Freezing rack extraction cold insulation device and cold insulation equipment

Abstract

The utility model discloses a freezing rack extraction cold insulation device and cold insulation equipment. A cold insulation barrel of the freezing frame extracting and cold insulation device comprises a barrel body and a top plate, the top plate is movably arranged in the barrel body in the first direction, a cold insulation cavity is defined by the barrel body and the top plate, a channel opening allowing a freezing frame to enter and exit the cold insulation cavity is formed in one end, in the first direction, of the barrel body, and the top plate can drive the freezing frame to enter and exit the cold insulation cavity. According to the freezing frame extraction and cold insulation device, by means of movement of the top plate in the barrel, a freezing frame separated from a cold source can be brought into the cold insulation cavity, in the process that the freezing frame enters the cold insulation cavity, air inside the barrel and outside the top plate can be exhausted, cold air in the cold source and the freezing frame is brought into the cold insulation cavity, and therefore the freezing frame is extracted. Therefore, after the freezing frame is separated from the cold source, the freezing frame can still be subjected to cold insulation for a period of time, a sample in the freezing frame is still stored in a low-temperature environment even if the freezing frame is separated from the cold source, and quality damage caused by rapid temperature rise of the sample is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of cold preservation devices, in particular to a freezing rack extraction cold preservation device and cold preservation equipment. Background Art

[0002] A freezing rack is a frame used to centrally store samples. When samples need to be stored at low temperatures, the freezing rack carrying multiple samples can be placed in a liquid nitrogen tank to preserve the samples in a low-temperature environment. When the freezing rack needs to be removed from the liquid nitrogen tank, due to the high room temperature, if the freezing rack is directly exposed to room temperature after being removed from the liquid nitrogen tank, the temperature of the samples on the freezing rack will rise rapidly, thus affecting the quality of the samples and seriously affecting the experimental results of the samples.

[0003] How to propose a cold-keeping device that can keep the freezing rack cold for a period of time after the freezing rack is extracted from the liquid nitrogen tank is a technical problem that urgently needs to be solved. Utility Model Content

[0004] The first object of the utility model is to provide a freezing rack extraction and cold preservation device, which can keep the freezing rack cold for a period of time after the freezing rack is separated from the cold source, so that the samples in the freezing rack are still kept in a low-temperature environment even if they are separated from the cold source.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] A freezing rack extraction and cold preservation device comprises: a cold preservation cylinder, the cold preservation cylinder comprising a cylinder body and a top plate, the top plate being movably arranged in the cylinder body along a first direction, the cylinder body and the top plate forming a cold preservation cavity, and a passage opening for the freezing rack to enter and exit the cold preservation cavity is formed at one end of the cylinder body in the first direction; wherein, the top plate can drive the freezing rack to enter and exit the cold preservation cavity.

[0007] In some embodiments, the cylinder includes a plurality of side wall panels, and the plurality of side wall panels and the top panel together form the cold preservation cavity.

[0008] In some embodiments, a first guide structure is provided between the cylinder and the top plate, and the first guide structure is used to guide the top plate to move along the first direction.

[0009] In some embodiments, a second guide structure is formed on the inner side of the cylinder to guide the freezing shelf to move along the first direction.

[0010] In some embodiments, the freezing shelf extraction and cold preservation device further includes a power mechanism, which is transmission-connected to the top plate and is used to drive the top plate to move along the first direction.

[0011] In some embodiments, the freezing rack extraction and cold preservation device further comprises a grabbing mechanism, which is fixed on the top plate and is used to grab the freezing rack.

[0012] In some embodiments, the grabbing mechanism includes a grabbing motor and a limiting member, the grabbing motor is fixed on the top plate, the motor shaft of the grabbing motor is connected to the limiting member and can drive the limiting member to rotate, a limiting groove is provided on the freezing rack, and the limiting member can be rotated to a position passing through the limiting groove and a limiting position misaligned with the limiting groove.

[0013] In some embodiments, the freezing rack extraction and cold preservation device further includes a drag chain and a shell provided on the outside of the cylinder, wherein the drag chain is provided outside the cold preservation cavity and is movably provided on the shell.

[0014] In some embodiments, the freezing shelf extraction and cold preservation device further includes at least one first guide wheel group, wherein the first guide wheel group includes two first guide wheels spaced apart, and a guide groove for the drag chain to pass through is formed between the two first guide wheels.

[0015] A second object of the present invention is to provide a cold-keeping device, which can keep the freezing rack cold after the freezing rack is separated from a cold source, thereby improving the quality of samples placed on the freezing rack.

[0016] To achieve this purpose, the present invention adopts the following technical solutions:

[0017] A cold-keeping device comprises a freezing rack and the freezing rack extraction and cold-keeping device.

[0018] Beneficial effects of the utility model:

[0019] The present invention provides a freezing rack extraction and cold preservation device comprising a cold preservation cylinder, the cold preservation cylinder comprising a cylinder body and a top plate, the top plate being movably disposed in the cylinder body along a first direction, the cylinder body and the top plate forming a cold preservation cavity, one end of the cylinder body forming a passage opening for the freezing rack to enter and exit the cold preservation cavity, and the top plate being capable of driving the freezing rack in and out of the cold preservation cavity. The freezing rack extraction and cold preservation device utilizes the movement of the top plate in the cylinder body to bring the freezing rack, which is separated from the cold source, into the cold preservation cavity. During the process of the freezing rack entering the cold preservation cavity, the air in the cylinder body and outside the top plate is discharged, and the cold air in the cold source and the freezing rack is brought into the cold preservation cavity, so that the freezing rack can still be kept cold for a period of time after the freezing rack is separated from the cold source. Even if the sample in the freezing rack is separated from the cold source, it is still kept in a low-temperature environment, thereby avoiding quality damage of the sample due to rapid temperature increase. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1It is a schematic diagram of a cold preservation device provided by an embodiment of the present utility model;

[0021] Figure 2 This is a front view of the cold preservation device provided by an embodiment of the utility model;

[0022] Figure 3 This is a schematic diagram of the cold-insulating device provided by the embodiment of the present utility model after the first tube wall panel is removed;

[0023] Figure 4 It is a schematic diagram of a partial structure of a cold preservation device provided by an embodiment of the present utility model;

[0024] Figure 5 This is a schematic diagram of a freezing rack, a bottom plate, and a second guide structure provided by an embodiment of the present utility model;

[0025] Figure 6 yes Figure 5 Enlarged view of part A.

[0026] In the picture:

[0027] 10. Freezing rack extraction and cold preservation device; 20. Freezing rack; 21. Limiting slot;

[0028] 100, cold storage cylinder; 101, cold storage chamber; 102, entrance and exit; 110, cylinder body; 111, first cylinder wall panel; 112, second cylinder wall panel; 113, third cylinder wall panel; 114, fourth cylinder wall panel; 115, fifth cylinder wall panel; 120, top panel; 130, bottom panel;

[0029] 200, second guide wheel assembly; 210, second guide wheel; 220, second mounting frame; 201, second guide groove; 202, second guide column;

[0030] 300, drag chain;

[0031] 400, first guide wheel assembly; 410, first guide wheel;

[0032] 500, housing; 510, first plate; 520, second plate; 521, avoidance hole. DETAILED DESCRIPTION

[0033] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0034] In the description of the utility model, unless another definite provision and limitation, the term "link", "connect", "fix" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be two elements inside the communication or two element's mutual action relation.For the ordinary skill in the art, the specific meaning of the above-mentioned term in the utility model can be understood according to the specific circumstances.

[0035] In the utility model, unless another definite provision and limitation, the first feature is "on" or "under" the second feature can include the first and second features direct contact, also can include the first and second features are not direct contact but contact through the additional feature between them.Moreover, the first feature is "on", "above" and "on" the second feature includes the first feature is directly above and obliquely above the second feature, or just indicates that the horizontal height of the first feature is higher than the second feature.The first feature is "under", "below" and "under" the second feature includes the first feature is directly below and obliquely below the second feature, or just indicates that the horizontal height of the first feature is less than the second feature.

[0036] In the description of the embodiment, the terms "on", "under", "right", etc. Orientation or positional relationship is based on the orientation or positional relationship shown in the drawing, only for the convenience of description and simplification operation, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the utility model.In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0037] As Figures 1 to 4 The utility model discloses a freezing rack extraction cold keeping device 10 for saving freezing rack 20, and the freezing rack 20 is a frame body for centrally storing sample box needing low temperature preservation, drives sample box into the cold source and carries out long time cold keeping, and the cold source can be liquid nitrogen tank.The freezing rack extraction cold keeping device 10 is generally directly arranged at the outlet of the cold source, and the freezing rack 20 stored in the cold source can directly enter the freezing rack extraction cold keeping device 10 to carry out cold keeping after being taken out, so that the sample in the sample box separated from the cold source can be continuously cold kept for a period of time.

[0038] Specifically, as Figures 1 to 6As shown, the freezing shelf extraction and cold preservation device 10 includes a cold preservation cylinder 100, which includes a cylinder body 110 and a top plate 120. The top plate 120 is movably arranged in the cylinder body 110 along a first direction. The cylinder body 110 and the top plate 120 are surrounded to form a cold preservation cavity 101. One end of the cylinder body 110 in the first direction is formed with a passage for the freezing shelf 20 to enter and exit the cold preservation cavity 101. When the top plate 120 moves in the cylinder body 110 along the first direction, the top plate 120 can drive the freezing shelf 20 to enter and exit the cold preservation cavity 101. In some embodiments, the first direction is as shown in FIG. Figure 1 As shown in direction a, the first direction may be a vertical direction. Of course, in other embodiments, the first direction may also be an inclined direction that forms an angle with the vertical direction or a horizontal direction.

[0039] The freezing rack extraction and cold preservation device 10 utilizes the movement of the top plate 120 in the cylinder 110 to bring the freezing rack 20 that is separated from the cold source into the cold preservation chamber 101. It should be noted that the cold preservation cylinder 100 has good sealing performance, and its working principle is similar to that of a "syringe". In the process of the freezing rack 20 entering the cold preservation chamber 101, the air in the cylinder 110 and outside the top plate 120 can be discharged, and the cold source and the cold air in the freezing rack 20 are brought into the cold preservation chamber 101, so that the freezing rack 20 can still be kept cold for a period of time after being separated from the cold source. Even if the sample in the freezing rack 20 is separated from the cold source, it is still kept in a low-temperature environment, thereby avoiding quality damage of the sample due to rapid temperature increase.

[0040] In some embodiments, the barrel 110 includes a plurality of sidewall panels, each of which extends along a first direction. The plurality of sidewall panels and the top panel 120 together enclose a cold-keeping chamber 101. The number of sidewall panels can be flexibly adjusted according to needs. The barrel 110 formed by the plurality of sidewall panels can be in the shape of a cube, or other regular or irregular shapes. It should be noted that enclosing the barrel 110 to form an irregular structure can form an avoidance structure to avoid other components (such as the slide rails described below), thereby improving the structural compactness of the entire freezing rack extraction and cold-keeping device 10.

[0041] In one embodiment, referring to Figure 1 As shown, the cylinder body 110 includes a first cylinder wall plate 111, a second cylinder wall plate 112, a third cylinder wall plate 113, a fourth cylinder wall plate 114 and two fifth cylinder wall plates 115. The first cylinder wall plate 111, the second cylinder wall plate 112, the third cylinder wall plate 113 and the fourth cylinder wall plate 114 are connected end to end to form a cube shape. The two fifth cylinder wall plates 115 are arranged on the inner side of the fourth cylinder wall plate 114 and are spaced apart in the second direction. The second direction is as shown in FIG. Figure 1 The c direction shown in .

[0042] Optionally, one fifth tube wall plate 115 is disposed at the corner between the fourth tube wall plate 114 and the third tube wall plate 113, and the other fifth tube wall plate 115 is disposed at the corner between the fourth tube wall plate 114 and the first tube wall plate 111. The cross-section of the extraction space formed by the first tube wall plate 111, the second tube wall plate 112, the third tube wall plate 113, the fourth tube wall plate 114, and the two fifth tube wall plates 115 is generally convex. Correspondingly, the top plate 120 is configured in a convex shape to match the cross-sectional shape of the extraction space, thereby improving movement accuracy and sealing.

[0043] Continue to refer to Figure 1 As shown, the cold storage cylinder 100 further includes a bottom plate 130, which is connected to the bottom end of the cylinder body 110 by a connector, welding, or clamping. The bottom plate 130 is provided with a through hole that is directly opposite and connected to the passage opening. It should be noted that the size of the through hole provided in the bottom plate 130 is not less than the size of the passage opening, so that the freezing shelf 20 can pass through the through hole smoothly.

[0044] To reduce the weight of the cold-insulating cylinder 100 and ensure good cold-insulating and sealing properties, the cylinder body 110 is made of ultra-high molecular weight polyethylene. Of course, in other embodiments, the top plate 120 and the bottom plate 130 can also be made of ultra-high molecular weight polyethylene. In addition to ultra-high molecular weight polyethylene, the cylinder body 110, the top plate 120, and the bottom plate 130 can also be made of other high-performance materials, which are not listed here.

[0045] In some embodiments, a first guide structure (not shown) is provided between the cylinder 110 and the top plate 120. The first guide structure is used to guide the top plate 120 to move in the first direction. By providing the first guide structure, the movement accuracy of the top plate 120 in the first direction can be improved.

[0046] In one embodiment, the first guide structure includes a first guide groove and a first guide post. The first guide groove is provided on the inner wall surface of the cylinder 110 along the first direction. The first guide post is provided protrudingly on the side wall surface of the top plate 120. The first guide post is partially disposed within the first guide groove and is movable within the first guide groove. Of course, in other embodiments, the first guide structure may also be a combination of a slide rail and a slider, or a combination of a guide groove and a guide wheel.

[0047] In some embodiments, a second guide structure is formed on the inner side of the cylinder 110 to guide the freezing rack 20 to move in the first direction. By providing the second guide structure, the movement accuracy of the freezing rack 20 in the first direction can be improved. Figure 3 and Figure 4As shown, the second guide structure includes a second guide wheel group 200, the second guide wheel group 200 includes a second guide wheel 210 and a second mounting frame 220 for fixing the second guide wheel 210 on the base plate 130, the second guide wheel 210 abuts against the side wall surface of the freezing rack 20 and can guide the freezing rack 20.

[0048] In one embodiment, the rotation axes of the two second guide wheels 210 included in the second guide wheel group 200 are arranged vertically, and the two second guide wheels 210 respectively abut against the side wall surfaces adjacent to the freezing rack 20 to improve the guiding accuracy. Furthermore, the second guide wheel group 200 is provided with multiple groups in the circumferential direction of the freezing rack 20 to further improve the guiding accuracy. Optionally, when the freezing rack 20 is in the shape of a cube, the second guide wheel group 200 is provided with four groups, and the second guide wheels 210 are provided with eight groups. Each group of the second guide wheel group 200 includes two second guide wheels 210 arranged vertically. The eight second guide wheels 210 can be inserted into the four right-angled corners of the freezing rack 20 to stably guide the freezing rack 20.

[0049] Of course, the second guide structure includes the second guide wheel set 200, and further includes the second guide wheel set 200. Figure 2 As shown, the second guide structure further includes a second guide groove 201 and a second guide post 202. The second guide groove 201 is provided on the barrel 110, and the second guide post 202 is provided on the freezing shelf 20. The second guide post 202 is movably placed in the second guide groove 201. Optionally, the second guide groove 201 and the first guide groove can be the same groove body.

[0050] In some embodiments, the freezing rack extraction and cold preservation device 10 further includes a power mechanism (not shown), which is in transmission connection with the top plate 120 and is used to drive the top plate 120 to move in a first direction. The power mechanism is a mechanism capable of outputting linear motion. In some embodiments, the power mechanism is a linear motor, cylinder, or the like capable of directly outputting linear motion. In some parallel embodiments, the power mechanism includes a lifting motor and a transmission structure capable of converting rotational motion into linear motion. The transmission structure includes, but is not limited to, a gear rack assembly and a screw-nut assembly. The power mechanism can be directly connected to the top plate 120 or connected to another structure that remains fixed to the top plate 120.

[0051] In order to achieve relative fixation between the top plate 120 and the freezing rack 20, the freezing rack extraction and cold preservation device 10 further includes a grabbing mechanism (not shown in the figure), which is fixed to the top plate 120 and is used to grab the freezing rack 20. It should be noted that, driven by the power mechanism, the grabbing mechanism can enter the liquid nitrogen tank and grab the freezing rack 20.

[0052] In some embodiments, the gripping mechanism includes a gripping motor and a limiting member. The gripping motor is fixed to the top plate 120. The motor shaft of the gripping motor is connected to the limiting member and can drive the limiting member to rotate. The freezing rack 20 is provided with a limiting slot 21. The limiting member can rotate to a position passing through the limiting slot 21 and a limiting position offset from the limiting slot 21. Of course, in addition to using a gripping motor and limiting member, an existing mechanical claw can also be used as the gripping mechanism.

[0053] In one embodiment, the limiting groove 21 is a "X" groove, and the limiting member is a "X" block. Of course, in other embodiments, the limiting groove 21 can also be a "M" groove, and the limiting member is a "M" block.

[0054] In one embodiment, the motor housing of the grabbing motor is connected to the output end of the power mechanism, and the power mechanism can simultaneously drive the top plate 120 and the freezing shelf 20 to rise and fall by applying force to the grabbing motor.

[0055] Both the power mechanism and the gripping mechanism need to be connected to the control mechanism through electrical wires. In some embodiments, the freezing rack extraction and cold preservation device 10 also includes a drag chain 300, which is arranged outside the cold preservation chamber 101, and the electrical wires are arranged on the drag chain 300. Such an arrangement can completely isolate the electrical wires outside the cold preservation chamber 101, preventing the electrical wires from malfunctioning due to low temperatures. It should be noted that the freezing rack extraction and cold preservation device 10 also includes a power member (not shown in the figure) that drives the drag chain 300 to move. The power member and the drag chain 300 constitute a drag chain mechanism. The specific structure of the drag chain mechanism is prior art and will not be described in detail here.

[0056] Further, continue to refer to Figures 1 to 3 As shown, the freezing shelf extraction and cold preservation device 10 further includes at least one first guide wheel assembly 400. The first guide wheel assembly 400 includes two first guide wheels 410 spaced apart, and a guide groove is formed between the two first guide wheels 410 for the drag chain 300 to pass through. The provision of the first guide wheel assembly 400 can improve the movement accuracy of the drag chain 300.

[0057] In some embodiments, the first guide wheel group 400 is provided with at least two groups, and the at least two groups of first guide wheel groups 400 are spaced apart in the third direction. Optionally, the third direction is as follows: Figure 1As shown in the direction b in the middle, the freezing shelf extraction and cold preservation device 10 also includes a shell 500 disposed outside the cylinder 110. The shell 500 includes a plurality of plates connected end to end, including a first plate 510 and a second plate 520 connected in a T-shape. The first plate 510 and the second plate 520 are respectively attached to adjacent sidewall plates, and the ends of the first plate 510 and the second plate 520 away from the passage opening in the first direction are higher than the adjacent sidewall plates. All first guide wheels 410 are rotatably connected to the first plate 510. All first guide wheel groups 400 are divided into two parts in the third direction. The two parts of the first guide wheel groups 400 are respectively located on either side of the second plate 520. The second plate 520 is provided with an avoidance hole 521 for allowing the drag chain 300 to pass through, thereby allowing the drag chain 300 to extend from the inside of the shell 500 to the outside of the shell 500.

[0058] The utility model also discloses a cold-keeping device, such as Figures 1 to 3 As shown, the cold preservation device includes a freezing rack 20 and the above-mentioned freezing rack extraction and cold preservation device 10. The cold preservation device can keep the freezing rack 20 cold after the freezing rack 20 is separated from the cold source, which is beneficial to improving the quality of the sample placed on the freezing rack 20.

[0059] Continue to refer to Figure 5 and Figure 6 As shown, the freezing rack 20 is a frame structure formed by assembling plates. It has multiple layers in the first direction, and a space for placing sample boxes is formed between adjacent layers. The space has an opening for the sample boxes to enter and exit. Correspondingly, an entrance and exit 102 is provided on the cold-keeping cylinder 100 at the same side as the opening. The sample boxes can enter and exit the freezing rack 20 through the entrance and exit 102 and the opening. In one embodiment, the entrance and exit 102 is formed between the bottom plate 130 and the first side wall plate. In one embodiment, the shape of the entrance and exit 102 is the same as that of the sample box and the size is adapted thereto. This can reduce the amount of cold air flowing out of the entrance and exit 102, thereby facilitating the maintenance of cold air in the cold-keeping chamber 101.

[0060] In this embodiment, the cold preservation device also includes a control mechanism, which can be a centralized or distributed controller. For example, the controller can be a single single-chip microcomputer or a distributed plurality of single-chip microcomputers. The control program can be run in the single-chip microcomputer to control the power mechanism, the grabbing mechanism, the drag chain 300, etc. to realize their functions respectively.

[0061] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A freezing rack extraction and cold preservation device, characterized in that: include: A cold preservation cylinder (100), the cold preservation cylinder (100) comprising a cylinder (110) and a top plate (120), the top plate (120) being movably arranged in the cylinder (110) along a first direction, the cylinder (110) and the top plate (120) forming a cold preservation cavity (101), and a passage opening for a freezing rack (20) to enter and exit the cold preservation cavity (101) being formed at one end of the cylinder (110) in the first direction; The top plate (120) is capable of driving the freezing shelf (20) to enter and exit the cold-keeping cavity (101).

2. The freezing rack extraction and cold preservation device according to claim 1, characterized in that: The cylinder (110) comprises a plurality of side wall plates, and the plurality of side wall plates and the top plate (120) together form the cold-keeping cavity (101).

3. The freezing rack extraction and cold preservation device according to claim 1, characterized in that: A first guide structure is provided between the cylinder (110) and the top plate (120), and the first guide structure is used to guide the top plate (120) to move along the first direction.

4. The freezing rack extraction and cold preservation device according to claim 1, characterized in that: A second guide structure for guiding the freezing rack (20) to move along the first direction is formed on the inner side of the cylinder (110).

5. The freezing rack extraction and cold preservation device according to claim 1, characterized in that: The freezing shelf extraction and cold preservation device further comprises a power mechanism, which is in transmission connection with the top plate (120) and is used to drive the top plate (120) to move along the first direction.

6. The freezing rack extraction and cold preservation device according to claim 1, characterized in that: The freezing rack extraction and cold preservation device further comprises a grabbing mechanism, which is fixed on the top plate (120) and is used to grab the freezing rack (20).

7. The freezing rack extraction and cold preservation device according to claim 6, characterized in that: The grabbing mechanism comprises a grabbing motor and a limiting member, wherein the grabbing motor is fixed on the top plate (120), the motor shaft of the grabbing motor is connected to the limiting member and can drive the limiting member to rotate, the freezing rack (20) is provided with a limiting groove (21), and the limiting member can rotate to a position passing through the limiting groove (21) and a limiting position misaligned with the limiting groove (21).

8. The freezing rack extraction and cold preservation device according to claim 1, characterized in that: The freezing rack extraction and cold preservation device further comprises a drag chain (300) and a shell (500) arranged outside the cylinder (110); the drag chain (300) is arranged outside the cold preservation cavity (101) and is movably passed through the shell (500).

9. The freezing rack extraction and cold preservation device according to claim 8, characterized in that: The freezing rack extraction and cold preservation device further comprises at least one first guide wheel group (400), wherein the first guide wheel group (400) comprises two first guide wheels (410) arranged at intervals, and a guide groove for the drag chain (300) to pass through is formed between the two first guide wheels (410).

10. A cold preservation device, characterized in that: The invention comprises a freezing rack (20) and the freezing rack extraction and cold preservation device according to any one of claims 1 to 9.

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