JPH0629643Y2 - Cold storage container - Google Patents

Description

[Detailed Description of the Invention] Field of Industrial Application This invention is to keep foods etc. in a uniform temperature state by using a cold storage container used for keeping foods etc. in a relatively short time, especially a cold storage material such as dry ice as a cold heat source. For example, the present invention relates to a cold storage container used for shipping as a cold roll box.

2. Description of the Related Art Conventionally, as a cold-storage container of this type, for example, JP-A-56
The type as shown in Japanese Patent Laid-Open No. 119475 is known.

That is, in this cold storage container, the inside of the container body is partitioned by a partition wall, a cold heat source storage chamber for storing a cold heat source such as dry ice is provided in the upper part, and a cold object such as food is stored in the lower part. A storage chamber is provided, and both chambers are thermally connected by a heat pipe.

On the upper surface of the bottom wall of the cold heat source storage chamber, the condensing part of the heat pipe is arranged, and by storing the cold heat source such as dry ice in the cold heat source storage chamber, the cold heat passes through the heat pipe. It is designed to be efficiently transferred to the storage room.

Problems to be Solved by the Invention Such a cold-storage container is designed in advance so that the temperature inside the storage chamber becomes a predetermined temperature, and naturally the temperature cannot be appropriately adjusted according to the object to be cooled. For this reason, it is uneconomical to use a container according to each of the objects to be kept that have different storage temperatures.

Also, this type of container is designed under the condition that the outside temperature is constant, but in reality, the outside temperature fluctuates greatly throughout the year, and the outside wall temperature of the container causes the outside temperature to fluctuate. The amount of heat that penetrates into the fluctuates. Therefore, for example, in the one designed for the summer when the outside temperature is high, in the winter, the amount of heat entering from the outside decreases due to the decrease in the outside temperature, and as a result, the temperature in the storage room is much lower than the desired set temperature, It becomes a supercooled state, which causes freezing of the cooled object. On the other hand, in the case of the one designed for winter when the outside temperature is low, there is a disadvantage that the temperature of the storage room becomes too high in the summer when the outside temperature is high and the quality of the object to be cooled deteriorates.

On the other hand, in order to avoid such an inconvenience, a valve mechanism is provided in the communication circuit between the condensing section and the evaporating section of the heat pipe to adjust the reflux amount of the working fluid, and the temperature in the storage chamber can be arbitrarily controlled by this valve operation. However, it is difficult to control the temperature by adjusting the valve, and the hydraulic fluid leaks from the valve due to vibration, shock, etc. The heat pipe has various difficulties such as the possibility of malfunctioning and is not in practical use at present.

The present invention has been made in order to solve the above-mentioned problems, and an object thereof is to provide a simple cold-storage container having a structure in which the temperature in the storage chamber can be arbitrarily changed.

MEANS FOR SOLVING THE PROBLEMS Thus, the present invention provides a heat insulating laying material slidably arranged on the condensing portion of the heat pipe arranged on the upper surface of the bottom wall of the cold heat source storage chamber. The temperature inside the storage chamber is controlled by adjusting the area of the condensing part of the heat pipe that the cold heat source is in direct contact with.

That is, the present invention has a cold heat source storage room (A) and a storage room (B).
And a heat pipe (H) for thermally connecting the two chambers (A) and (B) to each other, wherein the bottom wall portion (3a) of the cold heat source storage chamber (A) is an upper surface. The heat insulating container (7) is slidably arranged on the condensing part (H2) of the heat pipe (H) arranged in the above.

Action By sliding the heat insulating floor plate (7) to change the direct contact area between the condensing part (H2) of the heat pipe (H) and the cold heat source (D), the cold heat source (D) moves to the condensing part (H).
It is possible to control the conduction of cold heat to 2). Accordingly, the amount of cold heat transferred to the inside of the storage chamber (B) via the heat pipe (H) is also controlled accordingly, and thus the inside of the storage chamber (B) is set to a predetermined temperature.

Embodiment Hereinafter, the invention will be described based on illustrated embodiments.

In the cold storage container of the embodiment shown in FIGS. 1 to 5, the inside of the container body (1) is hermetically partitioned into a cold heat source storage chamber (A) at the upper rear and a storage chamber (B) at the lower part. The two chambers (A) and (B) are thermally connected by a heat pipe (H), and are movable by a caster (8) attached to the lower end of the main body (1).

The container body (1) includes an inner wall plate (1a) and an outer wall plate (1a).
It is composed of a peripheral wall having a heat insulating property, which is filled with a heat insulating material (1c) such as foamed polyurethane synthetic resin between it and b). The front surface of the container body (1) is open, and a heat-insulating open / close door (2) having the same structure as the body (1) is attached to the opening surface.

Above the rear part of the container body (1), there are a bottom wall part (3a) inclined downward toward the rear wall side and a vertical wall part (3b) continuously bent upward from its front end. An adiabatic partition wall (3) having a substantially L-shape in side view is fixed.
Thus, the partition wall (3) partitions the inside of the main body (1) to store a cold heat source (D) for storing a cold heat source (D) such as dry ice, and below the cold heat source storage chamber (A). The storage room (B) for accommodating the object to be cooled (C) is formed to be hermetically sealed to each other.

And these two chambers (A) and (B) are heat pipes (H)
Are thermally connected by. This heat pipe (H)
Is a vertical wall of a size corresponding to the rear wall of the storage room (B)
(P1) and an upper surface wall portion (P2) of a size corresponding to the bottom wall portion (3a) of the partition wall (3), which is bent from the upper end of the wall portion (P1) and is set to be continuous and have a slightly rising slope. ) Is formed integrally with a flat-faced aluminum single-sided expansion roll bond panel (P) made of aluminum and bent in an inverted L shape in a side view and excellent in thermal conductivity. As shown in FIG. 3, the panel (P) has hollow portions formed in a mesh-like or lattice-like circuit continuous from the vertical wall portion (P1) to approximately half the upper wall portion (P2). (4) is formed, and the working liquid is sealed in the hollow portion (4) under reduced pressure to form the heat pipe (H). The circuit formed on the vertical wall portion (P1) of this panel (P) constitutes the evaporation portion (H1), while the circuit formed on the top wall portion (P2) constitutes the condensation portion (H2). is there.

As shown in FIG. 1 and FIG. 3, in the evaporation section (H1), the circuit pattern density of the upper half circuit is set to be higher than that of the lower half circuit, and conventionally, the temperature is high. The upper part of the storage chamber (B), which tends to be the same, can be cooled more efficiently, so that the inside of the storage chamber (B) can be uniformly cooled.

As shown in FIGS. 1 and 2, the panel (P) has a vertical wall portion (P1) disposed on the inner surface of the rear wall of the storage chamber (B) and an upper surface wall portion (P2). Is arranged on the bottom wall portion (3a) of the cold heat source storage chamber (A), that is, on the upper surface of the bottom wall portion (3a) of the partition wall (3).

The cold heat source storage chamber (A) is directly communicated with the outside through an opening (5) formed in the upper part of the rear wall of the container body (1), and the opening (5) has a heat insulating property. An opening / closing door (6) is attached so as to be openable and closable.

On the other hand, on the bottom surface of the cold heat source storage chamber (A), a heat insulating floor plate (7) is slidably arranged, and by sliding the heat insulating floor plate (7), the exposed area of the condensing part (H2), in other words, cold heat The area of direct contact between the source (D) and the condenser (H2) can be changed arbitrarily.

The floor plate (7) is, as shown in FIGS. 3 and 4,
It is composed of a heat insulating plate material made of, for example, foamed synthetic resin or the like, the dimension of which is smaller in the front-back direction than the bottom surface of the cold heat source storage chamber (A), that is, the upper wall portion (P2) of the roll bond panel (P). And a rectangular cutout (7a) on one side
Are formed. This notch is for ensuring the minimum direct contact area between the cold heat source (D) and the condensing part (H2) even when the floor plate (7) is closest to the rear wall side of the container body (1). However, the size may be appropriately set depending on the material and thickness of the floor plate (7) used. For example, as shown in FIG. 4, the notch (7a) side is closest to the rear wall side of the container body (1), and the notch (7a)
In the state where the cold heat source (D) such as dry ice is directly contacted over the entire surface of the condensing part (H2) exposed through the storage room (B) at the average outside temperature in spring or autumn. It is preferable to set the size such that the inside of () is about 0 ° C. ± 3 ° C.

This cold storage container is shown in Figs.
As shown in the drawing, a cold heat source (D) such as dry ice is stored in the cold heat source storage chamber (A), and a cold storage object (C) such as food is stored in the storage chamber (B).

At this time, since the heat insulating floor plate (7) is disposed on the condensing part (H2), the exposed area, that is, the area of the condensing part (H2) with which the cold heat source (D) is directly contacted is determined. Therefore, the amount of cold heat transferred from the cold heat source (D) to the condenser (H2) is limited, and thus the amount of cold heat transferred to the storage chamber (B) is also limited.

Therefore, when the outside air temperature is high as in summer, as shown in FIGS. 5 (a) and 5 (b), the floor plate (7) is slid to the front side of the container body (1) to cool and cool the heat source (D). And condensation section
If the direct contact area with (H2) is increased, the amount of cold heat transfer into the storage chamber (B) is increased, so that the inside of the chamber (B) can be efficiently cooled and a predetermined temperature can be set. It is possible.

On the other hand, when the outside air temperature is low as in the winter season, as shown in FIGS. 5 (c) and 5 (d), the floor plate (7) is arranged so as to be inverted and the rear wall of the container body (1) is arranged. The amount of cold heat transferred into the storage chamber (B) is reduced by eliminating the direct contact area closest to the side or setting it to a small value, thereby preventing overcooling of the chamber (B). The temperature can be set to a desired temperature.

The invention of the present application is not limited to the above-described embodiment, and in short, a heat insulating floor plate (a heat-insulating floor plate capable of arbitrarily adjusting the direct contact area between the cold heat source (D) and the condensing part (H2) of the heat pipe (H) ( As long as 7) is slidably arranged on the bottom surface of the cold heat source storage chamber (A), other arbitrary design changes can be allowed. For example, as a heat insulating floorboard,
It is also possible to use one that does not have the cutout portion (7a) as in the above embodiment, and in this case as well, the direct contact area can be adjusted in the same manner as described above, and the amount of cold heat transfer into the storage chamber (B) can be adjusted. It can be adjusted arbitrarily.

Further, as the heat pipe (H), it is most advantageous in terms of manufacturing and appearance design that it is configured by a heat pipe panel as in the above embodiment, but it is not limited to this, and other For example, a pipe-on-sheet may be used, or a rod-shaped heat pipe (H) may be used.

Effect of the Invention The cold storage container according to the present invention comprises a cold heat source storage chamber (A) and a storage chamber (B), and a heat pipe (H) for thermally connecting both chambers (A) and (B). Since it is equipped, the cold heat from the cold heat source (D) stored in the cold heat source storage chamber (A) is rapidly transferred to the storage chamber (B) through the heat pipe (H), The inside of the chamber (B) is efficiently cooled.

A heat insulating floor plate (7) is slidably disposed on the condensing portion (H2) of the heat pipe (H) disposed on the upper surface of the bottom wall portion (3a) of the cold heat source storage chamber (A). Therefore, by sliding the floor plate (7) to change the direct contact area between the condenser (H2) and the cold heat source (D), the conduction of cold heat from the cold heat source (D) to the condenser (H2) is conducted. The amount of cold heat transferred to the storage chamber (B) through the heat pipe (H) can be controlled as desired. Therefore, the temperature in the storage chamber (B) can be set to a desired temperature, and the temperature in the storage chamber (B) can be kept constant throughout the year.
Therefore, each time a cold storage object with a different suitable storage temperature is transported or stored, or each time the outside air temperature is different, there is no need for a container suitable for each case as in the conventional case.
It is economical because only one container is needed.

In addition, since the temperature control is performed by the heat insulating floor plate (7) arranged on the condensing part (H2) of the heat pipe (H) as described above, the structure is simple and the manufacturing cost is increased. There is no fear of failure.

Furthermore, the temperature control operation is simply performed by the heat insulating floor plate (7).
Since it is simply slid, it can be performed extremely easily and surely.

[Brief description of drawings]

1 to 5 show an embodiment of the present invention. FIG. 1 is a partially cutaway perspective view showing a state in which an opening / closing door is opened, and FIG. 2 is a state in which the opening / closing door is closed. Figure 1 II
-II is a cross-sectional view of the line, FIG. 3 is an overall perspective view showing a state in which a heat insulating floor plate is arranged on the condensing part of the heat pipe panel, FIG.
FIG. 4 is a sectional view taken along line IV-IV in FIG. 2, and FIG. 5 is an explanatory view showing a sliding operation of the heat insulating floor plate. (A) ... Cold heat source storage room, (B) ... Storage room, (D) ... Cold heat source, (H) ... Heat pipe, (H2) ... Condensing part, (3a) ... Bottom wall part, (7) ... Thermal insulation Sex floor.

Claims (1)

[Scope of utility model registration request] 1. A cold insulation container comprising a cold heat source storage chamber (A) and a storage chamber (B), and equipped with a heat pipe (H) for thermally connecting these chambers (A) and (B). The heat insulating floor plate (7) is slidably disposed on the condensing portion (H2) of the heat pipe (H) disposed on the upper surface of the bottom wall portion (3a) of the cold heat source storage chamber (A). Cold storage container characterized by being kept.