JPH0636455Y2 - Cold storage container - Google Patents

Description

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

2. Description of the Related Art Conventionally, as a cold storage container of this type, for example, Japanese Patent Laid-Open No.
As shown in Japanese Patent No. 119475, the inside of a heat-insulating container body is divided into an upper cold heat source storage chamber and a lower storage chamber, and both chambers are thermally connected by a rod-shaped heat pipe,
It is known that the cold heat from the cold heat source such as dry ice stored in the cold heat source storage chamber is transferred to the storage chamber through the heat pipe, and thus the storage chamber is kept in a uniform temperature state. There is.

Problems to be Solved by the Invention However, in the case of the conventional cold-storage container as described above, the temperature inside the storage chamber tends to be about 7 to 10 ° C. higher in the upper portion than in the bottom portion in the actual use state. It was hard to say that uniform cooling in the storage room, which is one of the important purposes of the cold storage container of the species, has been achieved sufficiently. Therefore, there is an inconvenience that the article temperature of the object to be cooled cannot be properly controlled.

The present invention has been made in order to solve the above-mentioned inconvenience, and an object thereof is to provide a cold container having an excellent uniform cooling effect in a storage chamber.

Means for Solving the Problems Thus, the present invention proposes that the heat is arranged in the storage chamber in order to uniformly cool the whole by efficiently cooling the upper side of the storage chamber where the temperature tends to rise. The surface area of the evaporation portion of the pipe is set to be larger toward the upper side.

That is, the present invention relates to a cold insulation container comprising a cold heat source storage chamber and a storage chamber and equipped with a heat pipe for thermally connecting these chambers to each other. A heat pipe is integrally provided on a metal panel, which is bent in an inverted L shape in a side view and is formed of an upper wall portion, and a vertical wall portion of the panel is disposed on an inner side surface of a side wall of a storage chamber. At the same time, the upper surface wall portion is arranged on the upper surface of the bottom wall of the cold heat source storage chamber, and the surface area of the heat pipe provided on the vertical wall portion is gradually set to increase from the bottom portion to the upper portion of the storage chamber. The feature is the characteristic cold storage container.

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

The cold storage container of the embodiment shown in FIG. 1 to FIG. 3 is provided with a cold heat source storage chamber (A) in the upper part and a storage chamber (B) in the lower part in the container body (1), and both these chambers ( A)
(B) is thermally connected by a heat pipe (H), and is movable by a caster (7) attached to the lower part of the main body (1).

The container body (1) is composed of a peripheral wall having a heat insulating property in which a heat insulating material (1c) such as foamed polyurethane synthetic resin is filled between an inner wall plate (1a) and an outer wall plate (1b). The front of this container body (1) is open,
A heat-insulating open / close door (3) having the same structure as the main body (1) is attached to the opening surface.

A front opening-shaped enclosing box body (2) that constitutes the cold heat source storage chamber (A) is fixed above the rear part of the container body (1), and an opening / closing door (4) is attached to the opening surface. ing. The bottom wall portion (2a) of the surrounding box body (2) is inclined downward from the front side to the rear side of the container body (1). Then, the inside of the main body (1) is partitioned by the box body (2), and a cold heat source storage chamber (A) for storing a cold heat source (D) such as dry ice and a storage chamber (B) therebelow. ) And are provided.

The cold heat source storage chamber (A) and the storage chamber (B) are thermally connected by a heat pipe (H).

This heat pipe (H) has a vertical wall portion (P1) having a size substantially corresponding to the rear wall surface of the storage chamber (B) and an upper surface wall portion (P2) which is bent from the upper end of the vertical wall portion (P1) and which is continuous and has a slight upward slope. ) Is formed integrally with a flat plate-shaped aluminum double-sided expansion tube roll bond panel (P) which is bent in an inverted L shape in a side view and is excellent in thermal conductivity. This panel (P) has a vertical wall (P1) to a top wall (P2)
A hollow portion (5) formed in a continuous mesh-like or grid-like circuit is formed in the inside of the hollow portion, and the working liquid is enclosed in the hollow portion (5) under reduced pressure to form a heat pipe (H). . The heat pipe circuit formed on the vertical wall portion (P1) is gradually and densely formed from the lower end side to the upper side. This panel (P), as shown in FIGS. 1 and 2,
The vertical wall portion (P1) is arranged on the inner surface of the rear wall of the storage chamber (B) in a spaced state via a spacing member (6), and the upper wall portion (P2) is the cold heat source storage chamber (A). ) Is arranged and fixed so as to be fitted into a concave portion (2b) formed on the upper surface of the bottom wall portion. The heat pipe circuit formed on the vertical wall portion (P1) constitutes the evaporation portion (H1), and the upper surface wall portion (P2)
The heat pipe circuit formed in the above constitutes the condensing part (H2). Thus, the surface area of the evaporation part (H1) of the heat pipe (H) is gradually increased from the bottom to the top in the storage chamber (B).

As shown in FIG. 1 and FIG. 2, this cold storage container stores a cold heat source (D) such as dry ice in a cold heat source storage chamber (A) and keeps it cold when stored in a storage chamber (B). Store the item (C).

Then, the cold heat from the cold heat source (D) is transferred to the heat pipe (H).
Is rapidly transferred into the storage room (B) via the
The inside is cooled rapidly.

However, the circuit pattern that constitutes the evaporation part (H1) of the heat pipe (H) arranged so as to face the storage chamber (B) is
As described above, the upper side is more densely formed. In other words, the surface area of the evaporation part (H1) of the heat pipe (H) arranged so as to face the inside of the storage chamber (B) is gradually increased from the bottom to the top of the storage chamber (B). . Therefore,
Cold heat transfer efficiency is improved toward the upper side in the storage room (B),
More cold is transferred. Therefore, the upper part of the storage chamber (B), which has been apt to have a high temperature in the past, is cooled more efficiently, and the entire storage chamber (B) can be cooled more uniformly.

The density change of the circuit pattern of the evaporation part (H1), that is, the change of the surface area of the evaporation part (H1) does not necessarily have to be continuous, but changes stepwise over a plurality of stages. Is also good.

Further, the bottom wall portion (2a) of the cold heat source storage chamber (A) is set to be inclined, and the heat pipe panel (P) is provided on the upper surface thereof.
Is provided, the working fluid condensed in the condensing portion (H2) of the heat pipe (H) is smoothly recirculated, and the heat pipe (H) is operated well. Therefore, it is desirable that the inclination angle of the bottom wall portion (2a) of the cold heat source storage chamber (A) is set to at least 3 degrees or more.

Further, since the cold heat source storage chamber (A) can be made airtight by closing the opening / closing door (4) thereof, even when dry ice is used as the cold heat source (D), carbon dioxide which is vaporized gas thereof is used. The gas is surely prevented from entering the storage chamber (B), and the quality of fresh food and the like is not deteriorated.

As the heat pipe (H), it is most advantageous in terms of efficiency, manufacturing, and appearance design to be configured by a heat pipe panel as in the above embodiment, but it is not limited to this. . Alternatively, for example, a rod-shaped heat pipe, a pipe-on-sheet, or a flat hollow extruded shape member may be used.

In short, if the surface area of the evaporation part of the heat pipe facing the storage chamber is gradually set from the bottom to the top of the storage chamber, other arbitrary design changes are allowed. It is possible.

Effect of the Invention As described above, the cold storage container according to the present invention comprises the cold heat source storage chamber and the storage chamber, and is equipped with the heat pipes that thermally connect these chambers. Cold heat from the cold heat source housed in the source housing chamber is rapidly transferred into the storage chamber through the heat pipe as in the conventional product, and the room is efficiently cooled. Moreover, since the heat pipe is integrally provided on the metal panel, the storage chamber can be efficiently and uniformly cooled from the entire surface of the panel arranged in the chamber.

Further, since the surface area of the heat pipe arranged so as to face the storage chamber is set to be gradually larger from the bottom to the top of the chamber, the upper side of the storage chamber where the temperature tends to be higher has a lower temperature. The transfer amount becomes large, and the cooling is performed more efficiently. Therefore, the temperature difference between the upper part and the lower part in the storage chamber can be almost eliminated, the uniform cooling effect is excellent, and the excellent practical effect that the temperature control of the article to be kept cold can be more appropriately performed is achieved.

[Brief description of drawings]

FIG. 1 shows 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 sectional view taken along line II-II of FIG. The figure is an overall perspective view of the heat pipe panel. (A) ... Cold heat source storage room, (B) ... Storage room, (H) ...
… Heat pipe, (H1) …… Evaporator, (P) …… Panel, (P1) …… Vertical wall, (P2) …… Top wall.

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). At the heat pipe (H) ) Is integrally provided, the vertical wall portion (P1) of the panel (P) is disposed on the inner side surface of the side wall of the storage chamber (B), and the upper surface wall portion (P1) is formed.
2) is disposed on the upper surface of the bottom wall of the cold heat source storage chamber (A), and the surface area of the heat pipe (H) provided on the vertical wall portion (P1) increases from the bottom to the top of the storage chamber (B). A cool container characterized by being gradually set to a large size.