JPH083904Y2 - Cold storage refrigerator - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cold storage type refrigerator / refrigerator which can be used as, for example, a general-purpose or commercial refrigerator / freezer, a container for low temperature physical distribution, a rolling box for low temperature physical distribution, a container for transporting blood, medicines and the like.

[0002]

2. Description of the Related Art Conventionally, a cold storage type refrigerator / freezer of this type has a box-shaped main body having an openable / closable door on at least one surface thereof, a cold storage agent container filled with a cold storage agent, a compressor, a condenser,
A refrigeration system including a decompressor, an evaporator, and the like are provided, and by cooling the regenerator container by the evaporator, it is possible to freeze and hold the cooled object stored in the space inside the box-shaped body. Such a cold storage type refrigerator / freezer is disclosed in, for example, Japanese Patent Laid-Open No.
It is disclosed in Japanese Patent Publication No. 2-84279.

FIG. 4 (A) is a side view showing a mounting structure of a rectangular regenerator container 1 in a conventional regenerator / freezer, and FIG. 4 (B) is a regenerator container 1 shown in FIG. 4 (B).
Is an enlarged view of a broken line area portion E.

As shown in the figure, the cool storage agent container 1 is filled with the cool storage agent 2 so that an air layer A is secured in the upper part in consideration of the freezing and expansion of the cool storage agent 2. The regenerator container 1 is attached to the box-shaped main body 100 of the regenerator / freezer-refrigerator with one flat wall surface portion (first wall surface portion) 1c in contact with the inner surface of the inner box 8. Inner box 8 and outer box 5 of box-shaped body 100
A plurality of cooling pipes 3 serving as an evaporator of the refrigeration system and a heat insulating material 4 are housed between and. In addition, the central portions of the upper and lower side wall portions connecting between the first wall surface portion 1c of the cold storage agent container 1 and the wall surface portion (second wall surface portion) 1b facing the first wall surface portion 1c are respectively shown in FIG. As shown in the drawing, a thin portion 1a is formed as a joining portion described later.

When the cool storage agent 2 is cooled in the cool storage agent container 1 having such a structure, as shown in FIG.
As shown in (A), the freezing of the regenerator 2 progresses along the isothermal line T from the first wall surface portion 1c to the second wall surface portion 1b. Finally, the cold storage agent 2 freezes and expands at the bottom of the cold storage agent container 1 shown in FIG. 4 (B). As a result, the internal pressure of the cold storage agent container 1 rises, especially at the bottom, and the cold storage agent container 1 has a thin portion 1
Cracking is likely to occur at a. Therefore, in a general cold storage type refrigerator / freezer, the load strength of the cold storage agent container 1 is increased by increasing the wall thickness of the cold storage agent container 1 and increasing the thickness of the minimum thin portion (thin portion 1a). To prevent damage.

[0006] As another example of measures to prevent damage to the regenerator container by another method, the above-mentioned JP-A-62-8427 is known.
The cold storage type refrigerator for vehicles disclosed in Japanese Patent No. 9 is cited. In this vehicle cold storage refrigerator, a gas (inert gas) having a volume exceeding the volume expansion amount of the cold storage agent is enclosed in the cold storage agent container to ensure the sealability of the cold storage agent.

[0007]

If the wall thickness is increased as a measure for preventing damage to the regenerator container 1, the heat conductivity is reduced, the cooling function is reduced, and the regenerator-type refrigerator / refrigerator is reduced in weight. Contrary to the current situation in which the demand is made, not only is it inevitable to increase the weight of the cold storage agent container 1, but also the cost is increased.

Also, when the volume of the inert gas that exceeds the volume expansion amount of the cold storage agent is filled in the cold storage agent container, it is necessary to accurately grasp the volume expansion of the cold storage agent before filling a proper amount of the inert gas. I have to. Therefore, the current situation is that the disadvantage of productivity cannot be denied because the gas filling process is complicated also for the measure to prevent the regenerator container from being damaged by the filling of the inert gas.

The present invention has been made to solve the above problems, and its technical problem is to provide a regenerator refrigerator having a regenerator container which is excellent in durability and can be manufactured at low cost. is there.

[0010]

According to the present invention, there is provided a regenerator refrigerator having a regenerator container filled with a regenerator and an evaporator for cooling the regenerator container. A cold storage refrigerator / freezer having a soft material for absorbing freezing and expansion of the cold storage agent generated at the time of cooling by the evaporator is obtained at the bottom of the inside.

Further, according to the present invention, in a regenerator type refrigerator having a regenerator container filled with a regenerator, and an evaporator for cooling the regenerator container, the regenerator container is provided with: A cold storage refrigerator / freezer having a freezing temperature lower than that of the cold storage agent and filled with an antifreezing agent having a specific gravity higher than that of the cold storage agent can be obtained.

[0012]

The cold storage type refrigerator / freezer of the present invention will be described in detail below with reference to the accompanying drawings. The cold-storage refrigerator / freezer shown in FIG. 1 has a box-shaped main body 100 as a base body, and an openable door (not shown) is provided on one surface of the box-shaped main body 100. The box-shaped main body 100 has an outer box 5, an inner box 8 and a heat insulating material 4 arranged between them. In the box-shaped main body 100, the cool storage agent container 1 filled with the cool storage agent 2 is arranged. Further, the box-shaped main body 100 is provided with a refrigeration system including a compressor, a condenser, a decompressor, an evaporator, and the like, as in the conventional case.

FIG. 2 is a side view showing an essential part of a cold storage type refrigerator / freezer according to an embodiment of the present invention. Here, the regenerator container 1 is included, and only the evaporator is shown as the cooling pipe 3. The cold storage agent container 1 has a rectangular shape, and one wall surface portion (first wall surface portion) 1c thereof has a planar shape and is in contact with the vertical inner surface of the inner box 8 of the box-shaped main body 100. Further, the second wall surface portion 1b facing the first wall surface portion 1c is also formed in a flat plate shape. A soft material 21 is filled in the bottom of the cool storage agent container 1. This soft material 2
1 covers the thin portion 1a at the bottom of the cool storage agent container 1,
Absorbs the freezing and expansion of the cold storage agent 2. The material of the soft material 21 is
For example, a styrene foam, a soft polyurethane, a hard polyurethane, a foamed vinyl chloride or the like having a granular structure may be used.

The material for the regenerator container 1 is preferably plastic, soft vinyl chloride, or the like, but may be polyethylene, which is cheaper. The regenerator container 1 made of these materials can be easily formed into a desired shape by general-purpose blow molding or the like. For example, in the case of using tubular polyethylene as a raw material, the upper and lower ends to be joined are heat-sealed and air is blown from one side to obtain a desired shape. At this time, the seal portions (joint portions) at the upper and lower ends locally form the thin portion 1a.

On the other hand, the cold storage agent 2 is made by mixing chloride, stabilizer, gelatinizing agent, etc. and gelling (coagulating) it. The cold storage agent 2 maintains the shape in the cold storage agent container 1 and stabilizes the cold storage characteristics. Generated with consideration. The reason for using such a cold storage agent 2 is
This is because freezing the cold storage agent 2 in advance has an advantage that the object to be cooled can be frozen and held even when the power source of the cold storage type refrigerator / freezer cannot be used. For example, even if a trouble occurs in the power source or the refrigerating system during freezing and holding by using the power source, the cooled object can be effectively frozen if the regenerator 2 is frozen.

In the cold-storage refrigerator having the above-mentioned structure, as shown in FIG. 2, the freezing of the cold storage agent 2 proceeds along the isothermal line T from the first wall surface portion 1c to the second wall surface portion 1b. To do. In the present invention, the soft material 2 is provided on the bottom of the regenerator container 1.
Since 1 is filled, even if the cold storage agent 2 freezes and expands and a load pressure is applied to the cold storage agent container 1, the load pressure is absorbed by the soft material 21 and almost no load pressure is applied to the thin portion 1a. Disappear. As a result, the cold storage agent container 1 is less likely to be damaged.

FIG. 3 is a side view showing a main part of a cold storage type refrigerator / freezer which is another embodiment of the present invention. Here, the cold storage agent container 1 is filled with the antifreezing agent 22 not only having a lower freezing temperature than the cold storage agent 2 but also having a larger specific gravity. The antifreezing agent 22 does not substantially freeze when the cold storage agent 2 is cooled, and even if it is cooled by the evaporator, it does not mix with the cold storage agent 2 and maintains a separated state. The antifreeze agent 22 is produced in the same manner as the cold storage agent 2, but gels (coagulates) so that the composition mixing ratio of the above-mentioned chloride, stabilizer, gelatinizing agent, etc. is different from that of the cold storage agent 2. ) Is obtained.

In the cold storage type refrigerator / refrigerator having such a structure, as shown in FIG. 3, even when the cold storage agent 2 is freeze-expanded and a load pressure is applied to the cold storage agent container 1, the antifreezing agent 22 is not frozen. Therefore, the load pressure is dispersed and applied to the cool storage agent container 1 via the antifreezing agent 22. As a result, the thin portion 1
Since a too large load pressure is not applied to a, the regenerator agent container 1 is less likely to be damaged as in the above-described embodiment.

[0019]

As described above, according to the present invention, in the case of the cold-storage refrigerator according to claim 1, the bottom of the cold-storage agent container is filled with the soft material so that the thin-walled portion is frozen and expanded when the cold-storage agent is expanded. Since almost no load pressure is applied, the regenerator agent container is less likely to be damaged even if it expands. This improves the durability of the cold storage type refrigerator / freezer. Further, since the cold storage agent container is not easily damaged, the thickness of the cold storage agent container is made relatively thin, and the wall surface portion on the evaporator side is made flat so that the heat conductivity from the evaporator is excellent and It becomes possible to inexpensively manufacture a regenerator container having improved cooling efficiency.

Further, in the case of the cold-storage refrigerator according to claim 2, the freezing temperature in the cold-storage agent container is lower than that of the cold-storage agent and the specific gravity is large, and even when cooled by the evaporator, it is not mixed with the cold-storage agent. Since it is filled with an antifreezing agent that maintains the separated state, in this case as well, the same effect as that of the above-mentioned cold storage type refrigerator-freezer is achieved.

[Brief description of drawings]

FIG. 1 is a side sectional view showing a cold storage type refrigerator / refrigerator which is an embodiment of the present invention.

FIG. 2 is a side view showing a main part of the cold storage type refrigerator / freezer shown in FIG.

FIG. 3 is a side view showing a main part of a cold storage type refrigerator / freezer according to another embodiment of the present invention.

FIG. 4 (A) is a side view showing a main part of a conventional cold storage type refrigerator / freezer, and FIG. 4 (B) is a partially enlarged view thereof.

[Explanation of symbols]

 1 Regenerator container 1a Thin-walled part 1b, 1c Wall surface part 2 Regenerator 3 Cooling pipe 4 Heat insulating material 5 Outer box 8 Inner box 21 Soft material 22 Antifreeze 100 Box-shaped body A Air layer T Isotherm

Claims (2)

[Scope of utility model registration request] 1. A cool storage agent container having a cool storage agent filled therein,
In a cold storage type refrigerator-freezer provided with an evaporator for cooling the cold storage agent container, in the bottom portion in the cold storage agent container,
A cold storage refrigerator / freezer characterized by being filled with a soft material for absorbing freezing and expansion of the cold storage agent that occurs during cooling by the evaporator. 2. A regenerator container filled with a regenerator,
In a cold storage type refrigerator-freezer having an evaporator for cooling the cold storage agent container, in the cold storage agent container, a freezing temperature is lower than the cold storage agent, and a non-freezing having a specific gravity larger than the cold storage agent. A cold-storage refrigerator / freezer characterized by being filled with an agent.