JPS59129693A - Method of replacing initial gas of non-outside air gas atmosphere box - 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 Kippa 8A describes an initial gas replacement method for a box with a non-external gas atmosphere, particularly an initial gas-tight box that can replace the internal air with a non-external gas and can be placed in the gas atmosphere. Concerning gas replacement method.

Conventionally, such non-external gas atmosphere boxes are used for sample processing, for example, culture tests in an atmosphere of the gas, and initially it is necessary to replace the air in the box with the required gas. Conventionally, 1C that performs this method relies on the method of allowing the required gas to flow directly into the box and expelling the internal air to the outside, which has a poor initial gas replacement effect and takes a long time to complete. It is time consuming, and gas loss is considerable. Especially in the case of expensive gas, the initial cost is large, which poses a problem.

Furthermore, in order to increase the efficiency of air removal during the process of removing air from inside the box, there has been a box with a negative pressure resistant structure that allows the inside of the box to be evacuated, but this is extremely expensive and difficult to manufacture. , after the initial gas replacement,
In the normal use stage, the negative pressure resistant structure is no longer necessary, and there is a disadvantage of excessive quality.

Therefore, the present invention provides an initial gas replacement method for a non-external gas atmosphere box, which eliminates the drawbacks of the prior art described above and allows the initial gas replacement to be performed simply, efficiently, in a short time, without any loss of gas, and reliably. It is intended to.

The initial gas replacement method for a non-external gas atmosphere box of the present invention is an initial gas replacement method for an airtight box that can replace the internal air with a non-external gas atmosphere and is placed in the gas atmosphere. A flexible and closed airtight bag having a size and shape that fills the inner space of the box in one piece or in a plurality of pieces is placed in the box, and the airtight bag is placed in the air inside the box. The space formed in isolation from this is used as a gas injection chamber and the required gas is injected, and the air inside the box is expelled to the outside by the expansion of the airtight bag due to the gas injection. It is characterized by gas replacement (!:'fc).

According to the present invention, money is placed in a sealed airtight bag, and the airtight bag forms a space in the air inside the box that is isolated from the airtight bag, and this space is applied to a gas injection chamber\, and the required amount is Gas is injected, and the air inside the box is expelled to the outside by the expansion of the airtight bag due to the gas injection.The initial gas replacement of the box is performed, so during the gas replacement, the injected gas accompanies the expulsion of the internal air. Gas replacement can be achieved simply, efficiently, and in a short period of time without causing any loss due to gas leaking to the outside, without evacuating the inside of the box, and without making the box resistant to negative pressure.

In addition, since the airtight bag is flexible and has a size and shape that, when inflated, fills the space inside the box with a single unit or a collection of multiple units, it is fully guaranteed that the gas in the box will be replaced reliably. .

Furthermore, in the present invention, the initial air inside the box is directly replaced with the required gas with the intervention of an airtight bag, without replacing the inside of the box with an airtight body containing outside air isolated from the inside of the box. , the initial gas exchange required is much simpler.

In the present invention, after the airtight bag has been used by discharging the internal gas into the box, it can be folded and left in the box, or if the box has an entry box, it can be taken out of the box. It's okay.

The sample may be taken out in the same manner as in the case of taking out a sample from a conventional box with an entry box. That is, first replace the air in the entry box with the same gas as the non-external gas atmosphere inside the box, open the inner door that isolates the box from the entry box, place the airtight bag into the entry box, and completely close the inner door. After isolating the inside of the entry box, if necessary, the gas inside the entry box can be replaced with air and taken out to the outside. In this case, since the airtight bag is flexible, it can be folded and easily transferred from a box to a dientry box.

The airtight bag in the form of a plurality of assemblies is particularly suitable when a large structure is installed inside the box.

Embodiments of the method of the present invention will be described below with reference to the drawings.

In the figure, (1) indicates an airtight bag that has been closed, and the airtight bag (1)
is flexible and has such a size and shape that when expanded, it fills the inner space of the non-external gas atmosphere box (2). The airtight bag (1) is also equipped with a gas inlet (3). In the illustrated case, the airtight bag (1) is in the form of a single body, but it may be in the form of a plurality of bags. In the latter case, each airtight bag is preferably provided with a gas inlet.

A small chamber (4) as an entry box is connected to the box (2) at the - side end in an airtight manner, and an inner door ( (not shown) is provided. The small chamber (4) has an outer door (5) that isolates the inside from outside air. When the box (2) and the small room (4) are opened, the box (2) is completely isolated.
) and the chamber (4) communicate with each other. (6) are airtight gloves for performing the required operations inside the box (2) while isolated from the outside air. (7) shows the transparent front plate of the box (2), and (8) shows the structure inside the box (2).

Fold the airtight bag (1) into a small size, put it in the box (2) that connects the small chamber (4), and insert it into the gas inlet (3) of the airtight bag (1).
K connect the required external gas supply source, for example a gas cylinder (not shown). This connection can be made, for example, by connecting the gas injection port (3) of the airtight bag (1) to a hose or the like to the gas injection replenishment port (not shown) when the box (2) is under negative pressure, which is already installed in the box (2). If the airtight gloves (6) on the front plate (7) of the box or box (2) can be easily removed at the joint (Hy, attachment 7 lange), remove the gloves (6). This can be done by inserting the hose into the box (2) through the opening created by the gas inlet, connecting it to the gas inlet (3), and then injecting the hose into the box (2).

Next, the required gas is injected into the airtight bag'(1) to inflate it. The gas is injected until the airtight bag (1) is inflated until the inner space of the box (2) is filled with 1". As the airtight bag (1) is expanded by this gas injection, The air inside the box (2) is expelled to the outside.

When filling the airtight bag (1) with gas is completed, the gas inlet (3) is sealed by appropriate means, the hose is completely removed, all openings of the box (2) are closed, and the box (2J After ensuring airtightness, the gas inlet (3) is fully opened by operating the airtight gloves (6) provided in the box (2), and the gas in the airtight bag (1) is poured into the box (2). released into the

Airtight bag (if the gas inside υ is sufficiently released, airtight bag (1)
75i When it is almost completely deflated, remove the airtight bag (1
) and leave it in the box (2), or take it outside in the same way as the sample was taken out through the small chamber (4), that is, in the usual manner.

The present invention is not limited to the above-mentioned embodiments, but can also be applied to a box without a small compartment (4) as an entry box, and in this case, a door (not shown) attached to the box Open it, put the airtight bag (1) inside,
After use, just fold it and leave it in the box.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing an example of an airtight bag used in the method of the present invention, Figure 2 is a front view of a non-external gas atmosphere box, and Figure 8 is a front view of a non-external gas atmosphere box.
The figure is a side view thereof. (1) is an airtight bag, (2) is a non-external gas atmosphere box, (3) is a gas inlet, and (4) is a small chamber of the box. Figure 1 Figure 3

Claims (1)

[Claims] ■ An initial gas replacement method for an airtight box that can replace the internal air with a non-external gas and is placed in the gas atmosphere, and when it expands, a single body or a collection of several '4i gases fills the inner space of the box. A flexible and closed airtight bag having a size and shape that can be filled with gas is placed inside the box, and the airtight bag creates a space in the air inside the box isolated from the airtight bag, which is then used as a gas injection chamber. A non-external gas atmosphere characterized by injecting the required gas into the airtight bag, expelling the air inside the box to the outside by expanding the airtight bag by injecting the gas, and performing initial gas replacement in the box. Box initial gas replacement method.