JPH0814448B2 - Cold storage container - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a cold storage container used for cold storage of food or the like for a relatively short time, and in particular, to hold food or the like in a uniform temperature state by using 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, Japanese Patent Laid-Open No.
As shown in No. 119475, the inside of a heat insulating container is divided into an upper cold heat source storage chamber and a lower storage chamber, and both chambers are thermally connected by a plurality of heat pipes, and It is known that cold heat radiated from a cold heat source such as dry ice stored in the source storage chamber is transferred to the storage chamber through the heat pipe, and thus the storage chamber can be kept in a uniform temperature state. ing.

By the way, depending on the food, there are so-called frozen foods that are required to be maintained at an extremely low temperature such as below 10 degrees Celsius, and are required to be maintained at a relatively low temperature such as around 0 degrees Celsius. There are so-called refrigerated foods.

Problems to be Solved by the Invention However, the conventional cold storage container as described above is
Since the whole of the storage room was kept in a uniform cooling state, if multiple foods with different suitable cooling temperatures are stored at the same time, if the temperature inside the container is set to suit frozen foods, it will be refrigerated. In the case of food, the food will be in a supercooled state and its quality will be deteriorated. In the opposite case, the frozen food will be undercooled and its quality will be deteriorated.

Therefore, the conventional refrigerating container cannot handle the demand for simultaneously delivering two or more kinds of foods or the like having different cooling suitable temperatures.

The present invention has been made in view of the above problems,
An object of the present invention is to provide a cold storage container provided with a plurality of storage chambers having different cooling temperatures so that a plurality of types of foods having different cooling temperatures can be stored at the same time.

Therefore, according to the present invention, a plurality of storage chambers are provided in a container body having a cold heat source storage chamber on the inner upper side, and these storage chambers and the cold heat source storage chamber are operated. The heat pipes in which the working liquids having different temperature ranges are thermally connected to each other make it possible to set different temperatures in the respective storage chambers even though the same regenerator material is used.

That is, according to the present invention, the inside of the heat-insulating container body (1) having the cold heat source storage chamber (C) in the upper inner part is divided into a plurality of storage chambers (A) (B) by the heat-insulating partition wall (9). And a plurality of heat pipes (H1) (H2) each of which is filled with hydraulic fluids having different operating temperature ranges are provided in the container body (1), and the storage chambers (A) and (B) are provided.
For each of the heat pipes (H1) and (H2) in which different types of working fluid are enclosed, the evaporation parts (H1a) and (H2a) are arranged in a thermally connected state and the heat pipes (H1)
The gist of a cold insulation container is characterized in that both of the condensing parts (H1b) and (H2b) of (H2) are arranged in a thermally connected state in the cold heat source storage chamber (C).

Embodiments The present invention will be described based on the embodiments shown in FIGS. 1 to 3.

The cold storage container of the illustrated embodiment has an opening / closing door (2) attached to the opening surface of the container body (1), and is movable by a caster (3) attached to the lower end of the body (1). ing.

The container body (1) is composed of a heat-insulating peripheral wall 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). A heat pipe panel (P) made of metal is mounted in the container body (1).

This heat pipe panel (P) is shown in FIG. 1 and FIG.
As shown in the figure, it has one vertical wall portion (P1) and a horizontal wall portion (P2) that is bent from the upper end and is continuous,
The flat roll-shaped aluminum roll pond panel having excellent thermal conductivity is bent and formed in a substantially inverted L shape in a side view. The panel (P) is formed with two independent hollow circuit parts (4) (5) from the vertical wall part (P1) to the horizontal wall part (P2), and each hollow part (4) is formed. (5) The working fluid is enclosed under the source pressure to form the first heat pipe (H1) and the second heat pipe (H2).

As shown in FIG. 3, the first heat pipe (H1) has an evaporation part (4) formed by a hollow part (4) formed in a mesh or grid circuit in the lower half of the vertical wall (P1). H1a)
And a condensing section (H1b) (H1b) composed of hollow sections (4) formed in two mesh-like or lattice-like circuits at both ends of the horizontal wall section (P2), and the evaporating section is provided. (H1a) and the condensing part (H1b) (H1b) are connected by a plurality of linear hollow parts (H1c) provided along both ends of the panel (P).

On the other hand, the second heat pipe (H2) has an evaporation part (H2a) composed of hollow parts (5) formed in a mesh-like or grid-like circuit in the upper half of the vertical wall part (P1) and a horizontal wall. Department (P
2) Evaporator (H1b) (H1) of the first heat pipe (H1)
b) has a condensing part (H2b) composed of a hollow part (5) formed in a mesh-like or lattice-like circuit, and the evaporating part (H2a) and the condensing part (H2b) are plural. Are connected by a straight hollow part (H2c). This second
A large number of slits (6) are formed around the evaporation portion (H2a) of the heat pipe (H2) to reduce heat conduction with the evaporation portion (H1a) of the first heat pipe (H1). It is made to become.

The first heat pipe (H1) contains Freon 12 as a working fluid, while the second heat pipe (H2) contains Freon 114 as a working fluid.

The hydraulic fluid may be, for example, Freon 11, 22,
113, or a working fluid having a different working temperature range such as ammonia, methanol, or water may be appropriately selected and sealed.

The heat pipe panel (P) is mounted on the vertical wall portion (P1) of the heat pipe panel (P) along the inside of the rear wall of the container body (1), as shown in FIGS. 1 and 2.
An attachment plate (7) is arranged on the lower surface of the horizontal wall portion (P2), and a cold heat source storage chamber (C) is formed in the upper part of the container body (1). A lid (8) is provided at the front opening of the cold heat source storage chamber (C) such that the lower end of the lid (8) is pivotally supported by the attachment plate (7) and can be opened and closed to seal the inside of the storage chamber (C). The cold air from the cold heat source (D) stored inside does not leak outside.

In addition, a heat insulating partition wall (9) is arranged in the container body (1) so as to be located at the boundary between the evaporation parts (H1a) (H2a) of the heat pipes (H1) (H2). Thus, an upper storage chamber (A) and a lower storage chamber (B) are formed in the main body (1). Therefore, in each of the storage chambers (A) and (B), the evaporation portions (H1a) (H2a) of the first and second heat pipes (H1) (H2) are arranged in a thermally connected state. , Inside the cold heat source storage chamber (C), the condensing part (H1b) of both heat pipes (H1) (H2)
(H1b) and (H2b) are arranged in thermal connection.

In use, the cold insulation container (1) stores a cold heat source (D) such as dry ice in a cold heat source storage chamber (C) and a lid (8) as shown in FIGS. 1 and 2. Close,
In the lower storage room (B), the objects to be kept cold, such as foods, which are sufficient if kept at a relatively low temperature, are stored, while in the upper storage room (A), the objects to be kept at a relatively lower temperature than the above objects to be kept cold. Store the objects to be kept cold that must be kept in a state.

Then, the heat in the storage chambers (A) and (B) warms the evaporation portions (H1a) and (H2a) of the heat pipes (H1) and (H2), thereby causing evaporation of the working fluid inside. And
The generated vapor rapidly rises in each heat pipe (H1) (H2), releases latent heat of vaporization in each condensing part (H1b) (H2b) and is condensed, and each vaporizing part (H1a) ( H2a). Thus, the cold heat of the cold heat source (D) is rapidly transferred to the upper storage chamber (A) and the lower storage chamber (B) via each heat pipe (H1) (H2) and radiated. The insides of the two chambers (A) and (B) are cooled by the above, but the hydraulic fluid enclosed in the first heat pipe (H1) is better than the hydraulic fluid enclosed in the second heat pipe (H2). Also, since the operating temperature range is low, the temperature in the upper storage chamber (A) is kept relatively lower than that in the lower storage chamber (B).

When the upper storage room (A) is used as a freezing room having an extremely low internal temperature, the cold air from the cold heat source (D) may drop directly into the room (A). The attachment plate (7) and lid (8) as in the above embodiment may be omitted. However, in order to keep the internal temperatures of the upper storage chamber (A) and the lower storage chamber (B) different, it is necessary to prevent mutual heat from flowing in and out.

In the above embodiment, the container body (1) is provided with the upper and lower two-stage storage chambers (A) and (B), but three or more storage chambers may be provided above and below or left and right. Is also good.

Furthermore, the heat pipe panel (P) is most advantageous in terms of manufacturing and appearance design when it is made of a heat pipe using a roll bond panel as in the above-mentioned embodiment. Not limited to
Alternatively, for example, a pipe-on-sheet may be used, or a flat hollow extruded shape member may be used.

Further, as the heat pipes (H1) and (H2), it is advantageous in terms of heat transport efficiency to use the one integrally provided in the heat pipe panel (P) as in the above embodiment, but the rod-shaped heat pipe is used. May be used.

EFFECTS OF THE INVENTION As described above, in the cold insulation container according to the present invention, the inside of the heat-insulating container body (1) having the cold heat source storage chamber (C) in the upper inner part is protected by the heat-insulating partition wall (9). It is divided into a plurality of storage chambers (A) and (B), and a plurality of heat pipes (H1) and (H2) are installed in the container body (1), and the heat pipes (H1) and (H2) are evaporated. Department (H1
a) (H2a) is placed in a thermal connection in each of the storage chambers (A) and (B), and each of the condensing units (H1b) and (H2b) is heated in the cold heat source storage chamber (C). The cold heat from the cold heat source (D) housed in the cold heat source storage chamber (C) is transferred to the heat pipes (H1).
It is rapidly transferred into each of the storage chambers (A) and (B) via (H2), and the inside of each of the storage chambers (A) and (B) is efficiently cooled.

Moreover, each storage room (A) (B) and cold heat source storage room (C)
And are thermally communicated with each other by heat pipes (H1) and (H2) in which hydraulic fluids having different operating temperature ranges are enclosed, so that despite using the same cold heat source (D),
The temperature inside each storage chamber (A) and (B) can be maintained at different temperatures.

Therefore, even though it is a single cold storage container, several foods and drinks can be transported and stored at one time in a frozen state and the other in a refrigerated state, depending on their own proper storage temperature. It has an excellent practical effect that it can be served.

[Brief description of drawings]

The drawings 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, Fig. 2 is a vertical sectional view, and Fig. 3 is a heat pipe panel. It is a top view showing the state where it did. (1) …… Container body, (9) …… Partition wall, (A)
(B) ... storage room, (C) ... heat source storage room, (H1)
(H2) …… Heat pipe, (H1a) (H2a) …… Evaporation section,
(H1b) (H2b) …… Condensing part.

Claims (1)

[Claims] 1. The inside of a heat-insulating container body (1) having a cold heat source storage chamber (C) in the upper inner part thereof is divided into a plurality of storage chambers (A) and (B) by a heat-insulating partition wall (9). A plurality of heat pipes (H1) (H2), which are partitioned and filled with hydraulic fluids having different operating temperature ranges, are provided in the container body (1), and each of the storage chambers (A) and (B) is provided. Each of the heat pipes (H1) in which different types of hydraulic fluid are enclosed
The evaporation parts (H1a) and (H2a) of (H2) are arranged in thermal connection with each other, and the above heat pipes (H1) and (H2)
The cold insulation container is characterized in that both of the condensing parts (H1b) (H2b) are arranged in the cold heat source storage chamber (C) in a thermally connected state.