Method for supplying liquefied gas to a container for transporting low-temperature samples, and liquefied gas supply device

Abstract

To provide a method for making a liquefied gas absorption material in a low-temperature specimen transport vessel absorb a liquefied gas in a short time, and an implement.SOLUTION: A method makes a liquefied gas absorption material 14 absorb a liquefied gas 2 by using a liquefied gas supply implement 3. A low-temperature specimen transport vessel 1 comprises an outer shell case 11 having an outer wall 111 and an inner wall 112, a pipe 12 installed inside the inner wall 112, an absorption material accommodation part 13 formed between the inner wall 112 and the pipe 12, and a liquefied gas absorption material 14 accommodated in the absorption material accommodation part 13. The inner wall 112 has a neck part 16. A clearance 18 is formed between an upper end part of the pipe 12 and the neck part 16. The liquefied gas supply implement 3 comprises a liquefied gas accommodation vessel 31 and a liquefied gas flow-out nozzle 32. The method makes the liquefied gas 2 flowing out of the liquefied gas flow-out nozzle 32 flow into the clearance 18.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a technique for absorbing liquefied gas into a liquefied gas absorbent material in a container for transporting low-temperature samples. [Background technology]

[0002] 2. Description of the Related Art Conventionally, a cryogenic sample transport container is known which is used by absorbing liquefied nitrogen into a liquefied nitrogen absorbent placed inside (see, for example, Non-Patent Document 1).

[0003] In the cryogenic sample transport container disclosed in Non-Patent Document 1, the liquefied nitrogen absorbent is accommodated in a container formed between a resin pipe installed in the cryogenic sample transport container and the inner wall of the cryogenic sample transport container. When liquefied nitrogen is absorbed into the liquefied nitrogen absorbent, liquefied nitrogen is poured into the resin pipe from the upper opening of the cryogenic sample transport container. The poured liquefied nitrogen flows into the container from the gap between the lower end of the resin pipe and the bottom of the inner wall, and is absorbed by the liquefied nitrogen absorbent. [Prior art documents] [Non-patent literature]

[0004] [Non-Patent Document 1] Astec Co., Ltd., Liquid Nitrogen Storage Container CX Series, [Searched on August 5, 2019], Internet<URL:http: / / astec-bio.com / pdf / d6.pdf> Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the above method, since the liquefied nitrogen is absorbed from the bottom to the top of the liquefied nitrogen absorbent, it takes a long time to absorb a sufficient amount of liquefied nitrogen into the liquefied nitrogen absorbent. In addition, in order to absorb the liquefied nitrogen up to the top of the liquefied nitrogen absorbent, it is necessary to accumulate the liquefied nitrogen in the resin pipe until the liquid level becomes high to a certain extent, and to maintain it, it is necessary to pour it in several times. In addition, after the liquefied nitrogen absorbent absorbs a specified amount of liquefied nitrogen, it is also necessary to discharge the liquefied nitrogen that is not absorbed by the liquefied nitrogen absorbent, and this discharge work is time-consuming.

[0006] The present invention has been devised in view of the above problems, and aims to provide a method and device capable of causing a liquefied gas to be absorbed in a liquefied gas absorbent material in a container for transporting low-temperature samples in a short period of time. [Means for solving the problem]

[0007] A method for supplying liquefied gas to a cryogenic sample transport container according to a first aspect of the present invention is a method for absorbing liquefied gas into a liquefied gas absorbent of a cryogenic sample transport container having a liquefied gas absorbent by using a liquefied gas supplying device. The cryogenic sample transport container includes an outer shell case, a pipe installed inside the outer shell case, an absorbent storage section formed between the outer shell case and the pipe, and the liquefied gas absorbent stored in the absorbent storage section. The outer shell case has a neck portion at an upper portion, the neck portion having an inner diameter smaller than other portions. The absorbent storage section is formed between a portion of the outer shell case that is located lower than the neck portion and the pipe. A gap for exhausting gas in the absorbent storage section is formed between the upper end of the pipe and the neck portion. The liquefied gas supplying device includes a liquefied gas storage container and a liquefied gas outlet nozzle for outletting the liquefied gas stored in the liquefied gas storage container. The method for supplying liquefied gas to the low-temperature sample transport container includes the steps of: placing the liquefied gas outlet nozzle in the low-temperature sample transport container so that liquefied gas flowing out from the liquefied gas outlet nozzle flows into the gap; and storing liquefied gas in the liquefied gas storage container.

[0008] According to the method for supplying liquefied gas to a cryogenic sample transport container having such a configuration, the liquefied gas can be absorbed in the liquefied gas absorbent material easily and in a short time.

[0009] A method for supplying liquefied gas to a container for transporting low-temperature samples according to a second aspect of the present invention is characterized in that, in the method for supplying liquefied gas to a container for transporting low-temperature samples according to the first aspect, the liquefied gas supplying device has a plurality of the liquefied gas outflow nozzles.

[0010] A method for supplying liquefied gas to a container for transporting low-temperature samples according to a third aspect of the present invention is characterized in that, in the method for supplying liquefied gas to a container for transporting low-temperature samples according to the first or second aspect, the nozzle length, nozzle inner diameter, and number of nozzles of the liquefied gas outlet nozzle of the liquefied gas supplying device are set so that the liquefied gas flows out in accordance with the liquefied gas absorption rate at which the liquefied gas absorbent absorbs the liquefied gas.

[0011] A method for supplying liquefied gas to a container for transporting low-temperature samples according to a fourth aspect of the present invention is characterized in that, in the method for supplying liquefied gas to a container for transporting low-temperature samples according to any one of the first to third aspects, the liquefied gas outflow nozzle is constructed using a flexible tubular material whose tip can be changed in direction.

[0012] A liquefied gas supplying tool according to a fifth aspect of the present invention includes a liquefied gas storage container for storing liquefied gas, and a plurality of liquefied gas outlet nozzles for outletting the liquefied gas stored in the liquefied gas storage container. The liquefied gas storage container has an injection opening for injecting liquefied gas from the outside, and the plurality of liquefied gas outlet nozzles are configured using a flexible tubular material whose tip direction can be changed.

[0013] A method for supplying liquefied gas to a cryogenic sample transport container according to a sixth aspect of the present invention is a method for absorbing liquefied gas into a liquefied gas absorbent of a cryogenic sample transport container having a liquefied gas absorbent by using a liquefied gas supplying tool, the cryogenic sample transport container comprising an outer shell case, a pipe installed inside the outer shell case, an absorbent storage section formed between the outer shell case and the pipe, and the liquefied gas absorbent stored in the absorbent storage section. The outer shell case has a neck portion at an upper portion, the inner diameter of which is smaller than that of the other portions. The absorbent storage section is formed between a portion of the outer shell case that is located lower than the neck portion and the pipe. A gap for exhausting gas in the absorbent storage section is formed between the upper end of the pipe and the neck portion. The liquefied gas supplying tool is provided with a liquefied gas outflow nozzle for outflowing the liquefied gas. The method for supplying liquefied gas to the low-temperature sample transport container includes the steps of: placing the liquefied gas outlet nozzle in the low-temperature sample transport container so that the liquefied gas flowing out from the liquefied gas outlet nozzle flows into the gap; and flowing liquefied gas into the liquefied gas outlet nozzle.

[0014] A seventh aspect of the present invention relates to a liquefied gas supplying instrument, which is a method for supplying liquefied gas to a cryogenic sample transport container according to the sixth aspect, wherein the liquefied gas supplying instrument comprises a plurality of the liquefied gas outflow nozzles and further comprises a tip fixing member for fixing the relative positions of the tips of the plurality of liquefied gas outflow nozzles.

[0015] A method for supplying liquefied gas to a cryogenic sample transport container according to an eighth aspect of the present invention is the method for supplying liquefied gas to a cryogenic sample transport container according to the sixth or seventh aspect, wherein the liquefied gas supplying tool further includes a gas-liquid separator for reducing the pressure of the liquefied gas flowing into the liquefied gas outlet nozzle and separating gas mixed in the liquefied gas. The gas-liquid separator has a container, a cylindrical horn provided in the container, an axial main body provided in the horn, and an exhaust valve. The container has one end through which the main body is fixed, and the other end has a supply port for supplying the liquefied gas flowing out from the horn to the liquefied gas outlet nozzle, and has an exhaust path for discharging gas separated from the liquefied gas. The horn has one end fixed to the main body and the other end open. The main body has a liquefied gas supply passage formed therein, a plurality of nozzles (hereinafter referred to as "upstream nozzles") formed from the liquefied gas supply passage to the outside of the main body so as to radially spray the liquefied gas in a direction that forms an acute angle with respect to the axial direction, and a plurality of nozzles (hereinafter referred to as "downstream nozzles") formed from the liquefied gas supply passage to the outside of the main body so as to radially spray the liquefied gas in a direction that forms an obtuse angle with respect to the axial direction of the main body. The spray directions and spray positions of the upstream nozzles and the downstream nozzles are set so that the liquefied gas sprayed from the upstream nozzles and the liquefied gas sprayed from the downstream nozzles collide with each other within the horn and are diffused in a film shape. The exhaust valve is provided so as to be able to adjust the exhaust flow rate of the gas released to the atmosphere through the exhaust passage.

[0016] A ninth aspect of the present invention relates to a method for supplying liquefied gas to a container for transporting a cryogenic sample, which is a method for supplying liquefied gas to a container for transporting a cryogenic sample according to any one of the first to fourth, sixth, seventh and eighth aspects, and further includes a step of filling the pipe with a space filling member before a step of placing the liquefied gas outflow nozzle in the container for transporting a cryogenic sample.

[0017] A liquefied gas supplying tool according to a tenth aspect of the present invention comprises a plurality of liquefied gas outflow nozzles for outflowing liquefied gas, and a tip fixing member for fixing the relative positions of the tips of the plurality of liquefied gas outflow nozzles.

[0018] A liquefied gas supplying tool according to an eleventh aspect of the present invention includes a liquefied gas outlet nozzle for causing liquefied gas to flow out, and a gas-liquid separator for reducing the pressure of the liquefied gas flowing into the liquefied gas outlet nozzle and separating gas mixed in the liquefied gas. The gas-liquid separator has a container, a cylindrical horn provided in the container, an axial body provided in the horn, and an exhaust valve. The container has one end through which the body is fixed, and the other end has a supply port for supplying the liquefied gas flowing out from the horn to the liquefied gas outlet nozzle, and has an exhaust path for discharging gas separated from the liquefied gas. The horn has one end fixed to the body and the other end open. The main body has a liquefied gas supply passage formed therein, a plurality of nozzles (hereinafter referred to as "upstream nozzles") formed from the liquefied gas supply passage to the outside of the main body so as to radially spray the liquefied gas in a direction that forms an acute angle with respect to the axial direction, and a plurality of nozzles (hereinafter referred to as "downstream nozzles") formed from the liquefied gas supply passage to the outside of the main body so as to radially spray the liquefied gas in a direction that forms an obtuse angle with respect to the axial direction of the main body. The spray directions and spray positions of the upstream nozzles and the downstream nozzles are set so that the liquefied gas sprayed from the upstream nozzles and the liquefied gas sprayed from the downstream nozzles collide with each other within the horn and are diffused in a film shape. The exhaust valve is provided so as to be able to adjust the exhaust flow rate of the gas released to the atmosphere through the exhaust passage. Effect of the Invention

[0019] According to the present invention, the liquefied gas is absorbed into the liquefied gas absorbent in the low-temperature sample transport container in a short time. It can be collected. [Brief description of the drawings]

[0020] [Figure 1] FIG. 2 is a cross-sectional view of a low-temperature sample transport container. [Diagram 2] FIG. 1 is a side view of a liquefied gas supplying tool according to a first embodiment of the present invention. [Diagram 3]FIG. 2 is a bottom view of the liquefied gas supplying tool according to the first embodiment of the present invention. [Figure 4] 1 is a liquefied gas injection device according to a first embodiment of the present invention. [Diagram 5] 1A to 1C are diagrams showing a state in which liquefied gas is injected into the liquefied gas supplying tool according to the first embodiment of the present invention. [Figure 6] 1 is a diagram showing an embodiment of a liquefied gas supplying tool according to a first embodiment of the present invention; [Figure 7] 3A to 3C are diagrams showing another embodiment of the liquefied gas supplying tool according to the first embodiment of the present invention. [Figure 8] FIG. 6 is a side view showing a liquefied gas outflow nozzle and a tip fixing member according to a second embodiment of the present invention. [Figure 9] FIG. 6 is a plan view showing a liquefied gas outflow nozzle and a tip fixing member according to a second embodiment of the present invention. [Figure 10] FIG. 11 is a cross-sectional view showing a state in which a space-filling member is filled in a low-temperature sample transport container. [Figure 11] FIG. 11 is a diagram showing one step of a method for supplying liquefied gas to a low-temperature sample transport container according to a third embodiment of the present invention. [Figure 12] FIG. 2 is a cross-sectional view of a gas-liquid separator. [Figure 13] 13 is an enlarged view of part A in FIG. 12, showing how liquefied gas is ejected from the ejection hole of the main body. FIG. [Figure 14] FIG. 11 is a partial cross-sectional view showing a liquefied gas supplying device according to a fourth embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] First Embodiment Hereinafter, a liquefied gas supplying method for a cryogenic sample transport container and a liquefied gas supplying device according to a first embodiment of the present invention will be described with reference to the drawings. In the embodiment described in this specification, liquefied nitrogen is used as an example of the liquefied gas.

[0022] As shown in FIG. 1, the cryogenic sample transport container 1 includes an outer shell case 11, a pipe 12, an absorbent container 13, a liquefied gas absorbent 14, and the like.

[0023] The outer shell case 11 has an outer wall 111, an inner wall 112, and an upper opening 113. The outer wall 111 forms the outer shape of the cryogenic sample transport container 1 and is a cylindrical shape with a bottom. The inner wall 112 is a cylindrical shape with a bottom and has a smaller radial diameter than that of the outer wall 111. The outer wall 111 and the inner wall 112 are joined at their upper ends, and the inner wall 112 is positioned inside the outer wall 111, so that the outer wall 111 encloses the inner wall 112. The upper opening 113 is an opening provided at the upper end of the inner wall 112 and the outer wall 111, and is used to supply the liquefied gas 2 to the cryogenic sample transport container 1 or to discharge the liquefied gas 2 from the cryogenic sample transport container 1. The inner diameter of the upper opening 113 is large enough to insert and remove the pipe 12 and the liquefied gas absorbent 14.

[0024] The inner wall 112 is shaped so that the inside diameter of the upper portion is smaller than the inside diameter of the other portion, and has a neck portion 16 at the boundary between the upper portion and the other portion.

[0025] An enclosed space 17 is formed between the outer wall 111 and the inner wall 112. The enclosed space 17 is evacuated, so that the inside of the inner wall 112 is insulated from the outside of the outer wall 111. There is a gap between the lower end of the pipe 12 and the bottom of the inner wall 112, and the liquefied gas 2 flows from the lower end of the pipe 12 into the absorbent accommodation section 13 and is absorbed by the liquefied gas absorbent 14.

[0026] Pipe 12 is made of resin or the like, has a cylindrical shape, is inserted into outer case 11 from upper opening 113 of outer case 11, and is erected with its long axis facing upright in the radial center of inner wall 112. Pipe 12 has a space therein for accommodating a sample to be cryopreserved.

[0027] The absorbent accommodation section 13 is a space in which the liquefied gas absorbent 14 is accommodated. The absorbent accommodation section 13 is a space formed between the pipe 12 and the inner wall 112. The inner wall 112 is shaped so that the inner diameter of the upper part is smaller than the inner diameter of the other parts. Therefore, a space is formed between the lower part of the inner wall 112 and the pipe 12, and this becomes the absorbent accommodation section 13.

[0028] The liquefied gas absorbent 14 is, for example, a silicone porous body, and is contained in a small bag, etc. The small bag containing the liquefied gas absorbent 14 has, for example, a vertically elongated shape, and is arranged in the absorbent storage section 13 with multiple small bags lined up in the circumferential direction.

[0029] Between the upper end of the pipe 12 and the neck 16 of the inner wall 112, a gap 18 is formed to exhaust gas generated in the absorbent storage section 13. This is to prevent the gas pressure in the outer shell case 11 from increasing due to volume expansion caused by vaporization of the liquefied gas 2. However, the gap 18 is made smaller than a predetermined size to prevent water droplets generated by condensation from entering the absorbent storage section 13 and being absorbed by the liquefied gas absorbent 14.

[0030] Next, a description will be given of the liquefied gas supplying tool 3. The liquefied gas supplying tool 3 includes a liquefied gas storage container 31 and a liquefied gas outlet nozzle 32, as shown in FIG.

[0031] In this embodiment, the liquefied gas storage container 31 is a bell-shaped container, but the shape is not particularly limited. The liquefied gas storage container 31 has a small diameter portion 310 at the lower end, which is formed with a smaller diameter than other portions, and has an injection opening 311 at the upper end. The liquefied gas storage container 31 also has a nozzle fixing member 321 screwed into a female thread formed on the inner periphery of the small diameter portion 310. The outer shape of the small diameter portion 310 is smaller than the inner diameter of the upper opening 113 of the outer shell case 11.

[0032] The injection opening 311 is used to inject the liquefied gas 2 into the liquefied gas storage container 31.

[0033] The liquefied gas outlet nozzle 32 is constructed using a tubular material, with an upper end inside the liquefied gas storage container 31 and a lower end outside the liquefied gas storage container 31. The liquefied gas outlet nozzle 32 takes in the liquefied gas 2 from the upper end inside the liquefied gas storage container 31 and lets it flow out from the lower end outside the liquefied gas storage container 31. The liquefied gas supplying tool 3 may have only one liquefied gas outlet nozzle 32, but it is preferable that it has multiple liquefied gas outlet nozzles.

[0034] The nozzle fixing member 321 is a member that fixes the liquefied gas outflow nozzle 32 to the liquefied gas storage container 31. The nozzle fixing member 321 has a male thread formed on the outside, and is screwed into a female thread formed on the inner circumference of the small diameter portion 310 formed at the lower end of the liquefied gas storage container 31. The nozzle fixing member 321 has a hole formed therein for passing the liquefied gas outflow nozzle 32 therethrough for connection.

[0035] The structure of the nozzle fixing member 321 is not limited as long as it can fix the liquefied gas outflow nozzle 32 to the liquefied gas storage container 31. Furthermore, if the liquefied gas outflow nozzle 32 is fixed to the liquefied gas storage container 31 by a structure in which a hole is formed in the liquefied gas storage container 31 itself for passing the liquefied gas outflow nozzle 32 through and connecting it, or a structure in which the liquefied gas outflow nozzle 32 and the liquefied gas storage container 31 are integrally formed, the nozzle fixing member 321 may not be necessary.

[0036] In addition, the nozzle fixing member 321 fixes the liquefied gas outflow nozzle 32 so that the liquefied gas outflow nozzle 32 fits within the liquefied gas storage container 31 to a predetermined length in order to keep the liquefied gas outflow nozzle 32 at a low temperature.

[0037] This liquefied gas outflow nozzle 32 outflows the liquefied gas 2 in accordance with the speed at which the liquefied gas absorbent 14 absorbs the liquefied gas 2. Specifically, the maximum flow rate of the liquefied gas 2 outflowing from the liquefied gas outflow nozzle 32 is set to be equal to or not exceeding the amount of the liquefied gas 2 per hour that the liquefied gas absorbent 14 (liquefied gas absorbent in a state where no liquefied gas has been absorbed) can absorb. That is, the nozzle length, the nozzle inner diameter, and the number of nozzles of the liquefied gas outflow nozzle 32 are each set to a predetermined value so that the liquefied gas 2 outflows at such a flow rate. If the liquefied gas 2 is supplied at a rate exceeding the absorption rate of the liquefied gas 2 by the liquefied gas absorbent 14, the liquefied gas 2 will accumulate in the lower part of the low-temperature sample transport container 1, which will increase the effort required for discharge, and this is to prevent this.

[0038] The shape of the liquefied gas outflow nozzle 32 may be, as shown in Figure 3, a shape in which multiple nozzles extend radially laterally when viewed vertically of the liquefied gas storage container 31, or multiple nozzles may be formed in a spiral shape from the center when viewed vertically of the liquefied gas storage container 31.

[0039] Furthermore, among the multiple nozzles, the tips of some of the nozzles may be directed toward the lower end of the pipe 12. The liquefied gas 2 flowing out from the nozzles directed toward the lower end of the pipe 12 enters the absorbent accommodation section 13 through the gap between the lower end of the pipe 12 and the bottom of the inner wall 112, and is absorbed from the lower part of the liquefied gas absorbent 14. This allows the liquefied gas 2 to be supplied simultaneously above and below the liquefied gas absorbent 14.

[0040] The liquefied gas outflow nozzle 32 is capable of changing the direction of the nozzle tip independently of each other. By being able to change the direction of the nozzle tip, even if the nozzles are formed in a radial or spiral shape and it is difficult to insert the nozzles from the upper opening 113 of the outer shell case 11 due to the shape, by changing the direction of the tips of some of the nozzles, the liquefied gas outflow nozzle 32 can be inserted from the upper opening 113 of the outer shell case 11. In addition, by being able to change the direction of the nozzle tip, after the liquefied gas 2 is supplied from above the liquefied gas absorbent 14, the direction of the nozzle tip can be changed to the lower end of the pipe 12, and the liquefied gas 2 can be absorbed from the lower end of the absorbent.

[0041] In the method of supplying liquefied gas to the liquefied gas absorbent 14 of the low-temperature sample transport container 1 according to this embodiment, the gap 18 for exhausting the gas is utilized. That is, as shown in FIG. 6 and FIG. 7, the liquefied gas outlet nozzle 32 is disposed so that the liquefied gas 2 flowing out from the liquefied gas outlet nozzle 32 flows into the gap 18. As for the shape of the gap 18, there are cases where the gap 18 is formed in the vertical direction between the upper end of the pipe 12 and the neck part 16 as shown in FIG. 6, and cases where the gap 18 is formed in the radial direction as shown in FIG. 7. Depending on the shape of the gap 18, the method of supplying the liquefied gas 2 is selected from the following: a method of directly directing the tip of the liquefied gas outlet nozzle 32 to the gap 18, or a method of releasing the liquefied gas 2 by directing the tip of the liquefied gas outlet nozzle 32 toward the inner wall 112 at the top of the gap 18, and flowing the liquefied gas 2 down along the inner wall 112 to flow into the gap 18. As long as the liquefied gas 2 can be appropriately flowed into the gap 18, the direction of the tip of the liquefied gas outlet nozzle 32 when flowing in is not particularly limited. In addition, when the liquefied gas supply device 3 is used with the low-temperature sample transport container 1, it is desirable to use a lid 33 on the upper opening 113 to maintain airtightness between the two and prevent condensation from occurring inside the low-temperature sample transport container 1.

[0042] The liquefied gas supplying tool 3 according to this embodiment desirably uses some kind of fixing device to fix the liquefied gas supplying tool 3 in an optimal position so that the liquefied gas 2 flows into the gap 18. The fixing member has a gripping member for gripping the liquefied gas supplying tool 3 and a support member for supporting the gripping member on the ground. However, the method of fixing the liquefied gas supplying tool 3 is not limited to this, and is not particularly limited as long as the liquefied gas supplying tool 3 can be appropriately fixed.

[0043] According to the above configuration, it is only necessary to pour the necessary amount of liquefied nitrogen from the top of the liquefied nitrogen absorbent, so there is no need to repeatedly add liquefied nitrogen. In addition, since the process of repeatedly adding liquefied nitrogen is not required, the time required for this process can be shortened, and the problem of a large amount of liquefied nitrogen being lost due to evaporation during this process can be avoided.

[0044] In addition, in this embodiment, when injecting liquefied gas 2 into the injection opening 311 of the liquefied gas storage container 31, a liquefied gas injection device 6 is used that can easily pour liquefied gas 2 into the liquefied gas storage container 31, as shown in Figures 4 and 5.

[0045] The liquefied gas injection device 6 includes a support part 61 for supporting a container 7 containing the liquefied gas 2, a cart 62, and a lifting mechanism 63.

[0046] The support part 61 has an L-shaped support base 611 and a gripping part 612 for gripping the vicinity of the neck of the container 7. The upper surface of the short side of the L-shape of the support base 611 has a flat surface on which the container 7 can be placed. The gripping part 612 is a belt-like restraining device provided on the upper side surface of the long side of the support base 611 for gripping the vicinity of the neck of the container 7.

[0047] The cart 62 has a base plate 621 , a base plate 622 , four wheels provided on the lower surface of the base plate 621 , and a support 623 erected on the upper surface of the base plate 622 .

[0048] The support column 623 has, on its upper side surface, a rotating shaft 6231 and a rotation fixing mechanism 6232. The support column 623 can rotatably support the support part 61 by the rotating shaft 6231, and can fix the container 7 via the support part 61 at a preferred rotation angle by the rotation fixing mechanism 6232.

[0049] The lifting mechanism 63 is, for example, a foot-operated hydraulic mechanism that can raise and lower the base plate 622 of the cart 62. With this configuration, even a worker with both hands can easily operate it.

[0050] With the above-described configuration of the liquefied gas injection device 6, the container 7 can be moved by the cart 62 while being supported by the support part 61. In addition, the container 7 can be moved to a position and angle suitable for injecting the liquefied gas 2 into the liquefied gas supplying tool 3 by the support part 61 rotatably supported by the support column 623 and the lifting mechanism 63.

[0051] Next, an example of the work process of this embodiment will be described. First, the cryogenic sample transport container 1 is placed on a weighing scale 8 (step 1). By measuring the weight of the cryogenic sample transport container 1 before and after the supply of the liquefied gas 2 with the weighing scale 8, the amount of the liquefied gas 2 absorbed by the liquefied gas absorbent 14 can be measured.

[0052] Next, the liquefied gas supplying tool 3 is placed on the low-temperature sample transporting container 1. At this time, the liquefied gas outflow nozzle 32 is placed in the low-temperature sample transporting container 1 so that the liquefied gas 2 flows into the gap 18 (step 2). For example, as shown in FIG. 6, when the gap 18 is formed in the vertical direction, the tip of the liquefied gas outflow nozzle 32 is positioned in the gap 18. However, when the width of the gap 18 is larger than the width of the tip of the liquefied gas outflow nozzle 32, it is desirable to position it on approximately the same horizontal plane as the center of the gap 18. Also, for example, as shown in FIG. 7, when the gap 18 is formed in the radial direction, the liquefied gas 2 flowing out from the liquefied gas outflow nozzle 32 is placed so that it hits the inner wall 112 at a position higher than the upper end of the pipe 12. The liquefied gas 2 that hits the inner wall 112 flows into the gap 18 along the inner wall 112. In order to maintain the liquefied gas outflow nozzle 32 in an appropriately positioned state, it is desirable to fix the liquefied gas supplying tool 3 using some kind of fixing device.

[0053] Next, the container 7 containing the liquefied gas 2 is fixed to the support part 61 of the liquefied gas injection device 6 (step 3). Next, the lifting mechanism 63 and the rotating and fixing mechanism 6232 of the liquefied gas injection device 6 are operated to pour the liquefied gas 2 in the container 7 into the liquefied gas storage container 31, as shown by the two-dot chain line in Fig. 5 (step 4). Then, the liquefied gas 2 injected into the liquefied gas storage container 31 flows out from the liquefied gas outflow nozzle 32. The liquefied gas 2 flowing out from the liquefied gas outflow nozzle 32 passes through the gap 18 and is absorbed by the liquefied gas absorbent 14 contained in the absorbent storage part 13.

[0054] The injection of the liquefied gas 2 from the container 7 into the liquefied gas storage container 31 may be performed in one go or in multiple goes. The number of times is determined according to the capacity of the liquefied gas storage container 31, the size of the absorbent material, etc.

[0055] Then, when the value indicated by the weighing scale 8 reaches a predetermined weight, the injection of the liquefied gas 2 from the container 7 into the liquefied gas storage container 31 is stopped, and the liquefied gas 2 remaining in the low-temperature sample transport container 1 that has not been absorbed by the liquefied gas absorbent 14 is discharged. If the discharged low-temperature sample transport container 1 is placed on the weighing scale 8 and the weight exceeds a predetermined weight, it can be said that a sufficient amount of the liquefied gas 2 has been absorbed by the liquefied gas absorbent 14, and the operation is terminated.

[0056] The order of the above-mentioned work steps is not limited to the above-mentioned order, and the order of all steps may be changed as long as it does not impair the object of the present invention. For example, step 2 and step 4 can be interchanged. In this case, it is preferable to provide a valve that prevents the liquefied gas 2 from unintentionally flowing out from the liquefied gas outflow nozzle 32. When this valve is provided, step 4 is performed with the valve closed, and then the valve is opened after step 2 is performed, thereby obtaining the same effect as the embodiment described above.

[0057] <Second embodiment> Hereinafter, a liquefied gas supplying method for a cryogenic sample transport container and a liquefied gas supplying device according to a second embodiment of the present invention will be described with reference to the drawings. In the second embodiment, the cryogenic sample transport container is the same as the cryogenic sample transport container 1 described in the first embodiment.

[0058] As shown in Figures 8 and 9, the liquefied gas supplying device 3A used in the second embodiment includes a plurality of liquefied gas outflow nozzles 32A for outflowing liquefied gas, a tip fixing member 322 for fixing the relative positions of the tips of the plurality of liquefied gas outflow nozzles 32A, and a nozzle fixing member 321A.

[0059] The tips of the plurality of liquefied gas outflow nozzles 32A are fixed to a substantially annular tip fixing member 322. This fixes the relative positions of the tips of the plurality of liquefied gas outflow nozzles 32A, and prevents vibration, swing, etc. of the tips of the liquefied gas outflow nozzles 32A. By preventing vibration, swing, etc. of the tips, the liquefied gas can be accurately discharged from the tips of the liquefied gas outflow nozzles 32A toward the target position. The tips of the plurality of liquefied gas outflow nozzles 32A are arranged on a circumference slightly smaller than the circumference formed by the gap 18 so as to be arranged along the gap 18 of the cryogenic sample transport container 1.

[0060] The tip fixing member 322 supports the tips of the multiple liquefied gas outflow nozzles 32A arranged in the circumferential direction from inside and below the arrangement.

[0061] The tip of the liquefied gas outflow nozzle 32A faces in a direction that makes it easy for the liquefied gas to flow into the gap 18 of the low-temperature sample transport container 1. In this embodiment, the direction of the tip of the liquefied gas outflow nozzle 32A is set so that the liquefied gas flows out in a direction inclined with respect to the radial direction. However, the direction of the tip is not limited to this, and may be in the radial direction. A barb portion 322a extending radially outward is formed at the lower part of the tip fixing member 322. The tip of the liquefied gas outflow nozzle 32A is supported from below by the barb portion 322a. The diameter of the tip fixing member 322 is slightly smaller than the diameter of the upper opening 113 of the low-temperature sample transport container 1. Therefore, the tip fixing member 322 and the tip of the liquefied gas outflow nozzle 32A are easily inserted from the upper opening 113 of the low-temperature sample transport container 1.

[0062] The nozzle fixing member 321A is a member that bundles the upstream ends of the multiple liquefied gas outflow nozzles 32A and connects them to the supply side of the liquefied gas (for example, the liquefied gas storage container 31 of the first embodiment, the gas-liquid separator 34 described later, etc.). In this embodiment, the nozzle fixing member 321A has a male thread formed on the outside, and is screwed into a female thread formed on the supply side of the liquefied gas. The nozzle fixing member 321A has a hole formed therein for passing the liquefied gas outflow nozzle 32A therethrough for connection.

[0063] There are various shapes of cryogenic sample transport containers 1, some of which have a long distance from the upper opening 113 to the gap 18. When the distance from the upper opening 113 to the gap 18 is long, the length of the liquefied gas outflow nozzle 32A may have to be increased. If the length of the liquefied gas outflow nozzle 32A is increased, if there is no tip fixing member 322, the tip of the liquefied gas outflow nozzle 32A is likely to vibrate, shake, etc., and the position of the tip is difficult to determine. However, in this embodiment, the tip fixing member 322 fixes the relative positions of the tips of the multiple liquefied gas outflow nozzles 32A, so the above-mentioned problems rarely occur. In addition, the tip of the liquefied gas outflow nozzle 32A is fixed inside the outer periphery of the barb portion 322a of the tip fixing member 322 and is covered by the barb portion 322a when viewed from below, so that when the liquefied gas outflow nozzle 32A is inserted into the upper opening 113, the tip of the liquefied gas outflow nozzle 32A rarely comes into direct contact with the upper opening 113 and is rarely bent in an undesirable direction.

[0064] In this embodiment, the tip fixing member 322 is formed in a circular ring shape, but the shape is not limited to a circular ring shape. For example, it may be disk-shaped. However, it is preferable that the outer shape of the tip fixing member 322 corresponds to the shape of the upper opening 113 and the gap 18 of the low-temperature sample transport container 1. For example, in this embodiment, the shape of the upper opening 113 and the gap 18 of the low-temperature sample transport container 1 is circular when viewed from above, but if the shape is rectangular, it is preferable that the outer shape of the tip fixing member 322 is rectangular.

[0065] The method for supplying liquefied gas to a container for transporting a low-temperature sample according to the second embodiment is carried out using the above-mentioned liquefied gas supplying instrument 3 A. For example, the method for supplying liquefied gas to a container for transporting a low-temperature sample according to the second embodiment can be obtained by replacing the liquefied gas outlet nozzle 32 and the nozzle fixing member 321 of the liquefied gas supplying instrument 3 (see FIG. 2) in the method for supplying liquefied gas to a container for transporting a low-temperature sample according to the first embodiment with the liquefied gas supplying instrument 3A (see FIG. 8) described in the second embodiment.

[0066] <Third embodiment> Hereinafter, a method for supplying liquefied gas to a cryogenic sample transport container according to a third embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 10, a cryogenic sample transport container 1 used in this embodiment has a hole 12c on the side of an internal pipe 12A.

[0067] The method for supplying liquefied gas to a container for transporting low-temperature samples according to the third embodiment is the same as the method for supplying liquefied gas to a container for transporting low-temperature samples according to the first or second embodiment, except that a space-filling member 121 is filled in the pipe 12A before the step of placing the liquefied gas outflow nozzle 32, 32A in the container for transporting low-temperature samples 1.

[0068] If the space filling member 121 is not filled in the pipe 12A, since the hole 12c is opened in the side surface of the pipe 12A, when the liquefied gas 2 is flowed in through the gap 18, a large amount of the liquefied gas 2 leaks from the hole 12c into the space 12b in the pipe 12A. Most of the liquefied gas 2 leaked into the space 12b in the pipe 12A evaporates without being absorbed by the liquefied gas absorbent 14. However, according to the method for supplying liquefied gas to a container for transporting a low-temperature sample according to the present embodiment, after the space filling member 121 is filled in the space 12b in the pipe 12A, the liquefied gas 2 is flowed in toward the liquefied gas absorbent 14 through the gap 18, so that the amount of the liquefied gas 2 leaking from the hole 12c of the pipe 12A can be suppressed, and the amount of the liquefied gas that evaporates without being absorbed by the liquefied gas absorbent 14 can be reduced.

[0069] The space filling member 121 is formed to match the shape and size of the inside of the pipe 12A, and is fitted into the inside of the pipe 12A with a gap (for example, a gap of 1 mm or less in the diameter direction). The space filling member 121 illustrated in FIG. 10 is composed of a housing 121a, a heat insulating material 121b, and a handle 122. As shown in FIG. 10, it is desirable that the height of the housing 121a is lower than the height of the pipe 12A. By doing so, for example, as shown in FIG. 11 (reference numeral 34 in the figure is a gas-liquid separator to be described later), the tip fixing member 322 described above can be placed on the upper end of the pipe 12A without interfering with the housing 121a. By placing the tip fixing member 322 on the upper end of the pipe 12A, it becomes easy to position the tip of the liquefied gas outflow nozzle 32A with respect to the gap 18. The heat insulating material 121b is filled in the housing 121a, and prevents the housing 121a from deforming due to temperature changes (pressure changes) in the housing 121a. By hooking a finger on handle 122, a user can easily pull out space filling member 121 filling pipe 12A.

[0070] <Fourth embodiment> Hereinafter, a liquefied gas supplying method for a cryogenic sample transport container and a liquefied gas supplying device according to a fourth embodiment of the present invention will be described with reference to the drawings. In the fourth embodiment, the same cryogenic sample transport container 1 as that described in the first or third embodiment can be used as the cryogenic sample transport container.

[0071] As shown in Fig. 14, the liquefied gas supplying tool 3B used in the fourth embodiment is configured by connecting a gas-liquid separator 34 to the upstream side of the liquefied gas supplying tool 3A used in the second embodiment. The gas-liquid separator 34 serves to reduce the pressure of the liquefied gas flowing into the liquefied gas outlet nozzle 32A and separate the gas mixed in the liquefied gas. For example, by providing the gas-liquid separator 34 between a pipe for pressure-feeding the liquefied gas from a liquefied gas storage container (not shown) that stores the liquefied gas at a predetermined pressure and the upstream side of the liquefied gas outlet nozzle 32A, the liquefied gas storage container 31 (see Fig. 2) described in the first embodiment can be eliminated, and the liquefied gas can be continuously supplied to the liquefied gas outlet nozzle 32A.

[0072] If the pipe for pumping the liquefied gas and the upstream side of the liquefied gas outlet nozzle 32A are directly connected, if the supply pressure of the liquefied gas to the liquefied gas outlet nozzle 32A is high, the liquefied gas is supplied from the liquefied gas outlet nozzle 32A into the low-temperature sample transport container 1 at a flow rate exceeding the absorption speed of the liquefied gas absorbent 14. In this case, a large amount of the liquefied gas may not be absorbed by the liquefied gas absorbent 14, but may accumulate at the bottom of the inner wall 112 of the low-temperature sample transport container 1 or overflow from the low-temperature sample transport container 1. In order to reduce the supply pressure of the liquefied gas to the liquefied gas outlet nozzle 32A, it is possible to simply release the pressure between the pipe for pumping the liquefied gas and the upstream side of the liquefied gas outlet nozzle 32A, but in that case, most of the liquefied gas will vaporize, making it impossible to supply an appropriate amount of liquefied gas into the low-temperature sample transport container 1.

[0073] Therefore, the gas-liquid separator 34 in this embodiment has a structure for reducing the pressure of the liquefied gas while suppressing the evaporation of the liquefied gas. Specifically, as shown in Fig. 12, the gas-liquid separator 34 has a housing 341, a horn 342, a main body 343, an exhaust valve 344, and the like.

[0074] The container 341 has a main body 343 penetrating and fixed at one end, and a supply port 341a for supplying the liquefied gas flowing out from the horn 342 to the liquefied gas flow nozzle 32A (inside the nozzle fixing member 321) at the other end. The supply port 341a is provided at the downstream end of the container 341. The container 341 also has an exhaust path 341b on its side for discharging gas separated from the liquefied gas. An exhaust valve 344 is provided in the exhaust path 341b. The exhaust valve 344 can be used to adjust the exhaust flow rate of the gas released to the atmosphere through the exhaust path 341b. An upstream end 341c of the container 341 has a female thread for screwing the main body 343.

[0075] Horn 342 is provided in housing 341, with one end fixed to main body 343 and the other end open. In this embodiment, upstream end 342a of horn 342 is formed with a female thread for threadedly coupling with the upstream end of main body 343. The downstream side of horn 342 is open end 342b.

[0076] The main body 343 is provided in the horn 342. One end of the main body 343 is closed, and a liquefied gas supply passage 343b is formed from a liquefied gas inlet 343a formed at the other end to the inside of the main body 343. The main body 343 has a first upstream ejection hole 343e1 and a first downstream ejection hole 343f1, and a second upstream ejection hole 343e2 and a second downstream ejection hole 343f2. The upstream ejection holes 343e1 and 343e2 are composed of a plurality of ejection holes formed from the liquefied gas supply passage 343b to the outside of the main body 343 so as to eject the liquefied gas radially in a direction forming an acute angle with respect to the axial direction. The downstream side ejection holes 343f1, 343f2 are formed from a plurality of ejection holes formed from the liquefied gas supply passage 343b to the outside of the main body 343 so as to eject the liquefied gas radially in a direction forming an obtuse angle with respect to the axial direction of the main body 343. In this embodiment, a general part having a relatively large diameter and an outer peripheral small diameter part 343c having a relatively small diameter are formed on the outer periphery of the main body 343. The outer peripheral small diameter part 343c is formed in two places, and a pair of inclined surfaces 343d is formed between each outer peripheral small diameter part 343c and the general part. The above-mentioned ejection holes 343e1, 343f1, 343e2, 343f2 are provided on each inclined surface 343d.

[0077] 13 (only the second nozzles 343e2, 343f2 are shown due to space limitations), the upstream nozzles 343e1, 343e2 and the downstream nozzles 343f1, 343f2 have nozzle directions and nozzle positions set so that the liquefied gas 2 ejected from the upstream nozzles 343e1, 343e2 and the liquefied gas 2 ejected from the downstream nozzles 343f1, 343f2 collide with each other within the horn 342 and diffuses in a film shape. The liquefied gas 2 collides with each other within the horn 342 and diffuses in a film shape, forming films 343g within the horn 342. A part of the liquefied gas 2 ejected from the ejection holes 343e1, 343e2, 343f1, and 343f2 remains in the space formed by the membrane 343g, the main body 343, and the horn 342, and then flows down and accumulates at the bottom of the storage body 341, and flows into the liquefied gas outlet nozzle 32A through the supply port 341a. If gas (bubbles) are mixed in the liquefied gas accumulated at the bottom of the storage body 341, the gas rises and is discharged from the exhaust path 341. As a result, the liquefied gas flowing into the liquefied gas outlet nozzle 32A hardly contains gas (bubbles).

[0078] The inner diameter of horn 342 is set to an inner diameter at which the temperature inside horn 342 falls to a predetermined temperature or lower due to the ejected liquefied gas. Here, the predetermined temperature is a temperature at which the ejected liquefied gas does not vaporize (in other words, the temperature at which it re-liquefies). Therefore, most of the liquefied gas 2 ejected from ejection holes 343e1, 343e2, 343f1, and 343f2 flows down from open end 342b of horn 342 while remaining liquid. In addition, of the liquefied gas 2 ejected from the ejection holes 343e1, 343e2, 343f1, and 343f2, some of the gas that was originally mixed in the liquefied gas 2 is liquefied and flows down from the open end 342b of the horn 342, and the unliquefied gas passes through the space between the outer wall of the horn 342 and the inner wall of the storage body 341, as shown by arrow 2G, and is discharged to the outside of the gas-liquid separator 34 via the exhaust path 341b.

[0079] The method for supplying liquefied gas to a container for transporting a low-temperature sample according to the fourth embodiment is carried out by using the liquefied gas supplying device 3B. The method for supplying liquefied gas to a container for transporting a low-temperature sample according to the fourth embodiment is carried out by the steps described below.

[0080] First, the liquefied gas supplying tool 3B is placed on the low-temperature sample transporting container 1. At this time, the liquefied gas outlet nozzle 32A is placed in the low-temperature sample transporting container 1 so that the liquefied gas 2 flows into the gap 18 (step 4-1). This step 4-1 is similar to step 2 described in the first embodiment, and a detailed description thereof will be omitted.

[0081] Next, the liquefied gas 2 is pumped into the body 343 of the gas-liquid separator 34, and the exhaust valve 344 is opened to a predetermined degree. Then, as described above, the liquefied gas is ejected from the ejection holes 343e1, 343e2, 343f1, and 343f2, and while forming a film 343g inside the horn 342, the liquefied gas 2 flows down from the horn 342, accumulates at the bottom of the container 341, and flows out from the tip of the liquefied gas outlet nozzle 32A through the supply port 341a. The liquefied gas 2 that flows out from the tip of the liquefied gas outlet nozzle 32A passes through the gap 18 of the low-temperature sample transport container 1 and is absorbed by the liquefied gas absorbent 14 accommodated in the absorbent accommodation section 13. At this time, by appropriately opening the exhaust valve 344, the supply flow rate of the liquefied gas flowing out from the liquefied gas outflow nozzle 32A can be made to substantially coincide with the absorption speed (absorption amount per time) of the liquefied gas that the liquefied gas absorbent 14 can absorb, and the amount of the liquefied gas 2 that the liquefied gas absorbent 14 can absorb can be absorbed in a short time. Of course, as in the first embodiment, the liquefied gas is supplied from above the liquefied gas absorbent 14, so that the liquefied gas is efficiently absorbed by the liquefied gas absorbent 14.

[0082] Furthermore, according to this embodiment, by adjusting the opening degree of the exhaust valve 344, it is possible to supply an appropriately depressurized liquefied gas to the liquefied gas outflow nozzle 32A, so that liquefied gas can be discharged from the liquefied gas outflow nozzle 32A at a flow rate corresponding to the liquefied gas absorption speed of the liquefied gas absorbent 14 without being affected by the original pressure.

[0083] Furthermore, according to this embodiment, the gas that was mixed in the liquefied gas is almost completely removed by the gas-liquid separator 34, so that the liquefied gas absorbent 14 can absorb liquefied gas with almost no gas mixed in, and furthermore, the maximum amount of liquefied gas 2 can be absorbed in the liquefied gas absorbent 14 in a short period of time.

[0084] <Modification of the first embodiment> In the method of supplying liquefied gas to a low-temperature sample transport container according to the first embodiment, the liquefied gas outflow nozzle 32 and the nozzle fixing member 321 of the liquefied gas supplying instrument 3 (see FIG. 2) can also be replaced with the liquefied gas supplying instrument 3A (see FIG. 8) described in the second embodiment.

[0085] <Modification 1 of the Fourth Embodiment> The liquefied gas supplying device 3B described in the fourth embodiment is configured by connecting a gas-liquid separator 34 to the upstream side of the liquefied gas supplying device 3A used in the second embodiment, but it is also possible to use a liquefied gas supplying device in the fourth embodiment in which a gas-liquid separator 34 is connected instead of the liquefied gas storage container 31 to the upstream side of the liquefied gas outflow nozzle 32 and nozzle fixing member 321 used in the first embodiment.

[0086] <Modification 2 of the Fourth Embodiment> In the fourth embodiment, the ejection holes are formed so that two films 343g are formed in the horn 342, but the number of films 343g is not limited to two. For example, the ejection holes may be formed so that one film 343g or three or more films 343g are formed.

[0087] <Modification 3 of the fourth embodiment> In the method for supplying liquefied gas to a cryogenic sample transport container according to the fourth embodiment, a step of filling the space-filling member 121 in the pipes 12, 12A may be added before the step of placing the liquefied gas outflow nozzle 32A in the cryogenic sample transport container 1 (step 4-2). [Industrial Applicability]

[0088] The present invention relates to a device for absorbing liquefied gas into a liquefied gas absorbent material in a container for transporting low-temperature samples, for example. It can be applied to tools, etc. [Explanation of symbols]

[0089] 1. Low-temperature sample transport container 11 Outer case 111 Exterior Wall 112 Inner wall 113 Top opening 12,12A Pipe 12b Space 121 Space filling material 13 Absorbent material storage section 14 Liquefied gas absorbents 16 neck 17 Closed space 18 Gap 2. Liquefied gas 3,3A,3B Liquefied gas supply equipment 31 Liquefied gas container 311 Injection opening 321 Nozzle fixing member 322 Tip fixing member 32,32A Liquefied gas outlet nozzle 34 Gas-liquid separator 341 Storage unit 341a Supply port 341b Exhaust duct 342 Horn 343 Main Body 343b Liquefied gas supply line 343e1,343e2 Upstream outlet 343f1,343f2 Downstream outlet 343g membrane 344 Exhaust valve 6 Liquefied gas injection equipment 7 containers 8 Weight scale

Claims

1. A method for absorbing liquefied gas into a liquefied gas absorbent of a low-temperature sample transport container having the liquefied gas absorbent, by using a liquefied gas supplying device, comprising the steps of: The low-temperature sample transport container comprises: An outer case, A pipe installed inside the outer shell case; an absorbent housing portion formed between the outer shell case and the pipe; The liquefied gas absorbent is accommodated in the absorbent accommodation section, The outer shell case has a neck portion at an upper portion, the neck portion having an inner diameter smaller than that of other portions, The absorbent storage section is formed between a portion of the outer shell case that is located lower than the neck section and the pipe, A gap is formed between the upper end of the pipe and the neck portion for discharging gas from within the absorbent housing portion, The liquefied gas supply device includes: A liquefied gas storage container; a liquefied gas outlet nozzle for outletting the liquefied gas contained in the liquefied gas storage container, a step of disposing the liquefied gas outlet nozzle in the low-temperature sample transport container so that the liquefied gas flowing out from the liquefied gas outlet nozzle flows into the gap; storing liquefied gas in the liquefied gas storage container; A method for supplying a liquefied gas to a container for transporting a low-temperature sample, comprising:

2. 2. The method for supplying liquefied gas to a low-temperature sample transport container according to claim 1, The method for supplying liquefied gas to a container for transporting a low-temperature sample, wherein the liquefied gas supplying tool has a plurality of the liquefied gas outlet nozzles.

3. 3. The method for supplying liquefied gas to a low-temperature sample transport container according to claim 1, further comprising the steps of: The liquefied gas supply tool is configured to allow the liquefied gas to flow in accordance with a liquefied gas absorption rate at which the liquefied gas absorbent absorbs the liquefied gas. A method for supplying liquefied gas to a container for transporting a low-temperature sample, characterized in that the nozzle length, nozzle inner diameter, and number of the liquefied gas outflow nozzles are set.

4. A method for supplying a liquefied gas to a low-temperature sample transport container according to any one of claims 1 to 3, A method for supplying liquefied gas to a container for transporting a low-temperature sample, characterized in that the liquefied gas outlet nozzle is constructed using a flexible tube material whose tip direction can be changed.

5. A method for absorbing liquefied gas into a liquefied gas absorbent of a low-temperature sample transport container having the liquefied gas absorbent, by using a liquefied gas supplying device, comprising the steps of: The low-temperature sample transport container comprises: An outer case, A pipe installed inside the outer shell case; an absorbent housing portion formed between the outer shell case and the pipe; The liquefied gas absorbent is accommodated in the absorbent accommodation section, The outer shell case has a neck portion at an upper portion, the neck portion having an inner diameter smaller than that of other portions, The absorbent storage section is formed between a portion of the outer shell case that is located lower than the neck section and the pipe, A gap is formed between the upper end of the pipe and the neck portion for discharging gas from within the absorbent housing portion, The liquefied gas supply tool includes a liquefied gas outlet nozzle for outletting the liquefied gas, a step of disposing the liquefied gas outlet nozzle in the low-temperature sample transport container so that the liquefied gas flowing out from the liquefied gas outlet nozzle flows into the gap; flowing liquefied gas into the liquefied gas outlet nozzle; A method for supplying a liquefied gas to a container for transporting a low-temperature sample, comprising:

6. 6. The method for supplying liquefied gas to a cryogenic sample transport container according to claim 5, A method for supplying liquefied gas to a container for transporting low-temperature samples, characterized in that the liquefied gas supplying instrument has a plurality of the liquefied gas outflow nozzles and further has a tip fixing member that fixes the relative positions of the tips of the plurality of liquefied gas outflow nozzles.

7. The method for supplying liquefied gas to a low-temperature sample transport container according to claim 5 or 6, The liquefied gas supply tool further includes a gas-liquid separator that reduces the pressure of the liquefied gas flowing into the liquefied gas outlet nozzle and separates gas mixed in the liquefied gas, The gas-liquid separator includes a housing, a cylindrical horn provided in the housing, a shaft-shaped main body provided in the horn, and an exhaust valve, the container has one end through which the main body is fixed, and the other end is provided with a supply port for supplying the liquefied gas flowing out from the horn to the liquefied gas flow nozzle, and has an exhaust path for discharging gas separated from the liquefied gas, The horn has one end fixed to the body and the other end open, The body includes: A liquefied gas supply passage formed therein; a plurality of nozzle holes (hereinafter referred to as "upstream nozzle holes") formed from the liquefied gas supply passage to the outside of the main body so as to radially spray liquefied gas in a direction forming an acute angle with respect to the axial direction; a plurality of ejection holes (hereinafter referred to as "downstream ejection holes") formed from the liquefied gas supply passage to the outside of the main body so as to eject liquefied gas radially in a direction forming an obtuse angle with respect to the axial direction of the main body, the ejection directions and ejection positions of the upstream ejection hole and the downstream ejection hole are set so that the liquefied gas ejected from the upstream ejection hole and the liquefied gas ejected from the downstream ejection hole collide with each other within the horn and are diffused in the form of a film; The exhaust valve is provided so as to be capable of adjusting the exhaust flow rate of the gas released to the atmosphere through the exhaust path. A method for supplying liquefied gas to a container for transporting a low-temperature sample, comprising:

8. A method for supplying a liquefied gas to a low-temperature sample transport container according to any one of claims 1 to 4, 5, 6 and 7, A method for supplying liquefied gas to a container for transporting cryogenic samples, further comprising the step of filling the pipe with a space-filling material before the step of placing the liquefied gas outlet nozzle in the container for transporting cryogenic samples.

9. a plurality of liquefied gas outlet nozzles for outletting the liquefied gas; A tip fixing member that fixes the relative positions of the tip portions of the plurality of liquefied gas outlet nozzles; Equipped with The plurality of liquefied gas outlet nozzles are arranged in a circumferential manner, and the tip portion has a bent shape, A barb portion is formed on one end of the tip fixing member, the barb portion extending outwardly over the entire circumference, The tip portions of the plurality of liquefied gas outlet nozzles are supported from inside the arrangement by the tip fixing member, and the bent ends of the tip portions are supported by the barb portions. A liquefied gas supply device characterized by:

10. A liquefied gas outlet nozzle for causing the liquefied gas to flow out, and a gas-liquid separator for reducing the pressure of the liquefied gas flowing into the liquefied gas outlet nozzle and separating gas mixed in the liquefied gas, The gas-liquid separator includes a housing, a cylindrical horn provided in the housing, a shaft-shaped main body provided in the horn, and an exhaust valve, the container has one end through which the main body is fixed, and the other end is provided with a supply port for supplying the liquefied gas flowing out from the horn to the liquefied gas flow nozzle, and has an exhaust path for discharging gas separated from the liquefied gas, The horn has one end fixed to the body and the other end open, The body includes: A liquefied gas supply passage formed therein; a plurality of nozzle holes (hereinafter referred to as "upstream nozzle holes") formed from the liquefied gas supply passage to the outside of the main body so as to radially spray liquefied gas in a direction forming an acute angle with respect to the axial direction; a plurality of ejection holes (hereinafter referred to as "downstream ejection holes") formed from the liquefied gas supply passage to the outside of the main body so as to eject liquefied gas radially in a direction forming an obtuse angle with respect to the axial direction of the main body, the ejection directions and ejection positions of the upstream ejection hole and the downstream ejection hole are set so that the liquefied gas ejected from the upstream ejection hole and the liquefied gas ejected from the downstream ejection hole collide with each other within the horn and are diffused in the form of a film; The exhaust valve is provided so as to be capable of adjusting the exhaust flow rate of the gas released to the atmosphere through the exhaust path. A liquefied gas supply device characterized by:

Images