CN117268016A

CN117268016A - Low temperature storage device

Info

Publication number: CN117268016A
Application number: CN202311209497.3A
Authority: CN
Inventors: 阳朝辉; 李海冰; 王晓涛; 邱剑
Original assignee: Zhongke Lihan Shenzhen Low Temperature Technology Co ltd
Current assignee: Zhongke Lihan Shenzhen Low Temperature Technology Co ltd
Priority date: 2023-09-18
Filing date: 2023-09-18
Publication date: 2023-12-22

Abstract

The application provides a low-temperature storage device, which comprises a shell, an inner container, a refrigerating assembly, a heat-conducting pipe assembly and a voltage stabilizing assembly, wherein the refrigerating assembly comprises a refrigerator, a first heat preservation cavity is formed in the shell, the inner container and part of the heat-conducting pipe assembly are both positioned in the first heat preservation cavity, and the refrigerator, the voltage stabilizing assembly and the other part of the heat-conducting pipe assembly are all positioned outside the first heat preservation cavity; the cold head of the refrigerator is arranged close to the top of the inner container, the heat-conducting pipe component positioned outside the first heat-preserving cavity is connected with the cold head and is in thermal conduction with the cold head, and the heat-conducting pipe component positioned in the first heat-preserving cavity is attached to the outer wall of the inner container and is in thermal conduction with the inner container; the pressure stabilizing component is provided with a pressure stabilizing cavity, and the heat conducting pipe component is communicated with the pressure stabilizing cavity. The voltage stabilizing component can stabilize the voltage of the heat conducting pipe component. Therefore, the low-temperature storage device can improve the safety of the low-temperature storage device.

Description

Low temperature storage device

Technical Field

The application relates to the field of refrigeration technology, in particular to a low-temperature storage device.

Background

A refrigerator (or referred to as a low temperature storage device) is a refrigeration apparatus commonly used in daily life of people, which can maintain a constant low temperature state of food or other items placed therein, thereby extending the shelf life of the food or other items.

At present, a cascade low-temperature refrigerator is mostly adopted for ultralow-temperature storage of biomass and the like, and an evaporator coil of the cascade low-temperature refrigerator can reach the vicinity of a cooled liner, so that the heat transfer efficiency is high. However, the device is limited by a working temperature zone of physical properties of the refrigeration working medium, has low efficiency in ultralow-temperature operation, large volume vibration and is difficult to reach a temperature zone below-86 ℃. In addition, part of refrigeration working media have the defects of high GWP coefficient, inflammability and the like, and the safety is poor.

The regenerative refrigerator including pulse tube type thermoacoustic refrigerator and Stirling refrigerator adopts helium and other environment friendly working medium, is not affected by phase transition temperature, has temperature below-200 deg.c, and has low vibration noise, etc. However, due to its compact structure, the thermal resistance of heat transfer to the refrigerator liner is great.

In the related art, a refrigerator may include a case, a liner, an insulation layer filled between the case and the liner, a refrigerating assembly, and the like. The refrigerating component can comprise a refrigerating machine and a heat conducting pipe, a heat conducting working medium can be arranged in the heat conducting pipe, and heat can be transferred by utilizing evaporation and condensation (namely gas-liquid phase) of the heat conducting working medium. The cold head of the refrigerator can be in thermal conduction with the heat conducting pipe, the cold head of the refrigerator can be used for cooling the heat conducting working medium in the heat conducting pipe, and the heat conducting pipe can be used for cooling the inner container so as to maintain the inner container in a low-temperature state.

However, the safety of the above refrigerator is to be improved.

Disclosure of Invention

In view of at least one of the above-mentioned technical problems, embodiments of the present application provide a low-temperature storage device, which can improve the safety of the low-temperature storage device.

The embodiment of the application provides the following technical scheme:

the embodiment of the application provides a low-temperature storage device, which comprises: the refrigerator comprises a refrigerator, a first heat preservation cavity is formed in the shell, the inner container and part of the heat conduction pipe assembly are both located in the first heat preservation cavity, and the refrigerator, the pressure stabilizing assembly and the other part of the heat conduction pipe assembly are all located outside the first heat preservation cavity; the cold head of the refrigerator is arranged close to the top of the inner container, the heat-conducting pipe component positioned outside the first heat-preserving cavity is connected with the cold head and is in thermal conduction with the cold head, and the heat-conducting pipe component positioned in the first heat-preserving cavity is attached to the outer wall of the inner container and is in thermal conduction with the inner container; the pressure stabilizing component is provided with a pressure stabilizing cavity, and the heat conducting pipe component is communicated with the pressure stabilizing cavity.

The low-temperature storage device provided by the embodiment of the application can comprise a shell, an inner container, a refrigerating assembly and a heat conducting tube assembly, wherein the refrigerating assembly comprises a refrigerator and a pressure stabilizing assembly, a first heat preservation cavity is formed in the shell, the inner container and part of the heat conducting tube assembly are located in the first heat preservation cavity, and the refrigerator, the pressure stabilizing assembly and the other part of the heat conducting tube assembly are located outside the first heat preservation cavity; the cold head of the refrigerator is arranged close to the top of the inner container, the heat-conducting pipe component positioned outside the first heat-preserving cavity is connected with the cold head and is in thermal conduction with the cold head, and the heat-conducting pipe component positioned in the first heat-preserving cavity is positioned on the outer wall of the inner container and is in thermal conduction with the inner container; the pressure stabilizing component is provided with a pressure stabilizing cavity, and the heat conducting pipe component is communicated with the pressure stabilizing cavity. So set up, when the temperature in the low temperature storage device needs to be adjusted to be high, the heat conduction working medium vaporization volume in the heat pipe assembly increases, thereby lead to the pressure in the heat pipe assembly to increase, gaseous working medium in the heat pipe assembly can get into in the steady voltage chamber, in order to reduce the gaseous working medium in the heat pipe assembly, thereby can reduce the pressure in the heat pipe assembly, in order to avoid the pressure in the heat pipe assembly to change too greatly, thereby can stabilize the pressure in the heat pipe assembly, avoid the heat pipe assembly to break, and prevent the emergence of incident, thereby improved low temperature storage device's security.

In one possible embodiment, the pressure stabilizing assembly comprises a pressure stabilizing member and a capillary tube which are communicated, the pressure stabilizing chamber is positioned in the pressure stabilizing member, and the heat conducting tube assembly is communicated with the pressure stabilizing chamber through the capillary tube.

In one possible implementation mode, the heat conducting pipe assembly comprises a condensation piece and a heat conducting pipe, wherein the condensation piece and part of the heat conducting pipe are positioned outside the first heat preservation cavity, the condensation piece is connected with the cold head, and the other part of the heat conducting pipe is positioned in the first heat preservation cavity and is attached to the outer wall of the inner container;

the condensing part is internally provided with a condensing cavity, the heat conducting pipe comprises a first pipe orifice and a second pipe orifice which are positioned at two ends in the extending direction, the condensing part is provided with a first condensing port and a second condensing port which are communicated with the condensing cavity, the first condensing port is communicated with the first pipe orifice, the second condensing port is communicated with the second pipe orifice, and the condensing cavity is communicated with the capillary;

the horizontal height of the first condensing port is lower than that of the second condensing port, and the first condensing port is positioned at the bottommost part of the condensing cavity.

In one possible embodiment, the cavity bottom wall of the condensation cavity comprises a first end close to the first condensation port and a second end far from the first condensation port, the first end having a lower level than the second end;

and/or a plurality of heat exchange plates are arranged on the top wall of the condensation cavity at intervals;

And/or the outer surface of the condensing piece is provided with a first bonding surface, the outer surface of the cold head is provided with a second bonding surface, and the shapes of the first bonding surface and the second bonding surface are matched and mutually bonded;

and/or the heat conduction pipe comprises a first extension section and a second extension section which are communicated, wherein a first pipe opening is formed at one end of the first extension section, which is away from the second extension section, a second pipe opening is formed at one end of the second extension section, which is away from the first extension section, and one end of the first extension section, which is away from the first pipe opening, and one end of the second extension section, which is away from the second pipe opening, are both positioned in the first heat preservation cavity and are close to the bottom of the liner; the level of the highest point of the first extension section is lower than the level of the highest point of the second extension section.

In one possible implementation mode, the number of the condensation pieces, the heat conducting pipes and the refrigerating components is multiple, and the refrigerating machines of the refrigerating components are arranged in a one-to-one correspondence manner with the condensation pieces;

the heat conducting pipe assembly comprises a distributor assembly, and the condensation cavity of each condensation piece is communicated with each heat conducting pipe through the distributor assembly.

In one possible embodiment, the dispenser assembly comprises a plurality of dispensers, each dispenser being provided with a first dispensing port and a plurality of second dispensing ports in communication with the first dispensing port;

The plurality of dispensers include first dispenser, second dispenser, third dispenser and fourth dispenser, and the first mouth of distribution of first dispenser communicates with the first mouth of distribution of third dispenser, and the first mouth of distribution of first dispenser communicates with the first mouth of condensation one-to-one of a plurality of condensers, and the first mouth of distribution of third dispenser communicates with the first mouth of pipe one-to-one of a plurality of heat pipes, and the first mouth of distribution of second dispenser communicates with the first mouth of distribution of fourth dispenser, and the second mouth of distribution of second dispenser communicates with the second mouth of condensation one-to-one of a plurality of condensers, and the second mouth of distribution of fourth dispenser communicates with the second mouth of pipe one-to-one of a plurality of heat pipes.

In one possible embodiment, the heat conducting pipe assembly is provided with a heat conducting working medium, and when the refrigerator is in a refrigerating state, the ratio of the volume of the heat conducting working medium in a liquid state in the heat conducting pipe assembly to the volume of the heat conducting pipe assembly is greater than or equal to 30%.

In one possible embodiment, the refrigeration assembly includes a thermal insulation member positioned outside the first thermal insulation chamber, the thermal insulation member having a second thermal insulation chamber therein, the coldhead being positioned in the second thermal insulation chamber.

In one possible embodiment, the refrigeration assembly and the pressure stabilizing assembly are both disposed on the same outer sidewall of the housing;

in one possible embodiment, the refrigerator comprises a pulse tube thermo-acoustic refrigerator or a stirling refrigerator.

The construction of the present application, as well as other objects and advantages thereof, will be more readily understood from the description of the preferred embodiments taken in conjunction with the accompanying drawings.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a cryogenic storage device according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of a low-temperature storage device with a protective shell removed according to an embodiment of the present disclosure;

FIG. 3 is a cross-sectional view of a cryogenic storage device provided in an embodiment of the present application;

FIG. 4 is another cross-sectional view of a cryogenic storage device provided in an embodiment of the present application;

Fig. 5 is a schematic structural diagram of a refrigerator, a liner, a pressure stabilizing assembly and a heat conducting tube assembly according to an embodiment of the present application;

FIG. 6 is a schematic structural diagram of a voltage stabilizing assembly and a heat pipe assembly according to an embodiment of the present disclosure;

FIG. 7 is a schematic diagram of a partial structure of a heat pipe assembly according to an embodiment of the present disclosure;

FIG. 8 is a schematic view of a partial structure of a condensing unit according to an embodiment of the present application;

fig. 9 is a schematic structural diagram of a liner and a heat conductive pipe according to an embodiment of the present disclosure;

fig. 10 is a schematic structural view of a plurality of condensation members and a plurality of heat pipes according to an embodiment of the present disclosure, which are connected by a distributor assembly.

Reference numerals illustrate:

100: a low temperature storage device; 111: a housing;

1111: a first thermal insulation chamber; 1112: a protective cover;

120: an inner container; 131: a first heat-retaining layer;

140: a refrigeration assembly; 141: a refrigerating machine;

1411: a cold head; 144: a heat sink;

1451: a first control member; 1452: a second control member;

146: a thermal insulation member; 1461: a vacuum insulation board;

1462: a second heat-insulating layer; 147: a protective shell;

1481: a first mounting member; 1482: a second mounting member;

150: a heat pipe assembly; 151: a condensing member;

151a: a first bonding surface; 1511: a first end;

1512: a second end; 1513: a condensing chamber;

1514: a heat exchange plate; 152: a heat conduction pipe;

1521: a first extension; 1522: a second extension;

153: a gas phase tube; 154: a liquid phase tube;

155: a dispenser assembly; 1551: a first dispenser;

1552: a second dispenser; 1553: a third dispenser;

1554: a fourth dispenser; 160: a voltage stabilizing component;

161: a voltage stabilizer; 1611: a pressure stabilizing cavity;

162: capillary tube.

Detailed Description

In the related art, a refrigerator may include a case, a liner, an insulation layer filled between the case and the liner, a refrigerating assembly, and the like. The refrigerating assembly can comprise a refrigerating machine and a heat conducting pipe, a heat conducting working medium can be arranged in the heat conducting pipe, and heat can be transferred by utilizing evaporation and condensation of the heat conducting working medium. The cold head of the refrigerator can be in thermal conduction with the heat conducting pipe, the cold head of the refrigerator can be used for cooling the heat conducting working medium in the heat conducting pipe, and the heat conducting pipe can be used for cooling the inner container so as to maintain the inner container in a low-temperature state.

However, when the temperature in the refrigerator needs to be increased, the vaporization amount of the heat conducting working medium in the heat conducting pipe is increased, so that the pressure change in the heat conducting pipe is easily caused to be too large, the heat conducting pipe is broken, even a safety accident occurs, and the safety of the refrigerator is reduced.

Based on at least one technical problem described above, the embodiment of the present application provides a low-temperature storage device, where the low-temperature storage device may include a housing, an inner container, a refrigeration assembly and a heat-conducting tube assembly, the refrigeration assembly includes a refrigerator and a voltage stabilizing assembly, a first heat-preserving cavity is provided in the housing, the inner container and a part of the heat-conducting tube assembly are located in the first heat-preserving cavity, and the refrigerator, the voltage stabilizing assembly and another part of the heat-conducting tube assembly are located outside the first heat-preserving cavity; the cold head of the refrigerator is arranged close to the top of the inner container, the heat-conducting pipe component positioned outside the first heat-preserving cavity is connected with the cold head and is in thermal conduction with the cold head, and the heat-conducting pipe component positioned in the first heat-preserving cavity is positioned on the outer wall of the inner container and is in thermal conduction with the inner container; the pressure stabilizing component is provided with a pressure stabilizing cavity, and the heat conducting pipe component is communicated with the pressure stabilizing cavity. So set up, when the temperature in the low temperature storage device needs to be adjusted to be high, the heat conduction working medium vaporization volume in the heat pipe assembly increases, thereby lead to the pressure in the heat pipe assembly to increase, gaseous working medium in the heat pipe assembly can get into in the steady voltage chamber, in order to reduce the gaseous working medium in the heat pipe assembly, thereby can reduce the pressure in the heat pipe assembly, in order to avoid the pressure in the heat pipe assembly to change too greatly, thereby can stabilize the pressure in the heat pipe assembly, avoid the heat pipe assembly to break, and prevent the emergence of incident, thereby improved low temperature storage device's security.

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

The cryogenic storage device 100 provided in an embodiment of the present application will be described below with reference to fig. 1-10.

Embodiments of the present application provide a cryogenic storage device 100, where the cryogenic storage device 100 (e.g., a cryogenic refrigeration storage device) may include, but is not limited to, a refrigerator, freezer, ice maker, etc.

Referring to fig. 1-3, the cryogenic storage device 100 may include a housing 111, a first thermal insulation chamber 1111 may be provided in the housing 111, and the housing 111 may be used to protect structural components located in the first thermal insulation chamber 1111. The casing 111 may have an opening, and the opening may be covered with a protective cover 1112, and the casing 111 may include a bottom wall and a sidewall located between the protective cover 1112 and the bottom wall, and the number of sidewalls of the casing 111 may be plural, and plural sidewalls are connected end to end in sequence. The protective cover 1112 and the housing 111 may be rotatably connected to facilitate a user to take and place the objects to be stored in the liner 120.

Referring to fig. 3, the cryogenic storage device 100 may include a liner 120, the liner 120 may be located in the first thermal insulation chamber 1111, and the liner 120 may have a space for accommodating an object to be stored therein. The object to be stored may include biological material, food, etc. A first heat-insulating layer 131 may be disposed between the housing 111 and the liner 120, where the first heat-insulating layer 131 is beneficial to reduce heat dissipation of the liner 120.

Referring to fig. 3 and 4, the cryogenic storage device 100 may include a refrigeration assembly 140 and a heat transfer pipe assembly 150, the refrigeration assembly 140 may be used to perform a refrigeration function, and the refrigeration assembly 140 may transfer cold to the heat transfer pipe assembly 150 and cool the inner container 120 through the heat transfer pipe assembly 150 to maintain the inner container 120 in a low temperature state. I.e., heat transfer tube assembly 150 may be used to conduct cold between bladder 120 and coldhead 1411. A portion of the heat pipe assembly 150 may be located in the first heat preservation chamber 1111, and the heat pipe assembly 150 located in the first heat preservation chamber 1111 may be located on the outer wall of the inner container 120 and thermally communicate with the outer wall of the inner container 120, so that the cooling capacity of the heat pipe assembly 150 may be transferred to the inner container 120. Another portion of the heat pipe assembly 150 may be located outside the first heat preservation chamber 1111 to facilitate connection to a structure outside the first heat preservation chamber 1111 (e.g., the coldhead 1411 of the refrigerator 141).

For example, a heat conducting medium may be disposed in the heat conducting tube assembly 150, and heat may be transferred by evaporation and condensation of the heat conducting medium. The heat-conducting working medium can be liquefied to form a liquid working medium, and the heat-conducting working medium can be vaporized to form a gaseous working medium. Because the liquid working medium has a higher density than the gaseous working medium, the liquid working medium is easier to move toward the bottom of the heat pipe assembly 150 (i.e., the bottom of the inner container 120), and the gaseous working medium is easier to move toward the top of the heat pipe assembly 150 (i.e., the top of the inner container 120).

Illustratively, the operating temperature of the heat transfer tube assembly 150 may range from-190 ℃ to-130 ℃, e.g., the temperature may be-190 ℃, -170 ℃, -150 ℃, -130 ℃, or any value between-190 ℃ and-130 ℃.

The refrigerating assembly 140 provided in the embodiment of the present application is described below.

Referring to fig. 3 and 4, the refrigerating assembly 140 may include a refrigerator 141, and a cold head 1411 is provided on the refrigerator 141, and the cold head 1411 may be used to cool the heat pipe assembly 150. The refrigerator 141 may be located outside the first heat preservation chamber 1111 so as to facilitate operations such as installation, maintenance, replacement, etc. of the refrigerator 141. The heat transfer tube assembly 150 located outside the first heat preservation chamber 1111 may be connected to the coldhead 1411 and may be in thermal communication with the coldhead 1411. The cold head 1411 may be disposed proximate to a top of the liner 120, and a portion of the heat pipe assembly 150 coupled to the cold head 1411 may be disposed proximate to the top of the liner 120, such that the heat pipe assembly 150 forms a gravity loop based on a gravity reflow principle.

Illustratively, the refrigerator 141 may be a regenerative refrigerator, and the refrigerator 141 may include a pulse tube thermo-acoustic refrigerator, a Stirling refrigerator, or the like. The pulse tube type thermo-acoustic refrigerator has the advantages of high efficiency, small volume, low vibration noise, environmental protection and the like. Pulse tube type thermo-acoustic refrigerator, stirling refrigerator, etc. are advantageous for deep low temperature (-100 ℃ and below) applications.

Illustratively, referring to FIG. 2, the refrigerator 141 may be mounted to the side wall of the housing 111 by a first mount 1481, for example, the first mount 1481 may be a horizontal bracket.

For example, referring to fig. 3, the cold head 1411 may be located at the bottom of the refrigerator 141, thereby facilitating an increase in the cooling effect of the refrigerator 141. Alternatively, referring to fig. 4, the coldhead 1411 may be located at the top of the refrigerator 141. Alternatively, the coldhead 1411 may be located elsewhere in the refrigerator 141. The embodiment of the present application will be described by taking the example that the cold head 1411 is located at the bottom of the refrigerator 141.

Illustratively, when the refrigerator 141 is in a refrigeration state, the ratio of the volume of the liquid working medium in the heat conduction pipe assembly 150 (i.e., the heat conduction working medium in the liquid state) to the volume of the heat conduction pipe assembly 150 may be greater than or equal to 30%, so that adverse effects on the cooling effect caused by too small ratio may be avoided, and a higher temperature at the top of the heat conduction pipe assembly 150 may be avoided, so that the temperature uniformity of the liner 120 is better. For example, the ratio may be any value of 30%, 50%, 60%, 70% or greater than 50%.

For example, referring to fig. 3 and 4, the refrigeration assembly 140 may include a heat retaining member 146, and the heat retaining member 146 may be positioned outside the first heat retaining chamber 1111, thereby facilitating installation, maintenance, replacement, and the like of the heat retaining member 146. The insulating member 146 may have a second insulating cavity therein, and the coldhead 1411 may be positioned in the second insulating cavity, thereby advantageously reducing heat dissipation from the coldhead 1411. A vacuum insulation plate 1461 may be disposed on an inner wall of the second insulation cavity, the vacuum insulation plate 1461 being advantageous to reduce heat exchange between the coldhead 1411 and an external environment to reduce heat dissipation. In the second insulating cavity, a second insulating layer 1462 may be filled between the vacuum insulating plate 1461 and the coldhead 1411, and the second insulating layer 1462 may reduce heat dissipation of the coldhead 1411. For example, the second insulating layer 1462 may be a foamed material. The cold head 1411 may be centered within the second insulating cavity so that the insulating member 146 provides better uniformity of insulation throughout the cold head 1411.

For example, referring to fig. 4, in an embodiment in which the cold head 1411 is located at the top of the refrigerator 141, the heat insulating member 146 is covered on the cold head 1411 at the top of the refrigerator 141, and the top surface of the heat insulating member 146 may be a plane, so that the flatness of the top surface of the overall structure formed by the heat insulating member 146 and the refrigerator 141 is better.

For example, referring to fig. 3 and 4, the refrigeration assembly 140 may include a radiator 144, and the radiator 144 may radiate heat of the refrigerator 141 by liquid cooling. For example, the heat sink 144 may be a tube fin heat sink. The heat sink 144 may be coupled to the side wall of the housing 111 by a second mount 1482 (e.g., a foot). The water outlet of the power pump may be connected to the water inlet of the radiator 144, the water outlet of the radiator 144 may be connected to the water inlet at the hot end of the refrigerator 141, the water outlet G1 (fig. 5) at the hot end of the refrigerator 141 may be connected to the water inlet of the power pump, and the circulation of the cooling liquid between the radiator 144 and the hot end of the refrigerator 141 is achieved by the power pump, so as to achieve the heat dissipation of the hot end of the refrigerator 141.

For example, referring to fig. 2, the refrigeration assembly 140 may include a first control 1451, and the first control 1451 may be electrically connected with the radiator 144 and the refrigerator 141 to control the operating states of the radiator 144 and the refrigerator 141. The cryogenic storage device 100 may include a second control 1452, the second control 1452 may be electrically connected to the first control 1451, the second control 1452 may perform system control on the cryogenic storage device 100, for example, the second control 1452 may be used to control the first control 1451.

For example, referring to fig. 1 and 3, the refrigeration assembly 140 may include a protective shell 147, and the protective shell 147 may protect other structural members that it encases. For example, the refrigeration assembly 140, a portion of the heat pipe assembly 150, the voltage regulator assembly 160, and the second control 1452 may all be located within a protective housing.

The voltage stabilizing assembly 160 provided in the embodiment of the present application is described below.

Referring to fig. 5 and 6, the cryogenic storage device 100 may include a regulated pressure assembly 160, the regulated pressure assembly 160 may have a regulated pressure chamber therein, and the heat pipe assembly 150 may communicate with the regulated pressure chamber 1611. So set up, when the temperature in the low temperature storage device 100 needs to be increased, the vaporization amount of the heat conduction working medium in the heat conduction pipe assembly 150 is increased, so that the pressure in the heat conduction pipe assembly 150 is increased, the gaseous working medium in the heat conduction pipe assembly 150 can enter the pressure stabilizing cavity 1611, so as to reduce the gaseous working medium in the heat conduction pipe assembly 150, thereby reducing the pressure in the heat conduction pipe assembly 150, avoiding the overlarge pressure change in the heat conduction pipe assembly 150, stabilizing the pressure in the heat conduction pipe assembly 150, avoiding the breakage of the heat conduction pipe assembly 150, and preventing the occurrence of safety accidents, thereby improving the safety of the low temperature storage device 100. For example, the pressure stabilizing assembly 160 may be used to maintain the working fluid gas pressure within the heat pipe assembly 150, preventing the liquid working fluid within the heat pipe assembly 150 from evaporating to an excessive pressure after shutdown.

Illustratively, the voltage stabilizing assembly 160 may be located outside the first thermal chamber, thereby facilitating installation, maintenance, replacement, etc. of the voltage stabilizing assembly 160. The pressure stabilizing assembly 160 may include a pressure stabilizing member 161 and a capillary tube 162 (e.g., a stainless steel capillary tube) in communication. The regulated pressure cavity 1611 may communicate with the heat pipe assembly 150 through the capillary tube 162. One end of the capillary tube 162 may be in communication with the regulated pressure chamber 1611, and the other end of the capillary tube 162 may be in communication with the heat transfer tube assembly 150. The capillary 162 has a smaller diameter, so that the capillary 162 has a higher thermal resistance, and thus leakage of cold can be reduced.

The heat conducting pipe 152, the condensation member 151, the capillary 162 and the voltage stabilizing member 161 may form a closed heat conducting working medium circulation system. The heat conducting working medium may include at least one of nitrogen and oxygen, so that the influence on the environment may be avoided.

For example, a portion of capillary tube 162 may be inserted into insulating member 146, a portion of capillary tube 162 located in insulating member 146 may be in communication with condensation chamber 1513, another portion of capillary tube 162 may be located outside of insulating member 146, and another portion of capillary tube 162 may be in communication with plenum chamber 1611. The pressure stabilizing member 161 may be located outside the thermal insulating member 146, i.e., the pressure stabilizing member 161 may be in a room temperature environment, and in addition, the pressure stabilizing member 161 may be disposed adjacent to the thermal insulating member 146.

For example, the volume of the pressure stabilizing chamber 1611 may be larger than the volume of the heat conducting tube assembly 150, so that it may better stabilize the pressure in the heat conducting tube assembly 150, and may prevent the heat conducting tube assembly 150 from having a larger internal pressure change due to a larger temperature difference in the low-temperature working state and the non-working state, thereby improving the safety. The ratio of the volume of the pressure stabilizing chamber 1611 to the volume of the heat transfer tube assembly 150 may range from 6 to 10, so that the pressure stabilizing performance of the pressure stabilizing member 161 may be prevented from being affected by the excessively small ratio, and the excessively large volume of the pressure stabilizing member 161 may be prevented from being caused by the excessively large ratio, thereby facilitating the miniaturization of the low temperature storage device 100. For example, the ratio may be 6, 7, 8, 9, 10 or any number between 6 and 10.

The following describes the heat pipe assembly 150 provided in the embodiment of the present application.

Referring to fig. 3 and 7, the heat conductive pipe assembly 150 may include a condensing member 151 and a heat conductive pipe 152, and the condensing member 151 may have a condensing chamber 1513 therein, and the condensing member 151 may be located outside the first heat-preserving chamber 1111, thereby facilitating operations such as installation and maintenance replacement of the condensing member 151, and also facilitating connection of the condensing member 151 with the cold head 1411 to achieve heat conduction between the cold head 1411 and the condensing member 151. For example, the cold head 1411 and the condensing member 151 may be coupled by a fixing member (e.g., a screw) such that the cold head 1411 and the condensing member 151 may achieve good contact. A portion of the heat pipe 152 may be located outside the first heat preservation chamber 1111, and the heat pipe 152 located outside the first heat preservation chamber 1111 may communicate with the condensation chamber 1513. The other part of the heat conducting tube 152 may be located in the first heat preservation cavity 1111, and the heat conducting tube 152 located in the first heat preservation cavity 1111 may be attached to the outer wall of the inner container 120, so as to achieve heat conduction between the heat conducting tube 152 and the inner container 120.

For example, the heat pipe 152 may be made of a highly heat conductive material, and the material of the heat pipe 152 may include copper or other materials. The inner wall of the heat pipe 152 may be smooth.

Referring to fig. 7 and 9, the heat transfer pipe 152 may include first and second nozzles B1 and B2 at both ends of the extension direction, and both the first and second nozzles B1 and B2 may be located outside the first heat preservation chamber 1111. The condensing unit 151 may be provided with a first condensing port A1 and a second condensing port A2, where the first condensing port A1 and the second condensing port A2 may both be communicated with the condensing chamber 1513, the first condensing port A1 may be communicated with the first pipe orifice B1, and the second condensing port A2 may be communicated with the second pipe orifice B2. Condensation chamber 1513 may be in communication with capillary 162 (fig. 5), at which time heat transfer tube 152, condensation chamber 1513, capillary 162, and regulated pressure chamber 1611 are in communication.

The first condensation port A1 may be used as an outlet of a liquid working medium, and the second condensation port A2 may be used as an inlet of a gaseous working medium. The gaseous working medium in the condensation chamber 1513 can be cooled by the cold head 1411 to form a liquid working medium, the liquid working medium in the condensation chamber 1513 can enter the heat-conducting tube 152 after passing through the first condensation port A1 and the first tube port B1, and the gaseous working medium in the heat-conducting tube 152 can enter the condensation chamber 1513 after passing through the second tube port B2 and the second condensation port A2. The first condensation port A1 may have a lower level than the second condensation port A2, and the first condensation port A1 may be located at the bottom of the condensation chamber 1513, so that a liquid working medium with a higher density may pass through the first condensation port A1, and the heat conduction pipe assembly 150 may form a gravity loop based on the gravity backflow principle.

The condensing unit 151 provided in the embodiment of the present application is described below.

For example, referring to fig. 7, the cavity bottom wall of condensation cavity 1513 may include a first end 1511 proximate first condensation port A1 and a second end 1512 distal first condensation port A1, and the first end 1511 may have a lower level than the second end 1512, such that the cavity bottom wall of condensation cavity 1513 has a flow directing effect to facilitate gravity-induced backflow of liquid working fluid in condensation cavity 1513 into heat transfer tube 152.

For example, referring to fig. 7 and 8, a plurality of heat exchange fins 1514 may be disposed on the cavity wall of the condensation cavity 1513 at intervals, where the area of the heat exchange fin 1514 is larger, so that the contact area between the cavity wall of the condensation cavity 1513 and the gaseous working medium may be increased, thereby increasing the heat exchange area of the condensation cavity 1513, improving the heat exchange efficiency, so as to cool the gaseous working medium faster, and being beneficial to improving the cooling efficiency of the gaseous working medium. For example, heat exchange fins 1514 may be positioned on the top wall of condensation chamber 1513 with a lesser density of gaseous working fluid tending to move toward the top wall of condensation chamber 1513 to facilitate contact of gaseous working fluid with heat exchange fins 1514. And/or heat exchange plates 1514 may be disposed at the bottom wall of condensation chamber 1513, and the direction of the gap between two adjacent heat exchange plates 1514 may be identical to the direction from first end 1511 to second end 1512, so that heat exchange plates 1514 may be prevented from affecting the flow of liquid working medium. Of course, heat exchange fins 1514 may be disposed on other chamber walls of condensation chamber 1513.

For example, referring to fig. 5 and 7, the outer surface of the condensing part 151 may have a first bonding surface 151a, the outer surface of the cold head 1411 may have a second bonding surface, and the shapes of the first bonding surface 151a and the second bonding surface may be adapted and bonded to each other, thereby facilitating an increase in the contact area of the first bonding surface 151a and the second bonding surface, and facilitating an increase in heat exchange efficiency between the cold head 1411 and the condensing part 151. For example, both the first bonding surface 151a and the second bonding surface may be planar, so that the difficulty in preparing the first bonding surface 151a and the second bonding surface is reduced. Alternatively, both the first bonding surface 151a and the second bonding surface may be curved, so that the contact area between the first bonding surface 151a and the second bonding surface may be further increased. Of course, the first bonding surface 151a and the second bonding surface may have other shapes. For example, the first bonding surface 151a may be located at an outer top surface of the condensation member 151, the second bonding surface may be located at an outer bottom surface of the cold head 1411, or the first bonding surface 151a may be located at an outer bottom surface of the condensation member 151, and the second bonding surface may be located at an outer top surface of the cold head 1411.

The heat pipe 152 provided in the embodiment of the present application is described below.

Referring to fig. 7 and 9, the heat conductive pipe 152 may include a first extension 1521 and a second extension 1522, which are connected, the first extension 1521 may be close to the first pipe orifice B1, the second extension 1522 may be close to the second pipe orifice B2, a first pipe orifice B1 may be formed at an end of the first extension 1521 facing away from the second extension 1522, a second pipe orifice B2 may be formed at an end of the second extension 1522 facing away from the first extension 1521, and both an end of the first extension 1521 facing away from the first pipe orifice B1 and an end of the second extension 1522 facing away from the second pipe orifice B2 may be located in the first heat preservation chamber 1111 and disposed near a bottom of the inner container 120. The level of the highest point of the first extension 1521 may be lower than the level of the highest point of the second extension 1522, thereby facilitating movement of liquid working medium along the first extension 1521 toward the bottom of the liner 120 and movement of gaseous working medium along the second extension 1522 toward the condensation chamber 1513, which may facilitate formation of a gravity loop. For example, the first extension 1521 may form at least a portion of the liquid phase section, e.g., the first extension 1521 may be an inlet of the liquid phase section and the portion of the second extension 1522 proximate the second nozzle B2 may form an outlet of the gas phase section. The side wall of the housing 111 may have a hole, and the first extension 1521 and the second extension 1522 may be disposed through the hole.

Referring to fig. 5, 6 and 9, a portion of the first extension 1521 located in the first insulating chamber 1111 may be linear, and both ends of the linear portion of the first extension 1521 may be near the top and bottom of the liner 120, respectively. A portion of the second extension 1522 may be attached to the liner 120, and the portion of the second extension 1522 may be curved. So set up, the length of this part first extension 1521 that is the straight line is shorter, can shortest route directly reaches the bottom of heat pipe 152 to can be faster will be through the liquid working medium of cold head 1411 cooling follow first extension 1521 and convey the bottom to inner bag 120 from the top of inner bag 120, thereby can accelerate the cooling to inner bag 120. In addition, the second extension 1522 has a longer length and a larger contact area with the liner 120, so that heat exchange with the liner 120 can be increased, and cooling efficiency of the liner 120 can be improved. For example, referring to fig. 6, the second extension 1522 may be attached to the liner 120 from the bottom of the liner 120 and spirally wound around the outside of the liner 120. Alternatively, referring to fig. 9, a second extension 1522 may be serpentine and located on the same side wall of the bladder 120.

For example, referring to fig. 1, 2 and 5, the refrigeration assembly 140 and the pressure stabilizing assembly 160 may be disposed on the same outer sidewall (e.g., the first sidewall) of the housing 111, for example, the refrigerator 141, the radiator 144, the first control member 1451, the heat insulating member 146, the pressure stabilizing member 161, the capillary tube 162, and the like may be disposed on the same outer sidewall of the housing 111, so that the volume occupied by the refrigeration assembly 140 and the pressure stabilizing assembly 160 is relatively large due to the structural members of the refrigeration assembly 140 and the pressure stabilizing assembly 160 being disposed on different outer sidewalls of the housing 111, and the refrigeration assembly 140 and the pressure stabilizing assembly 160 may have a compact structure and a relatively high space utilization, which is beneficial to reducing the overall volume of the low-temperature storage device 100. For example, the radiator 144 may be disposed at the bottom of the first sidewall, the refrigerator 141 may be located at the top of the first sidewall, and the first control 1451 may be located between the cold head 1411 of the refrigerator 141 and the radiator 144. In addition, the second control member 1452 may be disposed at an end of the first sidewall near the protective cover 1112 and may be located at an edge of the first sidewall.

The operation of one refrigeration assembly 140 provided in an embodiment of the present application is described below.

Before normal operation, the inside of the low temperature storage device 100 is at ambient temperature, after the low temperature storage device 100 is powered on and started, the refrigerator 141 starts to operate, the temperature of the cold head 1411 of the refrigerator 141 is reduced, and the temperature of the condensation piece 151 at the first bonding surface 151a is reduced by heat conduction. The gaseous working fluid in condensation chamber 1513 is liquefied and flows down the liquid phase section of heat transfer tube 152 to the bottommost portion of heat transfer tube 152. The gaseous working medium in the condensation chamber 1513 is liquefied and the pressure drops, the gaseous working medium in the heat conduction pipe 152 flows to the condensation chamber 1513 through the gas phase section of the heat conduction pipe 152, and the gaseous working medium in the pressure stabilizing chamber 1611 flows to the condensation chamber 1513 through the capillary tube 162. The liquid working medium accumulated at the bottom of the heat conducting tube 152 absorbs heat from the inner container 120 and is vaporized, and flows back to the condensation chamber 1513 along the heat conducting tube 152 through the gas phase section to be liquefied again. Along with the continuous advancing of the liquefaction process, the liquid working medium accumulated at the bottom of the heat conducting tube 152 is continuously increased, the liquid level is continuously raised along the coiling direction of the heat conducting tube 152, when the liquefaction rate of the refrigerator 141 and the vaporization amount of the working medium generated by the heat load of the low-temperature storage device 100 reach balance, the temperature in the liner 120, the volume of the liquid working medium in the heat conducting tube 152, the pressure in the heat conducting tube 152 and the pressure in the pressure stabilizing member 161 reach a stable value and are in a balanced state, the gaseous working medium in the pressure stabilizing member 161 and the gaseous working medium in the capillary 162 in the normal temperature environment no longer flow, and a stable temperature gradient is formed at two ends of the capillary 162. When the temperature in the liner 120 needs to be increased, the input power of the refrigerator 141 can be reduced, the refrigerating capacity of the refrigerator 141 is reduced, and the last equilibrium state is broken. The vaporization amount of the working medium generated by the thermal load of the low-temperature storage device 100 exceeds the liquefying speed of the refrigerator 141 to the gaseous working medium, the pressure in the heat conducting pipe 152 increases, and the gaseous working medium flows back into the pressure stabilizing cavity 1611 through the capillary tube 162 until the new balance is established.

Illustratively, the number of refrigeration assemblies 140 may be at least one. When the number of the refrigerating units 140 is plural, the temperature of the liner 120 can be increased.

The refrigerating assembly 140 provided in the embodiment of the present application is described in detail below.

Each refrigeration assembly 140 may include a refrigerator 141, a heat retaining member 146, a first control 1451, and a heat sink 144, and each of the first controls 1451 of the plurality of refrigeration assemblies 140 may be electrically connected to the same second control 1452. The number of the condensation pieces 151 and the heat transfer pipes 152 in the heat transfer pipe assembly 150 may be plural, and the number of the heat transfer pipes 152 may be the same as or different from the number of the condensation pieces 151. The refrigerators 141 of the plurality of refrigerating units 140 may be disposed in one-to-one correspondence with the plurality of condensing units 151. The number of the condensation pieces 151 may be the same as the number of the pressure stabilizing assemblies 160, and the plurality of condensation pieces 151 may be in one-to-one correspondence with the plurality of pressure stabilizing assemblies 160.

Taking the number of sidewalls of the liner 120 as four as an example. In some examples, the same heat pipe 152 may be disposed around the outside of the four sidewalls of the liner 120. In other examples, the same heat pipe 152 may be located only on the same side wall of the liner 120, and one or more heat pipes 152 may be disposed on the same side wall of the liner 120. For example, referring to fig. 10, the number of the heat conductive pipes 152 may be 4, the four sidewalls of the inner container 120 may include a front sidewall, a rear sidewall, a left sidewall, and a right sidewall, and the four heat conductive pipes 152 may be a front heat conductive pipe, a rear heat conductive pipe, a left heat conductive pipe, and a right heat conductive pipe, respectively.

Illustratively, referring to FIG. 10, the heat transfer tube assembly 150 includes a distributor assembly 155, and the condensation chambers 1513 of each condensation member 151 may communicate with each heat transfer tube 152 through the distributor assembly 155. For example, the first condensation port A1 of each condensation member 151 may communicate with the first tube port B1 of each heat transfer tube 152 through the distributor assembly 155, and the second condensation port A2 of each condensation member 151 may communicate with the second tube port B2 of each heat transfer tube 152 through the distributor assembly 155.

For example, the dispenser assembly 155 may include a plurality of dispensers, each provided with a first dispensing port and a plurality of second dispensing ports, the first dispensing port of the same dispenser communicating with the plurality of second dispensing ports. The plurality of distributors may include a first distributor 1551, a second distributor 1552, a third distributor 1553 and a fourth distributor 1554, and the first condensation port A1 of each condensation member 151 and the first tube port B1 of each heat transfer tube 152 may communicate through the first distributor 1551 and the third distributor 1553. The second condensation port A2 of each condensation member 151 and the second tube port B2 of each heat transfer tube 152 may communicate through the second distributor 1552 and the fourth distributor 1554.

The first distribution port C1 of the first distributor 1551 may be communicated with the first distribution port E1 of the third distributor 1553, the second distribution ports C2 of the first distributor 1551 are in one-to-one correspondence with the first condensation ports A1 of the plurality of condensation members 151, and the second distribution ports E2 of the third distributor 1553 may be in one-to-one correspondence with the first pipe ports B1 of the plurality of heat pipes 152, so that the liquid working media in the plurality of condensation members 151 are all converged in the first distributor 1551, and then distributed in the first extension sections 1521 of the plurality of heat pipes 152 through the third distributor 1553. In addition, the first distribution port D1 of the second distributor 1552 may be in communication with the first distribution port F1 of the fourth distributor 1554, the plurality of second distribution ports D2 of the second distributor 1552 may be in one-to-one communication with the second condensation ports A2 of the plurality of condensation pieces 151, and the plurality of second distribution ports F2 of the fourth distributor 1554 may be in one-to-one communication with the second pipe orifices B2 of the plurality of heat pipes 152, so that the gas working mediums of the plurality of heat pipes 152 are all converged in the fourth distributor 1554 through the respective second extension sections 1522 and distributed to the plurality of condensation pieces 151 through the second distributor 1552. By means of the arrangement, the plurality of refrigeration components 140 can accelerate the temperature reduction of the low-temperature storage device 100, at least one refrigeration component 140 can be closed under the condition that the cooling capacity requirement is small, and at least one refrigeration component 140 is operated, so that the energy consumption of the system can be reduced, and the operation reliability of the system can be improved.

For example, a first distributor 1551 may be in communication with each condensation chamber 1513 via liquid phase tube 154 and a second distributor 1552 may be in communication with each condensation chamber 1513 via vapor phase tube 153.

Referring to fig. 10, the number of the refrigerating units 140 is two, the number of the side walls of the inner container 120 is four, and one side wall of the inner container 120 corresponds to one heat pipe 152. The first and second dispensers 1551, 1552 may be three-way valves. The heat conduction pipe assembly 150 is cooled by using two refrigeration assemblies 140 which can be backed up each other, two liquid phase pipes 154 can be connected to a third distributor 1553 (liquid working medium distributor) through a first distributor 1551, and two gas phase pipes 153 can be connected to a fourth distributor 1554 (gas working medium distributor) through a second distributor 1552. The third distributor 1553 is communicated with the liquid phase sections (i.e. the first extension sections 1521) arranged on the four side walls of the inner container 120, the fourth distributor 1554 is communicated with the gas phase sections (i.e. the second extension sections 1522) arranged on the four side walls of the inner container 120, and the four heat conducting pipes 152 are connected in parallel, so that the gas resistance is smaller, and the heat exchange effect is better. In the stage of starting the low-temperature storage device 100 to cool down, the cold energy requirement is large, and the two refrigeration components 140 work simultaneously, so that the cooling process of the low-temperature storage device 100 can be accelerated, when the low-temperature storage device 100 reaches the maintaining stage after the target temperature, the cold energy requirement is small, only one refrigeration component 140 can be operated, and the other refrigeration component 140 is used as a backup, so that the energy consumption of the system can be reduced, and the operation reliability of the system is improved.

It should be noted that, the numerical values and the numerical ranges referred to in the embodiments of the present application are approximate values, and may have a certain range of errors under the influence of the manufacturing process, and those errors may be considered to be negligible by those skilled in the art.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A cryogenic storage device, comprising: the refrigerator comprises a refrigerator, a first heat preservation cavity is formed in the casing, the inner container and part of the heat conduction pipe assembly are both located in the first heat preservation cavity, and the refrigerator, the pressure stabilizing assembly and the other part of the heat conduction pipe assembly are all located outside the first heat preservation cavity;

The cold head of the refrigerator is arranged close to the top of the inner container, the heat-conducting pipe component positioned outside the first heat-preserving cavity is connected with the cold head and is in thermal conduction with the cold head, and the heat-conducting pipe component positioned in the first heat-preserving cavity is attached to the outer wall of the inner container and is in thermal conduction with the inner container;

the pressure stabilizing component is provided with a pressure stabilizing cavity, and the heat conducting pipe component is communicated with the pressure stabilizing cavity.

2. The cryogenic storage device of claim 1, wherein the plenum assembly comprises a plenum and a capillary tube in communication, the plenum being located in the plenum, the thermally conductive tube assembly in communication with the plenum through the capillary tube.

3. The cryogenic storage device of claim 2, wherein the heat pipe assembly comprises a condensation member and a heat pipe, wherein the condensation member and a portion of the heat pipe are both located outside the first thermal insulation cavity, the condensation member is connected to the cold head, and another portion of the heat pipe is located in the first thermal insulation cavity and is attached to the outer wall of the inner container;

the condensing part is internally provided with a condensing cavity, the heat conducting pipe comprises a first pipe orifice and a second pipe orifice which are positioned at two ends of the extending direction, the condensing part is provided with a first condensing port and a second condensing port which are communicated with the condensing cavity, the first condensing port is communicated with the first pipe orifice, the second condensing port is communicated with the second pipe orifice, and the condensing cavity is communicated with the capillary tube;

The horizontal height of the first condensation port is lower than that of the second condensation port, and the first condensation port is positioned at the bottommost part of the condensation cavity.

4. A cryogenic storage device according to claim 3, wherein the cavity bottom wall of the condensation cavity comprises a first end proximate to the first condensation port and a second end distal to the first condensation port, the first end having a lower level than the second end;

and/or the heat conduction pipe comprises a first extension section and a second extension section which are communicated, wherein the first pipe orifice is formed at one end of the first extension section, which is away from the second extension section, the second pipe orifice is formed at one end of the second extension section, which is away from the first extension section, and one end of the first extension section, which is away from the first pipe orifice, and one end of the second extension section, which is away from the second pipe orifice, are both positioned in the first heat preservation cavity and are close to the bottom of the inner container; the level of the highest point of the first extension section is lower than the level of the highest point of the second extension section.

5. The cryogenic storage device of claim 3 or 4, wherein the number of condensation members, the heat pipes and the refrigeration assemblies is plural, and the refrigerators of the plural refrigeration assemblies are arranged in one-to-one correspondence with the plural condensation members;

the heat conduction pipe assembly comprises a distributor assembly, and the condensation cavity of each condensation piece is communicated with each heat conduction pipe through the distributor assembly.

6. The cryogenic storage device of claim 5, wherein the dispenser assembly comprises a plurality of dispensers, each of the dispensers being provided with a first dispensing port and a plurality of second dispensing ports in communication with the first dispensing port;

the plurality of dispensers include first dispenser, second dispenser, third dispenser and fourth dispenser, the first mouth of distribution of first dispenser with the first mouth of distribution of third dispenser communicates, the second mouth of distribution of first dispenser with a plurality of the first condensation mouth one-to-one of condensation piece communicates, the second mouth of distribution of third dispenser with a plurality of the first mouth of pipe one-to-one of heat conduction pipe communicates, the first mouth of distribution of second dispenser with the first mouth of distribution of fourth dispenser communicates, the second mouth of distribution of second dispenser with a plurality of the second condensation mouth one-to-one of condensation piece communicates, the fourth dispenser the second mouth of distribution with a plurality of the second mouth of pipe one-to-one of heat conduction pipe communicates.

7. The cryogenic storage device of any one of claims 1-4, wherein a thermally conductive fluid is disposed in the thermally conductive tube assembly, and a ratio of a volume of the thermally conductive fluid in a liquid state in the thermally conductive tube assembly to a volume of the thermally conductive tube assembly is not less than 30% when the refrigerator is in a refrigeration state.

8. The cryogenic storage device of any one of claims 1-4, wherein the refrigeration assembly comprises a thermal insulation member positioned outside the first thermal insulation chamber, the thermal insulation member having a second thermal insulation chamber therein, the coldhead being positioned within the second thermal insulation chamber.

9. The cryogenic storage device of any one of claims 1-4, wherein the refrigeration assembly and the pressure stabilizing assembly are both disposed on a same exterior sidewall of the housing.

10. The cryogenic storage device of any one of claims 1-4, wherein the refrigerator comprises a pulse tube thermo-acoustic refrigerator or a stirling refrigerator.