JPH0528444Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention is a cold roll box used to keep foods cold for a relatively short period of time, and in particular, uses a cold storage material such as dry ice as a cold heat source to store foods uniformly cooled. It relates to cold roll boxes used for shipping.

Conventional technology Conventionally, as this type of cold roll box,
For example, as shown in Japanese Patent Application Laid-Open No. 56-119475, the inside of an insulating container body is divided into an upper cold source storage chamber and a lower storage chamber, and both chambers are thermally isolated by heat pipes. and transferring cold heat from a cold heat source such as dry ice stored in the cold heat source storage chamber to the storage chamber via the heat pipe,
It is known that the inside of the storage chamber is kept uniformly cooled.

Problems that the invention aims to solve However, in the case of the conventional cold roll box described above, in actual use, the temperature inside the storage chamber tends to be several degrees higher at the top than at the bottom, especially when fully loaded. When items to be refrigerated are stored in a cold roll box, it is not possible to maintain them all at the desired storage temperature, and uniform cooling within the storage room, which is one of the important purposes of this type of cold roll box, is not always possible. It is difficult to say that this has been fully achieved.

In addition, this type of cold roll box is sometimes carried outdoors and used, especially when it is used in a place where the outside temperature is high and is exposed to direct sunlight, such as outdoors in the summer. However, the temperature of the refrigerated items increases, making it difficult to control the desired temperature of the items to be refrigerated.

This idea was developed to solve the above-mentioned problems, and it is possible to uniformly cool every corner of the storage room, and even when the outside temperature is high and there is direct sunlight, the storage room can be cooled evenly. The object of the present invention is to provide a cold roll box that has even better uniform cooling effects and can maintain the desired storage temperature at an appropriate temperature.

Means to Solve the Problems This idea is to install an electric fan inside the storage room and drive it with a solar battery to forcefully circulate the air inside the storage room. be.

That is, this invention is a cold roll box that is equipped with a heat pipe H that controls the transfer of cold heat into the storage chamber B and is movable by wheels 11 attached to the lower end. The gist of the cold roll box is that a solar cell 9 is attached to a part of the side surface, and an electric fan 10 is installed which uses the solar cell 9 as a power source and controls forced circulation of air in the storage chamber B. It is something.

Embodiment Hereinafter, this invention will be explained based on the embodiment shown in FIGS. 1 and 2.

In the cold roll box of the illustrated embodiment, the inside of the box body 1 is airtightly partitioned by a partition wall 4 into a cold source storage chamber A at the rear of the upper part and a storage chamber B at the lower part. It is thermally connected by a pipe H and is equipped with an electric fan 10 powered by a solar cell 9.
The main body 1 is movable by wheels (casters) 11 attached to the lower end thereof.

The box body 1 includes an enclosing box body 2 with an open front and a peripheral wall having heat insulating properties filled with a heat insulating material 2c such as foamed polyurethane synthetic resin between an interior wall board 2a and an exterior wall board 2b; It consists of a heat insulating opening/closing door 3 attached to the opening surface.

At the rear upper part of the box body 1, there is a bottom wall part 4a which is inclined downward toward the rear wall side, and a vertical wall part 4 which is continuously bent upward from the front end of the bottom wall part 4a.
A heat-insulating partition wall 4 having a substantially L-shape in side view and consisting of b.
is fixed. The interior of the main body 1 is divided by this partition wall 4 into a cold source storage chamber A for storing a cold source D such as dry ice, and a cold source storage chamber A for storing a cold source D such as dry ice, and a cold source storage chamber A for storing a cold source C such as food below. and storage chamber B are formed so as to be airtight with each other.

Both chambers A and B are thermally connected by a heat pipe H. This heat pipe H
The vertical wall portion P1 has a size corresponding to the rear wall surface of the storage room B, and the bottom wall portion 4 of the partition wall 4 is bent and continuous from the upper end of the wall portion P1 and is set at a slightly upward slope.
It is integrally provided on a flat plate-shaped aluminum single-sided expansion tube roll bond panel P with excellent thermal conductivity, which is bent into a substantially inverted L-shape when viewed from the side and is formed by a top wall portion P2 having a size corresponding to that of a. It is something that is made possible. This panel P has a hollow part 5 formed in a continuous mesh or lattice-like circuit from the vertical wall part P1 to the upper wall part P2, and a working fluid is sealed in the hollow part 5 under reduced pressure. A heat pipe H is formed. The circuit formed on the vertical wall portion P1 of this panel P constitutes the evaporation portion H1, while the circuit formed on the upper wall portion P2 constitutes the condensation portion H2.

As shown in FIGS. 1 and 2, this panel P has a vertical wall portion P1 disposed on the inner side of the rear wall of the storage chamber B, and an upper wall portion P2 at the bottom of the cold source storage chamber A. It is placed on the top of the wall.

The cold/heat source storage chamber A is directly communicated with the outside via an opening 6 formed in the upper part of the rear wall of the box body 1, and a heat insulating opening/closing door 7 is attached to this opening 6 so as to be openable and closable. It is being

On the other hand, a solar cell 9 is attached to the upper surface of the ceiling wall 8 of the box body 1 over the entire surface thereof. An electric fan 10 powered by the solar cell 9 is fixed to the inner peripheral surface of the ceiling wall 8 so as to be located between the vertical wall 4b of the partition wall 4 and the opening/closing door 3. Therefore, this electric fan 10 does not rotate at night when no light can be irradiated to the solar cell 9, but it rotates at a low speed in a place where there is no direct sunlight but a certain amount of light can be obtained. It is designed to be Therefore, when exposed to direct sunlight outdoors, the solar cell 9 generates a large electromotive force and rotates at a high speed.

In the figure, 12 is a thermometer operated by a solar cell 9.

When used in the same way as conventional products, this cold roll box stores a cold source D such as dry ice in the cold source storage chamber A and stores it in the storage chamber B, as shown in FIGS. Stores objects C to be kept cold such as food.

Then, the cold energy from the cold source D is rapidly transferred into the storage room B via the heat pipe H.
When this cold roll box is used in a place where there is no direct sunlight but a certain amount of light irradiation, such as indoors, the electric fan 10 is rotated at a low speed to air the air in the storage room B. Since the air is forcedly circulated, the inside of the chamber B is cooled evenly and uniformly throughout the room. On the other hand, if this cold roll box is taken outside where it is exposed to direct sunlight, for example, and the solar cells 9 are exposed to strong direct sunlight, the electric fan 10 will be rotated at a high speed, and the air circulation in the storage room B will be further improved. It will be done soon. Therefore, the heat exchange efficiency of the heat pipe H is further improved,
The transfer of cold heat into the storage room B is increased, and the temperature rise in the room is suppressed.

Note that as a power source for the electric fan 10, it is not always necessary to use only the solar cell 9 as in the above embodiment. The electric fan may be made to rotate reliably even when there is no direct sunlight, and may also be able to rotate at a higher speed when it is exposed to direct sunlight. Further, a plurality of electric fans 10 may be attached or may be attached at other locations.

In addition, it is advantageous in terms of solar energy absorption efficiency and external design that the solar cell 9 be placed along the outer peripheral surface of the ceiling wall 8 of the box body 1 as in the above embodiment. The present invention is not limited to this, and it may be attached to any other location, and the means for attaching it is also not limited.

Furthermore, as for the heat pipe H, it is most advantageous in terms of manufacturing and appearance design to construct it as a heat pipe panel as in the above embodiment, but it is not limited to this, and other methods may also be used. For example, a pipe-on-sheet may be used, or a rod-shaped heat pipe may be used.

Effects of the invention As described above, the cold roll box according to this invention is equipped with the heat pipe H that controls the transfer of cold heat into the storage room B,
The cold heat is rapidly transferred into the storage chamber B through the heat pipe H, and the inside of the storage chamber B is efficiently cooled.

Moreover, a solar cell 9 is attached to a part of the outer surface of the box body 1, and an electric fan 10 is installed which uses this as a power source and controls the forced circulation of air in the storage chamber B. Due to the forced circulation of air, the inside of the storage room B is uniformly cooled to every corner, and even when the storage room B is full of objects C, it is possible not only to maintain them all at the desired storage temperature, but also to maintain the storage room B at the desired temperature. Since the heat exchange efficiency of the heat pipe H is improved by air circulation, temperature changes in the storage room B due to changes in outside temperature can be reduced.

Furthermore, since the solar battery 9 is used as a power source for driving the electric fan 10, there is no need to stop the operation due to battery exhaustion, and there is no running cost, making it economical. Furthermore, since the electric fan 10 is driven by the solar cell 9, the rotation speed of the electric fan 10 can be automatically changed according to the intensity of light to the solar cell 9, so it is possible to change the number of revolutions of the electric fan 10 automatically depending on the intensity of light to the solar cell 9. When the outside temperature is high and the storage room B is transported to a place exposed to direct sunlight, the electric fan 10 is rotated at a high speed to suppress the temperature rise inside the storage room B. Also, when the storage room B is not exposed to light, such as at night, the electric fan 10 is rotated at a high speed. In this case, the electric fan 10 can be automatically stopped to prevent the temperature from dropping too much.

[Brief explanation of the drawing]

FIGS. 1 and 2 show an embodiment of this invention, with FIG. 1 being a partially cutaway overall perspective view showing the opening/closing door in an open state, and FIG. 2 being a longitudinal sectional view. 1...Box body, 8...Ceiling wall, 9...Solar battery, 10...Electric fan, 11...Wheels (casters), B...Storage room, H...Heat pipe.

Claims (1)

[Claims for Utility Model Registration] (1) In a cold roll box equipped with a heat pipe H for controlling the transfer of cold heat into the storage room B, and made movable by wheels 11 attached to the lower end, A solar cell 9 is attached to a part of the outer surface of the box body 1.
The cold roll box is characterized in that it is equipped with an electric fan 10 which uses the electric fan 10 as a power source to control forced circulation of air in the storage chamber B. (2) The cold roll box according to claim 1, wherein the solar cell 9 is attached to the outer surface of the ceiling wall 8 of the container body 1.