JP2013249125A - Low temperature container for transportation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve a low temperature container for transportation with middle capacity capable of maintaining a low temperature of minus 20°C or lower for a long time by using only dry ice.SOLUTION: A low temperature container 100 for transportation has a casing panel 240 forming a rectangular solid like sealed container by combining a front face panel 220 and a top face panel 210. It is provided with a plurality of first cold insulator holding containers 50 arranged facing side face panel parts 242, 243 forming side face parts of the casing panel, and overlapped in a height direction; and a plurality of second cold insulator holding containers 60 arranged facing a rear face panel part 241 forming a rear face part of the casing panel and the front face panel, and overlapped in the height direction.

Description

  The present invention relates to a low temperature container for transportation, and more particularly to a low temperature container for transportation suitable for being mounted on an aircraft and kept below freezing point.

  An example of a conventional cold container is described in Patent Document 1. The cold storage container described in this publication has a large number of ventilation holes at positions spaced inward from the side wall and the back wall of the container main body in order to keep a full load loaded with no power supply. The partition plate which has is erected along the height direction. And the load is loaded inside the partition plate, and a side flow passage and a back flow passage for cold air are formed between the side wall and the back wall and the partition plate. In these flow passage portions, convection is generated by the cool air released from the dry ice and the warm air released from the cargo.

  Another example of a conventional cold insulator is described in Patent Document 2. The cold box described in this publication has a canopy that can be opened and closed so that the cooling medium is not biased even if dry ice is reduced. The cool box has a dry ice storage inner lid in which a storage portion having an open top surface is formed, and the bottom surface portion of the storage portion is made of a heat-permeable material that can transmit cold air and a heat-permeable material. And a shape-retaining material for preventing the damage.

  Patent Document 3 describes an example of a low-temperature container for transportation to be mounted on an aircraft or the like. The air cargo container described in this publication has a modular cooling unit in the container, and a control unit is attached corresponding to this unit. The cooling unit includes an ice box that stores dry ice. Air around the ice box is cooled by dry ice in the ice box, and the cooled air is sent to the container by a fan. An example of a container having a pallet structure is described in Patent Document 4.

JP 2000-241056 A JP 2010-216071 A Special table 2003-522687 JP 9-272588 A

  In the conventional container and the cold box, dry ice is used in consideration of transportation. When dry ice is used, the article to be kept cold can be set to −20 ° C. or lower. However, in order to keep −20 ° C. or lower for a long time, further devices are required.

  For example, although the thing of the said patent document 1 can cool a large capacity | capacitance goods without a power supply, it does not consider even carrying to overseas remote places by air transportation. Moreover, although the thing of the said patent document 2 is considered effective when it is made portable, use of a hook_and_loop | surface fastener etc. has a possibility that interruption | blocking of an intrusion heat may become inadequate.

  In addition, the container described in Patent Document 3 for air transportation is not only a large-scale apparatus, but it is considered that additional equipment is required when the cold insulation temperature is further lowered.

  The present invention has been made in view of such problems of the prior art, and in particular, has been made to realize a medium-capacity low-temperature transport container used in a container as described in Patent Document 3 above. The purpose is to realize a medium-capacity transporting low-temperature container that can maintain a low temperature of −20 ° C. or lower with dry ice alone for a long time (for example, 72 hours or longer).

  A feature of the present invention that achieves the above object is a low temperature container for transportation having a casing panel that forms a rectangular parallelepiped sealed container in combination with a front panel and a top panel, and a side surface that forms a side portion of the casing panel. A plurality of first cold-retaining agent holding containers that are disposed so as to be opposed to the panel portion in the height direction, a rear panel portion that forms a rear surface portion of the housing panel, and the front panel in the height direction. A plurality of second cooling agent holding containers arranged in an overlapping manner are provided.

  And in this feature, a first engagement for engaging a plurality of first cold-retaining agent holding containers disposed at a plurality of positions in the height direction of the side panel portion so as to be opposed to the side panel portion in the height direction. A second locking mechanism that locks a plurality of second cold-retaining agent containers that are disposed in the height direction so as to face the front panel and the rear panel that forms the rear surface portion of the housing panel; Means are preferably provided. It is preferable that the cooling agent accommodated in the first and second cooling agent holding containers is pellet-shaped dry ice, and the casing panel is formed by stacking a plurality of vacuum heat insulating materials between aluminum plates. It is desirable that

  Preferably, the top panel is arranged by laminating a plurality of vacuum heat insulating materials between aluminum plates, and a sealing means is interposed between the casing panel via a polymer polyethylene plate at the contact portion with the casing panel. It is in contact with the body panel and avoids metal installation in contact with both the inside and outside air, and a pallet into which the fork of the forklift can be inserted is integrally provided on the bottom surface of the casing panel.

  Furthermore, it is desirable that the container can be mounted on an aircraft.

  According to the present invention, in the low-temperature container for transportation that can be accommodated in the air cargo container, the dry ice holding means is provided at a plurality of positions in the height direction of the side surface of the container. (For example, 72 hours or more) can be maintained. In addition, since the vacuum insulation material is built in the wall of the shipping container and the dry ice is placed close to the wall, the heat insulation is improved and the low temperature of -20 ° C or lower can be maintained for a long time with only dry ice. It was.

It is a perspective view of one Example of the low temperature container for transport based on this invention. It is a perspective view of the housing | casing panel part of the low-temperature container for transport shown in FIG. FIG. 3 is a perspective view of a cryogen holding container held on the inner wall of the housing panel shown in FIG. 2. It is the front view and side sectional drawing of the principal part of the cryogenic container for transport shown in FIG. It is the front view and side view of a top panel with which the cryogenic container for transportation shown in FIG. 1 is provided. FIG. 6 is a detailed cross-sectional view of a portion D in FIG. 4 and a portion E in FIG. 5.

  An embodiment of a low-temperature container for transportation according to the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a low temperature container 100 for transportation. 2 is a perspective view of the front panel 220 and the top panel 210 removed from the low-temperature transport container 100 shown in FIG. 1 (FIG. 2A), and guide rails attached to the left and right side panel portions of the housing panel 240. 41 is a perspective view of FIG. 41 (FIG. 2B) and the locking metal fitting 42 (FIG. 1C).

  The transporting low temperature container 100 is a rectangular parallelepiped container, and is configured such that the front panel 220 and the top panel 210 are detachable. The outer diameter of the low-temperature container 100 for transportation is such that the width direction length W is W = 1100 mm, the height H is H = 1100 mm, and the depth direction length L is about L = 700 mm. Two ENVIROTAINER (International Trademark Registered) containers RKN used by ENVIROTAINER can be mounted side by side.

  Returning to FIG. 1, a pallet 233 into which the fork lift fork is inserted is fixed to the bottom surface of the transport cryocontainer 100 so that the transport cryocontainer 100 can be moved from four directions using a forklift or a hand lift. Is provided. In addition, in order to attach / remove the front panel 220 to / from the left and right side panel portions 242 and 243 of the housing panel 240, clasps 235a are provided at a plurality of positions in the left and right side portions of the front panel 220 in the height direction. Clasps 235b are provided at a plurality of positions in the height direction at positions where the clasps 235b can be engaged with the clasps 235a at the front end portions of the left and right side panel portions 242 and 243 of the panel 240. Similarly, clasps 234a are located on the left and right side portions of the top panel 210 and at a plurality of positions in the depth direction (front-rear direction), and are upper ends of the left and right side panel portions 242 and 243 of the housing panel 240 and clasps 234a. A plurality of clasps 234b are provided in the front-rear direction at positions where they can be locked. As will be described in detail later, the clasps 234 (234a, 234b) and 235 (235a, 235b) seal the front panel 220, the top panel 210, and the housing panel 240 to form the low temperature container 100 for transportation. Used for.

  As shown in FIG. 2, the housing panel 240 includes four panel portions, a rear panel portion 241, a right side panel portion 242, a left side panel portion 243, and a bottom panel portion 244, and each of these panel portions 241. The connection portion of ˜244 is welded to maintain airtightness. Details of the panel such as the housing panel 240 will be described later.

  The bottom panel 244 and the pallet 233 are integrally formed via a polyethylene plate, and the front side of the pallet 233 extends by the thickness of the front panel 220. The pallet 233 is arranged between the pallet top plate 233a and the pallet bottom plate 233b, which are two rectangular plates arranged in parallel, and between the pallet top plate 233a and the pallet bottom plate 233b, and at the corners and in the middle of each side. And a plurality of pallet spacers 233c for securing a fork insertion space.

  On the inner surface side of the left and right side panel portions 242, 243, a holder for holding the cryogen holding containers 50, 60, which will be described in detail later, on the left and right side panel portions 242, 243 is attached by welding. The holders are two guide rails 41 (41a, 41) arranged in parallel with respect to the cooling agent holding container 60 arranged close to the front panel 220 and the rear panel 241. The left and right side panel portions 242, 243 are vertically arranged at a slight distance from each other at the front end and the rear end. The holder for the cold-insulating agent container 50 disposed close to the left and right side panel portions 242 and 243 is a locking metal fitting 42 formed of a bent plate with a step, and the height of the left and right side panel portions 242 and 243 A plurality of locations (three locations in FIG. 2A) are arranged at substantially equal pitches in the direction. The locking metal fittings 42 are provided at one or a plurality of intermediate portions in the front-rear direction of the left and right side panel portions 242, 243, and the upper side is attached with a slight gap from the left and right side panel portions 242, 243. Yes.

  FIG. 3 is a perspective view showing the cryogen holding containers 50 and 60. FIG. 3A is a view showing the cold-retaining agent holding container 50 attached to the locking metal fittings 42 provided on the left and right side panel portions 242 and 243 with the attachment side to the left and right side panel portions 242 and 243 being the front side. . The cold-retaining agent holding container 50 has a shape in which the aluminum plate 54 is bent into a flat box shape, and the length in the front-rear direction when attached to the left and right side panel portions 242 and 243 is the inner volume portion of the low-temperature container 100 for transportation. It is formed in a horizontally long shape about the length of.

  The bottom and side surfaces (surfaces corresponding to the front and rear surfaces of the cryogenic container 100 for transportation) are flat plates whose surfaces are not processed, but the front surfaces (opposite to the left and right side panel portions 242 and 243). Surface), a large number of circular sublimation holes 51 are regularly formed on the surface. Although the sublimation hole 51 is not limited to a circle, it is a circle in this embodiment for ease of processing.

  FIG. 3C shows a cross-sectional shape of the back side of the cold-retaining agent holding container 50. FIG. 3C is a cross-sectional view taken along the line CC of FIG. A locking fitting 52 for engaging with the locking fitting 42 is formed at an intermediate portion in the vertical direction of the cold-retaining agent holding container 50. In the present embodiment, the locking metal fitting 52 is used, but the belt-like member may be attached so as to form a slight gap with the back surface of the cold-retaining agent holding container 50.

  The cold-retaining agent holding container 50 accommodates a cold-retaining agent in order to keep the space in the low-temperature container 100 for transportation at −20 ° C. or lower. Dry ice is mainly used as the cooling agent. Dry ice is often used because pellets are easy to use. Dry ice cools the inside of the low-temperature container 100 for transport by sublimation.

In order to promote the sublimation of dry ice, a large number of sublimation holes 51 are formed in the cold holding container 50 as described above, but the size of the dry ice decreases as the sublimation of the dry ice proceeds. There is a risk of spilling from the sublimation hole 51 toward the object to be cooled. Therefore, a punching plate 56 that allows CO ₂ gas to pass but does not allow dry ice to pass is attached to the front side of the cold-retaining agent holding container 50.

  The upper surface of the cold-retaining agent holding container 50 is an opening surface, and a cold-reserving agent supply hole 55 for filling the container 50 with pellet-shaped dry ice is formed. Note that handles 53 are attached to a plurality of locations on the upper surface in order to improve the handleability and strength of the cryogen storage container 50.

  The cryogen holding container 60 disposed in the vicinity of the front panel 220 and the rear panel unit 241 has substantially the same configuration as the cryogen holding container 50. In other words, the aluminum plate 64 is bent to form a box having a cooling agent supply hole 65 formed in the upper portion, and a large number of sublimation holes 61 are regularly formed on the front side of the cooling agent holding container 60. In addition, in order to improve the handleability and prevent deformation of the cryogen holding container 60, handles 63 are provided at a plurality of locations on the upper surface. Further, although not shown, a punching plate is disposed inside the cold-retaining agent holding container 60 on the front side.

  However, in order to attach to the guide rails 41 provided on the left and right side panel portions 242 and 243, locking projections 62 are provided at intermediate portions in the height direction on both side surfaces of the cryogen holding container 60. By sandwiching the projection 62 between the two guide rails 41a and 41b, the cold-retaining agent holding container 60 is held by the left and right side panel sections 242 and 243.

  FIG. 4 shows a state in which the cryogen holding containers 50 and 60 formed in this way are attached in the low temperature container 100 for transportation, with the front panel 220 and the top panel 210 removed. FIG. 4A is a front view of the low temperature container 100 for transportation, and FIG. 4B is a right side view of the low temperature container 100 for transportation with the right side panel portion 242 removed.

  Refrigerant holding containers 50 and 60 are attached to the left and right side panel sections 242 and 243 in three stages in the vertical direction. The object to be cooled 80 is accommodated in three stages in the space surrounded by the cold-retaining agent holding containers 50 and 60. A cooling agent holding container 70 is disposed above the body 80 to be cooled. A number of holes for sublimation are regularly formed on the lower surface of the cold-retaining agent holding container 80 like the front portions of the cold-retaining agent holding containers 50 and 60, and a punching plate 76 is disposed on the inner surface thereof.

  FIG. 5 is a front view and a side view showing a top panel 210 that constitutes a low temperature container for transportation in combination with the housing panel 240 shown in FIG. The front panel 220 has substantially the same configuration, but only the configuration of the sealing member on the upper side is different from the top panel 210. The top panel 210 is provided with sealing means 211 on the entire surface in contact with the upper end surface of the housing panel 240. By this sealing means 211, heat penetration from outside and leakage of sublimated CO2 gas to the outside are prevented.

  Details of the sealing surfaces of the top panel 210 and the housing panel 240 will be described with reference to FIG. 6A is a detailed cross-sectional view of a portion D in FIG. 4B, and FIG. 6B is a detailed cross-sectional view of a portion E in FIG. 5A. The panel portions 241 to 244 constituting the casing panel 240 are formed by arranging casing walls 241a and 241b made of two aluminum plates having thicknesses t and t = 2 mm in parallel at intervals of 30 to 50 mm. A plurality of (two in the figure) vacuum heat insulating materials 241c are stacked between the housing walls 241a and 241b.

  As the vacuum heat insulating material 32, a material in which glass wool is accommodated between plastic films on which aluminum foil or the like is deposited is used. The periphery of the vacuum heat insulating material 241c is filled with a polymer polyethylene plate 241e and used as a heat conduction preventing material. In order to lock the housing wall 241a and the housing wall 241b, a set screw member 241d is embedded on the polyethylene plate 241e side, and the set screw 241f is screwed into the set screw member 241d. The screw mounting pitch and the like are changed so that the positions of the left and right set screws 241f are not the same position.

  The top panel 210 arranged on the upper surface is also formed into a box shape by bending an aluminum plate 210a having a thickness of t and t = 2 mm, and a flat aluminum plate 210b is locked to the box shape with a set screw (not shown). It has a structure. At this time, in order to prevent heat from entering from the outside, the two aluminum plates 210a and 210b are locked via a polymer polyethylene plate 210d so that they are not in direct contact with each other. A member 210e is disposed and positioned inside the polymer polyethylene plate 210d. A seal member 211 such as rubber is attached to the contact surface side of the polymer polyethylene plate 210d with the housing panel 240. A plurality of vacuum heat insulating materials 210c are stacked and arranged inside the top panel 210 which is a sealed container with two aluminum plates 210a and 210b. This vacuum heat insulating material 210 c is the same as that used for the housing panel 240.

According to the present embodiment, since a plurality of vacuum heat insulating materials are laminated inside the casing panel, the top panel, and the front panel, the casing panel and the top panel having a soft aluminum plate as an outer wall during forklift work or the like. Even if the front panel is deformed, any of the vacuum heat insulating materials provided therein is more likely to be intact, so that the redundancy is increased and the reliability of the heat insulating effect is improved. In addition, the sealing means is provided on the contact surface of the top panel and the casing panel, and the front panel and the casing panel to prevent metal contact between the casing walls, so that the intrusion of heat from the outside and the sublimated CO to the outside. ₂ Gas leakage can be prevented.

  In addition, according to the present embodiment, since a structure in which the cooling agent holding means is divided into a plurality of parts in the vertical direction is adopted, CO2 gas heavier than the air generated by sublimation does not stay only in the lower part, and the housing Since it also stays in the middle part, the internal temperature of the low-temperature container for transportation can be made uniform over a long period of time, and therefore the internal temperature can also be kept lowered. This ensures a stable low temperature over a long period of time even when the ambient environment is different, such as loading from a container loading location to an aircraft, flying on an aircraft, transportation from an aircraft to transportation to the demand source, etc. it can.

  Furthermore, according to the present embodiment, since the cryogen holding container is divided into a plurality of parts, the work at the time of filling with dry ice can be quickly performed. In addition, since the mounting to the left and right side panels is only the insertion of the protrusions on the guide rail and the hooking of the locking brackets, it is only necessary to insert them into the locking brackets and the guide rails in order from the one located below. It becomes easy. At the same time, it is possible to achieve maintenance of a low-temperature environment that requires work in a short time without interfering with the mounting of the object to be cooled and the holding in the container. Further, it is possible to take out / attach the cryogen holding container without taking out the object to be cooled.

Furthermore, in this embodiment, as a medium-sized container that can be handled as it is with a forklift or a handlift, an internal volume of about 0.55 m ³ and a maximum loading weight of about 170 kg can be achieved. This improves transportation efficiency.

41, 41a, 41b ... guide rail, 42 ... locking metal fitting, 50 ... cooling agent holding container (for side), 51 ... sublimation hole, 52 ... locking metal fitting, 53 ... handle, 54 ... aluminum plate, 55 ... cooling Hole for supplying agent, 56 ... Punching plate, 60 ... Reservoir holding container (for front and rear surfaces), 61 ... Hole for sublimation, 62 ... Protrusion for locking, 63 ... Handle, 64 ... Aluminum plate, 65 ... For supplying refrigerant Hole: 70 ... Reservoir holding container, 76 ... Punching plate, 80 ... Object to be cooled, 100 ... Low temperature container for transportation, 210 ... Top panel, 210a, 210b ... Plate, 210c ... Vacuum insulation, 210d ... Polyethylene plate, 210e ... member, 211 ... sealing means, 220 ... front panel, 233 ... pallet, 233a ... pallet top plate, 233b ... pallet bottom plate, 233c ... pallet spacer, 234, 234a, 234b ... Clasp, 235, 235a, 235b ... Clasp, 240 ... Housing panel, 241 ... Rear panel, 241a, 241b ... Housing wall, 241c ... Vacuum insulation, 241d ... Set screw member, 241e ... Polyethylene plate , 241f ... set screw, 242 ... right side panel part, 243 ... left side panel part, 244 ... bottom panel part.

Claims (7)

  In a low temperature container for transportation having a casing panel that forms a rectangular parallelepiped sealed container in combination with a front panel and a top panel, it overlaps in the height direction facing the side panel part forming the side part of the casing panel. A plurality of first cold-retaining agent holding containers, a rear panel portion that forms a rear surface portion of the housing panel, and a plurality of second cold-insulating components that are disposed to overlap the front panel in the height direction. A low-temperature container for transportation, characterized in that an agent holding container is provided.   First locking means for locking a plurality of first cold-retaining agent holding containers disposed in a plurality of places in the height direction of the side panel portion so as to face the side panel portion and overlap in the height direction; A rear panel that forms a rear surface portion of the housing panel and a second locking means that locks the plurality of second cold-retaining agent holding containers disposed to overlap the height direction facing the front panel are provided. The low-temperature container for transportation according to claim 1 characterized by things.   The cryogenic container for transportation according to claim 2, wherein the cryogen accommodated in the first and second cryogen retaining containers is dry ice pellets.   The low-temperature container for transportation according to any one of claims 1 to 3, wherein the casing panel is formed by stacking a plurality of vacuum heat insulating materials between aluminum plates.   The top panel is arranged by laminating a plurality of vacuum heat insulating materials between aluminum plates, and the sealing means is in contact with the casing panel through a polymer polyethylene plate at the contact portion with the casing panel. The low-temperature container for transportation according to any one of claims 1 to 4, wherein metal installation in contact with both inside and outside air is avoided.   The low temperature container for transportation according to any one of claims 1 to 5, wherein a pallet into which a fork of a forklift can be inserted is provided integrally on the bottom surface of the casing panel.   The low temperature container for transportation according to any one of claims 1 to 6, wherein the low temperature container can be mounted on an aircraft.

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