A multi-zoned liquid nitrogen refrigerator apparatus

Abstract

The utility model relates to refrigerator technical field especially relates to a kind of multi-partition liquid nitrogen refrigerator equipment, comprising: bracket is provided with refrigerant supply module;Cold energy power module includes power assembly, first heat exchange pipe and first conveying pipe, power assembly is connected in refrigerant supply module, first heat exchange pipe is connected with first conveying pipe corresponding and constitutes energy supply circuit, several first cold energy conveying carriers are arranged in energy supply circuit, and first cold energy conveying carrier is driven connection in power assembly;The storage temperature of first storage is-20~‑150 ℃, and first storage is set corresponding with first conveying pipe;The storage temperature of second storage is 5~‑20 ℃, and refrigerant conveying pipe is arranged in second storage, heat pipe is arranged in cold energy power module, heat pipe is communicated with refrigerant conveying pipe to form cooling circuit, refrigerant flow liquid is arranged in cooling circuit.The utility model can improve the adaptability to different storage samples without setting compressor.

Description

Technical Field

[0001] This utility model relates to the field of refrigerator technology, and in particular to a multi-zone liquid nitrogen refrigerator device. Background Technology

[0002] In the process of biological sample processing and production, samples, production reagents, culture media, and other materials are preserved. Each material requires a different preservation temperature, with common storage temperatures being -4℃, -20℃, -80℃, -150℃, and -196℃. Typically, -4℃ freezers, -20℃ freezers, -80℃ freezers, and liquid nitrogen tanks are purchased for sample preservation.

[0003] The existing solution involves using multiple refrigerators and liquid nitrogen tanks at different temperatures to store samples and materials. However, this method has drawbacks: the sheer number of devices requires a large amount of space; the devices generate significant heat, necessitating dedicated air conditioning in the rooms to maintain the ambient temperature. Furthermore, operating multiple devices increases management costs and maintenance complexity. If any device malfunctions, it may affect the preservation quality of related samples and materials, posing a significant risk to the biological sample processing and production process. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the related art. To this end, this invention provides a multi-zone liquid nitrogen refrigerator device, which solves the technical problem of large number of devices and difficult management in the prior art, improves the adaptability of the refrigerator device to the preservation temperature of various biological samples, and realizes the preservation of samples by centralized liquid nitrogen cooling.

[0005] This utility model provides a multi-zone liquid nitrogen refrigerator device, including: A support frame is provided with a refrigerant supply module, which stores liquid nitrogen. A cold energy power module includes a power assembly, several sets of first heat exchange tubes, and several sets of first delivery tubes. The power assembly is connected to the refrigerant supply module. The first heat exchange tubes and the first delivery tubes are connected one-to-one to form an energy supply circuit. Several first cold energy delivery carriers are provided in the energy supply circuit. The first cold energy delivery carriers are driven to be connected to the power assembly. The first heat exchange tubes are located in the refrigerant supply module. The first storage container, of which there are multiple first storage containers, has a storage temperature of -20℃ to -150℃. The first storage container is installed on the bracket and is correspondingly arranged with the first conveying pipe. The first conveying pipe is used to exchange heat with the first storage container. The second storage unit, which is provided in multiple ways, is installed on the bracket. The storage temperature of the second storage unit is 25℃~-20℃. A refrigerant delivery pipe is provided inside the second storage unit. A heat transfer pipe is provided inside the cold energy power module. The heat transfer pipe is connected to the refrigerant delivery pipe to form a cooling circuit. A refrigerant flowing liquid is provided in the cooling circuit. A central control module is mounted on the bracket and connected to the refrigerant supply module, the cold energy power module, the first storage unit, and the second storage unit.

[0006] A further improvement of the multi-zone liquid nitrogen refrigerator device of this utility model is that the power assembly includes a power housing, a power motor and a first grooved wheel, the power motor is disposed in the power housing, the power motor is driven and connected to the first grooved wheel, and the first grooved wheel is driven and connected to a plurality of first cold energy conveying carriers. The interior of the power housing is provided with a plurality of conveying gear grooves. The first heat exchange tube and the first conveying tube are connected through the conveying gear grooves, and the first groove wheel corresponds to the conveying gear groove. The first grooved wheel is driven to rotate by the power motor, thereby driving several of the first cold energy conveying carriers to move within the energy supply circuit.

[0007] A further improvement of this utility model of a multi-zone liquid nitrogen refrigerator is that the cold energy power module further includes a heat exchange shell, the heat exchange shell is connected to the power assembly and sleeved on a plurality of the first delivery pipes, and the first storage unit is connected to the heat exchange shell.

[0008] A further improvement of this utility model of a multi-zone liquid nitrogen refrigerator is that the cold energy power module is provided in three groups, namely a middle cold energy power module, a left cold energy power module and a right cold energy power module. The heat exchange shell of the middle cold energy power module extends vertically, while the heat exchange shell of the left or right cold energy power module extends horizontally. The intermediate cold energy power module is equipped with a fourth temperature sensor, which is connected to the central control module.

[0009] A further improvement of this utility model regarding a multi-zone liquid nitrogen refrigerator is that the first storage container includes a first outer shell, a first insulation layer, a refrigerant interlayer, and a first inner cavity. The first insulation layer is disposed inside the first outer shell, the first inner cavity is disposed inside the first outer shell, the refrigerant interlayer is disposed on the outer wall of the first inner cavity, the first insulation layer is disposed between the refrigerant interlayer and the first outer shell, the first outer shell is provided with an openable and closable first door for covering the first inner cavity, and the refrigerant interlayer is used for heat exchange with the heat exchange outer shell.

[0010] A further improvement of this utility model of a multi-zone liquid nitrogen refrigerator is that a heat exchange bracket is provided at the position of the first outer shell corresponding to the heat exchange outer shell, the heat exchange bracket is provided with a heat exchange plate, and the heat exchange plate is used to fit against the heat exchange outer shell. The refrigerant interlayer is provided with several sets of second heat exchange tubes. The two ends of the second heat exchange tubes pass through the first insulation layer and the first outer shell and are located in the heat exchange bracket. The heat exchange bracket is provided with several heat exchange gear slots. The heat exchange gear slots and the second heat exchange tubes are arranged in a one-to-one correspondence. The heat exchange gear slots and the second heat exchange tubes are connected to form a heat exchange circuit. A second cold energy transport carrier is provided in the heat exchange circuit. A heat exchange motor is installed inside the heat exchange bracket. The heat exchange motor drives a second grooved wheel, which is correspondingly arranged with the heat exchange circuit. The second grooved wheel is used to drive the second cold energy transport carrier to move within the heat exchange circuit.

[0011] A further improvement of this utility model regarding a multi-zone liquid nitrogen refrigerator device is that the bracket is provided with a horizontally extending slide rail corresponding to the bottom surface of each of the first storage units. A slide plate is slidably mounted on the slide rail, and the first storage unit is mounted on the slide plate. The bracket is provided with a drive motor, which is connected to the slide plate. The drive motor controls the slide plate to move along the slide rail, thereby moving the first storage unit so that the first storage unit is in contact with or away from the cold energy power module.

[0012] A further improvement of this utility model regarding a multi-zone liquid nitrogen refrigerator device is that the second storage container includes: The second outer shell is mounted on the bracket. The second outer shell has a second inner cavity. A second insulation layer is provided between the second outer shell and the second inner cavity. The refrigerant delivery pipe surrounds the outer wall of the second inner cavity. Both ends of the refrigerant delivery pipe extend out of the second insulation layer and the second outer shell. The second outer shell is provided with a second door for covering the second inner cavity. The two ends of the refrigerant delivery pipe and the two ends of the heat transfer pipe are connected by an insulation pipe. The insulation pipe is equipped with a power pump, a pressure sensor, a first temperature sensor and a valve. The refrigerant delivery pipe, the heat transfer pipe and the insulation pipe together constitute the cooling circuit.

[0013] A further improvement of this utility model of a multi-zone liquid nitrogen refrigerator is that the central control module includes a second temperature sensor disposed in the first storage container, a third temperature sensor disposed in the second storage container, and a controller. The controller is connected to the second temperature sensor, the third temperature sensor, the refrigerant supply module, and the cold energy power module.

[0014] A further improvement of this utility model of a multi-zone liquid nitrogen refrigerator is that the refrigerant supply module includes a power liquid nitrogen tank and a liquid nitrogen replenishment tank, the cold energy power module is connected to the power liquid nitrogen tank, the liquid nitrogen replenishment tank is connected to the power liquid nitrogen tank, and the liquid nitrogen replenishment tank is connected to the liquid nitrogen delivery pipeline.

[0015] This invention uses a central control module to monitor the temperature and level of the refrigerant supply module in real time, facilitating the replenishment of liquid nitrogen and ensuring sufficient liquid nitrogen for the refrigerator. The central control module also controls the operation of the cooling power module in real time, allowing for easy adjustment of the operating temperature of the first storage unit. Furthermore, the central control module regulates the flow rate and volume of the refrigerant liquid in the cooling circuit to control the temperature of the second storage unit. This allows for flexible adjustment of the operating temperatures of both the first and second storage units based on the specific biological samples, improving the refrigerator's adaptability to different biological sample preservation temperatures.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of a multi-zone liquid nitrogen refrigerator device provided by this utility model.

[0019] Figure 2 This is a schematic diagram of the power liquid nitrogen tank and cold energy power module in a multi-zone liquid nitrogen refrigerator device provided by this utility model. Figure 1 .

[0020] Figure 3 This is a schematic diagram of the power liquid nitrogen tank and cold energy power module in a multi-zone liquid nitrogen refrigerator device provided by this utility model. Figure 2 .

[0021] Figure 4 This is a cross-sectional schematic diagram of the power liquid nitrogen tank and the cold energy power module in a multi-zone liquid nitrogen refrigerator device provided by this utility model.

[0022] Figure 5 This is a schematic diagram of the intermediate cold energy power module in a multi-zone liquid nitrogen refrigerator device provided by this utility model.

[0023] Figure 6 This is a cross-sectional view of the powertrain of the intermediate cold energy power module.

[0024] Figure 7 This is a schematic diagram of the left or right cold energy power module in a multi-zone liquid nitrogen refrigerator device provided by this utility model.

[0025] Figure 8 This is a cross-sectional view of the powertrain of either the left or right cold energy power module.

[0026] Figure 9 This is a schematic diagram of the first storage unit in a multi-zone liquid nitrogen refrigerator device provided by this utility model.

[0027] Figure 10 yes Figure 9 A cross-sectional view of the middle JJ.

[0028] Figure 11 yes Figure 9 Cross-sectional view of KK.

[0029] Figure 12 yes Figure 9 Cross-sectional view of HH.

[0030] Figure 13 This is a schematic diagram showing the connection between the second storage unit and the cold energy power module in a multi-zone liquid nitrogen refrigerator device provided by this utility model.

[0031] Figure 14 This is an exploded view of the first storage unit and the cold energy power module in a multi-zone liquid nitrogen refrigerator device provided by this utility model.

[0032] Figure label: 1. Bracket; 11. Casters; 21. Power liquid nitrogen tank; 22. Liquid nitrogen replenishment tank; 23. Liquid nitrogen storage tank; 3. First storage container; 4. Second storage container; 5. Central control module; 6. Chassis; 211. Tank cover; 212. Liquid replenishment port; 701. Middle cold energy power module; 702. Left cold energy power module; 703. Right cold energy power module; 71. First heat exchange pipe; 72. First conveying pipe; 73. First cold energy conveying carrier; 74. Power housing; 75. Heat exchange housing; 76. First grooved wheel; 741. Insertion part; 742. Conveying gear groove; 78. Power motor; 781. First motor shaft; 782. Drive wheel; 783. Driven wheel; 784. Driven shaft; 79. Cold energy interface; 31. First outer shell; 32. First insulation layer; 33. Refrigerant interlayer; 34. First inner cavity; 35. Heat exchange bracket; 36. Heat exchange plate; 37. Heat exchange motor; 331. Second heat exchange tube; 341. Second temperature sensor; 351. Heat exchange gear groove; 342. First door; 371. Auxiliary insulation layer; 372. Second grooved wheel; 373. Second cold energy transport carrier; 41. Refrigerant delivery pipe; 42. Second insulation layer; 43. Third temperature sensor; 44. Valve; 45. Power pump; 46. Pressure sensor; 47. First temperature sensor; 81. Slide rail; 82. Slide plate. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. The following embodiments are used to illustrate this utility model but should not be used to limit its scope.

[0034] The following is combined Figure 1 This invention describes a multi-zone liquid nitrogen refrigerator device, comprising: Support 1, the support 1 is equipped with a refrigerant supply module, the refrigerant supply module stores liquid nitrogen; A cold energy power module includes a power assembly, several sets of first heat exchange tubes 71 and several sets of first delivery tubes 72. The power assembly is connected to the refrigerant supply module. The first heat exchange tubes 71 and the first delivery tubes 72 are connected one-to-one to form an energy supply circuit. Several first cold energy delivery carriers 73 are provided in the energy supply circuit. The first cold energy delivery carriers 73 are driven to be connected to the power assembly. The first heat exchange tubes 71 are located in the refrigerant supply module. The first storage container 3, of which multiple first storage containers 3 are provided, has a storage temperature of -20℃ to -150℃. The first storage container 3 is installed on the bracket 1 and is correspondingly arranged with the first conveying pipe 72. The first conveying pipe 72 is used to exchange heat with the first storage container 3. The second storage 4, multiple second storage 4 are provided, the second storage 4 is installed on the bracket 1, the storage temperature of the second storage 4 is 25℃~-20℃, the second storage 4 is provided with a refrigerant delivery pipe 41, the cold energy power module is provided with a heat transfer pipe, the heat transfer pipe is connected to the refrigerant delivery pipe 41 to form a cooling circuit, and the cooling circuit is provided with refrigerant flowing liquid. The central control module 5 is disposed on the bracket 1 and connected to the refrigerant supply module, the cold energy power module, the first storage device 3 and the second storage device 4.

[0035] The central control module 5 monitors the temperature and level of the refrigerant supply module in real time, facilitating the replenishment of liquid nitrogen and ensuring sufficient liquid nitrogen for the refrigerator. The central control module 5 also controls the operation of the cold energy power module in real time, allowing for easy adjustment of the operating temperature of the first storage unit 3. Furthermore, the central control module 5 regulates the flow rate and volume of the refrigerant liquid in the cooling circuit to control the temperature of the second storage unit 4. This allows for flexible adjustment of the operating temperatures of the first and second storage units 3 and 4 based on different biological samples, improving the refrigerator's adaptability to biological sample preservation temperatures. This invention does not use a compressor, effectively reducing the impact of external heating on ambient temperature. The cold energy transmission carrier in this invention is a solid energy carrier, which can be stopped or reversed at any time to achieve more flexible and stable temperature control.

[0036] Preferably, the number of cooling power modules can be configured according to the number and size of the first and second storage units. In practical applications, the power and layout of the cooling power modules can be flexibly adjusted based on the different specifications of the first and second storage units to ensure that each storage area receives a suitable cooling supply. Simultaneously, the cooling power modules should also possess good stability and reliability to ensure the long-term stable operation of the refrigerator equipment and provide a reliable preservation environment for biological samples.

[0037] It should be noted that the storage temperature of the first storage device 3 can be selected as -20℃, -30℃, -40℃, -50℃, -60℃, -70℃, -80℃, -90℃, -100℃, -110℃, -120℃, -130℃, -140℃, or -150℃.

[0038] It should be noted that the storage temperature of the second storage device 4 can be selected from 25℃, 20℃, 15℃, 10℃, 5℃, 0℃, -5℃, -10℃, -15℃, and -20℃.

[0039] Preferably, the refrigerant fluid can be selected from any one of cyclohexane, isobutane, propane, or an aqueous solution of ethylene glycol.

[0040] In a preferred embodiment of this utility model of a multi-zone liquid nitrogen refrigerator, such as... Figure 2 , Figure 3 and Figure 4 As shown, the powertrain includes a power housing 74, a power motor 78, and a first grooved wheel 76. The power motor 78 is disposed on the power housing 74 and is driven to the first grooved wheel 76. The first grooved wheel 76 is driven to a plurality of first cold energy conveying carriers 73. The power housing 74 has a plurality of conveying gear grooves 742 inside, the first heat exchange tube 71 and the first conveying tube 72 are connected through the conveying gear grooves 742, and the first groove wheel 76 corresponds to the conveying gear groove 742. The first grooved wheel 76 is driven to rotate by the power motor 78, thereby driving several of the first cold energy conveying carriers 73 to move within the energy supply circuit.

[0041] Preferably, the first cold energy transport carrier 73 can be selected as a sphere, cylinder, spindle, etc.

[0042] Specifically, such as Figure 5 and Figure 7 As shown, the cold energy power module also includes a heat exchange shell 75, which is connected to the power assembly and sleeved on a plurality of the first delivery pipes 72, and the first storage device 3 is connected to the heat exchange shell 75.

[0043] Preferably, the first storage device 3 can be attached to the heat exchange housing 75, or the first storage device 3 can be directly connected to the heat exchange housing 75.

[0044] In a specific implementation case, such as Figure 2 , Figure 5 and Figure 7 As shown, the cold energy power module is provided in three groups, namely the middle cold energy power module 701, the left cold energy power module 702 and the right cold energy power module 703; the heat exchange shell 75 of the middle cold energy power module 701 extends vertically, and the heat exchange shell 75 of the left cold energy power module 702 or the right cold energy power module 703 extends horizontally. The middle cold energy power module 701 is provided with a fourth temperature sensor, which is connected to the central control module.

[0045] Preferably, the fourth temperature sensor is connected to the powertrain and detects the temperature of the heat exchange shell, thereby regulating the operating speed of the power motor in the powertrain, which in turn regulates the operating speed of the first cold energy transport carrier, and thus regulates the temperature of the heat exchange shell.

[0046] In a specific implementation case, such as Figure 1 As shown, a first storage unit 3 is located between the middle cold energy power module 701 and the left cold energy power module 702, and another is located between the middle cold energy power module 701 and the right cold energy power module 703.

[0047] In a specific implementation case, such as Figure 6 As shown, the power housing 74 of the intermediate cold energy power module 701 is also provided with a first motor shaft 781 and a driven shaft 784 arranged in parallel. A drive wheel 782 is connected to the first motor shaft 781, and a driven wheel 783 is connected to the driven shaft 784. The drive wheel 782 and the driven wheel 783 are connected by a conveyor belt. A power motor 78 drives and connects to the first motor shaft 781. There are two first grooved wheels 76, one set on the first motor shaft 781 and the other set on the driven wheel 783. The power motor 78 drives the first motor shaft 781 to rotate. The rotation of the first motor shaft 781 drives the drive wheel 782 to rotate, which in turn drives the driven wheel 783 to rotate, which in turn drives the driven shaft 784 to rotate. The rotation of the first motor shaft 781 and the driven shaft 784 drives the first grooved wheel 76 to rotate, thereby causing the first grooved wheel 76 to drive the first cold energy conveying carrier 73 to move, which improves the moving speed of the first cold energy conveying carrier 73 and thus improves the cold energy transfer efficiency.

[0048] Preferably, the first cold energy transport carrier 73 is made of stainless steel. When the first cold energy transport carrier 73 enters the first heat exchange tube 71, it exchanges heat with the liquid nitrogen in the power liquid nitrogen tank 21, thereby cooling down the first cold energy transport carrier 73. When the first cold energy transport carrier 73 enters the first transport tube 72, it exchanges heat with the first storage tank 3, thereby increasing the temperature of the first cold energy transport carrier 73 and decreasing the temperature in the first storage tank 3.

[0049] Specifically, the bottom of the power housing 74 forms a plug-in portion 741, and the top of the power liquid nitrogen tank 21 has a tank cover plate 211. The tank cover plate 211 has a plug-in groove, and the plug-in portion 741 is inserted into the plug-in groove to realize the installation of the power assembly on the power liquid nitrogen tank 21.

[0050] In a specific implementation case, such as Figure 8As shown, the power housing 74 of the left cold energy power module 702 or the right cold energy power module 703 is also provided with a first motor shaft 781 and a driven shaft 784 in parallel. A drive wheel 782 is connected to the first motor shaft 781, and a driven wheel 783 is connected to the driven shaft 784. The drive wheel 782 and the driven wheel 783 are connected by a conveyor belt. A power motor 78 drives and connects to the first motor shaft 781. There are two first grooved wheels 76, which are disposed on the first motor shaft 781. The power motor 78 drives the first motor shaft 781 to rotate. The rotation of the first motor shaft 781 drives the drive wheel 782 to rotate, which in turn drives the driven wheel 783 to rotate, which in turn drives the driven shaft 784 to rotate. The rotation of the first motor shaft 781 and the driven shaft 784 drives the first grooved wheels 76 to rotate, thereby causing the first grooved wheels 76 to drive the first cold energy conveying carrier 73 to move, which improves the moving speed of the first cold energy conveying carrier 73 and thus improves the cold energy transfer efficiency.

[0051] Preferably, when the pipeline of the power supply circuit is relatively long, the number of first grooved wheels connected to the power motor can be increased, thereby increasing the moving speed of the first cold energy carrier.

[0052] Preferably, the driving wheel and the driven wheel can also be connected by a belt, gear, or other transmission method.

[0053] Furthermore, such as Figure 9 , Figure 10 , Figure 11 and Figure 12 As shown, the first storage container 3 includes a first outer shell 31, a first insulation layer 32, a refrigerant interlayer 33, and a first inner cavity 34. The first insulation layer 32 is disposed inside the first outer shell 31, the first inner cavity 34 is disposed inside the first outer shell 31, the refrigerant interlayer 33 is disposed on the outer wall of the first inner cavity 34, the first insulation layer 32 is disposed between the refrigerant interlayer 33 and the first outer shell 31, the first outer shell 31 is provided with an openable and closable first door 342, the first door 342 is used to cover the first inner cavity 34, and the refrigerant interlayer 33 is used to exchange heat with the heat exchange outer shell 75.

[0054] Specifically, the first outer shell 31 is provided with a heat exchange bracket 35 at the position corresponding to the heat exchange outer shell 75, and the heat exchange bracket 35 is provided with a heat exchange plate 36, which is used to fit against the heat exchange outer shell 75 for heat exchange. A plurality of second heat exchange tubes 331 are provided at the refrigerant interlayer 33. The two ends of the second heat exchange tubes 331 pass through the first insulation layer 32 and the first outer shell 31 and are located inside the heat exchange bracket 35. A plurality of heat exchange gear grooves 351 are provided inside the heat exchange bracket 35. The heat exchange gear grooves 351 and the second heat exchange tubes 331 are arranged in a one-to-one correspondence. The heat exchange gear grooves 351 and the second heat exchange tubes 331 are connected to form a heat exchange circuit. A second cold energy transport carrier 373 is provided inside the heat exchange circuit. A heat exchange motor 37 is provided inside the heat exchange bracket 35. The heat exchange motor 37 drives a second grooved wheel 372. The second grooved wheel 372 is correspondingly arranged with the heat exchange circuit. The second grooved wheel 372 is used to drive the second cold energy transport carrier 373 to move within the heat exchange circuit.

[0055] Preferably, the heat exchange bracket 35 is provided with a second motor shaft, a heat exchange motor 37 is driven and connected to the second motor shaft, and a second grooved wheel 372 is connected to the second motor shaft. The heat exchange motor 37 drives the second motor shaft to rotate, thereby driving the second grooved wheel 372 to rotate, so as to drive the second cold energy transport carrier 373 to move in the heat exchange circuit. When the second cold energy transport carrier 373 corresponds to the heat exchange shell 75 at the heat exchange circuit, the second cold energy transport carrier 373 and the heat exchange shell 75 exchange heat.

[0056] Preferably, an auxiliary insulation layer 371 is provided inside the heat exchange bracket 35 at the position corresponding to the second heat exchange tube 331.

[0057] Furthermore, such as Figure 14 As shown, the bracket 1 is provided with a horizontally extending slide rail 81 corresponding to the bottom surface of each first storage unit 3. A slide plate 82 slides on the slide rail 81, and the first storage unit 3 is installed on the slide plate 82. The bracket 1 is provided with a drive motor, which is connected to the slide plate 82. The drive motor controls the slide plate 82 to slide along the slide rail 81, thereby moving the first storage unit 3. This facilitates the contact or separation of the heat exchange plate 36 of the first storage unit 3 from the heat exchange shell 75 of the cold energy power module, and facilitates the adjustment of the distance between the heat exchange plate 36 and the heat exchange shell 75, thus facilitating the adjustment of the temperature of the first storage unit 3.

[0058] Preferably, the slide rail 81 is provided with a limit rod at the end corresponding to the intermediate refrigerant power module. The limit rod clamps the first storage 3, which improves the positional stability of the first storage 3 and ensures the heat exchange efficiency between the heat exchange shell 75 and the heat exchange plate 36.

[0059] Preferably, two sets of heat transfer pipes are provided, which are located in the heat exchange shell 75 of the left cold energy power module 702 and the heat exchange shell 75 of the right cold energy power module 703, respectively. Two sets of second storage tanks 4 are provided, and the second storage tanks 4 and heat transfer pipes are arranged in a one-to-one correspondence. Cold energy interfaces 79 are provided at both ends of the heat exchange shell 75 corresponding to the heat transfer pipes.

[0060] Furthermore, such as Figure 1 and Figure 13 As shown, the second storage 4 includes: The second outer shell is mounted on the bracket 1. The second outer shell has a second inner cavity. A second insulation layer 42 is provided between the second outer shell and the second inner cavity. The refrigerant delivery pipe 41 surrounds the outer wall of the second inner cavity. Both ends of the refrigerant delivery pipe 41 extend out of the second insulation layer 42 and the second outer shell. The second outer shell is provided with a second door, which is used to cover the second inner cavity. The two ends of the refrigerant delivery pipe 41 and the two ends of the heat transfer pipe are connected by an insulation pipe. The insulation pipe is equipped with a power pump 45, a pressure sensor 46, a first temperature sensor 47, and a valve 44. The refrigerant delivery pipe 41, the heat transfer pipe, and the insulation pipe together constitute the cooling circuit.

[0061] Preferably, the refrigerant in the cooling circuit is driven by the power pump 45 to facilitate heat exchange between the second inner cavity and the left or right cold energy power module 702 or the right cold energy power module 703.

[0062] Furthermore, the central control module 5 includes a second temperature sensor 341 disposed in the first storage 3, a third temperature sensor 43 disposed in the second storage 4, and a controller. The controller is connected to the second temperature sensor 341, the third temperature sensor 43, the refrigerant supply module, and the cold energy power module.

[0063] Preferably, the middle refrigerant power module is equipped with a fourth temperature sensor, the left refrigerant power module is equipped with a fifth temperature sensor, and the right refrigerant power module is equipped with a sixth temperature sensor. The controller is connected to the fourth, fifth, and sixth temperature sensors and is also connected to the power motor 78 and the power pump 45.

[0064] Preferably, a housing 6 is installed on the top of the bracket 1. The housing 6 is connected to the controller. The housing 6 can be equipped with a display screen, which allows operators to easily understand the real-time status of the first storage unit 3, the second storage unit 4, the refrigerant power module, and the refrigerant supply module.

[0065] Preferably, the chassis is equipped with an alarm module. When abnormal temperature changes, abnormal power motor, abnormal power pump, or abnormal pressure detected by the pressure sensor are detected, the chassis will issue an alarm to facilitate troubleshooting.

[0066] Preferably, the bottom of the bracket 1 is provided with casters 11 to facilitate the adjustment of the position of the refrigerator.

[0067] Furthermore, the refrigerant supply module includes a power liquid nitrogen tank 21 and a liquid nitrogen replenishment tank 22. The cold energy power module is connected to the power liquid nitrogen tank 21, and the liquid nitrogen replenishment tank 22 is connected to the power liquid nitrogen tank 21. The liquid nitrogen replenishment tank 22 is connected to an external liquid nitrogen delivery pipeline, which facilitates the replenishment of liquid nitrogen to the liquid nitrogen replenishment tank 22.

[0068] Preferably, a liquid nitrogen storage tank 23 is provided on the side of the support corresponding to the refrigerant supply module. The liquid nitrogen storage tank 23 can be used to store biological samples at temperatures below -150°C. The liquid nitrogen storage tank 23 is connected to an external liquid nitrogen delivery pipeline.

[0069] Preferably, the power liquid nitrogen tank 21 is provided with two replenishment ports 212, which are used to connect with the liquid nitrogen replenishment tank 22 and the external liquid nitrogen delivery pipeline.

[0070] In one specific implementation, the cold energy power module is provided in three sets: a middle cold energy power module 701, a left cold energy power module 702, and a right cold energy power module 703. There are two first storage units: one first storage unit 702 is located between the middle cold energy power module 701 and the left cold energy power module 702, and the other is located between the middle cold energy power module 701 and the right cold energy power module 703. The storage temperature of one first storage unit is -80℃, and the storage temperature of the other first storage unit is -100℃. There are two second storage units: one second storage unit is located at -4℃, and the storage temperature of the other second storage unit is -20℃. Biological samples with temperatures below -100℃ can be directly stored in liquid nitrogen storage tanks. The temperature data fed back by the second and third temperature sensors is observed on the display screen of the chassis. The central control module then adjusts the speed of the motors of the middle cold energy power module 701, the left cold energy power module 702 and the right cold energy power module 703. The central control module also adjusts the working frequency and pressure of the power pump to keep the two first storage tanks 3 and the two second storage tanks 4 at the set temperature, with a temperature error allowed of 2°C, so as to preserve the biological samples.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A multi-zoned liquid nitrogen freezer apparatus, characterized by, include: A support frame is provided with a refrigerant supply module, which stores liquid nitrogen. A cold energy power module includes a power assembly, several sets of first heat exchange tubes, and several sets of first delivery tubes. The power assembly is connected to the refrigerant supply module. The first heat exchange tubes and the first delivery tubes are connected one-to-one to form an energy supply circuit. Several first cold energy delivery carriers are provided in the energy supply circuit. The first cold energy delivery carriers are driven to be connected to the power assembly. The first heat exchange tubes are located in the refrigerant supply module. The first storage container, of which there are multiple first storage containers, has a storage temperature of -20℃ to -150℃. The first storage container is installed on the bracket and is correspondingly arranged with the first conveying pipe. The first conveying pipe is used to exchange heat with the first storage container. The second storage unit, which is provided in multiple ways, is installed on the bracket. The storage temperature of the second storage unit is 25℃~-20℃. A refrigerant delivery pipe is provided inside the second storage unit. A heat transfer pipe is provided inside the cold energy power module. The heat transfer pipe is connected to the refrigerant delivery pipe to form a cooling circuit. A refrigerant flowing liquid is provided in the cooling circuit. A central control module is mounted on the bracket and connected to the refrigerant supply module, the cold energy power module, the first storage unit, and the second storage unit.

2. A multi-zoned liquid nitrogen freezer apparatus as claimed in claim 1, wherein, The powertrain includes a power housing, a power motor, and a first grooved wheel. The power motor is disposed in the power housing and is driven to the first grooved wheel. The first grooved wheel is driven to a plurality of first cold energy conveying carriers. The interior of the power housing is provided with a plurality of conveying gear grooves. The first heat exchange tube and the first conveying tube are connected through the conveying gear grooves, and the first groove wheel corresponds to the conveying gear groove. The first grooved wheel is driven to rotate by the power motor, thereby driving several of the first cold energy conveying carriers to move within the energy supply circuit.

3. The multi-zone liquid nitrogen refrigerator device according to claim 2, characterized in that, The cold energy power module also includes a heat exchange shell, which is connected to the power assembly and sleeved on a plurality of the first delivery pipes, and the first storage unit is connected to the heat exchange shell.

4. A multi-zone liquid nitrogen refrigerator device according to claim 3, characterized in that, The cold energy power module is configured in three groups: a middle cold energy power module, a left cold energy power module, and a right cold energy power module. The heat exchange shell of the middle cold energy power module extends vertically, while the heat exchange shell of the left or right cold energy power module extends horizontally. The intermediate cooling power module is equipped with a fourth temperature sensor, which is connected to the central control module.

5. A multi-zone liquid nitrogen refrigerator device according to claim 3, characterized in that, The first storage container includes a first outer shell, a first insulation layer, a refrigerant interlayer, and a first inner cavity. The first insulation layer is disposed inside the first outer shell, the first inner cavity is disposed inside the first outer shell, the refrigerant interlayer is disposed on the outer wall of the first inner cavity, the first insulation layer is disposed between the refrigerant interlayer and the first outer shell, the first outer shell is provided with an openable and closable first door for covering the first inner cavity, and the refrigerant interlayer is used to exchange heat with the heat exchange outer shell.

6. A multi-zone liquid nitrogen refrigerator device according to claim 5, characterized in that, The first outer shell is provided with a heat exchange bracket at a position corresponding to the heat exchange outer shell, and the heat exchange bracket is provided with a heat exchange plate, which is used to fit against the heat exchange outer shell; The refrigerant interlayer is provided with several sets of second heat exchange tubes. The two ends of the second heat exchange tubes pass through the first insulation layer and the first outer shell and are located in the heat exchange bracket. The heat exchange bracket is provided with several heat exchange gear slots. The heat exchange gear slots and the second heat exchange tubes are arranged in a one-to-one correspondence. The heat exchange gear slots and the second heat exchange tubes are connected to form a heat exchange circuit. A second cold energy transport carrier is provided in the heat exchange circuit. A heat exchange motor is installed inside the heat exchange bracket. The heat exchange motor drives a second grooved wheel, which is correspondingly arranged with the heat exchange circuit. The second grooved wheel is used to drive the second cold energy transport carrier to move within the heat exchange circuit.

7. A multi-zone liquid nitrogen refrigerator device according to claim 1, characterized in that, The bracket is provided with a horizontally extending slide rail corresponding to the bottom surface of each of the first storage units. A slide plate is slidably mounted on the slide rail. The first storage unit is mounted on the slide plate. The bracket is provided with a drive motor. The drive motor is connected to the slide plate and controls the slide plate to move along the slide rail, thereby moving the first storage unit so that the first storage unit is in contact with or away from the cold energy power module.

8. A multi-zone liquid nitrogen refrigerator device according to claim 1, characterized in that, The second storage includes: The second outer shell is mounted on the bracket. The second outer shell has a second inner cavity. A second insulation layer is provided between the second outer shell and the second inner cavity. The refrigerant delivery pipe surrounds the outer wall of the second inner cavity. Both ends of the refrigerant delivery pipe extend out of the second insulation layer and the second outer shell. The second outer shell is provided with a second door for covering the second inner cavity. The two ends of the refrigerant delivery pipe and the two ends of the heat transfer pipe are connected by an insulation pipe. The insulation pipe is equipped with a power pump, a pressure sensor, a first temperature sensor and a valve. The refrigerant delivery pipe, the heat transfer pipe and the insulation pipe together constitute the cooling circuit.

9. A multi-zone liquid nitrogen refrigerator device according to claim 1, characterized in that, The central control module includes a second temperature sensor disposed in the first storage, a third temperature sensor disposed in the second storage, and a controller. The controller is connected to the second temperature sensor, the third temperature sensor, the refrigerant supply module, and the cold energy power module.

10. A multi-zone liquid nitrogen refrigerator device according to claim 1, characterized in that, The refrigerant supply module includes a power liquid nitrogen tank and a liquid nitrogen replenishment tank. The cold energy power module is connected to the power liquid nitrogen tank, the liquid nitrogen replenishment tank is connected to the power liquid nitrogen tank, and the liquid nitrogen replenishment tank is connected to the liquid nitrogen delivery pipeline.

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