) is an internal configuration diagram showing the contents of a food product with a steam heating device according to a first embodiment of the present invention, and FIG. 1 (b) is a perspective view showing the appearance of the same embodiment.

2A and 2B are views showing a food container used in the first embodiment, wherein FIG. 2A is a perspective view showing an unused state, FIG. 2B is a perspective view showing a state in which a lid is opened, and FIG. It is CC sectional drawing of b).

FIG. 3 is a view showing a case body of the box of the embodiment, (a)
Is a plan view and (b) is a sectional view taken along line BB of (a).

4A and 4B are views showing a lid of the box of the embodiment, FIG. 4A is a plan view, and FIG. 4B is a sectional view taken along line BB of FIG.

FIG. 5 is an internal configuration diagram showing a state during food heating in the first embodiment.

6A and 6B are views showing a food container used in a second embodiment of the food with a steam heating device according to the present invention, FIG. 6A is a perspective view showing an unused state, and FIG. 6B is a state with a lid open. The perspective view shown, (c) is CC sectional drawing of (b).

7A and 7B are views showing another example of the food container used in the second embodiment, wherein FIG. 7A is a perspective view and FIG. 7B is a sectional view taken along line BB of FIG. 7A.

FIG. 8 is a perspective view showing another example of the food container used in the second embodiment.

FIG. 9A is a perspective view showing a conventional food product with a steam heating device, and FIG. 9B is an internal configuration diagram showing a state when food is heated in FIG. 9A.

10 (a) and 10 (b) are perspective views showing an example of a food container used for a conventional food product with a steam heating device.

[Explanation of symbols]

 1 Box 11 Case Main Body 114 Groove (Lid Fitting Groove) 114a Inner Wall 114b Outer Wall 114c Bottom 12 Lid 124 Groove (Lock) 124a Inner Wall 124b Outer Wall 124c Bottom 2 Steam Heater 3 Main Food 4 Side Food 5 Food Container 53 Water vapor permeable sheet 54 Watertight sheet

Claims (8)

[Claims] 1. A state in which a steam heating device is housed in the bottom of a box with a lid capable of sealing the inside, a food container is placed thereon, and food is taken out from a bag or the like and placed in the food container. In the food with a steam heating device, wherein the heating steam generated in the steam heating device is filled in the box to heat the food in the food container, the food container is at least the bottom wall, a sheet having a moisture permeability. A food product with a steam heating device, characterized in that it is formed of. 2. The food with a steam heating device according to claim 1, wherein the sheet is made of a non-woven fabric. 3. A steam heating device is housed in the bottom of a box with a lid capable of sealing the inside, a food container is placed on the device, and food is taken out from a bag or the like and placed in the food container. In a food with a steam heating device, which is designed to heat the food in the food container by filling the heating steam generated in the steam heating device into the box, the food container, at least the bottom wall, moisture permeability and water impermeability A food with a steam heating device, characterized in that it is formed of a sheet that also serves as a food. 4. The food with steam heating device according to claim 3, wherein the sheet is made of a non-woven fabric that is water repellent with a water repellent. 5. The food with a steam heating device according to claim 3, wherein the sheet is made of paper that is water repellent processed with a water repellent. 6. The food with a steam heating device according to claim 4, wherein the water repellent is mainly composed of a fluororesin. 7. The water repellent agent is mainly composed of a silicone resin.
Food with a steam heating device as described. 8. The case body, wherein the box has a box shape having an opening on an upper surface, and a lid fitting groove having an U-shaped cross section, which is open upwardly and is formed of an inner wall surface, a bottom surface and an outer wall surface, is formed around an opening end. And a lid around which a locking portion having a cross-sectional shape corresponding to the lid fitting groove of the case body is formed,
The steam heating device according to claim 1 or 3, wherein the case body is closed by the lid by fitting the locking portion of the lid into a lid fitting groove of the case body. Food.