JP2015052433A - Food cold storage package case and food packaging body using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a food cold storage package case capable of performing cold storage without temperature rise for a long time irrespective of kinds of food for which freezing storage or refrigeration storage is required and to provide a food packaging body using the food cold storage package case.SOLUTION: A food cold storage package case and a food packaging body using the food cold storage package case are disclosed. The food cold storage package case is a case for performing cold storage and package of at least one kind of food selected from a group comprising frozen food and refrigeration food and includes a heat-insulating box body, a cold storage agent arranged in the box body and a sheet-like heat storage agent. Therein, an internal space of the box body is separated into a first division and a second division by the sheet-like heat storage agent arranged in the horizontal direction of the box body and the first division is provided with the cold storage agent.

Description

  The present invention relates to a food cold-packing case and a food packing body using the same, and more particularly, to a food cold-packing case that can be transported in a state where food is kept cold and packed, and a food packing body using the same.

  Conventionally, in the transportation of foods and the like, it has been desired to transport the foods while keeping them cold in order to maintain the freshness and storage stability of the foods and the like. In particular, due to the increasing demand for individual delivery by consumers, foods to be kept cold and foods to be kept cold are placed in a cold-packed packaging case in which a cold storage agent or a heat storage agent is placed to suppress the temperature rise of the foods, etc. Meanwhile, transportation takes place in the meantime.

  From such a point of view, for example, a plurality of types of cold storage materials having different temperatures are arranged in a heat insulating box, and when the temperature of the outside air is higher than the cold insulation temperature, There has been proposed a cold insulation packaging case that keeps cold by being arranged outside the higher cold storage material (Patent Document 1). In addition, a cold insulation packaging case has been proposed in which a plurality of storage chambers are formed by partitioning the interior with partition walls, and a food or the like is kept in at least two different temperatures in one container using a cryogen (Patent Document) 2).

  However, it is difficult to suppress the temperature rise of the food to be packed for a long time in any of these cold-packed packaging cases, and the transportable time is extremely limited. In addition, this time restriction imposes a restriction on the actual transportation distance, and affects smooth and efficient logistics. In addition, if you use excessively refrigerated agents such as dry ice, ignoring the type of food, etc., foods that require refrigerated storage that is not suitable for frozen storage (for example, vegetables, fresh fish, meat, etc.) There was also concern about the possibility of causing freezing damage and reducing the commercial value.

JP-A-9-68376 JP-A-11-344277

  The present invention has an object to solve the above-mentioned problems, and the object of the present invention is that it can be kept cool for a long time without temperature rise regardless of the type of food that is required to be frozen or refrigerated. Another object of the present invention is to provide a cold food packaging case and a food packaging body using the same.

The present invention is a case for keeping and packing at least one food selected from the group consisting of frozen food and refrigerated food,
A heat-insulating box, and a regenerator and a sheet-like heat accumulator disposed in the box,
Here, the internal space of the box is separated into the first compartment and the second compartment by the sheet-like heat storage agent arranged in the horizontal direction of the box, and the first compartment is the cold storage It is a case with an agent.

  In one embodiment, the 1st section is arranged below the 2nd section with respect to the perpendicular direction of the box.

  In one embodiment, the first compartment is a compartment for containing the frozen food.

  In one embodiment, the second compartment is a compartment for containing the refrigerated food.

  The present invention is also a method for keeping food refrigerated, including the step of storing the food in the case.

  The present invention is also a food packaging body in which food is contained in the case.

The present invention is also a method for producing a food package,
Disposing a cold storage agent on the inner bottom surface of the heat insulating box;
Placing frozen food on the cold storage agent;
Disposing a sheet-shaped heat storage agent on the frozen food to cover the frozen food and the cold storage agent; and disposing a refrigerated food on the heat storage agent;
A method comprising

  According to the present invention, it is possible to keep cold while suppressing an increase in temperature over a long period of time, without distinguishing refrigerated food such as refrigerated food or frozen food. In particular, the cold-packing case of the present invention has a small temperature fluctuation during the cold-keeping period, so that the temperature load on the food to be kept cold can be suppressed. Furthermore, the occurrence of freezing damage can be avoided for refrigerated foods, and a more suitable freshness can be maintained. Since the refrigerated packaging case of the present invention is suitable for long-term cold storage as described above, it can be used for longer distance transportation. As a result, cold food distribution can be performed more efficiently.

It is a figure for expressing and explaining a food cold preservation case of the present invention typically, and is a sectional view of the case. It is a figure for explaining typically an example of the food packing object which stored frozen food and refrigerated food in the food cold storage packing case of the present invention, and is an exploded sectional view of the packing object concerned. It is a figure for demonstrating other examples of a food packing object which stored frozen food and refrigerated food in the food packing case of the present invention, and is an exploded sectional view of the packing object concerned. It is a figure for demonstrating another example of the food packaging body which stored the frozen food and the refrigerated food in the food packaging case of this invention, Comprising: It is an exploded sectional view of the said packaging body. It is a figure for demonstrating another example of the food packaging body which stored the frozen food and the refrigerated food in the food packaging case of this invention, Comprising: It is an exploded sectional view of the said packaging body. It is a figure for demonstrating still another example of the food packaging body which stored the frozen food and the refrigerated food in the food packaging case of this invention, Comprising: (a) Is a disassembled cross-sectional view of the packaging body showing a state in which the cold storage agent is disposed between the frozen food and the heat storage agent, and (b) is the frozen food placed above the heat storage agent in the packaging body. In the case where it arrange | positions, it is an exploded sectional view of the said package which shows the state which has arrange | positioned frozen food between a cool storage agent and a thermal storage agent. It is a graph which shows the change of the cold storage temperature of the frozen food and the refrigerated food in the cold storage box used in Example 1. It is a graph which shows the change of the cold storage temperature of the frozen food and the refrigerated food in the cold storage box used in the comparative example 1. It is a graph which shows the change of the cold storage temperature with the refrigerated food in the cold storage box used in Example 2. It is a graph which shows the change of the cold storage temperature with the refrigerated food in the cold storage box used in the comparative example 2. It is a graph which shows the change of the cold storage temperature with the refrigerated food in the cold storage box used in Example 3.

  Hereinafter, the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a diagram schematically showing and explaining a food cold-packing case of the present invention, and is a cross-sectional view of the case.

  The food cold storage case 100 is a case for storing and packing food such as frozen food and / or refrigerated food. The case 100 includes a box body 110, a cold storage agent 120 and a sheet-like heat storage agent 130 arranged in the box body 110.

  The box body 110 includes a housing portion 102 that can accommodate a cold storage agent 120, a heat storage agent 130, and the like, which will be described later, and a cover portion 104 that can cover the upper portion of the storage portion 102. Prepare. The box body 110, that is, the housing portion 102 and the cover portion 104 are made of a material having a high heat insulating property. Such a material having high heat insulation is not necessarily limited, but examples thereof include foamed resins such as polystyrene resins.

  The shape of the box 110 is not particularly limited, and is, for example, a cube or a rectangular parallelepiped having one side of 5 cm to 50 cm, preferably 20 cm to 40 cm. Although the thickness of the wall which comprises the accommodating part 102 among the box bodies 110 is also not specifically limited, In order to improve cold retention, it is preferable to have thickness of 1 cm-4 cm, for example.

  The regenerator 120 is a cooling means that can be used repeatedly by generally refrigeration before use, and is also called a cold insulator (ice pack). Examples of the regenerator 120 include a bag containing water and a superabsorbent resin (gelling agent) such as sodium polyacrylate or a thickener such as gums and inorganic salts, and a polyethylene container enclosed product, As well as combinations thereof. Melting | fusing point of the material which comprises the cool storage agent 120 is -35 degreeC-0 degreeC, for example, Preferably it is -15 degreeC--1 degreeC.

  It is preferable to use the regenerator 120 that has been frozen (pre-freeze) for a sufficient time at a temperature below the melting point (for example, −45 ° C. to −5 ° C.) in advance. By performing preliminary freezing in such a temperature range, the cold storage effect of the cold storage agent 120 can be maintained for a longer time.

  The usage rate of the regenerator 120 in the food packaging case 100 of the present invention includes the type of the regenerator 120 used, the temperature and / or time of preliminary freezing, the type and / or amount of frozen food to be kept cold, and the box 110. Although it is not necessarily limited because it fluctuates depending on the volume, etc., it is preferably 10 g to 200 g, more preferably 30 g to 150 g, with respect to 1 liter of the volume of the box 110.

The heat storage agent 130 is made of a material having a property that can block or reduce the conduction of the temperature on one surface side to the other surface side. Examples of the material constituting the heat storage agent 130 include organic compounds such as paraffin wax, saturated fatty acid having a C _{16 to} C ₁₈ carbon chain, unsaturated fatty acid having a C _{6 to} C ₁₈ carbon chain, and polyalkylene glycol. Etc. The melting point of the material constituting the heat storage agent 130 is, for example, 0 ° C. to 10 ° C., preferably 2 ° C. to 8 ° C.

  Furthermore, in the present invention, in order to increase the cold storage efficiency of frozen food and / or refrigerated food, the difference between the melting point of the cold storage agent 120 and the thermal storage agent 130 used in one food cold storage packaging case 100 is preferably May select each of the cold storage agent 120 and the thermal storage agent 130 such that the temperature is 3 ° C to 30 ° C, more preferably 5 ° C to 25 ° C.

  It is preferable to use the heat storage agent 130 that has been frozen (preliminarily frozen) over time at a temperature below the melting point (for example, −3 ° C. to 8 ° C.). By performing preliminary freezing in such a temperature range, the cold storage effect of the heat storage agent 130 is enhanced, and in particular, it can be held for a longer time without causing refrigeration of frozen food.

  The use ratio of the heat storage agent 130 in the food packaging case 100 of the present invention includes the type of the heat storage agent 130 to be used, the temperature and / or time of preliminary freezing, the type and / or amount of the refrigerated food to be kept cold, and the box 110. Although it is not necessarily limited because it fluctuates depending on the volume, etc., it is preferably 10 g to 200 g, more preferably 30 g to 150 g, with respect to 1 liter of the volume of the box 110.

  The heat storage agent 130 also has a sheet-like form, and may have a size that can substantially cover the opening area of the housing portion 102 of the box 110, for example. The thickness of the sheet is not necessarily limited, but is preferably 0.2 mm to 3 mm, more preferably 0.8 mm to 1.5 mm in order to stably and reliably block the temperature between the upper and lower surfaces of the sheet.

  In FIG. 1, the food cold-packing case 100 of the present invention is divided into a first compartment 140 and a second compartment 150 by a sheet-like heat storage agent 130 in which the internal space of the box 110 is arranged in the horizontal direction of the box 110. It is separated. That is, the first section 140 refers to a space formed by the bottom surface and part of the side surface (lower side surface) of the housing portion 102 of the box 110 and the lower surface of the sheet-like heat storage agent 130. On the other hand, the second section 150 is configured by the upper surface of the sheet-like heat storage agent 130, a part of the side surface (upper side surface) of the housing portion 102 of the box body 110, and the lower surface of the cover portion 104 of the box body 110. Point to space. The cool storage agent 120 is disposed on the inner bottom surface of the housing portion 102 of the box 110, that is, in the first compartment 140. Here, the ratio of the volume constituting the first compartment 140 and the volume constituting the second compartment 150 is not particularly limited. It varies depending on the type of food (frozen food and / or refrigerated food) to be kept cold in each compartment described below and the amount thereof, and an appropriate volume ratio between the first compartment and the second compartment can be arbitrarily set by those skilled in the art. .

  FIG. 2 is a diagram for schematically explaining an example of a food packing body in which frozen food and refrigerated food are stored in the food cold-packing case of the present invention, and is an exploded sectional view of the packing body.

  In FIG. 2, in the first compartment 140, the frozen food 160 is disposed on the cold storage agent 120 disposed on the inner bottom surface of the housing portion 102 of the box 110 in contact with the cold storage agent 120. Further, a sheet-like heat storage agent 130 is covered on the frozen food 160. As described above, the first section in FIG. 2 functions as a space for keeping the frozen food cold.

  Here, examples of frozen foods that can be kept cold in the present invention include, but are not necessarily limited to, unheated ingested foods and post-heated ingested foods. Examples of frozen foods that belong to non-heated foods include raw foods such as seafood sashimi and peeled products; and boiled octopus, boiled crabs, frozen cakes, boiled scallops, boiled vegetables, etc. Food; Examples of frozen foods that are ingested after heating include croquettes, fries, frozen pizzas, frozen udon noodles, buckwheat, ramen, and other semi-cooked foods; Cooked foods.

  In the present invention, in the first section 140, for example, for the purpose of maintaining a certain amount of the cold-retaining effect in the section while reducing the cost by reducing the amount of the refrigerating regenerator that is generally expensive. A refrigerating regenerator (not shown) may be separately arranged. Here, the term “cool storage agent for refrigeration” used in the present specification refers to a cool storage agent used for keeping the frozen food in the first section (for the purpose of distinguishing from the above-mentioned refrigeration storage agent for freezing. It is a cold-retaining material different from (also referred to as a cold storage agent for foods), for example, a material having a melting point of -9 ° C to 0 ° C, preferably -5 ° C to -1 ° C. Such a refrigerating agent for refrigeration is commercially available, for example, from N-Tech Co., Ltd. under the trade name HIMURO K type (melting point-1 ° C. type).

  Further, in FIG. 2, refrigerated food 180 is arranged in the second compartment 150 on the sheet-like heat storage agent 130 covered on the frozen food 160 to constitute the first compartment 140. Yes. And the 2nd division 150 is comprised by closing the opening part of the accommodating part 102 with the cover part 104. FIG. In this way, the second section in FIG. 2 functions as a space for keeping the refrigerated food cold.

  Here, examples of the refrigerated food that can be kept cold in the present invention are not necessarily limited, but dairy products such as yogurt, butter, margarine, milk, milk beverage, soy milk beverage, lactic acid bacteria beverage, fresh cream, whipped, coffee fresh; Desserts such as pudding, jelly, agar, cake, pie, and tart; beverage products such as fruit drinks, vegetable drinks, soft drinks, mineral water, tea, coffee; fresh foods such as raw vegetables, raw meat, and raw fish; Fruits such as apples, strawberries, melons; kneaded products such as konjac, chikuwa, hanpen; raw noodles such as ramen, udon, soba, fried noodles; boiled noodle products; beans products such as natto, tofu, fried chicken And other side dishes such as meatballs and boiled foods.

  In FIG. 2, the cold storage agent 120, the frozen food 160, the heat storage agent 130, and the refrigerated food 180 are arranged in this order from the bottom to the top, and only the frozen food 160 is kept cold in the first section 140, and the refrigerated food in the second section. Only 180 is kept cold. In the first section 140, the frozen food 160 comes into contact with the cold storage agent 120, while the outside of the first section 140 is appropriately blocked by the housing portion 102 and the sheet-like heat storage agent 130, so that the cold air escapes to the outside. It is difficult to cool the frozen food 160 more efficiently. On the other hand, in the second section 150, since the refrigerated food 180 is not in contact with the cold storage agent 160, it is possible to prevent quality deterioration due to a refrigeration failure, and from the cold storage agent 120, the frozen food 160, or the first section 140. By transmitting cold air, the refrigerated food 180 can be effectively kept cold.

  In the present invention, the second compartment 150 is provided with a refrigerating regenerator (not shown) on the sheet-like heat regenerator 130 for the purpose of maintaining the cooling effect of the refrigerated food 180 for a longer time. It may be arranged separately. The refrigerating agent for refrigerating that can be arranged in the second compartment 150 is the same as the refrigerating agent for refrigerating that can be arranged in the first compartment 140. The refrigerating agent for refrigeration may be disposed in contact with the refrigerated food 180 as long as it does not adversely affect the refrigerated food 180 accommodated in the second compartment 150.

  After the frozen food 160 and the refrigerated food 180 are arranged as described above, the food cold storage packaging case is covered with a cover and preferably sealed. The case packed in this way is delivered to the consumer as a food package 200 by, for example, an ordinary distribution route for individual delivery.

  In FIG. 2, the frozen food 160 and the refrigerated food 180 are arranged in the food package 200, but the present invention is not necessarily limited to such a configuration. In other words, either the frozen food 160 or the refrigerated food 180 may not be included. Further, in FIG. 2, the upper part of the refrigerated food 180 may be covered with a member having a known heat insulating property (for example, a heat insulating material or a heat insulating sheet) (not shown). By further covering such a heat-insulating member, the cold insulation in the food cold-packing case 100 is further improved.

  FIG. 3 is a diagram for schematically explaining another example of a food packaging body in which frozen food and refrigerated food are stored in the food packaging case of the present invention, and is an exploded sectional view of the packaging body.

  In the food packaging body 300 shown in FIG. 3, the frozen food 160 is arranged in contact with the inner bottom surface of the storage unit 102 of the box 110 in the first section 140, and the side surface of the frozen food 160, that is, the storage unit 102. A plurality of cool storage agents 122 and 124 are disposed along the inner surface of the sheet, and a sheet-like heat storage agent 130 is covered so as to cover the frozen food 160 and the cool storage agents 122 and 124. In the second compartment 150, the refrigerated food 180 is arranged as it is on the sheet-like heat storage agent 130, as in the food package 200 shown in FIG.

  In FIG. 3, the frozen food 160 and the refrigerated food 180 are arranged in the food package 300, but the present invention is not necessarily limited to such a configuration. That is, the refrigerated food 180 may not be included in the second compartment 150 in FIG.

  FIG. 4 is a diagram for schematically explaining another example of a food packaging body in which frozen food and refrigerated food are stored in the food packaging case of the present invention, and is an exploded sectional view of the packaging body.

  In the food packaging body 400 shown in FIG. 4, in the first section 140, the cold storage agent 120 is disposed in contact with the inner bottom surface of the housing portion 102 of the box 110, and the frozen food 160 is placed on the cold storage agent 120. On the other hand, a plurality of cool storage agents 122 and 124 are also disposed on the side surface of the frozen food 160, that is, the inner surface of the container 102, and the sheet-like heat storage agent is covered so as to cover the frozen food 160 and the cool storage agents 122 and 124. 130 is covered. In the second compartment 150, the refrigerated food 180 is arranged as it is on the sheet-like heat storage agent 130, as in the food package 200 shown in FIG.

  In FIG. 4, the frozen food 160 and the refrigerated food 180 are arranged in the food package 400, but the present invention is not necessarily limited to such a configuration. That is, the refrigerated food 180 may not be included in the second compartment 150 in FIG.

  FIG. 5 is a diagram for schematically explaining still another example of a food packaging body in which frozen food and refrigerated food are stored in the food packaging case of the present invention, and is an exploded sectional view of the packaging body.

  In the food package 500 shown in FIG. 5, in the first section 140, the plurality of frozen foods 162 and 164 are in contact with the inner bottom surface of the housing portion 102 of the box 110, and the frozen foods are arranged at intervals. A plurality of cool storage agents 122, 124, 126 are arranged on the respective side surfaces of the frozen foods 162, 164, and a sheet-like heat storage agent 130 is provided so as to cover the frozen foods 162, 164 and the cool storage agents 122, 124, 126. It is covered. In the second compartment 150, the refrigerated food 180 is arranged as it is on the sheet-like heat storage agent 130, as in the food package 200 shown in FIG.

  In FIG. 5, the frozen food products 162 and 164 and the refrigerated food product 180 are arranged in the food package 500, but the present invention is not necessarily limited to such a configuration. That is, the refrigerated food 180 may not be included in the second compartment 150 in FIG.

  In the food packaging body of the present invention, in FIGS. 2 to 5, the frozen food is disposed below (the first section) of the food packaging case of the present invention, and the refrigerated food is disposed above (the second section) via a heat storage agent. Although the example which arrange | positions is shown, the arrangement | positioning in this invention is not necessarily limited to this.

  FIG. 6 is a diagram for schematically explaining still another example of a food packaging body in which frozen food and refrigerated food are stored in the food packaging case of the present invention.

  As shown to (a) of FIG. 6, in the 1st division 140, the refrigerated food 180,182 accommodated in the strong frame 190 is arrange | positioned on the internal bottom face of the accommodating part 102, and the thermal storage agent 130 on it. Is covered. On the other hand, in the second section 150, the cold storage agent 120 is disposed on the heat storage agent 130, and the frozen food 160 is further disposed on the cold storage agent 120. Thus, by providing the sturdy frame 190 in the first compartment 140, even if it is a soft refrigerated food, the refrigeration on the first compartment 140 side without being crushed by frozen food or a cold storage agent. Food 180, 182 can be placed.

  Alternatively, as shown in FIG. 6B, as in FIG. 6A, in the first section 140, the refrigerated foods 180 and 182 housed in the sturdy frame 190 are the inner bottom surface of the housing portion 102. In the second compartment 150, the frozen food 160 is placed on the heat storage agent 130, and the cold storage agent 120 is placed on the frozen food 160. May be. Even in this case, by providing a sturdy frame 190 in the first compartment 140, even if it is a soft refrigerated food, the first compartment 140 side is not crushed by frozen food or a cold storage agent. Refrigerated food 180, 182 can be placed.

  In FIGS. 6A and 6B, frozen food 160 and refrigerated food 180 and 182 are arranged in the food packaging bodies 600 and 600 ′, respectively, but the present invention does not necessarily have such a configuration. It is not limited to only. That is, the frozen food 160 or the refrigerated food 180 or 182 may not be included.

  In this way, it is possible to obtain a food package that can be kept cold for a long period of time while suppressing an increase in temperature, regardless of whether the food is refrigerated or frozen.

  EXAMPLES Hereinafter, although an Example demonstrates this invention more concretely, this invention is not limited by these Examples.

Example 1
Refrigerant for freezing (HIMURO N type (melting point -15 ° C. type, 300 g, Co., Ltd.), which was completely frozen at -25 ° C. for 12 hours in advance on the inner bottom surface of a Styrofoam cold storage box (internal volume of about 7.8 L) Frozen food (450g frozen fried rice (packed in polyethylene bag)) that had been frozen for 12 hours at -25 ° C was placed on top of the two. A temperature sensor was installed.

  Furthermore, a sheet-shaped heat storage agent (one OMURO (melting point: 5 ° C. type: 500 g), which has been completely solidified at 0 ° C. for 5 hours) is placed on the fried rice, and on top of that, One HIMURO K type (melting point-1 ° C type, 300 g, manufactured by N-Tech Co., Ltd.) as a cold storage agent for refrigeration and 130 g of refrigerated food (cut vegetables (cabbage)) previously cooled at 5 ° C for 12 hours (in a polyethylene bag) )) Was placed, a temperature sensor was installed at the center of the cut vegetables, and the cover was covered with a cold box and sealed.

  This cold storage box was placed in a thermostat kept at 35 ° C., and the transition of temperature was observed by temperature sensors attached to each of the frozen food and the refrigerated food. The obtained results are shown in FIG.

  As shown in FIG. 7, after the start of cold preservation (0:00), the frozen food is kept below freezing point (0 ° C. or lower) for a long time, and about 15 until it reaches 0 ° C., which is one measure of frozen cold preservation. It can be seen that the time below the freezing point can be maintained for a time (15:00). On the other hand, refrigerated foods are kept at a good refrigeration temperature (for example, 0 ° C. or more and 10 ° C. or less) for a long time without large temperature fluctuations, and until the temperature reaches 10 ° C., which is one measure of refrigeration. It can be seen that the state could be maintained for 14 hours (14:00). Accordingly, it can be seen that both the frozen and refrigerated storage can function well for about 15 hours even in a state where the outside air temperature is 35 ° C.

  Furthermore, the appearances of the cut vegetables used as refrigerated foods in this example immediately before being kept cold (0:00) and after being kept cold (after 23 hours (23:00)) were comparatively observed. The cabbage before the cold insulation had a white and clear appearance, and this appearance was the same after the cold preservation. In the cabbage after the cold insulation, no freezing failure after the cold insulation could be confirmed, and only water droplets that were generated once the temperature was lowered below 5 ° C. were observed. Further, there was no particular change in the texture before and after the cold insulation, and it was confirmed that the texture rich in fiber was retained after the cold preservation as well as before the start of the cold preservation.

(Comparative Example 1)
Instead of the sheet-like heat storage agent used in Example 1, a polyethylene heat insulating sheet (size: 29 cm × 22 cm, thickness: 3.0 mm) was used. A food and a refrigerated food were put in each, and the transition of the temperature with a temperature sensor after sealing was observed, and the obtained result is shown in FIG.

  As shown in FIG. 8, after the start of cold preservation (0:00), the frozen food has been kept below freezing point (below 0 ° C.) for a while, but until it reaches 0 ° C., which is one measure of frozen cold preservation. It can be seen that the temperature below freezing point is maintained for about 10 hours (10:00), which is about 5 hours shorter than the result of Example 1. On the other hand, refrigerated foods were able to maintain a good refrigeration temperature (for example, 0 ° C. or higher and 10 ° C. or lower) immediately after the start of cold storage, but about 10 until reaching 10 ° C., which is one measure of refrigerated cold storage. It can be seen that only the time (10:00) can hold the state, which is about 4 hours shorter than the result of Example 1.

  Thus, by using the heat storage agent as in Example 1 together with the cold storage agent instead of the heat insulating sheet as in Comparative Example 1, not only the cold storage time of the refrigerated food but also the cold storage time of the frozen food. It can be seen that it can be extended significantly.

(Example 2)
The number of HIMURO N type (melting point-15 ° C type, 300g, manufactured by NTEC Co., Ltd.) was changed from two to one as a refrigerating regenerator and HIMURO K type (melting point-1 ° C type) , 300 g, manufactured by NTEC Co., Ltd.) in the same compartment as the refrigerating regenerator, except that the frozen food used in Example 1 was not kept in the cold box, but only the refrigerated food was kept cold, In the same manner as in Example 1, the temperature transition by the temperature sensor after sealing was observed. In addition, by this, one side of the sheet-like heat storage agent was in a state in which a part of the cold storage agent was in direct contact. The obtained results are shown in FIG.

  As shown in FIG. 9, after the start of cold storage (0:00), the refrigerated food has no particularly large temperature fluctuation and maintains a good refrigerated temperature (for example, 0 ° C. or higher and 10 ° C. or lower) for a long time. It can be seen that the state could be maintained for about 4 hours and 30 minutes (4:30) until reaching 10 ° C., which is one measure of cooling.

(Comparative Example 2)
As a cold storage agent, the number of HIMURO N type (melting point -15 ° C type, 300 g, manufactured by NTEC Co., Ltd.) was changed from two to one, and as a cold storage agent for refrigeration, HIMURO K type (melting point -1 ° C type, 300 g) , Manufactured by NTEC Co., Ltd.) in the same compartment as the refrigerating regenerator, instead of the sheet-like heat regenerator used in Example 1, a polyethylene heat insulating sheet (size: 29 cm × 22 cm, thickness) : 3.0 mm), and the frozen food used in Example 1 was not put in the cold box, but only the refrigerated food was kept cold. The transition was observed. In addition, by this, one side of the sheet-like heat storage agent was in a state in which a part of the cold storage agent was in direct contact. The obtained result is shown in FIG.

  As shown in FIG. 10, after the start of cold storage (0:00), the refrigerated food has a refrigeration temperature of more than 5 ° C. immediately after the start of cold storage, and reaches about 10 ° C., which is one measure of refrigerated cold storage, for about one hour 30 Only the minute (1:30) can hold the state, and it can be seen that the cooling time is remarkably reduced as compared with the result of Example 2.

(Example 3)
As a cold storage agent, the number of HIMURO N type (melting point -15 ° C type, 300 g, manufactured by NTEC Co., Ltd.) was changed from two to one, and as a cold storage agent for refrigeration, HIMURO K type (melting point -1 ° C type, 300 g) , Manufactured by NTEC Co., Ltd.) is placed in the same compartment as the refrigerating regenerator, and the frozen food used in Example 1 is not placed in the cold box, but only the refrigerated food is put in the cold box and covered. According to the temperature sensor after sealing in the same manner as in Example 2 except that a polyethylene heat insulating material (size: 31 cm × 22 cm, thickness: 20 mm) was previously placed on the refrigerated food, sealed, and kept cold. The change in temperature was observed. In addition, by this, one side of the sheet-like heat storage agent was in a state in which a part of the cold storage agent was in direct contact. The obtained results are shown in FIG.

  As shown in FIG. 11, after the start of cold storage (0:00), the refrigerated food has no particularly large temperature fluctuation and maintains a good refrigerated temperature (for example, 0 ° C. or higher and 10 ° C. or lower) for a long time. It can be seen that the state could be maintained for about 12 hours (12:00) until the temperature reached 10 ° C., which is one measure of cooling.

  According to the present invention, it is possible to keep cold without increasing the temperature for a long time regardless of the type of food that is required to be stored frozen or refrigerated. The food cold storage packaging case of the present invention is useful, for example, in the fields of retail stores such as supermarkets, home delivery, and the like that individually deliver frozen foods and refrigerated foods.

DESCRIPTION OF SYMBOLS 100 Food cold storage packaging case 102 Storage part 104 Cover part 110 Box body 120,122,124,126 Cold storage agent 130 Thermal storage agent 140 1st division 150 2nd division 160,162,164 Frozen food 180,182 Refrigerated food 190 Frame body 200 , 300,400,500,600,600 'Food packaging

Claims (7)

A case for keeping and packing at least one food selected from the group consisting of frozen food and refrigerated food,
A heat-insulating box, and a regenerator and a sheet-like heat accumulator disposed in the box,
Here, the internal space of the box is separated into the first compartment and the second compartment by the sheet-like heat storage agent arranged in the horizontal direction of the box, and the first compartment is the cold storage Case with agent.   The case according to claim 1, wherein the first section is disposed below the second section with respect to the vertical direction of the box.   The case of Claim 1 or 2 whose said 1st division is a division for accommodating the said frozen food.   The case in any one of Claim 1 to 3 whose said 2nd division is a division for accommodating the said refrigerated foodstuff. A method for keeping food cold,
A method comprising the step of containing a food in the case according to claim 1.   A food package comprising a food in the case according to claim 1. A method for producing a food package,
Disposing a cold storage agent on the inner bottom surface of the heat insulating box;
Placing frozen food on the cold storage agent;
Disposing a sheet-shaped heat storage agent on the frozen food to cover the frozen food and the cold storage agent; and disposing a refrigerated food on the heat storage agent;
Including the method.

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