Program cooling instrument

Abstract

The utility model discloses a programmed cooling instrument which comprises a heat preservation cabinet body, a first refrigerator, an air supply device and a control unit, the heat preservation cabinet body comprises a containing cavity capable of keeping the internal temperature, and a perforated plate at the bottom allows air circulation and bears multiple sets of basket assemblies at the same time; the air supply device conveys a cooling medium generated by the first refrigerator into the whole containing cavity and is used for cooling the whole basket assembly. A cooling medium is communicated with the circulating air duct through the through hole array of the bottom perforated plate and the through hole array of the top perforated plate, so that airflow circulation is realized; the flow guide device guides the cooling medium to ensure that the cooling medium is uniformly distributed in the accommodating chamber and is accurately guided to the sample. According to the programmed cooling instrument, the cooling medium is conveyed upwards from the lower portion of the heat preservation cabinet body, the cooling medium is guided to the standard plate frames and the samples through the flow guiding device, the uniform cooling effect can be provided for the whole basket assembly, and the samples are prevented from moving among the different plate frames.

Description

Technical Field

[0001] The utility model relates to the technical field of isolators, in particular to a programmed temperature-lowering device. Background Art

[0002] The existing cooling equipment places the sample tubes in a relatively sparse customized plate rack for sample programmed cooling. During the operation, the samples need to be placed one by one in the customized plate rack, and then placed in the programmed cooling instrument for programmed cooling; when the sample cooling is completed, the samples need to be taken out one by one from the programmed cooling instrument and then transferred to a standard plate rack (square box plate rack, SBS plate rack or other standard plate rack), and then placed as a whole in a low-temperature storage device. The standard plate rack has a compact structure and the gap after the samples are placed is small, so the existing cooling equipment cannot effectively cool them.

[0003] The above process may cause the samples to be repeatedly frozen and thawed, thereby damaging the samples; when performing large-scale (thousands or tens of thousands) sample programmed cooling, the samples are manually transferred throughout the process, which is a huge workload, and sometimes several people may be required to transfer and freeze them at the same time; in addition, the existing equipment has the problem of not being able to connect with automated equipment, and cannot be placed directly into the programmed cooling instrument for programmed cooling by a robot. There is also the problem of not being able to use a robot to transfer the samples that have completed programmed cooling to a low-temperature storage device.

[0004] Therefore, it is urgent to propose a program cooling instrument that can cool the standard plate rack as a whole to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a programmed cooling device, which solves the problem that the programmed cooling device cannot provide a uniform and effective cooling effect.

[0006] In order to solve the above-mentioned purpose of the utility model, the utility model provides a program cooling device, including a heat preservation cabinet, a first refrigerator, an air supply device and a control unit;

[0007] The thermal insulation cabinet is provided with a accommodating chamber and a circulating air duct surrounding the accommodating chamber, the top of the accommodating chamber has an opening, a top porous plate is provided at the top opening of the accommodating chamber, and a bottom porous plate is provided at the bottom of the accommodating chamber, and the internal space of the accommodating chamber is connected to the circulating air duct through the through-hole array of the bottom porous plate and the through-hole array of the top porous plate;

[0008] The upper surface of the bottom porous plate is provided with a plurality of groups of basket seats for carrying the basket assembly. The first refrigerator and the air supply device are both arranged in the thermal insulation cabinet and located below the bottom porous plate. The air outlet of the air supply device faces the accommodating chamber. The cooling medium generated by the first refrigerator passes through the bottom porous plate under the action of the air supply device and is transported to the accommodating chamber, and then passes through the top porous plate and flows into the circulating air duct.

[0009] A flow guiding device is provided in the accommodating chamber, and the flow guiding device provides guidance for the flow of the cooling medium;

[0010] The first refrigerator and the air supply device are both connected to the control unit, and the control unit controls the working states of the first refrigerator and the air supply device according to the cooling requirement of the biological sample.

[0011] Optionally, the circulation air duct includes a first side wall air duct, a top air duct and a second side wall air duct connected in sequence; the top air duct is arranged at the top of the accommodating chamber, the first side wall air duct and the second side wall air duct are respectively arranged on opposite sides of the accommodating chamber, and the tops of the first side wall air duct and the second side wall air duct are both connected to the top air duct, and the bottoms of the first side wall air duct and the second side wall air duct are connected to the space below the bottom porous plate.

[0012] Optionally, the top porous plate includes a rectangular plate and a rectangular frame arranged on the rectangular plate, the through-hole array of the top porous plate is opened on the rectangular plate, and the rectangular plate is also provided with a first ventilation connection port and a second ventilation connection port, the first ventilation connection port and the second ventilation connection port are symmetrically arranged on opposite sides of the through-hole array, for respectively connecting the first side wall air duct and the second side wall air duct.

[0013] Optionally, it also includes an insulation cover, which is rotatably set on the insulation cabinet body, and the side of the insulation cover facing the accommodating chamber is the inner wall, the rectangular frame of the top porous plate is fixedly connected to the inner wall of the insulation cover, and the top air duct is formed between the rectangular plate of the top porous plate and the inner wall of the insulation cover.

[0014] Optionally, a side wall vent is opened on the side wall of the rectangular frame, and a pressure relief port is opened on the side wall of the thermal insulation cabinet. The pressure relief port and the side wall vent are positioned opposite to each other and are connected to each other for connecting the external environment and the top air duct.

[0015] Optionally, a third ventilation connection port and a fourth ventilation connection port are respectively provided on the top of the first side wall air duct and the second side wall air duct, and the third ventilation connection port and the fourth ventilation connection port correspond to the first ventilation connection port and the second ventilation connection port respectively.

[0016] Optionally, a first side wall ventilation plate and a second side wall ventilation plate are provided in the thermal insulation cabinet body, and the first side wall air duct is formed between the first side wall ventilation plate and the first side wall of the thermal insulation cabinet body, and the second side wall air duct is formed between the second side wall ventilation plate and the second side wall of the thermal insulation cabinet body. The first side wall ventilation plate and the second side wall ventilation plate are both L-shaped plates, and the third ventilation connection port or the fourth ventilation connection port is provided on the horizontal section of the L-shaped plate, and the end of the vertical section of the L-shaped plate that is not connected to the horizontal section is connected to the bottom porous plate.

[0017] Optionally, the guide device includes a plurality of side wall guide plates symmetrically arranged on the first side wall ventilation plate and the second side wall ventilation plate, the side wall guide plates include a side wall fixing plate and a first guide plate, the side wall guide plates are fixed to the first side wall ventilation plate or the second side wall ventilation plate through the side wall fixing plate, and a first angle is formed between the first guide plate and the first side wall ventilation plate or between the first guide plate and the second side wall ventilation plate.

[0018] Optionally, the guide device further includes intermediate guide plates sequentially arranged along the height direction, and the intermediate guide plates are located between two adjacent groups of the basket seats in the horizontal direction.

[0019] Optionally, the intermediate guide plate includes a second guide plate, an intermediate ventilation plate and a third guide plate connected in sequence; the second guide plate and the third guide plate form a second angle and a third angle with the intermediate ventilation plate respectively, and the intermediate ventilation plate is parallel to the bottom porous plate and is evenly provided with multiple ventilation holes.

[0020] Optionally, the control unit includes a first solenoid valve connected to the first refrigerator and an air supply control device connected to the air supply device.

[0021] Optionally, the thermal insulation cabinet further includes a second refrigerator, one end of which is fixed to the bottom porous plate, and the other end of which surrounds the basket seat and extends upward in a vertical direction.

[0022] Optionally, the control unit includes a second solenoid valve connected to the second refrigerator.

[0023] Optionally, the basket seat is used to carry a basket assembly with multiple layers of standard plate racks, and the standard plate racks include SBS plate racks or square box plates. The spacing between sample tubes arranged on the SBS plate racks and the square box plates is less than 2 mm.

[0024] Compared with the prior art, the conveying process of the cooling medium in the programmed cooling instrument provided by the present invention starts from the bottom of the accommodating chamber, and the air supply device conveys the cooling medium generated by the first refrigerator to the entire accommodating chamber, which is used to cool the entire basket assembly; the cooling medium is connected to the circulating air duct through the through-hole array of the bottom porous plate and the through-hole array of the top porous plate to realize air circulation; the guide device guides the cooling medium to ensure that the cooling medium is evenly distributed in the accommodating chamber and accurately guides the sample, thereby achieving uniform cooling of the sample in the basket assembly, improving the cooling efficiency, and ensuring the consistency of the cooling effect; the upper surface of the bottom porous plate is provided with multiple groups of basket seats for carrying the basket assembly to locate the position of the basket assembly, and the basket assembly directly performs sample program cooling, and can be docked with automated equipment. A manipulator or robot directly lifts the basket assembly into the programmed cooling instrument for program cooling. After completion, it can be directly lifted and transferred to a low-temperature storage device to avoid repeated transfer of the sample plate rack. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a cross-sectional view of a program cooling device in an embodiment of the present utility model;

[0026] Figure 2 This is a schematic diagram of the structure of the program cooling instrument in the embodiment of the utility model. Figure 1 ;

[0027] Figure 3 This is a schematic diagram of the structure of the program cooling instrument in the embodiment of the utility model. Figure 2 ;

[0028] Figure 4 This is a schematic diagram of the structure of the program cooling instrument in the embodiment of the utility model. Figure 3 ;

[0029] Figure 5 This is a schematic diagram of air flow in an embodiment of the present utility model;

[0030] Figure 6 This is a schematic diagram of the top air duct structure in an embodiment of the present utility model;

[0031] Figure 7 This is a schematic diagram of the top porous plate structure in an embodiment of the present utility model;

[0032] Figure 8 This is a schematic structural diagram of the second side wall ventilation plate in an embodiment of the present utility model;

[0033] Figure 9 This is a schematic diagram of the structure of the side wall guide plate in an embodiment of the present utility model;

[0034] Figure 10 This is a schematic structural diagram of the intermediate guide plate in an embodiment of the present utility model;

[0035] Figure 11 This is a schematic structural diagram of the first refrigerator in an embodiment of the present utility model;

[0036] Figure 12 This is a schematic structural diagram of the second refrigerator in an embodiment of the present utility model;

[0037] Figure 13 This is a schematic diagram of the structure of the program cooling instrument in the embodiment of the utility model. Figure 4 .

[0038] In the figure, 1, insulation cover; 2, insulation cabinet; 3, base; 4, back cover; 5, motor; 6, first side wall air duct; 7, second side wall air duct; 71, fourth ventilation connection port; 72, second side wall ventilation plate; 8, top air duct; 81, rectangular plate; 82, top air inlet; 83, second ventilation connection port; 9, middle guide plate; 91, second guide plate; 92, middle ventilation plate; 93, third guide plate; 10, side wall guide plate; 101, side wall solid plate Fixed plate; 102, first guide plate; 111, first synchronous wheel; 112, second synchronous wheel; 12, synchronous belt; 13, transmission shaft; 14, air supply device; 15, first refrigerator; 151, refrigeration hole; 16, second refrigerator; 17, first solenoid valve; 18, second solenoid valve; 19, fixed bracket; 20, bottom porous plate; 21, side wall vent; 22, basket seat; 23, basket assembly; 25, pressure relief port; 26, standard plate rack. DETAILED DESCRIPTION

[0039] The present invention will be described in more detail below with reference to the accompanying drawings, which illustrate preferred embodiments of the present invention. It should be understood that those skilled in the art may modify the present invention described herein while still achieving the beneficial effects of the present invention. Therefore, the following description should be understood as a general guide for those skilled in the art and not as a limitation of the present invention.

[0040] The following paragraphs describe the present invention in more detail by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the drawings are greatly simplified and not to exact scale, and are intended solely to facilitate and clearly illustrate the embodiments of the present invention.

[0041] This utility model embodiment provides a program cooling instrument, please refer to Figure 1 - Figure 4, including an insulation cabinet 2, a first refrigerator 15, an air supply device 14 and a control unit; the insulation cabinet 2 is provided with a accommodating chamber and a circulating air duct surrounding the accommodating chamber, the top of the accommodating chamber has an opening, a top porous plate is provided at the top opening of the accommodating chamber, and a bottom porous plate 20 is provided at the bottom of the accommodating chamber. The internal space of the accommodating chamber is connected to the circulating air duct through the through-hole array of the bottom porous plate 20 and the through-hole array of the top porous plate; the upper surface of the bottom porous plate 20 is provided with a plurality of groups of basket seats 22 for carrying basket assemblies 23, the first refrigerator 15 and the air supply device 14 are both arranged in the insulation cabinet 2 and are located below the bottom porous plate 20, the air outlet of the air supply device 14 faces the accommodating chamber, and the cooling medium generated by the first refrigerator 15 passes through the bottom porous plate 20 under the action of the air supply device 14 and is transported to the accommodating chamber, and then passes through the top porous plate and flows into the circulating air duct.

[0042] A flow guide device is provided in the accommodating chamber, which provides guidance for the flow of the cooling medium; the first refrigerator 15 and the air supply device 14 are both connected to the control unit, and the control unit controls the working status of the first refrigerator 15 and the air supply device 14 according to the cooling requirements of the biological sample.

[0043] In this embodiment, the thermal insulation cabinet 2 includes a accommodating chamber that can maintain the internal temperature and an opening that allows biological samples to enter and exit. The control unit is connected to the first refrigerator 15 and the air supply device 14, and provides power or power to control the first refrigerator 15 and the air supply device 14. The cooling medium is transported from bottom to top in the thermal insulation cabinet 2 through the first refrigerator 15 and the air supply device 14, and the cooling medium is guided to each layer of the basket assembly 23 through the guidance provided by the guide device, and is evenly arranged between each basket assembly 23, accurately guiding the biological samples placed on each layer; the bottom porous plate 20 and the top porous plate allow air to pass through the bottom porous plate 20 and the top porous plate 14. The air circulates, and the cooling medium flows into the circulating air duct through the bottom porous plate 20 and the through-hole array of the top porous plate to realize internal air circulation; the upper surface of the bottom porous plate 20 is provided with multiple groups of basket seats 22 for carrying the basket assembly 23, which locates the position of the basket assembly 23 and directly performs sample program cooling on the entire basket assembly 23. The manipulator or robot directly lifts the basket assembly 23 into the program cooling instrument for program cooling. After completion, it can be directly lifted and transferred to the low-temperature storage device to avoid repeated transfer of the sample to the plate rack; the program cooling instrument provided in this embodiment can provide a uniform cooling effect on the entire basket assembly 23.

[0044] Preferably, the material of the heat preservation cabinet 2 is low thermal conductivity polyurethane foam, which makes it possible to achieve a long-term low-temperature environment in the accommodating chamber.

[0045] Preferably, the air supply device 14 includes a fan.

[0046] Furthermore, it also includes a fixed bracket 19 , one end of which is fixedly arranged at the bottom of the thermal insulation cabinet 2 , and the other end is connected to the bottom porous plate 20 , and the fixed bracket 19 is used to support the bottom porous plate 20 .

[0047] Furthermore, the circulating air duct includes a first side wall duct 6, a top air duct 8 and a second side wall duct 7 connected in sequence; the top air duct 8 is arranged at the top of the accommodating chamber, and the first side wall duct 6 and the second side wall duct 7 are respectively arranged on opposite sides of the accommodating chamber, and the tops of the first side wall duct 6 and the second side wall duct 7 are both connected to the top air duct 8, and the bottoms are connected to the space between the bottom of the bottom porous plate 20 and the bottom of the insulation cabinet 2.

[0048] In this embodiment, the circulating air duct forms an internal air circulation system, and the first side wall air duct 6 and the second side wall air duct 7 are respectively located on opposite sides of the accommodating chamber, and the tops of the first side wall air duct 6 and the second side wall air duct 7 are respectively connected to the top air duct 8, and the bottoms of the first side wall air duct 6 and the second side wall air duct 7 are connected to the space between the bottom of the bottom porous plate 20 and the bottom of the insulation cabinet 2, thereby forming an air circulation system surrounding the accommodating chamber.

[0049] Please refer to Figure 5 , it should be noted that Figure 5 The arrows in the figure indicate the direction of air circulation. The circulating air duct provides a direction for the air circulation within the holding chamber. The air that has undergone heat exchange enters the top air duct 8 and is guided downward through the first side wall air duct 6 and the second side wall air duct 7. After entering the top air duct 8 from the upper part of the holding chamber, the air flows back to the lower part of the holding chamber through the first side wall air duct 6 and the second side wall air duct 7, forming a closed-loop air circulation, ensuring that the samples in the basket assembly 23 are evenly cooled. Recycling the cooling medium can reduce energy consumption and improve the energy efficiency of the equipment. In addition, the circulating air duct helps to improve the heat exchange efficiency because the air continuously flows in the air duct, which can continuously remove the heat in the basket assembly 23. The circulating air duct also provides the possibility of achieving precise control of the direction and speed of the airflow.

[0050] For details, please refer to Figure 6 - Figure 7The top porous plate includes a rectangular plate 81 and a rectangular frame arranged on the rectangular plate 81. The through-hole array of the top porous plate is opened on the rectangular plate 81. The rectangular plate 81 is also provided with a first ventilation connection port and a second ventilation connection port 83. The first ventilation connection port and the second ventilation connection port 83 are symmetrically arranged on opposite sides of the rectangular plate 81 for connecting the first side wall air duct 6 and the second side wall air duct 7 respectively.

[0051] In this embodiment, the through-hole array of the top porous plate is the top air inlet 82 , and the top air inlet 82 faces the air outlet of the air supply device 14 .

[0052] It should be noted that the first ventilation connection port and the second ventilation connection port 83 are symmetrically arranged. Figure 6 Only the second ventilation connection port 83 is numbered, and the first ventilation connection port is not marked.

[0053] Furthermore, it also includes an insulation cover 1, which matches the top opening of the accommodating chamber. The insulation cover 1 is rotatably set on the insulation cabinet body 2, and the side of the insulation cover 1 facing the accommodating chamber is the inner wall. The rectangular frame of the top porous plate is fixedly connected to the inner wall of the insulation cover 1, and the top air duct 8 is formed between the rectangular plate 81 of the top porous plate and the inner wall of the insulation cover 1.

[0054] It should be noted that Figure 7 Only the top air inlet 82 opened on the rectangular plate 81 is shown, and the first ventilation connection port and the second ventilation connection port 83 symmetrically arranged on opposite sides of the rectangular plate 81 are not shown.

[0055] Furthermore, a side wall vent 21 is opened on the side wall of the rectangular frame, and a pressure relief port 25 is opened on the side wall of the thermal insulation cabinet 2. The pressure relief port 25 is opposite to the side wall vent 21 and is connected to each other for connecting the external environment and the top air duct 8.

[0056] In this embodiment, please continue to refer to Figure 5 The side wall of the insulation cabinet 2 is provided with a pressure relief port 25, and the side wall vent 21 is provided with a pressure relief port 25. Figure 5 Not shown in the figure, the pressure relief port 25 and the side wall vent 21 are connected to the external environment and the top air duct 8 to balance the internal and external pressures and prevent pressure differences caused by temperature changes or airflow. It can also be used to safely release steam or other gases that may accumulate inside.

[0057] Furthermore, a third ventilation connection port and a fourth ventilation connection port 71 are respectively provided at the top of the first side wall air duct 6 and the second side wall air duct 7 , and the third ventilation connection port and the fourth ventilation connection port 71 correspond to the first ventilation connection port and the second ventilation connection port 83 , respectively.

[0058] Furthermore, a first side wall ventilation plate and a second side wall ventilation plate 72 are provided in the thermal insulation cabinet body 2, and the first side wall ventilation plate and the second side wall ventilation plate 72 respectively form the first side wall air duct 6 and the second side wall air duct 7 with the inner wall of the thermal insulation cabinet body 2.

[0059] Specifically, the first side wall air duct 6 is formed between the first side wall ventilation plate and the first side wall of the thermal insulation cabinet 2 , and the second side wall air duct 7 is formed between the second side wall ventilation plate 72 and the second side wall of the thermal insulation cabinet 2 .

[0060] Please refer to Figure 8 The first side wall ventilation plate and the second side wall ventilation plate 72 are both L-shaped plates, and the third ventilation connection port or the fourth ventilation connection port 71 is provided on the horizontal section of the L-shaped plate, and the end of the vertical section of the L-shaped plate that is not connected to the horizontal section is connected to the bottom porous plate 20.

[0061] It should be noted that the first side wall ventilation plate and the second side wall ventilation plate 72 have the same structure. Figure 8 Take the second side wall ventilation plate 72 and the fourth ventilation connection port 71 opened on the second side wall ventilation plate 72 as an example.

[0062] In this embodiment, the first side wall ventilation plate and the second side wall ventilation plate 72 modularize the air duct system to facilitate maintenance and replacement.

[0063] For further information, please refer to Figure 9 The guide device includes a plurality of side wall guide plates 10 symmetrically arranged on the first side wall ventilation plate and the second side wall ventilation plate 72. The plurality of side wall guide plates 10 are arranged in sequence along the height direction. The side wall guide plates 10 include a side wall fixing plate 101 and a first guide plate 102. The side wall guide plates 10 are fixed on the first side wall ventilation plate or the second side wall ventilation plate 72 through the side wall fixing plate 101. A first angle is formed between the first guide plate 102 and the first side wall ventilation plate or between the first guide plate 102 and the second side wall ventilation plate 72.

[0064] For further information, please refer to Figure 10 The guide device further includes intermediate guide plates 9 sequentially arranged along the height direction, and the intermediate guide plates 9 are located between two adjacent groups of the basket seats 22 in the horizontal direction.

[0065] Furthermore, the intermediate guide plate 9 includes a second guide plate 91, an intermediate ventilation plate 92 and a third guide plate 93 connected in sequence; the second guide plate 91 and the third guide plate 93 respectively form a second angle and a third angle with the intermediate ventilation plate 92, and the intermediate ventilation plate 92 is parallel to the bottom porous plate 20 and is evenly provided with a plurality of ventilation holes. Preferably, the ventilation opening is a waist-shaped hole; connecting plates are provided at both ends of the intermediate guide plate 9, and the intermediate guide plate 9 is fixed to the side walls on the front and rear sides of the insulation cabinet 2 through the connecting plates.

[0066] Please continue to refer to Figure 5 In this embodiment, the sidewall guide plates 10 and the intermediate guide plates 9 guide the airflow containing the cooling medium along the sidewalls or between the basket assemblies 23 to form airflow channels. This ensures that the cooling medium is evenly distributed across each shelf layer of the basket assemblies 23, thereby optimizing the air flow path. This allows the cool air to more evenly cover all areas within the storage chamber. The modular design of the sidewall guide plates 10 and the intermediate guide plates 9 facilitates maintenance and replacement.

[0067] Furthermore, the ventilation holes provided on the middle ventilation plate 92 allow airflow to pass through, and the design of the first angle, the second angle and the third angle can be optimized according to the airflow dynamics principle and the height of each layer of samples to achieve the best airflow distribution and heat exchange effect.

[0068] Preferably, the second angle and the third angle are obtuse angles.

[0069] Furthermore, the control unit includes a first solenoid valve 17 connected to the first refrigerator 15 and an air supply transmission device connected to the air supply device 14 .

[0070] Please continue to refer to Figure 3 The air supply transmission device includes a motor 5, a first synchronous wheel 111, a second synchronous wheel 112, a synchronous belt 12 and a transmission shaft 13; the output end of the motor 5 is connected to the first synchronous wheel 111, and the first synchronous wheel 111 and the second synchronous wheel 112 are transmitted through the synchronous belt 12. One end of the transmission shaft 13 is connected to the second synchronous wheel 112, and the other end of the transmission shaft 13 is connected to the air supply device 14, thereby driving the air supply device 14 to rotate.

[0071] For further information, please refer to Figure 2 The thermal insulation cabinet 2 further includes a second refrigerator 16, one end of which is fixed to the bottom porous plate 20, and the other end of the second refrigerator 16 surrounds the basket seat 22 and extends upward in a vertical direction.

[0072] Furthermore, the control unit includes a second solenoid valve 18 connected to the second refrigerator 16 .

[0073] In this embodiment, preferably, please refer to Figure 11 - Figure 12 The first refrigerator 15 and the second refrigerator 16 include refrigerant pipes, liquid nitrogen flows inside the refrigerant pipes, and a plurality of refrigeration holes 151 are arranged on the inner wall of the refrigerant pipes. Liquid nitrogen is sprayed out from the refrigeration holes 151. Under the action of the wind force of the air supply device 14, the liquid nitrogen is blown from the bottom to the top to cool the containing chamber and the sample.

[0074] The first refrigerator 15 and the second refrigerator 16 are respectively controlled by separate solenoid valves to regulate the amount of cooling medium in different zones.

[0075] Preferably, the refrigerant pipe of the first refrigerator 15 surrounds the air supply device 14, and the refrigerant pipe of the second refrigerator 16 surrounds the plate rack carrying the samples and extends upward.

[0076] Furthermore, the basket seat 22 is used to carry the basket assembly 23 arranged with multiple layers of standard plate racks 26. The standard plate racks 26 include SBS plate racks or square box plates. The spacing between sample tubes arranged on the SBS plate racks and the square box plates is less than 2 mm.

[0077] The programmed cooling device provided in this embodiment is capable of carrying multiple basket assemblies 23 arranged in multiple layers of standard plate racks 26. The standard plate racks 26 are tightly arranged, and the spacing between sample tubes is less than 2 mm. Conventional programmed cooling devices have a poor cooling effect on the standard plate racks 26, and the internal cooling material circulation effect is poor, which cannot provide a uniform cooling effect. The programmed cooling device provided in this embodiment provides the possibility of cooling the standard plate racks 26 as a whole. Cooling the standard plate racks 26 as a whole allows samples to be transferred between plate racks. After the samples are loaded into the standard plate racks 26, the entire rack is moved into the programmed cooling device. After the cooling is completed, the entire rack is directly transferred to the cryogenic freezing equipment. The standard plate racks 26 are suitable for both programmed cooling devices and cryogenic freezing equipment, avoiding the movement of samples between different plate racks.

[0078] For further information, please refer to Figure 13 The insulation cabinet body 2 also includes an insulation cover hinge, and the two ends of the insulation cover hinge respectively fix the insulation cover 1 and the insulation cabinet body 2 to achieve the opening and closing of the insulation cover 1.

[0079] Please continue to refer to Figure 13 The program cooling device also includes a base 3 and a back cover 4, which are respectively connected to the insulation cabinet 2; the motor 5 is fixed in the back cover 4, and the base 3 is arranged under the insulation cabinet 2 to provide a bearing space for the first synchronous wheel 111, the second synchronous wheel 112, the synchronous belt 12 and the drive shaft 13; the first solenoid valve 17 and the second solenoid valve 18 are respectively connected to the first refrigerator 15 and the second refrigerator 16 through the back cover 4 and the insulation cabinet 2.

[0080] To sum up, the programmed cooling instrument provided by the utility model transports the cooling medium from the lower part to the upper part of the accommodating chamber through the first refrigerator and the air supply device, and guides the cooling medium to the standard plate rack and the sample through the guide device to achieve a uniform cooling effect. The circulating air duct arranged around the accommodating chamber provides a channel and direction for the air circulation; at the same time, a basket assembly for carrying and arranging multiple layers of standard plate racks is provided. The programmed cooling instrument provided by the utility model can perform programmed cooling on the standard plate rack as a whole. After the cooling is completed, the standard plate rack is moved to avoid the movement of samples between different plate racks.

[0081] Obviously, those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. A programmed cooling device, characterized in that: It includes a heat preservation cabinet, a first refrigerator, an air supply device and a control unit; The thermal insulation cabinet is provided with a accommodating chamber and a circulating air duct surrounding the accommodating chamber, the top of the accommodating chamber has an opening, a top porous plate is provided at the top opening of the accommodating chamber, and a bottom porous plate is provided at the bottom of the accommodating chamber, and the internal space of the accommodating chamber is connected to the circulating air duct through the through-hole array of the bottom porous plate and the through-hole array of the top porous plate; The upper surface of the bottom porous plate is provided with a plurality of groups of basket seats for carrying the basket assembly. The first refrigerator and the air supply device are both arranged in the thermal insulation cabinet and located below the bottom porous plate. The air outlet of the air supply device faces the accommodating chamber. The cooling medium generated by the first refrigerator passes through the bottom porous plate under the action of the air supply device and is transported to the accommodating chamber, and then passes through the top porous plate and flows into the circulating air duct. A flow guiding device is provided in the accommodating chamber, and the flow guiding device provides guidance for the flow of the cooling medium; The first refrigerator and the air supply device are both connected to the control unit, and the control unit controls the working states of the first refrigerator and the air supply device according to the cooling requirement of the biological sample.

2. The programmed cooling device according to claim 1, wherein: The circulation air duct includes a first side wall air duct, a top air duct and a second side wall air duct connected in sequence; the top air duct is arranged at the top of the accommodating chamber, the first side wall air duct and the second side wall air duct are respectively arranged on opposite sides of the accommodating chamber, and the tops of the first side wall air duct and the second side wall air duct are both connected to the top air duct, and the bottoms of the first side wall air duct and the second side wall air duct are connected to the space below the bottom porous plate.

3. The programmed cooling device according to claim 2, wherein: The top porous plate includes a rectangular plate and a rectangular frame arranged on the rectangular plate. The through-hole array of the top porous plate is opened on the rectangular plate. The rectangular plate is also provided with a first ventilation connection port and a second ventilation connection port. The first ventilation connection port and the second ventilation connection port are symmetrically arranged on opposite sides of the through-hole array, and are used to connect the first side wall air duct and the second side wall air duct respectively.

4. The programmed cooling device according to claim 3, wherein: It also includes an insulation cover, which is rotatably set on the insulation cabinet body. The side of the insulation cover facing the accommodating chamber is the inner wall. The rectangular frame of the top porous plate is fixedly connected to the inner wall of the insulation cover. The top air duct is formed between the rectangular plate of the top porous plate and the inner wall of the insulation cover.

5. The programmed cooling device according to claim 3, wherein: A side wall vent is provided on the side wall of the rectangular frame, and a pressure relief port is provided on the side wall of the thermal insulation cabinet. The pressure relief port and the side wall vent are opposite to each other and are connected to each other for connecting the external environment and the top air duct.

6. The programmed cooling device according to claim 3, wherein: A third ventilation connection port and a fourth ventilation connection port are respectively formed on the top of the first side wall air duct and the second side wall air duct, and the third ventilation connection port and the fourth ventilation connection port correspond to the first ventilation connection port and the second ventilation connection port respectively.

7. The programmed cooling device according to claim 6, wherein: A first side wall ventilation plate and a second side wall ventilation plate are provided in the thermal insulation cabinet body, the first side wall air duct is formed between the first side wall ventilation plate and the first side wall of the thermal insulation cabinet body, and the second side wall air duct is formed between the second side wall ventilation plate and the second side wall of the thermal insulation cabinet body, the first side wall ventilation plate and the second side wall ventilation plate are both L-shaped plates, the third ventilation connection port or the fourth ventilation connection port is provided on the horizontal section of the L-shaped plate, and the end of the vertical section of the L-shaped plate that is not connected to the horizontal section is connected to the bottom porous plate.

8. The programmed cooling device according to claim 7, wherein: The guide device includes a plurality of side wall guide plates symmetrically arranged on the first side wall ventilation plate and the second side wall ventilation plate, the side wall guide plates include a side wall fixing plate and a first guide plate, the side wall guide plates are fixed on the first side wall ventilation plate or the second side wall ventilation plate through the side wall fixing plate, and a first angle is formed between the first guide plate and the first side wall ventilation plate or between the first guide plate and the second side wall ventilation plate.

9. The programmed cooling device according to claim 8, wherein: The guide device further comprises intermediate guide plates sequentially arranged along the height direction, and the intermediate guide plates are located between two adjacent groups of the basket seats in the horizontal direction.

10. The programmed cooling device according to claim 9, wherein: The intermediate guide plate includes a second guide plate, an intermediate ventilation plate and a third guide plate connected in sequence; the second guide plate and the third guide plate form a second angle and a third angle with the intermediate ventilation plate respectively, and the intermediate ventilation plate is parallel to the bottom porous plate and is evenly provided with multiple ventilation holes.

11. The programmed cooling device according to claim 1, wherein: The control unit includes a first solenoid valve connected to the first refrigerator and an air supply control device connected to the air supply device.

12. The programmed cooling device according to claim 1, wherein: The heat preservation cabinet further includes a second refrigerator, one end of which is fixed to the bottom porous plate, and the other end of which surrounds the basket seat and extends upward in a vertical direction.

13. The programmed cooling device according to claim 12, wherein: The control unit includes a second solenoid valve connected to the second refrigerator.

14. The programmed cooling device according to claim 1, wherein: The basket seat is used to carry a basket assembly for arranging multi-layer standard plate racks, wherein the standard plate racks include SBS plate racks or square box plates, and the spacing between sample tubes arranged on the SBS plate racks and the square box plates is less than 2 mm.

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