JPS5945905B2 - Hydrogenated vacuum cooling water enclosure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a water enclosing body placed on an object to be cooled in order to add water when the object is vacuum cooled.

In the vacuum cooling method, the vacuum chamber is depressurized to approximately MHg, and the objects to be cooled in the vacuum chamber are cooled by the latent heat of vaporization attached to or contained in the object. Because the amount of water attached was small and the skin was hard and difficult for moisture to pass through, it was not possible to exert a sufficient cooling effect.

In such cases, a water-added vacuum cooling method is used in which the object to be cooled is sprinkled with water and then vacuum cooled.

However, in general distribution systems, the objects to be cooled are packed in cardboard boxes or containers, so when sprinkling water from the outside of these cardboard boxes or containers, it is difficult to spray water all over the objects to be cooled inside. there were.

Therefore, there was a drawback that the water addition effect was small and sufficient cooling was not possible.

Therefore, in order to add water to the object to be cooled from inside the cardboard box or container, a method has been proposed in which a water enclosure containing gas (generally air) and water is placed on the object to be cooled and water is added to the object.

In the conventional water encapsulation body, water flows out through the water encapsulation body to the vacuum chamber side when the pressure between the gas portion of the water encapsulation body and the pressure reduction chamber is 700 to 755 MHg.

However, in general, water inclusion bodies are fabricated at atmospheric pressure, in which case the internal gas pressure of the inclusion body is 7607# unless gas is forced into the inclusion body material after filling with water.
! It does not reach H.9, and is often below 700fiHg.

Therefore, even if the pressure in the decompression chamber is reduced from 760 MII to 5 HF, the predetermined pressure difference (70
0 to 755 wIlHg), and there was a drawback that there was no hydraulic outflow or only a small amount of outflow.

The present invention solves the drawbacks of the prior art, and provides water for hydrating vacuum cooling that can sufficiently cool objects to be cooled, such as lump objects, which cannot be sufficiently cooled by conventional vacuum cooling, in as short a time as possible (within one hour). This was done for the purpose of providing inclusion bodies.

The water enclosure according to the present invention consists of a soft or hard plastic container that does not transmit any or almost no gas even under reduced pressure and a water spray membrane, and the water spray membrane has a gas pressure difference of 50 to 300 KIIH9 between the inside of the enclosure and the vacuum chamber. It is characterized by being made of a material that is permeable to water within the range of .

As the water spray membrane, use waterproof paper, a composite material of paper and plastic, or a plastic film.

Examples of the plastic film include films made of polyolefin, polyvinyl chloride, and the like.

The material of plastic containers is polyvinyl chloride, polyester such as polyethylene terephthalate, etc.
The thickness etc. of these materials are selected so that no or almost no gas passes through them even under reduced pressure.

Next, the present invention will be explained in detail based on the drawings.

FIG. 1 is a system diagram of the vacuum cooling device.

The object to be cooled 1 is put into the vacuum chamber 2 through the door 2A.

The pressure inside the vacuum chamber 2 can be reduced to about 5 mI-L9 by a vacuum pump 5 via a water vapor collecting cold trap 4 and an exhaust pipe 3.

Generally, the object to be cooled is placed in the vacuum chamber 2 while being housed in a cardboard box 6 or the like as shown in FIG.

This cardboard box 6 is provided with, for example, a ventilation lower on the side surface, and a water enclosure 8 is placed on the object 1 to be cooled.

In this way, the pressure inside the cardboard box 6 is reduced, and the object to be cooled is sprayed with water by the water enclosure 8.

FIGS. 2 and 3 are a plan view and a sectional view, respectively, of a water inclusion body showing one embodiment of the present invention.

The water enclosure 8 shown in FIGS. 2 and 3 is composed of a soft plastic container 9 and a water spray membrane 10, which are joined at a joint 14 by welding or adhesive.

Air 11 and water 12 are sealed inside the water enclosure 8, and when the pressure difference between the inside and outside of the enclosure reaches 50 to 300 MHg, the water 12 inside the enclosure passes through the water spray membrane 10.
Water is sprayed uniformly in the form of droplets from the entire surface of the water spray film, and the object 1 to be cooled can be evenly wetted.

The water enclosure 8 shown in FIGS. 4 and 5 consists of a hard plastic container 13 and a water spray membrane 10, and when the pressure difference between the inside and outside of the enclosure reaches 50 to 300 mm H9, as described above,
Water is sprinkled from the water spray membrane 10.

The method of joining the joint portion 14 between the plastic container 9 or 13 of the enclosure and the water spray membrane 10 differs depending on the material of the water spray membrane 10.

When the water spray film is a composite material of paper and plastic or a plastic film, it can be easily welded with heat, and when the water spray film is made of waterproof paper, it can be bonded with an adhesive.

When using soft materials as plastic containers,
When a water inclusion body is placed in a vacuum chamber and placed under reduced pressure, the inclusion body expands due to the air inside the inclusion body, and the air pressure of the inclusion body, which was initially close to 760 MHg, decreases to 7007'mHF or less.

Furthermore, many container materials allow gas to permeate to some extent, and in this case, the pressure inside the enclosure further decreases.

However, the water spray membrane according to the present invention has a pressure difference between the inside and outside of 50 to 3
Since water flows out when 00MI(,!i'), an effective inclusion body can be made even if a soft material is used.

By configuring as described above, it is possible to reliably sprinkle the water necessary for performing water-added vacuum cooling onto the object to be cooled within the decompression chamber.

In addition, when manufacturing the inclusion body of the present invention, it is sufficient to fill water to the extent that an air portion is left inside the inclusion body and encapsulate it, and there is no need to use a device to introduce gas such as air after the inclusion body is manufactured. .

Furthermore, if a water-resistant membrane or a composite material of paper and plastic is used as the water spray membrane, the material cost and manufacturing cost will be reduced.

[Brief explanation of drawings]

Fig. 1 is a system diagram of a water-addition type vacuum cooling device, Fig. 2 is a plan view of a water inclusion body showing one embodiment of the present invention, Fig. 3 is a sectional view taken along the line A-A in Fig. 2, and Fig. 4 5 is a plan view of a water inclusion body showing another embodiment of the present invention, and FIG. 5 is a sectional view taken along the line BB in FIG. 4. Explanation of symbols, 2... Vacuum chamber, 5... Vacuum pump, 8... Water inclusion body, 9, 13...
...Plastic container, 10... Water spray membrane.

Claims (1)

[Scope of Claims] 1. A non-softening soft or hard plastic container that is placed on an object to be cooled and that allows no or almost no gas to permeate even under reduced pressure, in an enclosed body of gas and water that allows water to flow out under reduced pressure. and a water sprinkling film, the water sprinkling film being made of a material that transmits water when the gas pressure difference between the inside of the enclosure and the decompression chamber is in the range of 50 to 300 mH. Inclusion bodies. 2. The water encapsulating body according to claim 1, wherein the water spray film is made of waterproof paper, a composite material of paper and plastic, or a plastic film.