JP2011051632A - Constant temperature storage container and transportation method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a container for storage and transportation while keeping the articles, which requires temperature control, at a predetermined temperature for a long time regardless of outside air temperature. <P>SOLUTION: The container includes a thermal insulating box and at least two kinds of cooling storage material and heat storage material which are disposed inside the box. The first cooling storage material or heat storage material (a) of a latent heat type in a solidification state are disposed next to the articles to be kept cool or warm. The second cooling storage material or heat storage material (b) of the latent heat type in a molten state are disposed outside the first cooling storage material or heat storage material (a). The constant temperature storage container, wherein the solidification/melting temperature of the first cooling storage material or heat storage material (a) exceeds 0°C, is capable of keeping the articles to be kept cool or warm for a long time in an arbitrary temperature range exceeding 0°C. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a container capable of storing and transporting articles requiring temperature control at a predetermined temperature for a long period of time regardless of the outside air temperature. More specifically, the present invention relates to pharmaceuticals and medical care requiring temperature control. The present invention relates to a container capable of storing and transporting various articles such as equipment, specimens, organs, chemical substances, foods, etc. at a predetermined temperature exceeding 0 ° C.

  Some medicines, specimens, foods, etc. handled in hospitals, supermarkets, etc. need to be kept cool or kept within a predetermined effective temperature range in order to maintain quality during transportation and transportation. Conventionally, as a method of keeping cold or warming articles of this kind such as pharmaceuticals, a cold storage material or a heat storage material is provided by placing a cold storage material or a heat storage material that has been solidified or melted in advance in a heat insulating container and housing the article. There is known a method of keeping cold or keeping warm by using latent heat of fusion of materials.

  In order to maintain an article to be cooled or kept warm (hereinafter sometimes referred to as “temperature controlled article”) within a predetermined temperature range for a long time, a cold storage material or a heat storage material having a large latent heat of fusion is used. It is necessary to increase the thickness of the heat insulating container. The cold storage material that has been used in the past and has a large latent heat of fusion and is inexpensive and safe is water. However, since the melting temperature of water is 0 ° C., there is a possibility that the temperature in the heat insulating container is lowered to around 0 ° C. It was. For this reason, in the case of temperature control in a temperature region exceeding 0 ° C., there are a method of disposing the object to be transported and a heat storage material mainly composed of water, and a method of blocking heat transfer with a heat insulating material. It has been taken. However, even in such a case, the temperature in the heat insulating container may be lowered to around 0 ° C. due to a change in the outside air temperature.

  Therefore, in order to keep the inside at a temperature suitable for storage at room temperature, a heat storage material having a melting point of 10 to 25 ° C. is used, and when the outside air temperature is higher than the melting point of the heat storage material, the heat storage material is frozen in advance. When the state and the outside air temperature are lower than the melting point of the heat storage material, a thermostatic box is proposed in which the heat storage material is used in a thawed state in advance (see Patent Document 1). According to this constant temperature box, temperature control in a temperature range exceeding 0 ° C. is possible, but precise temperature control cannot be performed for a long time.

  On the other hand, while storing a plurality of types of heat storage materials having different temperatures in a heat insulating box, when the external temperature is high, the heat storage material with the lower temperature is replaced with the heat storage material with the higher temperature. If the external temperature is low and the external temperature is low, the higher temperature heat storage material is placed outside the lower temperature heat storage material, so that the internal temperature is within a predetermined range according to the external temperature conditions. There has also been proposed a thermostatic box that is maintained inside (see Patent Document 2). However, precise temperature management cannot be performed over a long period of time simply by using a combination of heat storage materials having different temperatures.

JP 2001-63776 A JP-A-9-68376

  Thus, conventionally, there has been no container that can maintain and transport articles requiring temperature management at a predetermined temperature for a long time without being influenced by the outside air temperature. Particularly in the case of air transportation, a temperature management time of about 72 hours is required, but there is no constant temperature storage container that can control the temperature for a long time of 72 hours regardless of the outside air temperature.

  In order to solve the above-mentioned problems, the present invention enables precise temperature management over a long period of time by arranging two or more types of latent heat type cold storage materials or heat storage materials having different phase states. is there.

  That is, the constant temperature storage container according to the present invention is a constant temperature storage container provided with a heat insulating box and two or more kinds of cold storage materials or heat storage materials arranged inside thereof, and is an article to be kept cold or warm. The latent heat type first cool storage material or heat storage material (a) in a solidified state is disposed adjacent to the first heat storage material or heat storage material (a), and the latent heat type heat storage material (a) in a molten state is disposed outside the first cool storage material or heat storage material (a). A second cold storage material or heat storage material (b) is disposed, and the solidification / melting temperature of the first cold storage material or heat storage material (a) exceeds 0 ° C.

  Moreover, in this invention, the 3rd cool storage material or heat storage material (c) which is in a low temperature state from the said 2nd cool storage material or heat storage material (b) outside the said 2nd cool storage material or heat storage material (b). ) To form a constant temperature storage container.

  ADVANTAGE OF THE INVENTION According to this invention, the constant temperature storage container which can carry out temperature control precisely in the range of 1-30 degreeC in the container management temperature A (degreeC) can be provided.

  In the present invention, when the in-container management temperature is A (° C.), the solidification / melting temperature of the first cold storage material or heat storage material (a) and the second cold storage material or heat storage material (b) is (A-3) ° C. to (A + 3) ° C., and the solidification / melting temperature of the third cold storage material or heat storage material (c) is (A-10) ° C. to (A-5) ° C. It is preferable that

  Furthermore, the solidification / melting temperature of the first cold storage material or heat storage material (a) and the second cold storage material or heat storage material (b) is preferably 2 ° C. to 8 ° C., and the third The solidification / melting temperature of the cold storage material or the heat storage material (c) is preferably −5 to 0 ° C.

  The first cold storage material or heat storage material (a) and the second cold storage material or heat storage material (b) are insoluble in polyalkylene glycol and at least one aqueous solution of water-soluble salts, and A heat storage material composition containing polyalkylene glycol is suitable. Moreover, as said 3rd cool storage material or a heat storage material (c), the cool storage material which has water as a main component is suitable.

  In the constant temperature storage container according to the present invention as described above, an article to be kept cold or warm may be accommodated in a heat insulating inner box.

  In the article transportation method according to the present invention, in a situation where the outside air temperature of the container is lower than the in-container management temperature A, a molten state is formed outside the first heat storage material (a) of the latent heat type in the solidified state. In the constant temperature storage container in which the latent heat type second cold storage material or heat storage material (b) is disposed, the article to be kept cold or warm is stored and transported, and the outside air temperature of the container is In a situation where the temperature is higher than the in-container management temperature A, the article to be kept cold or warm is stored and transported in a constant temperature storage container in which a third cold storage material or heat storage material (c) is further arranged.

  According to the constant temperature storage container and the transport method according to the present invention as described above, it is possible to maintain, transport, and maintain articles requiring temperature management at a predetermined temperature for a long time without being influenced by the outside air temperature. it can.

It is a constant temperature storage container of 1st Embodiment of this invention, Comprising: The schematic diagram which shows the arrangement structure of the cool storage material or heat storage material of the measurement package used in Example 4. FIG. It is a constant temperature storage container of 2nd Embodiment of this invention, Comprising: The schematic diagram which shows the arrangement structure of the cool storage material or heat storage material of the measurement package used in Example 1. FIG. It is a constant temperature storage container of 1st Embodiment of this invention, Comprising: The schematic diagram which shows the arrangement structure of the cool storage material or heat storage material of the measurement package used in Example 5. FIG. The graph which shows the temperature change in the inner box 5 in Example 1. FIG. The graph which shows the temperature change in the inner box 5 in Example 2. FIG. The graph which shows the temperature change in the inner box 5 in Example 3. FIG. The graph which shows the temperature change in the inner box 5 in the comparative example 1. FIG. The graph which shows the temperature change in the inner box 5 in Example 4. FIG. The graph which shows the temperature change in the inner box 5 in Example 5. FIG. The graph which shows the temperature change in the inner box 5 in the comparative example 2. FIG.

  The constant temperature storage container according to the present invention includes a heat insulating box and two or more kinds of latent heat type regenerators or heat accumulators disposed in the box, and adjacent to an article to be kept cool or warm. As the first cold insulation material or heat insulation material to be arranged, a cold insulation material or a heat insulation material in a solidified state in which the solidification / melting temperature exceeds 0 ° C. is used. It can be maintained for a long time in any temperature range exceeding 0 ° C.

  In the present invention, the cold storage material or the heat storage material is obtained by enclosing a cold storage component or a thermal storage component in a plastic container or a film bag. In addition, the latent heat type regenerator material or regenerator material is a regenerator material or regenerator material that uses thermal energy associated with the phase transition, and the phase state of the regenerator component or the regenerator component is changed from a solidified state (solid) to a molten state (liquid ) Or the thermal energy released when the phase transition from the molten state (liquid) to the solidified state (solid) is utilized.

  In the present invention, the solidification / melting temperature of a cold storage material or a heat storage material is a temperature at which the phase state changes from a solidified state (solid) to a molten state (liquid), or from a molten state (liquid) to a solidified state (solid). For example, it is 0 ° C. in water. The solidification / melting temperature of the cold storage material or the heat storage material is, for example, by using a differential scanning calorimeter DSC (SEIKO Instruments, SEIKO6200), and enclosing 28 mg of the cold storage material component or the heat storage material component in a measurement pan, It can be measured by differential scanning calorimetry where the temperature is raised from 20 ° C. at 4 ° C./min. That is, the solidification / melting temperature of the regenerator material or regenerator material can be measured as the peak temperature value of the obtained chart (however, if there are multiple peaks, the peak temperature value indicating the maximum value at the peak height) And).

  Further, the cold storage material or heat storage material having a solidification / melting temperature exceeding 0 ° C. in the present invention means that the solidification / melting temperature of 50% by weight or more of the cold storage component or heat storage component exceeds 0 ° C. ing. Therefore, for example, normally, a regenerator material or a heat storage material containing 50% or more of water is excluded, but even if it contains 50% or more of water, an inorganic salt hydrate system (for example, sodium sulfate decahydrate), etc. Some melts contain 50% by weight or more of water, while others have a solidification / melting temperature exceeding 0 ° C.

  Moreover, although the phase state in this invention represents the state of a general solid, liquid, and gas, in this invention, in order to make a container size small, the phase state of a solid and a liquid is utilized. The phase state of the cold storage material or the heat storage material refers to a phase of 50% by weight or more. For example, the phase state of the cold storage material or the heat storage material in which 80% by weight is solid and 20% by weight is liquid is solid (solid state). is there.

  FIG. 1 shows a first embodiment of a constant temperature storage container according to the present invention. The constant temperature storage container 1A according to the first embodiment is a container suitable for a situation where the outside temperature of the container is lower than a predetermined in-container management temperature. The cold storage container 1A is a constant temperature storage container including a heat insulating box 2 composed of a box body 3 and a lid 4, and two or more kinds of cold storage materials or heat storage materials arranged in the box 2, A latent heat type first cold storage material or heat storage material (a) having a solidification / melting temperature of 0 ° C. or higher and in a solidified state is disposed adjacent to an article (or inner box 5) to be kept cold or warm. And the latent heat type 2nd cool storage material or heat storage material (b) in a molten state is arrange | positioned on the outer side.

  Moreover, what is shown in FIG. 2 is 2nd Embodiment of the constant temperature storage container which concerns on this invention. The constant temperature storage container 1B of the second embodiment is a container suitable for situations where the outside temperature of the container is higher than a predetermined in-container management temperature. The constant temperature storage container 1B of the second embodiment includes a second cold storage material in addition to the first cold storage material or heat storage material (a) and the second cold storage material or heat storage material (b). Or it arrange | positions the 3rd cool storage material or heat storage material (c) in a low temperature state rather than a heat storage material (b).

  Although the structure of the box 2 is not particularly limited, the box 2 has a box body 3 made of a heat-insulating material and having a bottom, and the box body 3 is attached with a lid 4 made of the same heat-insulating material. It is preferable that the lid 4 can make the opening of the box body 3 in a closed state and a released state. Furthermore, it can be set as the container excellent in heat insulation by providing a fitting structure in the joint surface of the box main body 3 and the cover body 4. FIG.

  The material and configuration of the box 2 are not particularly limited, but are preferably made of a material having a heat insulation property, for example, a foamed synthetic resin molded product, and in order to further increase the heat insulation property, the foamed synthetic resin is made of aluminum foil or resin. A laminate of films may also be used. As the base resin of the foamed synthetic resin, a polystyrene resin such as polystyrene, a polyolefin resin such as polyethylene or polypropylene, and the like can be used. Among these, polystyrene-based resins, particularly commonly used polystyrene, are preferably used in terms of price and strength.

  Further, the article to be kept cold or warm stored in the box 2 may be left as it is, or may be stored in the box 2 in a state of being wrapped with a synthetic resin sheet, a film or the like. Furthermore, an inner box 5 that holds an internal shape and that stores articles to be kept cold or warm may be housed in the box 2. Although not shown in the figure, the inner box 5 may also be provided with a lid so that the opening of the inner box 5 can be closed and released by this lid. Further, the lid of the inner box 5 is not particularly required when it does not affect the heat retaining or cooling function. If the inner box 5 is also heat-insulating like the outer box 2, the time during which the temperature can be controlled becomes longer, which is more preferable.

  Further, for the purpose of improving the heat insulation between each of the cold storage materials or the heat storage materials (a), (b), (c), for example, a heat insulating material such as a foamed resin plate 6 as in a constant temperature storage container 1C shown in FIG. Material may be inserted. The base resin of the foamed resin plate 6 may be the same as that of the outer box 2, and for example, a polystyrene resin is used.

  The first cold storage material or heat storage material (a) and the second cold storage material or heat storage material (b) are in the solidified state of the first cold storage material or heat storage material (a), As long as the heat storage material (b) is in a molten state and the phase states thereof are different, the respective solidification / melting temperatures may be the same or different. In the present invention, it is possible to perform temperature management for a long time by arranging two or more kinds of latent heat type cold storage materials or heat storage materials having different phase states as described above.

  In the present invention, in a situation where the outside air temperature is lower than the predetermined temperature range, as shown in FIG. 1, the first cold storage material or heat storage material (a) adjacent to the article (or inner box 5) to be kept cold or warmed. The thing in a solidified state is arrange | positioned, and the thing in a molten state is arrange | positioned as the 2nd cold storage material or heat storage material (b) arrange | positioned on the outer side of a 1st cold storage material or a heat storage material. In this case, the second cool storage material or the heat storage material (b) is first cooled by the outside air temperature, the temperature is lowered, and heat is generated to cause a phase transition from a molten state (liquid) to a solidified state (solid). By releasing energy, the first cold storage material or the heat storage material (a) can be prevented from being exposed to the low temperature outside air, and the first cold storage material or the heat storage material (a) is excessively cooled. The first cold storage material or the thermal storage material (a) can maintain the inside of the container 1A within a predetermined temperature range exceeding 0 ° C. for a long time.

  On the other hand, in the situation where the outside air temperature is higher than the predetermined temperature range, as shown in FIG. 2, the outside of the second cool storage material or heat storage material (b) is more external than the second cool storage material or heat storage material (b). By arranging the third cold storage material or the heat storage material (c) in a low temperature state so as to overlap, the third cold storage material or the heat storage material (c) is heated by the outside air temperature and absorbs the thermal energy. The second cold storage material or heat storage material (b) can be suppressed from being heated by high temperature outside air, and the second cold storage material or heat storage material (b) is cooled by the third cold storage material or heat storage material (c). The first cool storage material or the heat storage material (a) becomes the third cool storage material by releasing thermal energy to lower the temperature and further phase transition from the molten state (liquid) to the solidified state (solid). Or it is not overcooled by the heat storage material (c), and the first cold storage material or heat storage material ( ), It is possible to maintain within a predetermined temperature range above 0 ℃ the container 1B for a long time.

  In the present invention, since at least the first cold storage material or the heat storage material (a) is a cold storage material or a heat storage material having a solidification / melting temperature exceeding 0 ° C., a precise temperature in an arbitrary temperature range exceeding 0 ° C. Management becomes possible. However, the container management temperature is preferably 1 to 30 ° C., more preferably 2 to 8 ° C., due to the characteristics of the temperature management target articles such as pharmaceuticals and foods.

  Here, the in-container management temperature refers to an intermediate temperature between a lower limit temperature and an upper limit temperature of a predetermined temperature range (necessary temperature management range) for an article to be kept cold or kept warm, for example, an upper limit temperature at a lower limit temperature of 2 ° C. In the case of 8 ° C., (2 + 8) ÷ 2 = 5 ° C.

  In the present invention, when the management temperature in the container is A (° C.), the first cold storage material or heat storage material (a) in the solidification state at a solidification / melting temperature of (A-3) ° C. to (A + 3) ° C. It is preferable to use the second cold storage material or heat storage material (b) in a molten state at a solidification / melting temperature of (A-3) ° C. to (A + 3) ° C. It is preferable to use a cold storage material or a thermal storage material (a), (b) which is A (° C.). By using this combination of regenerator material or regenerator material (a), (b), the time during which the temperature can be precisely controlled becomes longer, particularly when the outside air temperature is lower than the in-container management temperature A (° C.). large.

  On the other hand, the solidification / melting temperature of the third cold storage material or heat storage material (c) when the outside air temperature is higher than the in-container management temperature A (° C.) is (A-15) ° C. to A (° C.). It is preferable and it is more preferable that it is (A-10) degreeC-(A-5) degreeC. By using this combination of regenerators or regenerators (a) to (c), the time during which the temperature can be precisely controlled becomes longer, and particularly effective when the outside air temperature is higher than the in-container management temperature A (° C.). large.

  Furthermore, the solidification / melting temperature is 2 to 8 ° C., the heat storage material (a) in the solidified state (solid), and the heat storage material (the solidification / melting temperature is 2 to 8 ° C. and in the molten state (liquid) ( It is particularly preferred to use b). By using this combination of regenerator material or regenerator material (a), (b), the time during which the temperature can be controlled at a temperature of 5 ° C. ± 3 ° C., which is particularly difficult to control the temperature, becomes longer. The effect is great when the temperature is lower than the control temperature of 5 ° C. ± 3 ° C.

  On the other hand, when the outside air temperature is higher than the management temperature in the container, as the third regenerator material or the regenerator material (c), a regenerator material having water as a main component and a solidification / melting temperature of −5 to 0 ° C. It is particularly preferred to use By using this combination of regenerators or regenerators (a) to (c), the time during which the temperature can be controlled at a temperature of 5 ° C. ± 3 ° C., which is particularly difficult to control the temperature, becomes longer. The effect is large when the temperature is higher than the control temperature of 5 ° C. ± 3 ° C.

There are no particular limitations on the materials of the heat storage type first and second heat storage materials or heat storage materials (a) and (b) used in the present invention. For example, sodium sulfate decahydrate, sodium acetate 3 Inorganic hydrate salt heat storage material such as hydrate, potassium chloride hexahydrate, quaternary ammonium salt hydrate, etc .; paraffin wax, saturated fatty acid having C _{6 to} C ₁₈ carbon chain, C ₆ Amount of an organic compound heat storage material such as an unsaturated fatty acid having a carbon chain of ˜C ₁₈ and polyalkylene glycol; described in JP-A-2006-96898, insoluble in water and soluble in polyalkylene glycol Examples include an aqueous solution of at least one salt and a heat storage material composition containing polyalkylene glycol. Among these, the heat storage material composition described in Japanese Patent Application Laid-Open No. 2006-96898 is preferable in that it is inexpensive, safe, and excellent in temperature control and temperature management time. Particularly preferred.

  The material of the third regenerator material or the regenerator material (c) is not particularly limited, and a regenerator material mainly composed of water such as an aqueous potassium hydrogen carbonate solution, an aqueous potassium chloride solution, an aqueous ammonium chloride solution, or an aqueous sodium chloride solution; And a regenerator material containing a superabsorbent polymer. Among these, a cold storage material having water as a main component and having a solidification / melting temperature of −5 to 0 ° C. is inexpensive, safe and preferable.

  In the embodiment shown in FIGS. 1, 2, and 3, the first to third cold storage materials or the heat storage materials (a), (b), and (c) are stacked only on the upper and lower sides in the box 2. There are no particular limitations on the location of the cool storage material or the heat storage materials (a) to (c) in the box 2. That is, it is only necessary to arrange the cool storage material or the heat storage material (a), (b), (c) in accordance with the present invention. For example, the regenerators or regenerators (a) and (b), and (c) may be arranged in this order only on the side surface of the box 1, and these regenerators on all the upper and lower surfaces and side surfaces. Alternatively, the heat storage materials (a), (b), and (c) may be stacked in this order. Usually, it is preferable to arrange a cool storage material or a heat storage material on a larger number of surfaces as the difference between the container management temperature and the outside air temperature increases.

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

<Example 1>
Inside the insulated polystyrene foam container 1 (outer dimensions are 620 mm × 420 mm × 470 mm, inner dimensions are 500 mm × 300 mm × 350 mm), as shown in FIG. The foamed polystyrene inner box 5 (outer dimensions 430 mm × 297 mm × 165 mm, inner dimensions 390 mm × 255 mm × 125 mm) was accommodated in the approximate center of the space to obtain a measurement package.

  The first heat storage material (a) [made by Tamai Kasei Co., Ltd., Passamo P-5, which is in a solidified (solid) state in a 4 ° C environment and has a solidification / melting temperature of 5 ° C with respect to the upper and lower surfaces of the inner box 5 [Solidified under 4 ° C. environment] Four 500 g pieces were arranged on the top and the bottom, and two pieces of the heat storage material (a) were also arranged on the side surfaces. The second heat storage material (b) [Passaimo P, manufactured by Tamai Kasei Co., Ltd.], which is in a molten (liquid) state at a room temperature of about 20 ° C. on the upper and lower surfaces of the heat storage material (a) and has a solidification / melting temperature of 5 ° C. -5 was melted at room temperature around 20 ° C.] Two 200 g pieces were arranged. Further, a third cold storage material (c) mainly made of water in a completely frozen (solid) state in an environment of 0 ° C. or lower on the upper and lower surfaces of the heat storage material (b) [Tamai Kasei Co., Ltd., Cold Eight pieces of 500 g each of ice (coagulation / melting temperature = 0 ° C. completely frozen) were placed.

  In addition, the 500g 1st heat storage material (a) used the thing with which it filled with the polyethylene blow container of 140 mm x 220 mm x 25 mm. 200 g of the second heat storage material (b) is a bag made of foamed polyethylene having a thickness of 1 mm and containing a heat storage material filled in a 0.9 mm bag in which polyethylene and polyamide are laminated, and the size is 230 mm × 290 mm × A 7 mm object was used. As the third cold storage material (c) of 500 g, a material filled in a polyethylene blow container of 140 mm × 220 mm × 25 mm was used.

  The measurement package as described above was left in a thermostatic chamber adjusted to 35 ° C., and the temperature in the inner box 5 was measured using a data logger [manufactured by T & D Co., Ltd., RTR-52]. . The result is shown in FIG. In the graph of FIG. 4, the vertical axis represents temperature, and the horizontal axis represents elapsed time. As shown in the graph of FIG. 4, the temperature in the box 5 could be maintained within 5 ° C. ± 3 ° C. for 40 hours or more.

<Example 2>
A measurement package was obtained in the same manner as in Example 1 with the arrangement of the cold storage material or the heat storage material.
The measurement package was left in a thermostatic chamber adjusted to 15 ° C., and the temperature in the box 5 was measured using a data logger. The result is shown in FIG. In the graph of FIG. 5, the vertical axis represents temperature, and the horizontal axis represents elapsed time. As shown in the graph of FIG. 5, the temperature in the box 5 could be maintained within 5 ° C. ± 3 ° C. for 96 hours or more without deviating to 2 ° C. or less.

<Example 3>
A measurement package was obtained in the same manner as in Example 1 except that the arrangement of the cold storage material or the heat storage material was changed as follows.

  Four 500g each of heat storage material (a) with a solidification / melting temperature of 5 ° C in a solidified (solid) state in an environment of 4 ° C with respect to the upper and lower surfaces of the inner box are arranged on the upper and lower sides. Two each of the heat storage materials (a) were arranged. Two 200 g of heat storage materials (b) each having a solidification / melting temperature of 5 ° C. in a molten (liquid) state at a room temperature of about 20 ° C. were arranged on the upper and lower surfaces. Further, on the top and bottom surfaces, 500 g of water-based regenerator material (c), which is completely frozen (solid) in an environment of 0 ° C. or lower, was placed in the top 12 and the bottom 8.

  The measurement package was left in a thermostatic chamber adjusted to 35 ° C., and the temperature in the inner box 5 was measured using a data logger. The result is shown in FIG. In the graph of FIG. 6, the vertical axis represents temperature and the horizontal axis represents elapsed time. As shown in the graph of FIG. 6, the temperature in the inner box 5 could be maintained within 5 ± 3 ° C. for 72 hours or more.

<Comparative Example 1>
A measurement package was obtained in the same manner as in Example 1 except that the arrangement of the cold storage material or the thermal storage material was changed as follows.

  On the upper and lower surfaces of the inner box 5, four 500 g of regenerators (d, solidification / melting temperature = 0 ° C) mainly composed of water adjusted to a 4 ° C environment are arranged, and the same regenerator ( d) Two pieces were arranged on the left and right. On each of the upper and lower surfaces, 500 g each of a regenerator material (c, solidification / melting temperature = 0 ° C.) mainly composed of water in a completely frozen (solid) state in an environment of 0 ° C. or less was arranged.

  The measurement package was left in a thermostatic chamber adjusted to 35 ° C., and the temperature in the box 5 was measured using a data logger. The result is shown in FIG. In the graph of FIG. 7, the vertical axis represents temperature and the horizontal axis represents elapsed time. As shown in the graph of FIG. 7, the temperature in the box 5 once decreased to 2 ° C. or less.

<Example 4>
A measurement package was obtained in the same manner as in Example 1 except that the arrangement of the cold storage material or the thermal storage material was changed as shown in FIG.

  On the top and bottom surfaces of the inner box, 8 heat storage materials (a) 500 g each having a solidification / melting temperature of 5 ° C. in a solidified (solid) state in a 4 ° C. environment are arranged up and down, and the same heat storage material ( Two a) were arranged. On each of the upper and lower surfaces, 12 each of 500 g of heat storage material (b) having a solidification / melting temperature of 5 ° C. in a molten (liquid) state at a room temperature of about 20 ° C. was arranged.

  The measurement package was left in a high-temperature bath adjusted to −10 ° C., and the temperature in the inner box 5 was measured using a data logger. The result is shown in FIG. In the graph of FIG. 8, the vertical axis represents temperature and the horizontal axis represents elapsed time. As shown in the graph of FIG. 8, the temperature in the box 5 could be maintained within 5 ± 3 ° C. over 66 hours or more.

  The 500 g of the heat storage material (a) used was a material filled in a polyethylene blow container of 140 mm × 220 mm × 25 mm. As the 500 g of the heat storage material (b), a material filled in a polyethylene blow container of 140 mm × 220 mm × 25 mm was used.

<Example 5>
A measurement package was obtained in the same manner as in Example 1 except that the arrangement of the cold storage material or the heat storage material was changed to the following configuration shown in FIG.

  On the upper and lower surfaces of the inner box 5, four 500 g of heat storage materials (a) having a solidification (solid) state in a 4 ° C. environment and having a solidification / melting temperature of 5 ° C. are arranged vertically, and the same heat storage material (a ) Were arranged for each two. One foam plastic plate [made of polystyrene foam] 6 having a thickness of 10 mm was disposed on the upper and lower surfaces of the heat storage material (a). Further, 8 pieces each of 500 g of the heat storage material (b) having a melting (liquid) state at a room temperature of about 20 ° C. and a solidification / melting temperature of 5 ° C. were arranged on the upper and lower surfaces of the foamed plastic plate 6.

  The measurement package was left in a thermostatic chamber adjusted to −10 ° C., and the temperature in the box 5 was measured using a data logger. The result is shown in FIG. In the graph of FIG. 9, the vertical axis represents temperature, and the horizontal axis represents elapsed time. As shown in the graph of FIG. 9, the temperature in the inner box 5 could be maintained within 5 ° C. ± 3 ° C. for 40 hours or more at a temperature of −10 ° C.

<Comparative Example 2>
A measurement package was obtained in the same manner as in Example 1 except that the arrangement of the cold storage material or the heat storage material was changed as shown below.

  On the upper and lower surfaces of the inner box 5, 12 500g of heat storage materials (a) having a solidification / melting temperature of 5 ° C in a solidified (solid) state in an environment of 4 ° C are placed on the top and 16 pieces on the bottom. However, two each of the same heat storage materials (a) were arranged.

  The measurement package was left in a thermostatic chamber adjusted to −10 ° C., and the temperature in the inner box 5 was measured using a data logger. The result is shown in FIG. In the graph of FIG. 10, the vertical axis represents temperature and the horizontal axis represents elapsed time. As shown in the graph of FIG. 10, the temperature in the inner box 5 could be maintained within 5 ± 3 ° C. for only 30 hours.

a. A first heat storage material having a solidification / melting temperature of 5 ° C in a solidified (solid) state at 4 ° C.
b. A second heat storage material having a solidification / melting temperature of 5 ° C. in a molten (liquid) state around 20 ° C.
c. A third regenerator material that is completely frozen (solid) in an environment of 0 ° C. or less, mainly water.
1A, 1B, 1C constant temperature storage container Foamed plastic insulated container (outer box).
3. Box body.
4). Lid.
5). Foamed plastic container (inner box) to hold the internal shape.
6). A foamed plastic plate with a thickness of 10 mm.

Claims (12)

A constant temperature storage container provided with a heat insulating box and two or more kinds of cold storage materials or heat storage materials arranged inside the box,
Adjacent to the article to be kept cold or warm, the first heat storage material or heat storage material (a) of the latent heat type in a solidified state is disposed, outside the first cold storage material or heat storage material (a), A latent heat type second cold storage material or heat storage material (b) in a molten state is disposed, and the solidification / melting temperature of the first cold storage material or heat storage material (a) exceeds 0 ° C. A constant temperature storage container.   A third cold storage material or heat storage material (c) in a lower temperature state than the second cold storage material or heat storage material (b) is disposed outside the second cold storage material or heat storage material (b). The constant temperature storage container according to claim 1.   The constant temperature storage container according to claim 1 or 2, wherein the in-container management temperature A (° C) is 1 to 30 ° C.   When the in-container management temperature is A (° C.), the solidification / melting temperature of the first cold storage material or heat storage material (a) and the second cold storage material or heat storage material (b) is (A-3). The constant temperature storage container according to any one of claims 1 to 3, wherein the temperature is between? C and (A + 3) C.   The solidification / melting temperature of the third cold storage material or heat storage material (c) is (A-10) ° C to (A-5) ° C when the management temperature in the container is A (° C). The constant temperature storage container in any one of 2-4.   The solidification / melting temperature of said 1st cool storage material or heat storage material (a) and said 2nd cool storage material or heat storage material (b) is 2 to 8 degreeC, Constant temperature in any one of Claims 1-5 Storage container.   The constant temperature storage container according to any one of claims 2 to 6, wherein a solidification / melting temperature of the third cold storage material or thermal storage material (c) is -5 to 0 ° C.   At least one of the first cold storage material or heat storage material (a) and the second cold storage material or heat storage material (b) is insoluble in polyalkylene glycol and at least one aqueous solution of water-soluble salts. And a constant temperature storage container according to any one of claims 1 to 7, comprising a heat storage material composition containing polyalkylene glycol.   The constant temperature storage container in any one of Claims 2-8 whose said 3rd cool storage material or heat storage material (c) is a cool storage material which has water as a main component.   The constant temperature storage container according to any one of claims 1 to 9, wherein an article to be kept cold or warm is contained in a heat insulating inner box.   The article to be kept cold or kept in the constant temperature storage container according to any one of claims 1, 3, 4, 6, 8, and 10 in a situation where the outside air temperature of the container is lower than the inside management temperature A (° C). A method for transporting goods, comprising storing and transporting the goods. In a situation where the outside air temperature of the container is higher than the in-container management temperature A (° C.), the constant temperature storage container according to any one of claims 2 to 10 is used to store and transport the article to be kept cold or kept warm. A method for transporting goods.

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