JPS6089660A - Continuous heat-insulating method - 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 This invention is based on the patent application of Utility Model Application Publication No. 26931 of 1960, Publication No. 30302 of the same year, Publication No. 16609 of the same year, and No. 12842 of the same year of the same year. A small container with thermal convection that has caused various problems in practical use because it is difficult to keep cold for a long time due to rapid changes in the heat convection of the outside air when a cold insulator is sealed inside an external container. It is divided into a large number of independent containers, which are then directly frozen, or these multiple containers are further inserted and sealed into a larger container to produce liquid gas, solid dry ice, solid dry ice, etc. When the object to be cooled is quickly frozen using a refrigerator, etc., and placed in an insulated container or used for direct cold storage, each small container containing an independent freezing agent mixture is It is subdivided into a large number of containers that have the characteristic of retaining cold storage for a long time by performing heat exchange within a limited range. The contents relate to the method of keeping cold agent mixtures cold.

Generally, a well-known cold pack is a gelled cold pack made by dissolving a thickener in water, which is inserted into a plastic bag and sealed, and sold under the trade name ICE-NON. This type suppresses thermal convection and thermal conductivity of outside air by adding a thickener, but the higher the outside temperature, the higher the thermal conductivity, and the more fluid it becomes. Therefore, even if it is cooled to -5 to -20℃, it can only be kept cold for about 2 hours, and there is a problem with keeping it cold for 3 to 4 hours.Also, it takes time to keep it cold for more than 2 hours. did.

In addition, the type that uses cryogenic liquid and seals it in a plastic bag as a cold bag retains cold faster than the former ice non, and the surface temperature of the cold pack is -5 to -.
Although the temperature drops to 10°C, the cooling time is short because the viscosity is not low, making it unsuitable for long-term use.

Therefore, in order to reduce the heat exchangeability of this cryogen mixture against heat convection and exert a cold storage effect, it is difficult to thicken the thick cryogen mixture with a thickener, and this problem was solved. To do this, divide the cryogen mixture in a separate container into as many small pieces as possible, collect a certain amount of this, fit it into a large container panel or large bag, seal it, and solidify it in a cooling room as a liquid gas. When cooling with solid dry ice or a refrigerator and placing it in an insulated container or taking it out separately for cold storage, the independent subdivided cold insulators should be placed in containers with individual limits for cold storage and heat radiation. In addition, since cooling and heat dissipation is carried out by the interaction between individual containers, the heat exchange performance slows down, and the cooling time is more than doubled, as it only acts as a thickening agent. It has the advantage that the cooling time required for the first cold storage is also shorter than that of ice-non. This subdivision will extend the cold storage in proportion to the subdivision, but if there are too many pieces, it will take a long time for the initial cooling, so a combination of conductive containers is required. is,
However, when these containers are accumulated or a plurality of such containers are combined to make a cold storage, it is possible to keep the cold for 10 hours. Its uses have been expanded to include a cold insulator for transporting pharmaceutical semen, and a large number of uses have been made as cold pillows for sick people.It has also been used to prevent spoilage during the processing of school lunches, improving the disadvantage of cold storage using ice, which impairs freshness due to deicing water. This is important, and when used together with a refrigerator as a refrigerated container panel, it has the effect of saving 10 to 20% of refrigerating energy.

For this reason, the present invention involves preparing a large number of cryogen mixtures subdivided into small containers, and collecting them in another large container.
Seal it, freeze it, and keep the object cold in a cold container.
Alternatively, there is a cold storage method that is directly applied to a cold pillow for a sick person, and an embodiment of this cold storage method will be described below with reference to the drawings.

In the figure, a cryogenic agent (5), a thickener (6), a heat insulating material (7), and water (4) are inserted through the opening (2) of a polyethylene or polyethylene vinyl acetate resin film (1), and a film bag ( The opening (2) in 1) is thermally fused (3).

Figure 2 shows its A-B cut side view, (4) in Figure 1.
indicates a certain space.

Figure 3 (a) shows a front view of a plastic or aluminum foil plastic laminate bag, and (b) shows a tubular bag in which cryogen (5) and water or alcohol/glycol (4) are inserted. In the figure, (c) shows a spherical container, and (d) shows the one inserted into an aluminum can.

Figure 4 shows the plastic bags (1) (1a) (
1b) (1c) (1d) (1h) (1s) (1j) (1
e) (1f) (1g) are inserted into the opening (9) of the plastic outer bag (8), arranged, and heat sealed (10) to seal the plastic bag. Thickener (6) Insulation (7) Water (4) are sealed.

FIG. 5 is a cutaway view taken along line A-B. Figure 6 shows a container panel (11) in which a large number of aluminum cans (12) are lined up and insulation boards (7') are spread over them to insulate them.
A cooling agent (5), a thickener (6), a heat insulating material (7), water, alcoholic water, or glycol water (4) are mixed in the can to create a certain space (4').

The board (11b) of this container panel (11) is screwed with a vault (11a), and a Styron sponge board (
13) is attached.

Figure 6 (b) shows a container for holding the cryogen mixture in the form of an elongated tube (14), with the mixture sealed inside.This condensing tube is pre-cooled and the container panel (
14) Insert a cover plate (14') into the container and screw it on, and freeze it to use as a container freezing panel to store food, seafood processing, livestock processing, etc.

This panel is assembled as a container lining panel for a refrigerated vehicle, and the object to be cooled is housed inside the panel.

Figure 7 shows an insulated box for fishing and drinking water (15).
A drainboard (15') is fitted into the bottom of the inside, a cooled body (15a) is fitted into the top surface of the drainboard (15'), a cage (17) is joined and screwed to the back of the heat insulating board of the upper cover (16), and the side surface ( From A), put the frozen bag (8) shown in FIG. 4 or freeze the container pallet plate (11) shown in FIG. and the tube (2) on the top of the upper lid (16).
Liquid gas is introduced from the upper lid (16) of the cold storage box from the cylinder (20) with a needle valve (20') attached to the cylinder (1'), and the aluminum of the heat exchange plate (22) is introduced through the internal pipe (21''). Metal exchange plate (24) with a perforated surface (23)
) to keep the frozen bag (8) cold at the same time, and the object to be cooled (1
5a) Keep it cold. (19) is a cold box made of hard plastic, metal, or wood.

FIG. 8 is a front view of the heat exchange plate (22), in which an exchange plate (24) made of aluminum or copper plate is fitted.
A large number of perforations (23) are bored in the surface. 9th
The figure shows a side view taken along the line A-B, in which the exchange plate (24) is bent and fitted in a wavy shape.

Figure 10 shows the relationship between the cold storage temperature change and the cold storage time of the cold storage freezer bag (8) into which many of the plastic bags shown in Figure 4 are inserted. (26) contains 5 sachets and contains a freezing agent mixture that does not have a sachet inside.
It comes in pieces. (27) has 7 sachets, (28) has 10 sachets, and (29) has 1 sachet.
(31) contains 2 freezer bags (8)
It is a combination of individual parts.

Also, (32) is a frozen bag filled with 20 small bags.

Due to this characteristic, the more the number of sachets (1) to (14) in the freezer bag increases, the longer the cold storage time will be. In some cases, the cold storage time may be shortened.

For example, in characteristic (32), the number of sachets in frozen bag (8) is 2.
This is the result of inserting 0 pieces, and (28) is the result of inserting 0 pieces.
This is the result.

The total weight of the chilling agent mixture in this sachet is the same and is the result of dividing the internal liquid bag into smaller pieces.An example of the formulation of this mixture is as follows.

Example (1) Ammonia nitrate 50g Urea 50g Water 100g Example (2) Urea 100g Water or alcohol 100g Glycol example (3) Ammonium sulfate 100g Water 100g C. M. S. Carboxy 5g Methylsudarch thickener Insulating material Polyurethane sponge or 5g Styrene foam Example (4) Urea or ammonium nitrate mixed urea 50g Organic acid, malic acid 30g Boric acid 20g Alcohol 100-120g Glycol 0-20g Thickener 1g Example (5) Ammonium nitrate 50 g Glauber's salt 6-19 hydrate 50 g Thickener 1 g Insulating material powder 1 g The formulation example shown in Figure 10 is the formulation example of Example (2).

However, this solvent is water. In FIG. 11, the example (2) in which the solvent contains water is shown in (33), the solvent in which alcohol is contained is shown in (34), and the one in which glycol alcohol is shown in (35).

In this characteristic, a bag containing water is placed in a freezer at -20°C in advance and frozen for about 12 hours, and then the frozen bag has a surface temperature of -7°C and contains 10 small bags. This result shows that alcohol-containing (34)
Because it is non-freezing, the thermal convection is large, and the glycol and alcohol 3:7 of (35) is more anti-freezing, so the convection was maximum when kept cold at -20℃, but this When it is cooled to -70°C or lower, the cold retention is prolonged and it becomes a hardened body, as shown in (36).

Therefore, when making ice pillows, when rapidly freezing at -20℃, those containing alcohol or glycol become soft and have cushioning properties, but water is hard, so it is better to be soft and comfortable. .

Example (4) is shown in (37).

From this result, if you need long-term cold storage for business or fishing purposes, the time required for freezing bags (8) will be longer than when using a combination of multiple 10-piece bags for cold storage. (8) Cool storage is more effective and economical than increasing the number of sachets in the bag, and when 10 or more sachets are inserted, sachets laminated with aluminum foil and plastic film are effective. .

Therefore, when housing in a metal container, the heat exchangeability is high, so the cooling time can be shortened individually, but if the number increases, the time can be extended.

Moreover, (30) in FIG. 11 was measured at a room temperature of 25° C. using a conventional cryogenic agent, and a significant difference was observed throughout FIG. 10.

As mentioned above, the feature of this invention is that it can keep a cold insulator composed of a thickener and water like a conventional ice cream for a longer period of time.
Inside this cold insulator, individually isolated cryogen mixtures are inserted and sealed in a large number of small bags or can containers, and a space larger than the amount to be increased by freezing is created in the container. In addition, when adjusting the material with the necessary conductivity to increase the number of sachets or cans, the cold storage time can be extended by 2 to 5 times.
This is an invention that uses the same amount and has higher practical value, and further enhances the short-lived cold preservation effect of cryogen liquid.

As a result, the invention has been expanded to many uses such as industrial, medical, and transportation, making it an industrially useful invention.

Claims (1)

[Claims] As stated in the following text, cryogen water and the same alcoholic solution are placed in soft pouches made of rubber, plastic, aluminum foil, plastic laminate film, tubes, spheres or hard plastic moldings, and containers made of glass porcelain and metal. After filling and sealing glycol liquid, thickener, heat insulating material, heat storage material, etc., a certain space is created and a large number of sealed small-capacity packages are combined and inserted into a large hollow outer container and sealed. The cold insulator is cooled with liquid gas, solid dry ice, a refrigerator, etc., and is combined with an insulating cold storage body as necessary to make frozen container panels, medical cold insulators, food freshness preservation containers, and cold pillows. This is a continuous cold storage method that is characterized by dividing a small container containing cryogenic liquid into multiple pieces to suppress heat convection.