JPS6147677B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an initial gas replacement method for a box with a non-external gas atmosphere, particularly an airtight box that can replace the internal air with a non-external gas and is placed in the gas atmosphere. Regarding the initial gas replacement method.

Conventional technology and its problems Conventionally, such non-external gas atmosphere boxes have been used for sample processing, for example, culture tests in an atmosphere of the gas concerned. Need to be replaced. Conventionally,
To do this, the method relies on allowing the required gas to flow directly into the box, thereby expelling the internal air to the outside, which has a poor initial gas replacement effect and takes a long time to complete. It took a long time, and there was also considerable loss of gas. Particularly in the case of expensive gas, the initial cost is large, which poses a problem.

Furthermore, in order to improve the efficiency of air removal during the process of evacuation of air inside the box, boxes with a negative pressure resistant structure have been known so that the inside of the box can be evacuated, but this is extremely expensive and After the initial gas replacement is completed, the negative pressure resistant structure is no longer necessary during normal use, 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 loss of gas, and reliably. It is intended to.

Means for Solving the Problems 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 is capable of replacing internal air with a non-external gas atmosphere and is placed in the gas atmosphere. In this method, a flexible and closed airtight bag having a size and shape such that when inflated, a single bag or a plurality of bags substantially fills the inner space of the box is placed in the box, and the bag is placed in the box. A space formed in the air inside the box and separated from it by an airtight bag 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 in that after the air in the box is expelled, the non-external gas in the airtight bag is allowed to flow out into the box.

Effect According to the present invention, a closed airtight bag is placed inside the box, a space is formed in the air inside the box and isolated from the airtight bag, and the space is applied to the gas injection chamber, so that the airtight bag is closed and the airtight bag is placed inside the box. The required gas is injected through a conduit, etc., and the air inside the box is expelled to the outside by the expansion of the airtight bag, and when the airtight bag is filled with gas, the air release port of the box is closed, and then the inside of the airtight bag is By releasing the gas into the box, the initial gas replacement of the box is performed.
During the gas replacement, there is no loss due to the injected gas being accompanied by the internal air being expelled and flowing out to the outside.
Furthermore, gas replacement can be achieved simply, efficiently, and in a short time without evacuating the inside of the box, and therefore 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, it almost fills the interior space of the box with a single body or a plurality of bags,
Ensures gas replacement in the box.

Furthermore, in the present invention, the initial air in the box is directly replaced with the required gas under the intervention of an airtight body, without completely replacing the inside of the box with an airtight body containing outside air isolated from the inside of the box. , the required initial gas exchange is simpler. That is, when replacing the inside of a box with an airtight bag filled with outside air that isolates the interior from the inside of the box, after the replacement, while injecting non-external air gas into the box, the inside of the airtight body inside the box is In order to release outside air to the outside of the box, it is necessary to open the airtight bag to the atmosphere and keep the inside of the airtight bag airtightly isolated from the inside of the box. This is not necessary, and replacement of the box with non-external gas can be achieved by opening an airtight bag within the box.

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, the air in the entry box is first replaced with the same gas as the non-external gas atmosphere inside the box, the inner door separating the box and the entry box is opened, the airtight bag is transferred to the entry box, the inner door is closed, and entry is made. After isolating the inside of the 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 the box to the entry box.

A multi-piece airtight bag is particularly suitable when a large structure is installed inside the box.

Effects of the Invention As described above, the present invention provides an initial gas replacement method for a non-external gas atmosphere box that allows initial gas replacement to be performed simply, efficiently, in a short period of time, without loss of gas, and reliably. can do.

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

In the figure, 1 indicates a closed airtight bag, and the airtight bag 1
is flexible and has a size and shape that substantially fills the interior space of the non-external gas atmosphere box 2 when expanded. Also, the airtight bag 1 has a gas inlet 3
It is equipped with 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 in an airtight manner at one end thereof, and an inner door (not shown) is interposed between the box 2 and the small chamber 4 to isolate them in an airtight manner. ing. The small chamber 4 has an outer door 5 that isolates the inside from outside air. When the inner door separating the box 2 and the small chamber 4 is opened, the box 2 and the small chamber 4 communicate with each other. Reference numeral 6 denotes airtight gloves for performing necessary operations inside the box 2 while being isolated from the outside air. Reference numeral 7 indicates a transparent front plate of the box 2, and reference numeral 8 indicates a structure inside the box 2.

The airtight bag 1 is folded into a small size and placed in the box 2 through the small chamber 4, and the required external gas supply source, such as a gas cylinder (not shown) is inserted into the gas inlet 3 of the airtight bag 1.
Connect. This connection can be made, for example, by connecting the gas inlet 3 of the airtight bag 1 with a hose or the like to the existing gas injection replenishment port (not shown) when the box 2 is under negative pressure, or by connecting the gas inlet 3 of the airtight bag 1 with a hose or the like, or by If the airtight glove 6 can be easily removed at its joint (attachment flange), the hose can be inserted into the box 2 through the opening created by removing the glove 6 and connected to the gas inlet 3. This can be done using the following methods.

Next, the required gas is poured into the airtight bag 1 and expanded. The gas is injected until the expansion of the airtight bag 1 substantially fills the interior space of the box 2 with the expansion. As the airtight bag 1 expands due to 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 hoses are removed, and all openings of the box 2 are closed to ensure airtightness of the box 2. The gas inlet 3 is opened by operating the airtight means 6 provided in the airtight bag 1, and the gas in the airtight bag 1 is released into the box 2.

When the gas inside the airtight bag 1 is sufficiently released and the airtight bag 1 is almost completely deflated, the airtight bag 1
The sample is folded and left in the box 2, or taken out to the outside in the same manner as the sample is taken out through the small chamber 4, that is, in the usual manner.

The present invention is not limited to the above-mentioned embodiment, but can also be applied to a box without a small chamber 4 as an entry box. In this case, the door (not shown) provided in the box is opened, The airtight bag 1 may be placed inside, and after use, it may be folded and left in the box.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an example of an airtight bag used in the method of the present invention, FIG. 2 is a front view of a non-external gas atmosphere box, and FIG. 3 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.

Claims (1)

[Claims] 1. An initial gas replacement method for an airtight box that is capable of replacing the internal air with a non-external gas and is placed in an atmosphere of said gas, in which, when expanded, a single box or a collection of multiple boxes fills the inner space of the box. A flexible and closed airtight bag having a size and shape suitable for filling the box is placed in the box, and a space formed in the air within the box and isolated from the airtight bag is used as a gas injection chamber. The required gas is injected into the airtight bag, and the air inside the box is expelled to the outside by the expansion of the airtight bag due to the gas injection. An initial gas replacement method for a non-external gas atmosphere box, which is characterized by causing the gas to flow out.