JP2019052815A - Cryogenic cooling box - Google Patents

Abstract

To provide a cryogenic cooling box capable of preventing frost or ices from occurring at a joint portion even at an ultra-low temperature of -60°C or less.SOLUTION: A cryogenic cooling box 1 comprises an external box body 20 contacting with outside air, and an internal box body 10 provided entirely inside the external box body 20. Tabular heat insulation panels 3 of the external box body 20 and internal box body 10 are configured such that a recess part and a projection part provided at an end part of the heat insulation panel 3 are fitted to each other. Between the external box body 20 and the internal box body 10, a cavity part 2 is provided, wherein a temperature of the cavity part 2 is set to be equal to or less than a freezing point higher than a temperature of the internal box body and lower than an ambient temperature.SELECTED DRAWING: Figure 1

Description

  In particular, the present invention relates to an ultra-low temperature cool box having an internal temperature of −60 ° C. or lower.

  As a cold storage for freezing and storing stored items, a pair of aluminum surface plates, a synthetic resin frame member interposed between the side portions of these surface plates, and the both surface plate and frame material are formed. What is known is a combination of heat insulating panels composed of a foam heat insulating material that is injected and filled into a space formed by fitting (for example, see Patent Document 1).

  The heat insulating panel described in Patent Document 1 is provided with a concave portion or a convex portion formed on the outer surface of the frame member at the end of the panel from the viewpoint of bonding strength and airtightness, and the concave portion and the convex portion are fitted to each other. I am letting.

In addition, a heat insulating box (cold storage) that is connected to and supported by the building frame via a suspension member that is connected to the building frame of the refrigerated / refrigerated warehouse is provided with a convex frame material and a concave frame material for a plurality of heat insulating panels. What was connected and comprised by fitting is known (for example, refer patent document 2).
In the heat insulation box described in Patent Document 2, the fitting portion of the heat insulation panel is fixed with a joint seal made of silicone.

Japanese Patent Laid-Open No. 2015-25584 JP 2006-194258 A

  However, in recent years, in order to preserve foods, pharmaceuticals, and chemicals with higher freshness, cold storage at a lower temperature is required, and the temperature inside the refrigerator is also required to be extremely low such as −60 ° C. or less.

When the inside of the cold storage is set to such an ultra-low temperature, it comes into contact with the low-temperature air and the outside air leaking from the joint portion of the heat insulation panel, and frost and ice are generated.
There is a concern that the frost and ice grow significantly at the joints, causing distortion and breakage in the cold storage itself.

  In addition, if it is a normal cool box (about −40 ° C.), it is possible to prevent leakage of air in the cabinet from the joint by filling or arranging a sealing material such as caulking material or packing in the joint portion. When the interior is at an extremely low temperature (−60 ° C. or lower), there is a concern that a sealing material such as a caulking material or packing becomes brittle, loses flexibility, and cannot keep the interior airtight.

  This invention is made | formed in view of the said situation, and makes it a subject to provide the ultra-low temperature cooler which can suppress generation | occurrence | production of the frost and ice of a joint part even if it is ultra-low temperature of -60 degrees C or less.

  In order to solve the above-mentioned problems, the present invention provides an ultra-low temperature cold storage for freezing and storing a stored material at an ultra-low temperature, and an external storage body that comes into contact with the outside air, and the entire interior of the external storage body. The internal storage body and the external storage body and the internal storage body are configured by fitting a concave portion and a convex portion, each provided with a plate-like heat insulation panel at an end portion of the heat insulation panel, There is a gap between the outer casing and the inner casing, and the temperature of the gap is set to a temperature below the freezing point that is higher than the temperature in the inner casing and lower than the outside air temperature. (Claim 1).

By configuring in this way, the cold storage is a double structure of the external storage body and the internal storage body through a gap that is higher than the temperature in the internal storage body and lower than the freezing point lower than the outside air temperature. It is possible to make the structure so that high-temperature and high-humidity outside air does not directly touch the ultra-low-temperature internal cabinet, and the inflow of outside air can be prevented by making the pressure of the gap portion positive with respect to the outside air. .
In addition, by setting the temperature of the gap to below the freezing point, the amount of water vapor in the gap can be reduced.

  In this invention, it is preferable that the temperature in the internal container is set to −60 ° C. or lower, and the temperature of the gap is set to −20 ° C. or lower (claim 2).

  By comprising in this way, the water vapor amount of a space | gap part can further be reduced by making the temperature of a space | gap part into -20 degrees C or less.

  Further, in the present invention, the internal storage body is formed in a substantially rectangular shape in plan view, and an internal door body is provided at an internal doorway provided in one side wall so that the door can be opened and closed. The internal storage body surrounds the internal storage body through a gap between the three side walls other than the side wall having the internal entrance and exit of the internal storage body, and communicates with the clearance on the outer side of the internal entrance. An external door body is provided to be openable and closable at an external entrance provided in a side wall in a direction orthogonal to the internal entrance in the side wall constituting the entrance / exit space. (Claim 3).

  By configuring in this way, it is possible to easily control the temperature of the gap portion other than the entrance / exit portion between the external storage body and the internal storage body, and when the stored items are taken in and out, the external door body is opened. When it does, it can suppress that external air flows directly into the internal entrance / exit of an internal warehouse.

Moreover, in this invention, it is provided in the opposing part of the side wall of the said external storage body, and the side wall of the said internal storage body that the observation window which can see the said internal storage body from the outside of the said external storage body is provided. Preferred (claim 4).
Moreover, when an entrance is provided in the internal cabinet and the external cabinet, and an opening / closing door is provided in the entrance, the opposite portion of the side wall having the external entrance and the side wall having the internal entrance in the external cabinet In addition, it is preferable that a viewing window is provided through which the inside of the internal container can be seen from the outside of the external container.

By comprising in this way, the state in an internal container can be visually confirmed from the exterior of an external container.
In addition, by providing a viewing window at the opposite part of the side wall orthogonal to the side wall having the external doorway and the side wall having the internal doorway, when the stored items are taken in and out from the external doorway, The state of can be visually confirmed.

  In addition, in the present invention, it is preferable that an airtight tape made of aluminum is adhered to the outer surface of the fitting portion of the heat insulating panel constituting the internal container (claim 6).

  By comprising in this way, it can give airtightness to an internal warehouse, and while preventing inflow of external air, it can prevent the cold air leak inside a warehouse, and can also make a joint part flat with an airtight tape. Therefore, even if frost is generated, it can be easily and reliably removed.

  According to this invention, since it is configured as described above, the following remarkable effects can be obtained.

  (1) According to the first aspect of the invention, it is possible to make a structure in which high-temperature and high-humidity outside air does not directly touch the ultra-low temperature internal cabinet, and it is possible to prevent inflow of outside air, and the temperature of the gap Since the amount of water vapor in the gap can be reduced by setting the temperature below the freezing point, it is possible to suppress the generation of frost and ice in the joint portion of the internal container.

  (2) According to the invention described in claim 2, since the amount of water vapor in the gap can be further reduced, in addition to the above (1), the generation of frost and ice in the joint portion of the internal housing is further reduced. Can be suppressed.

  (3) According to the invention described in claim 3, it is possible to easily control the temperature of the void portion other than the entrance / exit portion between the external storage body and the internal storage body, and when the stored item is taken in and out. In addition to the above (1) and (2), since the outside air can be prevented from flowing directly to the internal entrance / exit of the internal cabinet when the external door is opened, the temperature management of the cold storage is sufficiently performed. It is possible to suppress the influence of the outside air temperature when taking in and out stored items.

(4) According to the inventions described in claims 4 and 5, since the state in the internal storage can be visually confirmed from the outside of the external storage, in addition to the above (1) to (3), It is possible to check the status of stored items without entering the ultra-low temperature internal container.
According to the invention described in claim 5, when the stored item is taken in and out from the external entrance, the state of the inner case can be visually confirmed from the outside of the outer case. Can be made easier.

  (5) According to the invention described in claim 6, in addition to the above (1) to (4), the internal casing is further airtight to prevent the inflow of outside air and to prevent cold air leakage inside the warehouse. In addition, even if frost or ice is generated, it can be easily and reliably removed.

It is a schematic cross-sectional view which shows an example of the ultra-low temperature cold storage which concerns on this invention. It is an expanded sectional view (a) which shows the I section of FIG. 1, and an expanded sectional view (b) which shows the II section of FIG. It is a front view of FIG. It is a right view of FIG. It is a left view of FIG. It is a rear view of FIG. It is a top view which shows the ceiling part of the external warehouse in this invention. It is a schematic cross-sectional view of the internal container in this invention. FIG. 8 is a left side view of FIG. 7. It is a top view which shows the ceiling part of the said internal warehouse. It is an expanded sectional view which follows the III-III line of FIG. It is an expanded sectional view which follows the IV-IV line of FIG. FIG. 5 is an enlarged end view taken along line VV in FIG. 1. It is an expanded sectional view which shows the observation window in this invention. It is a graph which shows the relationship between saturated water vapor amount-saturated water vapor pressure, and temperature.

  EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated in detail based on an accompanying drawing.

  The ultra-low temperature cool box 1 (hereinafter referred to as the cool box 1) according to the present invention includes an external box 20 that comes into contact with the outside air and an internal box 10 that is entirely installed inside the external box 20. It has a double structure in which a gap 2 is provided between the outer casing 20 and the inner casing 10.

  As shown in FIGS. 1 and 7 to 11, the internal container body 10 is formed in a substantially rectangular shape in plan view, and the internal door body 12 can be opened and closed at an internal doorway 11 provided in one side wall 10 a. A ceiling portion 13 is provided at the top of four side walls, that is, a side wall 10a having an internal doorway 11, a side wall 10b adjacent to the side wall 10a, a side wall 10c adjacent to the side wall 10b, and a side wall 10c and a side wall 10d adjacent to the side wall 10a. The floor 14 is provided at the bottom.

In addition, the internal storage body 10 is configured by fitting a concave portion 4 and a convex portion 5 provided with a plate-like heat insulating panel 3 at an end portion of the heat insulating panel 3.
In this case, as shown in FIG. 1A (a), the heat insulating panel 3 includes a pair of surface plates 6 and a frame member 7A and a convex portion 5 having a concave portion 4 interposed between the side portions of the surface plates 6. The frame member 7B is mainly composed of a foamable heat insulating material 8 such as foamed polyurethane filled in a space formed by the both surface plates 6 and the frame members 7A and 7B.

  The surface plate 6 is formed in a thin plate shape of a certain standard size by, for example, an aluminum alloy, and an end bent piece 6a that is bent vertically toward the opposite surface plate 6 is formed on each side. Has been.

Although FIG. 1A (a) demonstrated the fitting of the heat insulation panel 3 which comprises the side wall 10d, the heat insulation panel 3 which comprises the ceiling part 13 and the floor part 14 is the recessed part provided in the edge part of the heat insulation panel 3 similarly. 4 and the convex part 5 are made to fit.
In addition, the floor part 14 is formed in the shape similar to the ceiling part 13 shown in FIG.

In addition, the airtight tape 30 made from aluminum is affixed on the outer surface of the fitting part 9 (joint part) of the heat insulation panel 3 which comprises the internal storage body 10 (refer FIG. 1A (a)).
Thus, by sticking the airtight tape 30 on the outer side surface of the fitting portion 9 (joint portion) and closing the joint portion, the internal cabinet 10 is made airtight to prevent inflow of outside air, and Inside air leakage can be prevented. Moreover, since the surface of the airtight tape 30 is smooth, it can be easily removed even if frost or ice is generated and attached to the airtight tape 30.

  The internal doorway 11 provided in the side wall 10a of the internal cabinet 10 is provided at a position deviated from the center of the side wall 10a, and an internal door body 12 formed of a heat insulating panel is provided in the internal gateway 11 at the internal cabinet 10. It is attached so that it can be opened and closed toward the outside.

On the other hand, as shown in FIGS. 1, 2 to 6 and FIGS. 10 to 13, the external cabinet 20 has three side walls 20 b, 20 c and 20 d other than the side wall 20 a having the internal entrance 11 of the internal cabinet 10. The internal storage body 10 is surrounded via the gap portion 2 between them and the gap portion 2A for taking in and out the stored material communicating with the gap portion 2 is left outside the inner entrance 11. . In addition, an external door 22 formed of a heat insulating panel is provided in an openable and closable manner at an external doorway 21 provided in a side wall 20a in a direction orthogonal to the internal doorway 11 in the side wall constituting the clearance gap 2A. . In this case, the external door body 22 is attached so as to be openable and closable toward the outer side of the external cabinet 20.
In addition, the pressure control valve 50 is provided in the upper part of the heat insulation panel 3 which comprises the side wall 20d facing the side wall 20a (refer FIG. 2).

Further, the side wall 20a having the external entrance / exit 21 in the external warehouse 20 is orthogonal to the side wall 20b located outside the side wall 20b adjacent to the side wall 20a having the internal entrance / exit 11 of the internal warehouse 10. Are connected by side walls 20c. The space between the side wall 20c and the side wall 20a of the internal cabinet 10 is formed at equal intervals with the gap 2.
The ceiling part 23 is provided in the top part of side wall 20a, 20b, 20c, 20d comprised as mentioned above, and the floor part 24 is provided in the bottom part.

In addition, the external storage body 20 is configured by fitting the concave portion 4 and the convex portion 5 provided with the plate-like heat insulation panel 3 at the end of the heat insulation panel 3 in the same manner as the internal case body 10.
That is, as shown in FIG. 1A (b), the heat insulating panel 3 includes a pair of surface plates 6, frame members 7A and 7B interposed between the side portions of the surface plates 6, both surface plates 6 and the frame members. It is mainly composed of a foamable heat insulating material 8 such as foamed polyurethane filled in the space formed by 7A and 7B.

  Further, the surface plate 6 is formed in a thin plate shape of a certain standard size by, for example, an aluminum alloy, and an end bent piece 6a that is bent vertically toward the facing surface plate 6 is formed on each side. Is formed.

  In FIG. 1A (b), although the fitting of the heat insulation panel 3 which comprises the side wall 20d located outside the side wall 10d of the internal storage body 10 was demonstrated, the heat insulation panel 3 which comprises the ceiling part 23 and the floor part 24 is also shown. Similarly, it is comprised by fitting the recessed part 4 and the convex part 5 which were provided in the edge part of the heat insulation panel 3. As shown in FIG.

  The floor 24 is formed in the same shape as the ceiling 23 shown in FIG. The floor portion 24 is placed on a base 25 formed of a heat insulating material. Further, the internal cabinet 10 is installed on the floor via the installation table 15.

  In addition, the joint material 9 of the heat insulation panel 3 which comprises the external storage body 20 is filled with the sealing material 31 made from a silicone rubber in the joint part 9 (joint part) (refer FIG. 1A (b)).

  In the internal container body 10 and the external container body 20 configured as described above, a side wall 20c orthogonal to the side wall 20a having the external entrance / exit 21 of the external container body 20 and a side wall 10a having the internal entrance / exit 11 are disposed at opposing portions. In addition, viewing windows 40A and 40B are provided through which the inside of the internal cabinet 10 can be seen from the outside of the external cabinet 20. That is, a viewing window 40A is provided on the side wall 20c of the outer casing 20, and a viewing window 40B is provided on the side wall 10a of the inner casing 10 (see FIG. 13).

In this case, the viewing window 40A is a pair of glass 43 that is fitted and killed via a packing (not shown) to a buried tree 42 attached to the opening edge of the rectangular opening 41 provided on the side wall 20c of the external cabinet 20. It is formed by.
Further, similarly to the viewing window 40A, the viewing window 40B is fitted and killed through a packing (not shown) to a buried tree 42 attached to the opening edge of the rectangular opening 41 provided on the side wall 10a of the internal cabinet 10. The pair glass 43 is formed.

  In the above description, the case where the observation windows 40A and 40B are provided in the opposing portion of the side wall 20c orthogonal to the side wall 20a having the external entrance / exit 21 and the side wall 10a having the internal entrance 11 is described. A viewing window may be provided in the same manner at a portion where the other wall portion of the cabinet 20 and the wall portion of the internal cabinet 10 face each other.

  In the cool box 1 configured as described above, an internal refrigeration device 60 that cools the inside of the internal cabinet 10 and an external refrigeration device 60A that cools the inside of the external cabinet 20 are installed.

As shown in FIG. 1 and FIG. 10, the internal refrigeration apparatus 60 includes a refrigerator 61 and a duct 62 that supplies cold air cooled to a predetermined temperature of −60 ° C. or less by the refrigerator 61 into the internal cabinet 10. It has.
The cold air generated by the internal refrigeration apparatus 60 is fed to the upper part in the internal cabinet 10, and the temperature in the internal cabinet 10 is −60 ° C. or lower, which is suitable for preserving a stored product with a high freshness, for example − Set to 130 ° C. A perforated plate 63 that disperses the cold air fed from the duct 62 is provided in the inner box 10 in a horizontal manner.

  On the other hand, as shown in FIGS. 1 and 10, the external refrigeration apparatus 60 </ b> A includes an external refrigerator 61 </ b> A installed outside the external cabinet 20, and a space 2 </ b> A for taking in and out the stored items of the external cabinet 20. And a cooler 64 installed on the ceiling side. The cold air generated by the external refrigeration device 60A is supplied to the gap 2A of the external cabinet 20, the temperature in the gaps 2 and 2A is higher than the temperature in the internal cabinet 10, and the outside air It is set below the freezing point below the temperature, preferably below -20 ° C.

Here, the amount of water vapor in the gaps 2 and 2A can be reduced by setting the temperature of the gaps 2 and 2A below the freezing point.
Further, by setting the temperature of the voids 2 and 2A to −20 ° C. or lower, as is apparent from the graph shown in FIG. 14, when the temperature is −20 ° C. or lower, the amount of saturated water vapor is extremely reduced. The amount can be further reduced.
Note that the silicone rubber used for the sealing material 31 may become brittle when maintained in a low temperature environment of −60 ° C. or lower for a long time. Thereby, the sealing material 31 made of silicone rubber used for the fitting portion 9 (joint portion) of the external container 20 is set by setting the temperature of the gaps 2 and 2A to -20 ° C. or lower and higher than −60 ° C. Can be prevented and the flexibility of the sealing material 31 can be maintained.

  According to the cool box 1 of the embodiment configured as described above, it is possible to make a structure in which high-temperature and high-humidity outside air does not directly contact the ultra-low-temperature internal body 10, and the pressure in the gaps 2 and 2A In contrast, it is possible to prevent the inflow of outside air by reducing the amount of water vapor in the voids by setting the temperature of the voids 2 and 2A to below the freezing point, preferably -20 ° C or less. Therefore, generation | occurrence | production of the frost and ice in the fitting part 9 (joint part) of the internal storage body 10 can be suppressed.

  Moreover, the flexibility of the sealing material 31 used for the fitting part 9 (joint part) of the external container 20 is set by setting the temperature of the gaps 2 and 2A to a temperature lower than −20 ° C. and higher than −60 ° C. Since it can be maintained, the airtightness of the cold storage can be further improved.

  In addition, the temperature control of the gaps 2 and 2A other than the entrance / exit between the external storage body 20 and the internal storage body 10 can be facilitated, and the external door body 22 is opened when the stored items are taken in and out. Since the outside air can be prevented from flowing directly to the internal entrance 11 of the internal storage body 10 when the storage is performed, the temperature control of the cool box 1 can be sufficiently performed, and the influence of the external temperature when the stored items are taken in and out. Can be suppressed.

In addition, by providing observation windows 40A and 40B at opposing portions between the side wall of the external cabinet 20 and the side wall of the internal cabinet 10, the state inside the internal cabinet 10 can be visually confirmed from the outside of the external cabinet 20. Therefore, it is possible to check the status of stored items without entering the ultra-low temperature internal container.
At this time, when the observation windows 40A and 40B are provided at the opposite portions of the side wall 20c orthogonal to the side wall 20a having the external doorway 21 and the side wall 10a having the internal doorway 11, the stored items are taken in and out from the external doorway 21. Moreover, since the state in the internal container body 10 can be visually confirmed from the outside of the external container body 20, it is possible to facilitate the operation of putting in and out the stored items.

  Furthermore, by sticking an airtight tape 30 made of aluminum on the outer surface of the fitting portion 9 (joint portion) of the heat insulating panel 3 constituting the internal cabinet 10, the internal cabinet 10 is made airtight, so that the outside air Can be prevented, and cold air leakage inside the cabinet can be prevented, and even if frost is generated, it can be easily and reliably removed.

DESCRIPTION OF SYMBOLS 1 Ultra-low temperature cool box 2,2A Gap part 3 Heat insulation panel 4 Recessed part 5 Protruding part 9 Fitting part (joint part)
DESCRIPTION OF SYMBOLS 10 Internal housing | casing body 10a-10d Side wall 11 Internal entrance 12 Internal door body 20 External storage body 20a-20d Side wall 21 External entrance 22 External door body 30 Airtight tape 31 Sealing material 40A, 40B Viewing window

Claims (6)

It is an ultra-low temperature cool box for freezing and storing stored items at ultra-low temperatures,
It consists of an external container that comes into contact with the outside air, and an internal container that is entirely installed inside the external container,
The outer casing and the inner casing are configured by fitting a concave portion and a convex portion, each of which has a plate-like heat insulating panel provided at an end portion of the heat insulating panel,
There is a gap between the outer container and the inner container,
The temperature of the gap is higher than the temperature in the internal chamber and is set to a freezing point lower than the outside air temperature,
An ultra-low temperature cool box characterized by that. In the ultra-low temperature cool box according to claim 1,
The ultra-low temperature cold storage box characterized in that the temperature in the internal container is set to -60 ° C or lower, and the temperature of the gap is set to -20 ° C or lower. In the ultra-low temperature cool box according to claim 1 or 2,
The internal storage body is formed in a substantially rectangular shape in plan view, and an internal door body is provided to be openable and closable at an internal entrance provided in one side wall.
The external storage body surrounds the internal storage body via a gap between three side walls other than the side wall having the internal entrance of the internal storage body, and on the outer side of the internal entrance, An external door is formed at an external doorway formed on the side wall in a direction perpendicular to the internal doorway in the side wall constituting the space for the storage and removal, which is formed leaving a space for the storage and removal of the stored material communicating with the space. It is provided so that it can be opened and closed.
An ultra-low temperature cool box characterized by that. In the ultra-low temperature cool box according to any one of claims 1 to 3,
A cryogenic cold insulation, characterized in that a viewing window is provided at a site where the side wall of the external storage body and the side wall of the internal storage body are opposed to each other so that the internal storage body can be seen from the outside of the external storage body. Warehouse. In the ultra-low temperature cool box according to claim 3,
A viewing window through which the internal container can be seen from the outside of the external container is provided at a portion of the external container opposite to the side wall orthogonal to the side wall having the external doorway and the side wall having the internal doorway. This is an ultra-low temperature refrigerator. In the ultra-low temperature cool box according to any one of claims 1 to 5,
An ultra-low temperature cool box, wherein an airtight tape made of aluminum is attached to an outer surface of a fitting portion of the heat insulating panel constituting the internal storage body.

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