Cell cryopreservation device

1 . A cell cryopreservation device comprising:

a first housing for accommodating a plurality of test tubes;

a second housing for covering the first housing;

central support ribs extending upward from an inner bottom surface of the first housing to support the periphery of the test tubes while coming in contact with side surfaces of the test tubes;

first bottom through holes formed in the centers of locations at which the test tubes are accommodated on a bottom surface of the first housing; and

through holes vertically passing though the centers of the central support ribs.

2 . The cell cryopreservation device of claim 1 , further comprising second bottom through holes disposed between the first bottom through holes.

3 . The cell cryopreservation device of claim 2 , further comprising side support ribs extending from an inner wall surface of the first housing toward the inner side of the first housing to support the test tubes while coming in contact with the side surfaces of the test tubes.

4 . The cell cryopreservation device of claim 3 , wherein each of the side support ribs comprises:

a protrusion having one end fixed to an inner wall surface of the first housing and protruding in a direction perpendicular to the inner wall surface or in a direction diagonal to each corner, that is, a direction at an angle of 45° relative to its corresponding corner; and

a contact portion protruding from a protruding end of the protrusion in two directions perpendicular to the protrusion.

5 . The cell cryopreservation device of claim 2 , wherein the first bottom through holes and the second bottom through holes have a diameter of 3 to 6 mm.

6 . The cell cryopreservation device of claim 1 , wherein the through holes vertically passing through the centers of the central support ribs have a diameter of 1.5 to 3 mm.

7 . The cell cryopreservation device of claim 1 , wherein each of the central support ribs comprises:

a shaft portion extending upward from the bottom surface of the first housing;

protrusions protruding in all four directions to be perpendicular to the side surface of the shaft portion; and

contact portions protruding from ends of the protrusions in both directions perpendicular to a plane of the protrusions.

8 . The cell cryopreservation device of claim 3 , wherein the test tubes are fixed in a state in which the side surfaces of upper and lower portions of the test tubes come into contact with the central support ribs or the side support ribs.

9 . The cell cryopreservation device of claim 8 , wherein each of the test tubes comprises:

a test tube body made of a transparent material;

a lower ring fitted onto a lower portion of the test tube body and having a larger diameter than the test tube body; and

an upper cover coupled to an upper portion of the test tube body and having a larger diameter than the test tube body.

10 . The cell cryopreservation device of claim 2 , wherein the second housing has first top through holes formed in a top surface thereof, and

the first top through holes are disposed above the first and second bottom through holes of the first housing.

11 . The cell cryopreservation device of claim 10 , wherein the first top through holes have a diameter of 3 to 6 mm.

12 . A cell cryopreservation device comprising:

a first housing for accommodating a plurality of test tubes;

a second housing for covering the first housing;

central support ribs extending upward from an inner bottom surface of the first housing to support the periphery of the test tubes while coming in contact with side surfaces of the test tubes;

first bottom through holes formed in the centers of locations at which the test tubes are accommodated on a bottom surface of the first housing;

through holes vertically passing though the centers of the central support ribs,

wherein the second housing comprises first top through holes formed in a top surface thereof, and second top through holes formed in parallel with each of four edges of the top surface of the second housing at a position adjacent to each edge.

13 . The cell cryopreservation device of claim 12 , wherein the second housing further comprises a pair of third top through holes disposed in pairs with each of the second top through holes being interposed therebetween,

wherein the third top through holes are positioned to reach portions of the top and side surfaces of the second housing.