JP5056934B2 - Constant temperature transport container - Google Patents

Description

  The present invention relates to a transport container.

  Patent Document 1 describes an example of a constant temperature transport container that retains and transports a substance such as a cell tissue. In the transport container described in this publication, in order to transport the cell tissue medical device in the room temperature region, the transport container has a double structure of an inner container and an outer container, and the inner container has a function of buffering heat storage and heat transfer, outer The container is provided with a heat insulating function, and they are configured via a heat buffer material. This enables transportation in the room temperature region.

  On the other hand, Patent Document 2 describes an example of a cooler box for maintaining the freshness of fish and the like. In the cooler box described in this publication, in order to quickly transmit the cold insulation effect by the heat storage material to the entire container and reduce heat leakage from the outside, the inside of the container made of the heat insulating material has good heat conductivity. An inner can made of a metal member is mounted, and the inner can is provided with a protruding portion protruding outward to form an air layer in a gap with the container.

JP 2004-217290 A JP 2002-120880 A

  The conventional transport container for medical devices can easily hold the product to be transported within a predetermined temperature range. However, if the heat storage material to be stored in the inner container is not properly placed around the transported goods, the amount of heat held by the heat storage material cannot be used effectively to maintain the temperature, and even if the necessary amount of heat storage is stored The temperature may not be maintained for a long time. For example, if the heat radiation from the bottom surface of the transport container is too large, the amount of heat stored in the heat storage material installed on the bottom surface side is consumed early, and the temperature on the bottom surface side begins to decrease. In this case, even if a heat storage material having a sufficient heat storage amount is arranged on the upper surface side and the side surface portion, these heat storage amounts cannot be used. Therefore, in order to maintain the temperature of the transported product for a long time, it is necessary to enclose the heat storage material excessively or to determine an appropriate heat storage material arrangement for each ambient condition, container shape, and transported product.

  Moreover, since the said conventional cooler box comprises the inner can which accommodates goods to be transported and a heat storage material with a metal member having good thermal conductivity, the temperature of the heat storage material can be quickly transmitted to the entire inner can. it can. However, by making it easier to transfer heat throughout the inner can, an increase in heat loss or heat leakage to the surrounding air layer is inevitable, and more heat storage is required to maintain a predetermined temperature for a long time. It was necessary to enclose the material.

The present invention has been made in view of the above-described problems of the prior art, and an object thereof is to maintain a predetermined temperature range for a long time in a thermostatic transport container having a simple configuration .

In order to achieve the above object, the constant temperature transport container of the present invention includes an individual container for storing a transported product, a first heat storage material disposed in the individual container, an upper surface, a lower surface, and a side surface of the individual container. A heat conduction member that covers the upper surface of the individual container, and a second heat storage material disposed on the lower surface of the heat conduction member that covers the lower surface of the individual container. There is a space between the side surface of the container and the heat conducting member that covers the side surface of the individual container.

  According to the present invention, since the heat conducting member is appropriately arranged in the constant temperature transport container, the temperature in the individual packaging container that minimizes heat loss and heat leakage by the heat conducting member and accommodates the transported goods by heat conduction. The distribution can be made uniform. Moreover, since it has the structure which accelerates | stimulates the heat transfer from the thermal storage material installed in the upper and lower sides of the individual packaging container to the circumference | surroundings of the individual packaging container, the heat storage amount of the thermal storage material can be used effectively for temperature maintenance. Therefore, the temperature of the transported product can be kept almost constant for a long time.

The vertical direction sectional view in the 1st example. The horizontal direction sectional view in the 1st example. Installation method of heat storage container, heat conduction member and individual container. Detailed view of inside of individual packaging container and heat storage container. The test result showing the effect of a heat conductive member. The vertical direction sectional view in the 2nd example. The horizontal direction sectional view in the 2nd example. Details of the containment vessel and how to install the heat storage vessel, heat conduction member, and individual packaging.

Hereinafter, an embodiment of a constant temperature transport container according to the present invention will be described with reference to FIGS.
FIG. 1 is a longitudinal sectional view of the constant temperature transport container, and FIG. 2 is a transverse sectional view of the constant temperature transport container.

  The constant temperature transport container 30 includes a cylindrical heat insulating container 1 and a lid 25 that covers the upper surface of the heat insulating container 1. The heat insulating container 1 is formed of a cylindrical container 2, and a vacuum heat insulating material 3 is installed along the inner wall of the container 2. Inside the vacuum heat insulating material 3, a cushioning material 4 made of foamed polystyrene, urethane foam, sponge, or the like is arranged. The cushioning material 4 and a cushioning material 5 of the same material installed at the bottom of the container 2 are used to store the container 2. A cylindrical space 7 is formed at the center.

  As shown in FIG. 3, the space portion 7 is installed such that a heat storage container 10, a heat conduction member 11, and an individual container 12 containing a transported item (not shown) are stacked. As shown in FIG. 2, the corner portion of the heat storage container 10 or the individual container 12 is in contact with the cushioning material 4, whereby the heat storage container 10, the individual container 12, and the heat conducting member 11 are fixed to the space 7. . The heat conducting member 11 is molded into a U-shape, and is arranged so as to cover the side surface of the individual container 12 from above and below the individual container 12.

  The lid 15 is provided with a shock-absorbing material 5 and a vacuum heat-insulating material 3 that serve both as heat insulation and shock absorption, and maintains the airtightness of the space 7 using the elasticity of the shock-absorbing material 5 and can be opened and closed. It has become.

  FIG. 4 shows details of holding the transported goods 8 in the individual container 12 and details of the arrangement of the heat storage material 9. The individual container 12 includes a lid portion 13 and a box portion 14 having substantially the same shape. The mating surface of the lid portion 13 and the box portion 14 is covered with a stretchable film 15. The goods 8 are held in the space formed by the film 15, and the heat storage material 9 is held in the space in the lid portion 13 above the film 15 and the space in the box portion 14 below the film 15. For the heat storage material 9, it is desirable to use a latent heat storage material that changes phase at a constant temperature, such as sodium phosphate, paraffin, water, etc. Also, it is divided into plastic bags to prevent bias in the container It is desirable to enclose it and install it in a heat storage container or individual container.

  The vacuum heat insulating material 3 is formed by sealing the periphery of a fibrous core member with a thin plate or film and evacuating the inside. As the core member, for example, a metal fine wire or glass wool fiber, and as a film material, aluminum or Stainless steel plates or films are used.

  The individual container 12 is preferably made of a transparent resin so that the internal state can be grasped.

  The operation and operation of the constant temperature transport container 30 of the present embodiment configured as described above will be described below.

  When the predetermined temperature in the container is different from the ambient temperature, heat transfer occurs using the temperature difference as a driving force. When the ambient temperature is lower, heat is transferred from the inside of the container to the outside of the container, and conversely, when the ambient temperature is higher, the heat is transferred from the surroundings to the inside of the container. The heat storage materials 9 installed on the upper and lower sides release and absorb almost the same amount of heat as this amount of heat transfer, thereby preventing heat transfer in the individual container 12. Since the heat storage container 10 is installed adjacent to the upper and lower surfaces of the individual container 12, there is no temperature difference necessary for heat transfer, and heat that flows into or out of the individual container 12. Does not occur. On the other hand, on the side surface of the individual packaging container 12, the heat conduction member 11 that covers the side surface of the individual packaging container 12 is maintained at substantially the same temperature as the inside of the individual packaging container 12 because the heat transferred from the heat storage material 9 by heat conduction is maintained at the same temperature. No temperature difference occurs on the 12 side surfaces, and as a result, heat transfer is prevented. Since the heat storage material 9 releases and absorbs heat at a constant temperature, the temperature of the transported product 8 accommodated in the individual container 12 is also kept constant.

  After the heat storage material 9 in the heat storage container 10 has finished the phase change, the temperature of the transported article 8 is maintained by the heat storage material 9 installed in the individual container 12.

  The effect | action of the heat conductive member 11 is demonstrated based on a test result. In FIG. 5, the test result showing the temperature holding effect by a heat conductive member is shown. FIG. 5A shows the result when no heat conducting member is installed, and FIG. 5B shows the result when the heat conducting member is installed as in this embodiment. The curves in the figure represent the temperature of the central part and the peripheral part inside the stretchable membrane in which the transported goods are accommodated (corresponding to the installation location of the transported goods) and the temperature of the heat storage material installed in the heat storage container. Note that a copper plate was used as the heat conducting member, and a substance that changed phase around 36 ° C. was used as the heat storage material, and the ambient temperature was 2 ° C.

  From FIG. 5, when no heat conducting member is installed, the temperature starts to decrease from the peripheral portion inside the stretchable membrane before the temperature of the heat storage material in the heat storage container, and the temperature distribution around the transported goods becomes uneven. I understand that. On the other hand, when the heat conduction member is installed, the heat amount of the heat storage material installed in the heat storage container is consumed first to maintain the temperature, and then the heat amount of the heat storage material installed in the individual packaging container is used. Therefore, the temperature drop in the inner peripheral portion of the stretchable film is delayed, and the temperature around the transported product is made uniform.

  The slope of the curve after the temperature drop is greater when the heat conducting member is installed, which means that most of the heat storage material undergoes phase change (solidification). When the heat conducting member is not installed, the gradient of the temperature curve is slow even after the temperature drops, and the temperature starts to drop before the heat storage material completes the phase change. Therefore, by installing the heat conducting member, a large proportion of the heat storage amount of the heat storage material can be used for maintaining the temperature, and excessive encapsulation of the heat storage material that leads to an increase in weight can be prevented.

  In addition, although heat loss becomes large by installation of the heat conductive member 11, this negative effect | action is canceled by the improvement effect of the above heat storage utilization factors. In order to prevent an increase in heat loss due to the heat conducting member 11 to a minimum, it is important to reduce the heat transfer on the surface where the heat conducting member 11 does not face the individual container 12. Measures such as mounting a heat insulating material such as urethane or sponge on the surface facing are effective.

In this embodiment, the operation of the heat conducting member 11 molded into a U-shape has been described. However, the shape of the heat conducting member 11 can be transferred from the heat storage material 9 in the heat storage container 10 and can be individually installed. The same effect can be obtained as long as it has a structure that covers the side surface of the container 12.
In addition to the copper plate, the heat conducting member 11 can be made of a material having high thermal conductivity such as an aluminum plate or a stainless plate.

  In the present embodiment, the space portion 7 provided in the heat insulating container serves as a heat insulating layer, and also contributes to improvement in workability such that the heat storage container 10 and the individual container 12 are easily taken in and out. . Note that when the heat insulation is more important, the operability is lowered, but the space portion 7 can be closed with a heat insulating material or the like.

  Another embodiment of the constant temperature transport container 30 according to the present invention is shown in FIGS. FIG. 6 is a longitudinal sectional view of this embodiment, and FIG. 7 is a transverse sectional view. The present embodiment is different from the embodiment shown in FIG. 1 in that a storage container 16 for accommodating the individual container 12, the heat storage container 10 and the like is newly provided, and as shown in FIG. In order to make it easy to put in and out the heat storage container 10, a cut 20 is made in the side surface of the storage container 16.

In this embodiment, the storage container 16 is fixed to the cushioning material 4 by its corners, and the individual container 12, the heat storage container 10, and the heat conducting member 11 are placed inside the storage container 16 on the cushioning material 17 arranged vertically. It is stored in a sandwiched form. For this reason, there is no risk of damaging the cushioning material 4 surrounding the space portion 7 when the transported goods are taken in and out, and the reliability of the apparatus over a long period can be ensured.

  In this embodiment, in order to prevent damage to the vacuum heat insulating material 3 due to impact or vibration during transportation, a protective material 18 made of a flexible material such as sponge is installed before and after the vacuum heat insulating material 3. Yes. In addition, a cylindrical member 19 formed of a hard resin or the like is installed inside the vacuum heat insulating material 3 so that the vacuum heat insulating material 3 is fixed and the airtightness of the space 7 can be opened and closed. It can be secured together with a cushioning material 6.

  DESCRIPTION OF SYMBOLS 1 ... Heat insulation container, 3 ... Vacuum heat insulating material, 4 ... Buffer material, 7 ... Space part, 8 ... Transport goods, 9 ... Heat storage material, 10 ... Heat storage container, 11 ... Heat conduction member, 12 ... Individual packaging container, 16 ... Containment container, 30 ... constant temperature transport container.

Claims (5)

An individual container for storing transport goods;
A first heat storage material disposed in the individual container;
A heat conducting member covering the upper surface, the lower surface, and the side surface of the individual container;
An upper surface of the heat conduction member covering the upper surface of the individual packaging container, and a second heat storage material disposed on the lower surface of the heat conduction member covering the lower surface of the individual packaging container,
A constant temperature transport container having a space between a side surface of the individual packaging container and the heat conducting member covering the side surface of the individual packaging container. The constant temperature transport container according to claim 1, wherein a heat storage material is not disposed in a side surface direction of the individual container. In claim 1 or 2, comprising a heat insulating container having a wall surface made of a heat insulating member,
A constant temperature transport container in which the accommodating part is cylindrical inside the heat insulating container, and the individual container is fixed to the accommodating part by a heat storage container that encloses the corner of the individual container and the second heat storage material. In claim 1 or 2, comprising a heat insulating container having a wall surface made of a heat insulating member,
The inside of the heat insulating container has a cylindrical storage part, and the second heat storage material, the heat conducting member, and a storage container that stores the individual container are fixed to the storage part, and A constant temperature transport container having a notch that enables the storage material, the heat conducting member, and the individual container to be taken in and out on a side surface of the storage container. 5. The constant temperature transport container according to claim 1, wherein the heat conducting member has a U shape.

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