JPS6069472A - Cooling method using activated carbon - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a cooling method, and more particularly to a cooling method that provides a conveniently portable cooling device.

Conventional Structure and Problems The classic method for conventional simple refrigerators is to put water into the storage compartment and use water to cool the refrigerator. In this method, the water dissolves and becomes water, which poses a problem in how to dispose of it. In order to solve this water problem in a similar way, a substance with a low freezing point and high heat capacity, such as polyethylene glycol, is added with appropriate additives and then stored in an airtight, flexible bag-like container. A method has also been proposed in which the object is frozen and placed in a desired storage cabinet for refrigerating.

This method is convenient in practical use because it can be used many times and is designed so that no unnecessary substances such as aqueous solution are generated even at room temperature.

However, a serious drawback of this method is that it cannot be used unless it is frozen and stored for a long time in advance.

A method to solve these drawbacks is to absorb moisture using a substance that has excellent hygroscopicity and also exhibits an endothermic reaction when absorbing moisture, and uses that endothermic reaction and the heat of vaporization of the moisture to cool the material. There is a proposal to try. In other words, there is a method of absorbing moisture using a highly hygroscopic substance such as calcium chloride.

The feature of this method is that when moisture vaporizes, heat of vaporization is absorbed from the surrounding area, and the reaction in which calcium chloride itself absorbs moisture is an endothermic reaction, so it has an extremely high cooling effect. However, the first disadvantage is that it must be dried when used repeatedly, and if you try to dry calcium chloride with an anhydrous salt shaker, a heating temperature of 200°C or higher is required, which limits the drying conditions, making it easy to use. There are some things I can't do. Although it is easy to dry up to dihydrate salt, the amount of moisture absorbed is small and the above-mentioned effect is reduced. A second disadvantage is that, because it is a corrosive material, storage containers are limited.

OBJECTS OF THE INVENTION It is an object of the present invention to eliminate the above-mentioned conventional drawbacks and to provide a simple and quick cooling method.

Structure of the Invention The cooling method of the present invention connects a first sealed container containing moisture at the bottom and a second sealed container containing activated carbon powder or fibers with a specific surface area of 1000 m"/1 or more through a conduit. , the water vapor vaporized from the first container is adsorbed on activated carbon, and the first container is cooled using the heat of vaporization of the water in the first container.

Here, the first container is provided with a subane into which five cooling objects are to be placed, and it is important that airtightness and heat insulation properties are sufficiently considered. Nubase, which still needs to retain moisture, can be used in the form of an aqueous solution, or by impregnating it with porous fibers, etc., which have good hygroscopicity, to reduce shaking of the container due to changes in the weight of water (1 u) during movement. Since the surface area of water increases, evaporation of water is promoted and cooling efficiency increases.

The second container also has the same airtightness and insulation as the previous container.
will be recognized.

The larger the specific surface area of the activated carbon used, the greater the effect. A powder type may be used, and even fibers can have the same effect as long as the specific surface area is 1000 m''/1 or more. It is convenient to use it in a paper-like container.

The characteristics of using activated carbon are: ■It is extremely safe as it does not eat into the skin; ■It has a high moisture absorption rate and a large amount of moisture per unit weight; ■It can be easily dried after absorbing moisture and can be dried sufficiently even in the sun. etc., and can be easily operated even with W.

Description of examples FIG. 1 shows an example of the configuration of a cooling device using the present invention.

show. Reference numeral 1 designates a first airtight container in which a cooling object is placed, the inner surface of which is made of a plastic plate, the upper part of which can be opened and closed at will with a lid 2, and the area around the plastic plate is covered with heat insulation. At the bottom of the container 1, a water-absorbing layer 3 is provided in which water is absorbed into a porous water-absorbing material, such as a porous material made of natural fibers, synthetic fibers, or synthetic resin.

4 is a shelf on which a cooling object is placed. On the other hand, a bag 5 made of a porous sheet with good moisture or gas permeability is formed,
The inside is filled with activated carbon and inserted into the second sealed container 6 so that it can be easily taken out and taken out. 7 is a lid of the container 6. These vessels 1 and 6 are connected by a conduit 9 with pulp 8.

With this configuration, when cooling, the dried activated carbon layer is placed in the container 6, the pulp 8 is opened, and the container 1 and the activated carbon layer are connected. Then, the moisture in the container 1 evaporates, taking away the heat of vaporization and cooling the container 1.

Further, the vaporized water vapor is adsorbed by activated carbon.

Note that if the inside of this closed container is suctioned and depressurized using a vacuum pump, the cooling effect will be further promoted, although the device will become larger.

Next, 1.5 liters of water is poured into the bottom of the container 1 with an internal volume of 51, while the surface (l 1600rn"/f
1 of activated carbon was inserted, the pulp 8 was opened, and the temperature change inside the container 1 was measured. As a result, the ambient temperature is 25°
The change in temperature inside the refrigerator 1d at C was as shown in Figure 2.

As is clear from this result, it can be seen that the refrigeration capacity is sufficient.

ADVANTAGEOUS EFFECTS OF THE INVENTION The present invention provides a cooling method that is easy to operate, and can be particularly applied to small portable cooling devices.

[Brief explanation of drawings]

FIG. 1 is a schematic vertical cross-sectional view showing a cooling device according to an embodiment of the present invention, and FIG. 2 is a diagram showing changes in internal temperature. 1...First container, 3...Water absorption layer, 6...
...Activated carbon storage bag, 6 ...Second container, 8.
・Valve, 9... Conduit.

Claims (1)

[Claims] A first airtight container containing moisture at the bottom and a container with a specific surface area of 1.
A second airtight container containing activated carbon of 000 m/f or more is connected through a conduit, and the activated carbon layer adsorbs water vapor vaporized from the first container to utilize the heat of vaporization of water in the first container. A cooling method using activated carbon to cool a first container.