CN220152996U - Sample storehouse refrigerating plant - Google Patents

Abstract

The utility model provides a sample warehouse refrigerating device, which comprises: the circulating air channel can be communicated with the sample freezing area; the refrigeration assembly comprises a compressor, a condenser, a heat exchanger and a first evaporator which are communicated, and the first evaporator is arranged in the sample freezing area; the defrosting piece comprises a cold trap arranged on the outer side of the sample freezing region, the cold trap comprises a cylinder body and a communicating pipe wound on the outer side wall of the cylinder body, the cylinder body is communicated with the circulating air channel, and the outlet of the heat exchanger is respectively communicated with the communicating pipe and the first evaporator. By the technical scheme provided by the utility model, the problem that the content of the sample library in the related technology is easy to generate frosting phenomenon, so that the normal use of the sample library is affected can be solved.

Description

Sample storehouse refrigerating plant

Technical Field

The utility model relates to the technical field of sample warehouse refrigerating devices, in particular to a sample warehouse refrigerating device.

Background

The sample library is used for collecting and storing samples such as biological macromolecules, cells, tissues and organs, and storing biological samples in the sample library, and in order to ensure the activity of the biological samples, a sample library refrigerating device is further arranged in the sample library, so that the biological samples can be stored.

In the related art, a sample warehouse refrigerating device is arranged in a sample warehouse, a compressor in the sample warehouse refrigerating device is used for providing power, and a refrigerant is discharged into a heat exchange piece to realize heat exchange, so that evaporation and heat absorption are carried out in an evaporator, and the effect of refrigerating and cooling the sample warehouse is realized.

However, when the sample warehouse in the related art is used for a long time, the sample warehouse is cooled by the sample warehouse refrigerating device, so that frosting phenomenon is easy to occur in the sample warehouse, and the normal use of the sample warehouse is further affected.

Disclosure of Invention

The utility model provides a sample warehouse refrigerating device, which aims to solve the problem that the content of a sample warehouse in the related technology is easy to generate frosting phenomenon, so that the normal use of the sample warehouse is affected.

The utility model provides a sample warehouse refrigerating device, which comprises: the circulating air channel can be communicated with the sample freezing area; the refrigeration assembly comprises a compressor, a condenser, a heat exchanger and a first evaporator which are communicated, and the first evaporator is arranged in the sample freezing area; the defrosting piece comprises a cold trap arranged on the outer side of the sample freezing region, the cold trap comprises a cylinder body and a communicating pipe wound on the outer side wall of the cylinder body, the cylinder body is communicated with the circulating air channel, and the outlet of the heat exchanger is respectively communicated with the communicating pipe and the first evaporator.

Further, a heating element is arranged in the cylinder.

Further, the heating element comprises an electric heating wire arranged on the inner side wall of the cylinder.

Further, a frost inhibiting coating is arranged on the top of the sample freezing and storing frame of the sample freezing and storing area.

Further, the first end of cold trap is linked together with circulating air duct through first intercommunication pipeline, and the second end of cold trap is linked together with circulating air duct through the second intercommunication pipeline, all is provided with the stop valve on first intercommunication pipeline and the second communicating pipe way, is provided with the leakage fluid dram that is used for discharging condensation liquid on the cold trap.

Further, the refrigeration assembly further comprises a second evaporator, the second evaporator is arranged on the outer side of the sample freezing area, and an outlet of the heat exchanger is communicated with the second evaporator.

Further, the heat exchanger comprises a first sub heat exchanger, a second sub heat exchanger and a third sub heat exchanger, an outlet of the compressor is communicated with an inlet of the condenser, an outlet of the condenser is communicated with an inlet of the first sub heat exchanger, an outlet of the first sub heat exchanger is communicated with an inlet of the second sub heat exchanger, an outlet of the second sub heat exchanger is communicated with an inlet of the third sub heat exchanger, an outlet of the third sub heat exchanger is respectively communicated with a first evaporator, a communicating pipe and an inlet of the second evaporator, and an outlet of the first evaporator, the communicating pipe and an outlet of the second evaporator are communicated with an inlet of the compressor.

Further, the first sub heat exchanger, the second sub heat exchanger and the third sub heat exchanger are respectively provided with a loop inlet and a loop outlet correspondingly, the outlets of the first evaporator, the second evaporator and the communicating pipe are respectively communicated with the loop inlet of the third sub heat exchanger, the loop outlet of the third sub heat exchanger is communicated with the loop inlet of the second sub heat exchanger, the loop outlet of the second sub heat exchanger is communicated with the loop inlet of the first sub heat exchanger, and the loop outlet of the first sub heat exchanger is communicated with the inlet of the compressor.

Further, a first supercooling loop is arranged between the first sub heat exchanger and the second sub heat exchanger, the first supercooling loop comprises a gas-liquid separator, a first filter and a first expansion valve which are sequentially communicated, an outlet of the first sub heat exchanger is communicated with an inlet of the gas-liquid separator, the gas-liquid separator comprises a liquid phase outlet and a gas phase outlet, the liquid phase outlet is communicated with an inlet of the first filter, an outlet of the first filter is communicated with an inlet of the first expansion valve, the gas phase outlet is communicated with an inlet of the second sub heat exchanger, and an outlet of the first expansion valve is communicated with a loop inlet of the second sub heat exchanger.

Further, a second supercooling loop is arranged between the second sub heat exchanger and the third sub heat exchanger, the second supercooling loop comprises a second filter and a second expansion valve which are communicated in sequence, an outlet of the second sub heat exchanger is communicated with an inlet of the second filter, an outlet of the second filter is communicated with an inlet of the second expansion valve, and an outlet of the second expansion valve is communicated with a loop inlet of the third sub heat exchanger.

By applying the technical scheme of the utility model, the sample warehouse refrigerating device comprises a circulating air duct, a refrigerating assembly and a defrosting piece, wherein the circulating air duct is communicated with the sample freezing frame, the sample warehouse is cooled by utilizing the refrigerating assembly, so that the biological sample is subjected to low-temperature storage, various high-temperature and high-pressure gaseous refrigerants sequentially pass through a condenser, a heat exchanger and a first evaporator by utilizing a compressor, condensation and heat release are carried out by utilizing the condenser, heat exchange is realized in the heat exchanger, the gaseous refrigerants are changed into liquid refrigerants, the liquid refrigerants are introduced into the first evaporator, the sample freezing frame is cooled, and the activity of the biological sample is further ensured. When the sample warehouse is cooled, water is contained in the air, the problem of frosting is easy to occur due to temperature reduction, the cold trap outside the sample freezing frame is utilized, the cylinder body in the cold trap is communicated with the circulating air duct, the communicating pipe is arranged on the outer side wall of the cylinder body in a winding mode, the communicating pipe is communicated with the outlet of the heat exchanger, and when the air in the sample warehouse is circulated, the cylinder body is required to be cooled by utilizing liquid refrigerant flowing in the communicating pipe, and the liquid refrigerant is lower in temperature, so that the cylinder body can be cooled by utilizing the liquid refrigerant when the air is introduced into the cylinder body through the circulating air duct, and then the air flowing into the cylinder body can be cooled and dried, so that the water in the air frosts on the inner wall of the cylinder body, the air flowing out of the cylinder body is dried, frosting in the sample warehouse can be avoided, and the sample warehouse can be ensured to store biological samples normally.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

fig. 1 shows a schematic diagram of a sample library refrigeration apparatus according to an embodiment of the present utility model.

Wherein the above figures include the following reference numerals:

10. a refrigeration assembly; 11. a compressor; 12. a condenser; 13. a heat exchanger; 131. a first sub heat exchanger; 132. a second sub heat exchanger; 133. a third sub heat exchanger; 14. a first evaporator; 15. an oil separator; 151. an oil return pipe;

20. a defrosting member; 21. a cold trap; 22. a second evaporator;

30. a first subcooling circuit; 31. a gas-liquid separator; 311. a gas phase outlet; 312. a liquid phase outlet; 32. a first filter; 33. a first expansion valve; 34. a first electromagnetic valve;

40. a second subcooling circuit; 41. a second filter; 42. a second expansion valve; 43. and a second electromagnetic valve.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1, an embodiment of the present utility model provides a sample library refrigeration apparatus, which includes a circulation duct, a refrigeration assembly 10 and a defrosting member 20, the circulation duct can be communicated with a sample freezing region, the refrigeration assembly 10 includes a compressor 11, a condenser 12, a heat exchanger 13 and a first evaporator 14 which are communicated, the first evaporator 14 is disposed in the sample freezing region, the defrosting member 20 includes a cold trap 21 disposed outside the sample freezing region, the cold trap 21 includes a cylinder and a communication pipe wound on an outer side wall of the cylinder, the cylinder is communicated with the circulation duct, and an outlet of the heat exchanger 13 is respectively communicated with the communication pipe and the first evaporator 14.

The sample storehouse refrigerating device that this embodiment provided is applied, this sample storehouse refrigerating device includes circulation wind channel, refrigeration subassembly 10 and defrosting piece 20, set up circulation wind channel and sample cryopreservation area and be linked together, through utilizing refrigeration subassembly 10 to cool down the sample storehouse, and then play the effect of low temperature storage to biological sample, utilize compressor 11 to pass through condenser 12 with multiple high temperature high pressure's gaseous refrigerant in proper order, heat exchanger 13 and first evaporimeter 14, utilize condenser 12 to carry out condensation exothermic heat, realize heat transfer and then become liquid refrigerant from gaseous refrigerant in heat exchanger 13, utilize liquid refrigerant to let in first evaporimeter 14 can cool down the sample cryopreservation area, and then guarantee biological sample's activity. When the sample warehouse is cooled, water is contained in the air, the problem of frosting is easy to occur due to temperature reduction, therefore, the cold trap 21 outside the sample freezing region is utilized, the cylinder in the cold trap 21 is communicated with the circulating air duct, the communicating pipe is wound on the outer side wall of the cylinder, the communicating pipe is communicated with the outlet of the heat exchanger 13, when the air in the sample warehouse is circulated, the cylinder is required to be cooled by utilizing liquid refrigerant flowing in the communicating pipe, and the liquid refrigerant is lower in temperature, so that the air can be cooled by utilizing the liquid refrigerant when the air is introduced into the cylinder through the circulating air duct, and then the air flowing into the cylinder is cooled and dried, so that the water in the air frosts on the inner wall of the cylinder, the air flowing out of the cylinder is dried, and frosting in the sample warehouse can be avoided, and the sample warehouse can be ensured to store biological samples normally.

In this embodiment, a heating element is disposed in the cylinder. By adopting the structure, the heating element is arranged in the cylinder, so that the cylinder can be heated by the heating element when the refrigeration assembly 10 does not work, frost on the inner side wall of the cylinder can be melted, and periodic treatment is facilitated.

In this embodiment, the heating element includes an electric heating wire disposed on an inner sidewall of the cylinder. By adopting the structure, the heating wire is arranged for control, so that the heating is convenient, and the frost on the inner side wall of the cylinder body is convenient to treat.

The water collecting tank is arranged in the cylinder body, so that the frost can be heated and melted into water, and then the frost can be conveniently treated.

In this embodiment, the top of the sample cryopreservation frame of the sample cryopreservation area is provided with a frost inhibiting coating. By adopting the structure, the frost inhibition coating is arranged at the top of the sample freezing storage rack in the sample freezing storage area, so that the problem of frost formation on the outer wall when the sample freezing storage rack is used for a long time can be avoided, the sample freezing storage rack can be ensured to be used for a long time, and the sample freezing storage rack is convenient to take out.

It should be noted that, by defrosting the air by using the cold trap 21 and simultaneously performing the frost-inhibiting function by using the frost-inhibiting coating, the stable operation of the sample warehouse refrigerating device is ensured.

Wherein, be provided with the air drying's selection interface in the sample storehouse for the selection interface is connected with drying system, and then can carry out the secondary drying to the outside of sample cryopreservation frame, avoids taking place frosting problem.

Specifically, utilize insulation material to set up in sample storehouse refrigerating plant, and then can play the heat preservation effect, can avoid can not heat up fast under the circumstances of outage, can effectively prevent to cause the damage to biological sample under the special circumstances.

In this embodiment, a first end of the cold trap 21 is connected to the circulation duct through a first communication pipeline, a second end of the cold trap 21 is connected to the circulation duct through a second communication pipeline, and the first communication pipeline and the second communication pipeline are both provided with a stop valve, and a liquid outlet for discharging condensed liquid is provided on the cold trap 21. By adopting the structure, the first end of the cold trap 21 is communicated with the circulating air channel through the first communication pipeline, the second end of the cold trap 21 is communicated with the circulating air channel through the second communication pipeline, and the stop valves are arranged on the first communication pipeline and the second communication pipeline, so that the cylinder can be used as a positive pressure air source or a negative pressure cylinder under the action of the stop valves, the circulation of air in the circulating air channel is conveniently realized, the structural reliability and the practicability of the sample warehouse refrigerating device are improved, and in order to facilitate the treatment of frosting in the cold trap 21, a liquid outlet for discharging condensed liquid is arranged on the cold trap 21, and the treatment of frosting is facilitated.

As shown in fig. 1, the refrigeration assembly 10 further includes a second evaporator 22, the second evaporator 22 is disposed outside the sample freezing region, and the outlet of the heat exchanger 13 is in communication with the second evaporator 22. By adopting the structure, the second evaporator 22 is arranged on the outer side of the sample freezing frame, the outlet of the heat exchanger 13 is communicated with the second evaporator 22, and then the outer side of the sample freezing frame can be cooled and dried under the action of the second evaporator 22, so that the defrosting effect of the sample warehouse is further improved.

As shown in fig. 1, the heat exchanger 13 includes a first sub heat exchanger 131, a second sub heat exchanger 132, and a third sub heat exchanger 133, an outlet of the compressor 11 is communicated with an inlet of the condenser 12, an outlet of the condenser 12 is communicated with an inlet of the first sub heat exchanger 131, an outlet of the first sub heat exchanger 131 is communicated with an inlet of the second sub heat exchanger 132, an outlet of the second sub heat exchanger 132 is communicated with an inlet of the third sub heat exchanger 133, an outlet of the third sub heat exchanger 133 is respectively communicated with inlets of the first evaporator 14, the communicating pipe, and the second evaporator 22, and an outlet of the first evaporator 14, the communicating pipe, and the second evaporator 22 are communicated with an inlet of the compressor 11. By adopting the structure, through setting up first sub heat exchanger 131, second sub heat exchanger 132 and third sub heat exchanger 133, carry out partial condensation to the gaseous refrigerant of multiple high temperature high pressure at condenser 12, communicate the export of condenser 12 with the import of first sub heat exchanger 131 for condense under the effect of first sub heat exchanger 131, and lead in second sub heat exchanger 132 and third sub heat exchanger 133 in proper order, gaseous refrigerant heat change becomes liquid refrigerant when third sub heat exchanger 133, later lead in first evaporimeter 14, communicating pipe and second evaporimeter 22, and then can cool down the outside of sample cryopreservation frame, cold trap 21 and sample cryopreservation frame, and then guarantee that the sample storehouse can play the effect of storage to biological sample.

As shown in fig. 1, the first sub-heat exchanger 131, the second sub-heat exchanger 132 and the third sub-heat exchanger 133 are respectively provided with a loop inlet and a loop outlet, the outlets of the first evaporator 14, the second evaporator 22 and the communicating pipe are respectively communicated with the loop inlet of the third sub-heat exchanger 133, the loop outlet of the third sub-heat exchanger 133 is communicated with the loop inlet of the second sub-heat exchanger 132, the loop outlet of the second sub-heat exchanger 132 is communicated with the loop inlet of the first sub-heat exchanger 131, and the loop outlet of the first sub-heat exchanger 131 is communicated with the inlet of the compressor 11. By adopting the structure, the outlets of the first evaporator 14, the second evaporator 22 and the communicating pipe are communicated with the loop inlet of the third sub-heat exchanger 133, circulation is carried out through the third sub-heat exchanger 133, the second sub-heat exchanger 132 and the first sub-heat exchanger 131 in sequence, and finally the air enters the compressor 11 through the inlet of the compressor 11, so that the circulating working process of the refrigeration assembly 10 is realized, the cooling and dehumidification of the sample warehouse can be ensured, the circulating refrigeration can be realized, and the reliability and the practicability of the sample warehouse refrigeration device are improved.

As shown in fig. 1, a first supercooling circuit 30 is disposed between a first sub heat exchanger 131 and a second sub heat exchanger 132, the first supercooling circuit 30 includes a gas-liquid separator 31, a first filter 32 and a first expansion valve 33 which are sequentially communicated, an outlet of the first sub heat exchanger 131 is communicated with an inlet of the gas-liquid separator 31, the gas-liquid separator 31 includes a liquid phase outlet 312 and a gas phase outlet 311, the liquid phase outlet 312 is communicated with an inlet of the first filter 32, an outlet of the first filter 32 is communicated with an inlet of the first expansion valve 33, the gas phase outlet 311 is communicated with an inlet of the second sub heat exchanger 132, and an outlet of the first expansion valve 33 is communicated with a circuit inlet of the second sub heat exchanger 132. With the above structure, by providing the first supercooling circuit 30, the gas-liquid separator 31 can separate the liquid phase and the gas phase of the refrigerant after heat exchange in the first sub-heat exchanger 131, the impurities can be filtered by the first filter 32, the first expansion valve 33 can reduce the pressure of the liquid refrigerant, and then the liquid refrigerant is introduced into the loop inlet of the second sub-heat exchanger 132 from the outlet of the first expansion valve 33, so that the reduced pressure refrigerant exchanges heat with the high-pressure gaseous refrigerant, and then the gaseous refrigerant in the second sub-heat exchanger 132 is changed into the liquid state, thereby playing the role of heat exchange.

In this embodiment, the multiple refrigerants include a low-temperature refrigerant and an ultralow-temperature refrigerant, the low-temperature refrigerant and the ultralow-temperature refrigerant which are high in temperature and high in pressure and are introduced into the first sub-heat exchanger 131 are changed into a liquid state under the action of the first sub-heat exchanger 131, the ultralow-temperature refrigerant is still in a gaseous state, the liquid-state low-temperature refrigerant and the gaseous ultralow-temperature refrigerant can be separated under the action of the gas-liquid separator 31, and then the liquid-state low-temperature refrigerant can be depressurized under the action of the first expansion valve 33, and then enters the second sub-heat exchanger 132 to exchange heat with the gaseous ultralow-temperature refrigerant, so that the ultralow-temperature refrigerant is changed into a liquid state, and the low-temperature refrigerant is communicated with the loop inlet of the first sub-heat exchanger 131 through the loop outlet of the second sub-heat exchanger 132, thereby playing a role of cooling and heat exchange.

The refrigerant further comprises a medium-temperature refrigerant, and the Chinese refrigerant can promote the oil solubility of the refrigerating device, so that the lubrication effect of the compressor 11 is ensured.

As shown in fig. 1, a second subcooling circuit 40 is disposed between the second sub-heat exchanger 132 and the third sub-heat exchanger 133, the second subcooling circuit 40 includes a second filter 41 and a second expansion valve 42 which are sequentially communicated, an outlet of the second sub-heat exchanger 132 is communicated with an inlet of the second filter 41, an outlet of the second filter 41 is communicated with an inlet of the second expansion valve 42, and an outlet of the second expansion valve 42 is communicated with a circuit inlet of the third sub-heat exchanger 133. By adopting the above structure, by arranging the second supercooling loop 40, the liquid ultralow-temperature refrigerant can be filtered by the second filter 41, the pressure is reduced under the action of the second expansion valve 42, and then the liquid ultralow-temperature refrigerant can be further cooled under the action of the second supercooling loop 40 in the third sub-heat exchanger 133, so that the heat exchange is realized by the third sub-heat exchanger 133, and the refrigerating effect is improved.

It should be noted that, the outlet of the second sub-heat exchanger 132 is respectively connected to the inlets of the second filter 41 and the third sub-heat exchanger 133, so that a part of the liquid ultralow temperature refrigerant is reduced in pressure by the second expansion valve 42, another part of the liquid ultralow temperature refrigerant enters the third sub-heat exchanger 133, the reduced ultralow temperature refrigerant is also introduced into the third sub-heat exchanger 133, so that heat exchange can be realized, further, the liquid ultralow temperature refrigerant entering through the inlet of the third sub-heat exchanger 13 can be cooled, and further, the further cooled liquid ultralow temperature refrigerant is introduced into the cold trap 21, the first evaporator 14 and the second evaporator 22, so as to realize cooling and also realize cooling and drying effects.

The oil separator 15 is provided between the compressor 11 and the condenser 12, and is capable of separating the lubricating oil, the lubricating oil separated in the oil separator 15 is introduced into the inlet of the compressor 11 through the oil return pipe 151, the first solenoid valve 34 is provided in the first supercooling circuit 30, the first solenoid valve 34 is controlled to be opened and closed, the first solenoid valve 34 is controlled to be closed when the first solenoid valve 34 is opened, the second solenoid valve 43 is controlled to be opened and closed when the sample bank is in a supercooled state, and the operating state of the refrigeration assembly 10 is controlled to be convenient to be opened and closed.

The device provided by the embodiment has the following beneficial effects:

(1) The cold trap 21 outside the sample freezing and storing rack, the cylinder in the cold trap 21 is communicated with the circulating air duct, the communicating pipe is wound on the outer side wall of the cylinder, and is communicated with the outlet of the heat exchanger 13, so that when air in the sample warehouse circulates, the cylinder is required to be cooled by utilizing liquid refrigerant flowing in the communicating pipe, and the temperature of the liquid refrigerant is lower, so that the air flowing into the cylinder can be cooled and dried, water in the air frosts on the inner wall of the cylinder, and the air flowing out of the cylinder is dried;

(2) The frost-inhibiting coating is arranged on the outer side wall of the sample freezing and storing frame, so that the problem of frosting on the outer wall of the sample freezing and storing frame can be avoided, the sample freezing and storing frame can be used for a long time, and the sample freezing and storing frame can be conveniently taken out;

(3) Through set up second evaporimeter 22 in the outside of sample cryopreservation frame, the export and the second evaporimeter 22 of heat exchanger 13 communicate, and then under the effect of second evaporimeter 22, can cool off the drying to the outside of sample cryopreservation frame, further promote the defrosting effect in the sample storehouse.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present utility model. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, the numerical tables, expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

In the description of the present utility model, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present utility model; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present utility model.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. A sample library refrigeration device, the sample library refrigeration device comprising:

the circulating air channel can be communicated with the sample freezing region;

a refrigeration assembly (10) comprising a compressor (11), a condenser (12), a heat exchanger (13) and a first evaporator (14) which are communicated, wherein the first evaporator (14) is arranged in the sample freezing area;

defrosting piece (20), including setting up cold trap (21) in the outside of sample cryopreservation area, cold trap (21) include the barrel and around establishing communicating pipe on the lateral wall of barrel, the barrel with circulation wind channel is linked together, the export of heat exchanger (13) respectively with communicating pipe with first evaporimeter (14) are linked together.

2. The sample library cooler of claim 1, wherein a heat generating element is disposed within the cartridge.

3. The sample library freezer of claim 2, wherein the heat generating member comprises a heating wire disposed on an inner side wall of the cartridge.

4. The sample library freezer of claim 1, wherein a frost-inhibiting coating is provided on top of the sample freezing shelf of the sample freezing zone.

5. The sample library refrigerating device according to claim 1, wherein a first end of the cold trap (21) is communicated with the circulating air duct through a first communication pipeline, a second end of the cold trap (21) is communicated with the circulating air duct through a second communication pipeline, a stop valve is arranged on each of the first communication pipeline and the second communication pipeline, and a liquid outlet for discharging condensed liquid is arranged on the cold trap (21).

6. The sample bank refrigeration apparatus of claim 1, wherein the refrigeration assembly (10) further comprises a second evaporator (22), the second evaporator (22) being disposed outside of the sample freezing zone, the outlet of the heat exchanger (13) being in communication with the second evaporator (22).

7. The sample bank refrigeration apparatus according to claim 6, wherein the heat exchanger (13) comprises a first sub heat exchanger (131), a second sub heat exchanger (132) and a third sub heat exchanger (133), the outlet of the compressor (11) is in communication with the inlet of the condenser (12), the outlet of the condenser (12) is in communication with the inlet of the first sub heat exchanger (131), the outlet of the first sub heat exchanger (131) is in communication with the inlet of the second sub heat exchanger (132), the outlet of the second sub heat exchanger (132) is in communication with the inlet of the third sub heat exchanger (133), the outlet of the third sub heat exchanger (133) is in communication with the inlets of the first evaporator (14), the communication pipe and the second evaporator (22), respectively, and the outlets of the first evaporator (14), the communication pipe and the second evaporator (22) are in communication with the inlet of the compressor (11).

8. The sample bank refrigeration apparatus according to claim 7, wherein the first sub heat exchanger (131), the second sub heat exchanger (132) and the third sub heat exchanger (133) are each provided with a circuit inlet and a circuit outlet, respectively, the first evaporator (14), the second evaporator (22) and the outlet of the communication pipe are each in communication with the circuit inlet of the third sub heat exchanger (133), the circuit outlet of the third sub heat exchanger (133) is in communication with the circuit inlet of the second sub heat exchanger (132), the circuit outlet of the second sub heat exchanger (132) is in communication with the circuit inlet of the first sub heat exchanger (131), and the circuit outlet of the first sub heat exchanger (131) is in communication with the inlet of the compressor (11).

9. The sample bank refrigeration apparatus according to claim 7, wherein a first subcooling circuit (30) is provided between the first sub heat exchanger (131) and the second sub heat exchanger (132), the first subcooling circuit (30) includes a gas-liquid separator (31), a first filter (32) and a first expansion valve (33) that are sequentially communicated, an outlet of the first sub heat exchanger (131) is communicated with an inlet of the gas-liquid separator (31), the gas-liquid separator (31) includes a liquid-phase outlet (312) and a gas-phase outlet (311), the liquid-phase outlet (312) is communicated with an inlet of the first filter (32), an outlet of the first filter (32) is communicated with an inlet of the first expansion valve (33), the gas-phase outlet (311) is communicated with an inlet of the second sub heat exchanger (132), and an outlet of the first expansion valve (33) is communicated with a circuit inlet of the second sub heat exchanger (132).

10. The sample bank refrigeration apparatus as recited in claim 7, wherein a second subcooling circuit (40) is disposed between the second sub-heat exchanger (132) and the third sub-heat exchanger (133), the second subcooling circuit (40) comprising a second filter (41) and a second expansion valve (42) that are in sequential communication, an outlet of the second sub-heat exchanger (132) being in communication with an inlet of the second filter (41), an outlet of the second filter (41) being in communication with an inlet of the second expansion valve (42), an outlet of the second expansion valve (42) being in communication with a circuit inlet of the third sub-heat exchanger (133).