Tray for heating food

Abstract

To provide a tray for heating a food that has a thin wall, lightweight, and high heat efficiency and less deforms when being heated.SOLUTION: A tray for heating a food has a split structure.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a tray for heating food.

Background Art

[0002] Conventionally, trays for heating food have been made of metals such as aluminum and copper with high thermal conductivity. These have a predetermined thickness to maintain strength including the heating temperature range, and the mass of the tray is heavy. Also, metals with low strength at high temperatures such as aluminum have the disadvantage that the original shape of the tray cannot be maintained due to creep deformation and cannot withstand long-term use. Furthermore, in the case of non-magnetic metals, there are problems that heating by an electromagnetic cooker is not possible, and magnetic separation cannot be performed when tray pieces are mixed into food.

[0003] Food heating trays using ferritic stainless steel or the like as a metal with high strength and magnetism at high temperatures have the problem that the tray twists during heating due to thermal segregation in the tray, so the tray cannot be made thin and lightweight, and there is a disadvantage that the application is limited to cooking with less thermal segregation during heating.

Summary of the Invention

Problems to be Solved by the Invention

[0004] The problem to be solved by the present invention is to provide a food heating tray that is thin, lightweight, has excellent thermal efficiency, and has little deformation due to heating.

[0005] When heating food using a tray formed of a high-strength corrosion-resistant stainless steel thin plate with low heat transfer rate, a temperature difference occurs between the part in contact with the food and the part not in contact with the food, and a problem occurs that the tray twists due to the thermal strain difference in the metal tray.

[0006] An object of the present invention is to provide a metal tray for heating food that suppresses deformation such as twisting that occurs during heating of a thin metal tray for heating food, and is lightweight and has excellent thermal efficiency.

Means for Solving the Problems

[0007] The present invention has been made to solve the above problems, and is a metal tray for food heating, characterized in that the thermal strain difference in the tray generated during the food heating process is dispersed by a divided structure to suppress the deformation of the tray.

[0008] Also, in order to reduce the thermal deformation of the tray, a metal tray for food processing formed of a metal having a linear expansion coefficient of 15×10 -6 / °C or less is preferable.

[0009] Also, in order to enable heating by an electromagnetic cooker and magnetic separation when the tray pieces are mixed into food, a metal tray for food processing formed of a magnetic metal is preferable.

[0010] Furthermore, it is preferably a metal tray for food heating that is formed of a ferritic stainless steel or a duplex stainless steel having a corrosion resistance index of Cr + 3.3×Mo + 30×Ni - Mn (the values of the component symbols are all mass% values of the contained components) of 17% or more, enhances the corrosion resistance, and is suitable for cooking foods containing salt.

[0011] The divided structure of the tray is composed of a hole with a width of 20% to 80% of the short side length of the tray and a length of 60% to 95% of the long side length at the center of the bottom surface of the tray, and a lid that closes the hole. In this case, the short side length and the long side length of the tray refer to the maximum lengths of the short side and the long side of the tray, respectively.

[0012] The shape of the tray does not need to be rectangular, and may be a shape with a curvature at the corners of the rectangle, or circular or elliptical. Also, the shape of the flange at the end of the tray may be an arbitrary shape considering the strength and ease of handling of the tray. Furthermore, for the handling of the tray, it may be a shape provided with a handle.

[0013] In order to reduce the weight and improve the thermal efficiency, the thickness of the metal tray for food heating is set to 1.0 mm or less.

[0014] The split structure of the tray may be provided with a fitting structure so that the tray and the lid do not come off easily.

[0015] The split structure of the tray may be provided with a juice receiving structure so that moisture and fat generated from food do not leak from the tray.

Advantages of the Invention

[0016] According to the metal tray for heating food of the present invention, deformation such as twisting of the tray during food heating can be suppressed, and normal heating can be performed.

[0017] In addition, by thinning the tray, it is possible to reduce the handling work load due to weight reduction and improve the thermal efficiency in the food heating process.

[0018] In addition, by selecting the metal forming the tray, it is possible to suppress the adverse effect on food due to rust, enable heating by an electromagnetic cooker, and perform magnetic separation when the tray pieces are mixed into food.

Brief Description of the Drawings

[0019]

Figure 1

[0020]

Figure 2

[0021]

Figure 3

Modes for Carrying Out the Invention

[0022] FIG. 1 is a plan view, a front view, and a side view of a food heating tray provided with a juice receiver according to an embodiment of the present invention. Foods are arranged on the bottom surface of the tray body 1, inserted into a heating device, and heated. Liquids such as moisture and fat generated from the foods are received by the juice receiver 4, suppressing leakage from the tray. During the food heating process, a thermal distortion difference occurs between the part in contact with the food and the part not in contact with the food. In an integral tray, there may be a problem that the tray twists. However, in this tray, the thermal distortion difference is separated by the tray body 1 and the lid 3, and the twisting of the tray can be suppressed.

[0023] FIG. 2 is a plan view, a front view, and a side view of a food heating tray having a fitting structure of the main body 1 and the lid 3 according to an embodiment of the present invention. Foods are arranged on the bottom surface of the tray body 1, inserted into a heating device, and heated. The shape of the tray bottom surface is nearly flat, with few restrictions on the arrangement of foods. During the food heating process, a thermal distortion difference occurs between the part in contact with the food and the part not in contact with the food. In an integral tray, there may be a problem that the tray twists. However, in this tray, the thermal distortion difference is separated by the tray body 1 and the lid 3, and the twisting of the tray can be suppressed.

[0024] As shown in FIGS. 1 and 2, the food heating tray of this embodiment is composed of a main body 1 and a lid 3 that closes the bottom hole 2 of the tray.

[0025] FIG. 3 is a short-side cross-sectional view and a long-side cross-sectional view of the tray showing an example of the combination of the tray body 1 and the lid 3 according to an embodiment of the present invention. The combined shape of the tray body 1 and the lid 3 may be a split structure for releasing the thermal distortion difference between the tray body 1 and the lid 3. For the purpose of easy cleaning and handling of the tray, the tray body 1 and the lid 3 may be structured to be easily separable, or the tray body 1 and the lid 3 may be a fitting structure 6 and structured to not easily come off.

[0026] The embodiment of Fig. 3(a) is a simple structure without a juice receiver 4, in which claws 5 are provided on the lid 3 and a fitting structure 6 with the main body 1 is adopted. The embodiment of Fig. 3(b) is a structure without a juice receiver 4, in which claws 5 for bending the long side of the lid 3 and fixing it to the main body are formed. The embodiment of Fig. 3(c) is a structure in which a juice receiver 4 is provided at the end of the main body 1 and the lid 3 is covered. Although unevenness occurs on the bottom surface of the tray, it is a structure capable of separating the food to be heat-treated from the moisture and fat generated from the food. The embodiment of Fig. 3(d) is a structure in which the unevenness on the bottom surface of the tray generated in the embodiment of Fig. 3(c) is eliminated by providing the juice receiver 4 at the bottom of the main body 1, and the bottom surface of the tray is made flat. The embodiment of Fig. 3(e) is obtained by providing a fitting structure 6 between the main body 1 and the lid 3 in Fig. 3(d) so that the lid 3 does not come off easily. As shown in Fig. 3, by appropriately selecting the structures of the main body 1 and the lid 3 according to the use of the tray, it is possible to suppress the leakage of liquids such as moisture and fat generated from the food from the tray, separate them from the food, and eliminate the restrictions on the arrangement of the food in the tray.

[0027] In this embodiment, the main body 1 and the lid 3 are made of a metal with a heat transfer coefficient at room temperature of less than 30 W / (m·K) and a linear expansion coefficient of 15×10 -6 / °C or less, and various methods suitable for molding such as press molding, folding plate processing, and welding can be used for the forming method.

[0028] The main body 1 and the lid 3 may be made of a magnetic metal in order to enable heating by an electromagnetic cooker and magnetic separation when tray pieces are mixed into the food.

[0029] In the case of foods containing salt, the main body 1 and the lid 3 are preferably formed of stainless steel with a pitting corrosion resistance index = Cr + 3.3×Mo + 30×Ni - Mn (the values of the component symbols are all mass% values of the contained components) of 17% or more.

[0030] The size of the holes is 20% to 80% of the short side length 8 of the tray and 60% to 95% of the long side length 7 of the tray, and it is constituted by a lid 3 that closes the bottom holes 2 so that food does not fall off from the bottom holes 2. In this case, the short side length 8 and the long side length 7 of the tray refer to the maximum lengths on the short side and the long side of the tray, respectively.

[0031] Between the bottom holes 2 and the lid 3, a juice receiver 4 structure shown in the example of FIG. 1 or a fitting structure 6 for preventing the lid 3 from falling off from the main body 1 shown in FIG. 2 may be provided.

[0032] The types and thicknesses of the metals of the main body 1 and the lid 3 do not need to be the same. The thickness of the lid 3 may be made thinner to the extent that food does not fall off, or it may be made into a mesh shape to discharge moisture and fat from the food to the outside of the tray.

Example

[0033] In the example shown in FIG. 2, a food heating tray according to the present invention with a short side length 8: 324 mm, a long side length 7: 353 mm, a hole width 9 of the bottom hole 2: 96 mm (30% × short side length 8), and a hole length 10: 285 mm (81% × long side length 7), and an integrated tray without the bottom hole 2 with a short side length: 324 mm and a long side length: 353 mm were used. When the food was heated to 180 ° C., although about 20 mm of twist occurred in the integrated tray, no twist was observed in the tray according to the present invention. The tray of this example was molded from duplex stainless steel SUS329L1 with a thickness of 0.5 mm, and the mass could be reduced by 10% compared to an aluminum tray with the same size and a thickness of 2.0 mm.

Industrial Applicability

Explanation of Reference Numerals

[0034] 1 Main body 2 Bottom hole 3 Lid 4 Juice receiver 5 Claw 6 Fitting structure 7 Long side length 8 Short side length 9 Hole width 10 Hole length

Claims

Claim 1 A metal tray for heating food, which has a divided structure. Claim 2 The metal tray for heating food according to Claim 1, which is formed of a metal having a heat transfer rate at room temperature of less than 30 W / (m·K). Claim 3 The metal for food heating tray according to claim 1, which is formed of a metal having a linear expansion coefficient of 15×10 －６ / °C or less. Claim 4 The metal tray for heating food according to Claim 1, which is formed of a ferromagnetic stainless steel or a duplex stainless steel having magnetism. Claim 5 The metal tray for heating food according to Claim 1, which is formed of a stainless steel having a pitting corrosion resistance index = Cr + 3.3×Mo + 30×Ni - Mn (the values of the component symbols are all mass% values of the contained components) of 17% or more and is suitable for cooking food ingredients containing salt. Claim 6 The metal tray for heating food according to any one of Claims 1 to 5, which is composed of a hole having a width of 20% to 80% of the short side length of the tray and a length of 60% to 95% of the long side length and a lid for closing the hole at the center of the bottom surface of the tray. Claim 7 The metal tray for heating food according to Claim 6, wherein the thickness of the metal is 1.0 mm or less. Claim 8 The metal tray for heating food according to Claim 6, which has a fitting structure so that the tray and the lid are not easily detached. Claim 9 The metal tray for heating food according to Claim 6, which has a juice receiving structure so that the liquid generated from the food does not leak from the tray.

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