CN117515950A - Refrigerating equipment and refrigerating method thereof - Google Patents

Abstract

The invention discloses refrigeration equipment and a refrigeration method thereof, wherein the refrigeration equipment comprises a gas storage device, a secondary refrigerant pump, a precooler, a refrigerator and a gas-liquid separator; the precooler is communicated with the gas storage device through a secondary refrigerant pump and is used for precooling the secondary refrigerant; the input end of the refrigerator is communicated with the output end of the precooler so as to be used for cooling the secondary refrigerant; the input end of the gas-liquid separator is communicated with the output end of the refrigerator, and the output end of the gas-liquid separator is provided with a first cooling pipeline and a second cooling pipeline which are respectively suitable for being communicated with a device to be cooled; and the gas-liquid separator is used for separating the secondary refrigerant into a gas-phase secondary refrigerant and a liquid-phase secondary refrigerant so as to cool the device to be cooled through the gas-phase or liquid-phase secondary refrigerant. The invention provides refrigeration equipment and a refrigeration method thereof, which can automatically select a cooling state according to different requirements of application occasions, effectively solve the problem that a refrigerating medium interferes with or causes unstable use environment, and realize the recovery, storage and recycling of the refrigerating medium.

Description

Refrigerating equipment and refrigerating method thereof

Technical Field

The invention relates to the technical field of ultralow temperature refrigeration, in particular to refrigeration equipment and a refrigeration method thereof.

Background

In the existing ultralow temperature cooling technology, a liquid nitrogen tank is generally adopted for cooling, and liquid nitrogen absorbs heat and is discharged into the environment.

However, the cooling state in the prior art is a gas-liquid two-phase state, which affects the accuracy of the used object in the use occasion with extremely high environmental requirements, and causes unstable use environment. Specifically, in some application scenarios, liquid coolant such as liquid nitrogen can interfere the resolution of the low-temperature electron microscope, and pure gaseous coolant is more beneficial to the low-temperature electron microscope to keep working normally; in other application scenarios, the pure liquid secondary refrigerant is more beneficial to the normal operation of the low-temperature equipment.

Disclosure of Invention

The invention mainly aims to provide refrigeration equipment and a refrigeration method thereof, which aim to realize the independent selection of a cooling state according to different requirements of application occasions so as to solve the problem that a refrigerating medium interferes with or causes unstable use environment and improve refrigeration applicability.

In order to achieve the above object, the present invention also proposes a refrigeration apparatus comprising:

the air inlet end of the air storage device is suitable for being communicated with the air outlet end of the device to be cooled;

the input end of the precooler is communicated with the air outlet end of the air storage device through a refrigerating medium pump so as to be used for precooling refrigerating medium;

the input end of the refrigerator is communicated with the output end of the precooler, so that cold energy is generated and is subjected to heat exchange with the secondary refrigerant to cool the secondary refrigerant; and

the input end of the gas-liquid separator is communicated with the output end of the refrigerator, a first cooling pipeline and a second cooling pipeline which are connected in parallel are arranged at the output end of the gas-liquid separator, and the first cooling pipeline and the second cooling pipeline are both suitable for being communicated with the input end of the device to be cooled; the first cooling pipeline is provided with a first valve, and the second cooling pipeline is provided with a second valve;

the gas-liquid separator is used for separating the secondary refrigerant into a gas-phase secondary refrigerant and a liquid-phase secondary refrigerant so as to cool the device to be cooled through the gas-phase secondary refrigerant or the liquid-phase secondary refrigerant; the first cooling pipeline is used for conveying the gas-phase secondary refrigerant, and the second cooling pipeline is used for conveying the liquid-phase secondary refrigerant.

Optionally, the refrigeration device further comprises a heat regenerator, a hot end input port of the heat regenerator is communicated with an output end of the precooler, a hot end output port of the heat regenerator is communicated with an input end of the refrigerator, a cold end input port of the heat regenerator is suitable for being communicated with an output end of the device to be cooled, and a cold end output port of the heat regenerator is communicated with an air inlet end of the air storage device;

the cold end of the heat regenerator is used for heating the secondary refrigerant; and the hot end of the heat regenerator is used for pre-cooling the secondary refrigerant.

Optionally, the refrigeration device further comprises a heat regenerator, wherein a hot end input port of the heat regenerator is communicated with an output end of the secondary refrigerant pump, a hot end output port of the heat regenerator is communicated with an input end of the precooler, a cold end input port of the heat regenerator is suitable for being communicated with an output end of the device to be cooled, and a cold end output port of the heat regenerator is communicated with an air inlet end of the air storage device;

the cold end of the heat regenerator is used for heating the secondary refrigerant; and the hot end of the heat regenerator is used for pre-cooling the secondary refrigerant.

Optionally, the refrigeration equipment further comprises a heat insulation device, and the heat regenerator, the cold end of the precooler and the cold end of the refrigerator are all arranged in the heat insulation device.

Optionally, the heat insulation device is a vacuum heat insulation box or an aerogel heat insulation box.

Optionally, the first cooling pipeline is communicated with the upper end of the gas-liquid separator, and the second cooling pipeline is communicated with the lower end of the gas-liquid separator.

Optionally, the refrigerator is a thermo-acoustic refrigerator.

In order to achieve the above object, the present invention provides a refrigeration method, comprising the steps of:

when a refrigeration starting instruction is acquired, opening a first valve or a second valve;

starting a secondary refrigerant pump to pump out secondary refrigerant in the gas storage device;

starting a precooler to precool the secondary refrigerant;

starting a refrigerator to generate cold and exchange heat with the secondary refrigerant to cool the secondary refrigerant to a target temperature;

controlling a gas-liquid separator to separate the cooled secondary refrigerant into a gas-phase secondary refrigerant and a liquid-phase secondary refrigerant, and introducing the gas-phase secondary refrigerant or the liquid-phase secondary refrigerant into a device to be cooled so as to cool the device to be cooled;

controlling the secondary refrigerant to flow back to the gas storage device;

and when a refrigerating instruction is acquired, sequentially closing the refrigerator, the precooler, the first valve or the second valve and the refrigerating agent pump.

Optionally, the start-up refrigeration instruction at least includes a gas-phase refrigeration instruction and a liquid-phase refrigeration instruction; the step of opening the first valve or the second valve when the refrigeration opening instruction is obtained specifically includes:

when the gas-phase cooling instruction is acquired, the first valve is opened, and the second valve is kept in a closed state;

and when the liquid-phase cooling instruction is acquired, opening the second valve, and maintaining the first valve in a closed state.

Optionally, after the step of starting the precooler to precool the coolant, the method further comprises:

introducing the secondary refrigerant to the hot end of the heat regenerator to perform secondary precooling on the secondary refrigerant;

the step of controlling the secondary refrigerant to flow back to the gas storage device specifically comprises the following steps:

and introducing the secondary refrigerant flowing out of the device to be cooled to the cold end of the heat regenerator so as to heat the secondary refrigerant and enable the secondary refrigerant to flow into the gas storage device.

In the technical scheme of the invention, the refrigeration equipment comprises a gas storage device, a secondary refrigerant pump, a precooler, a refrigerator and a gas-liquid separator. The air inlet end of the air storage device is suitable for being communicated with the air outlet end of the device to be cooled. The input end of the precooler is communicated with the air outlet end of the air storage device through a secondary refrigerant pump so as to be used for precooling secondary refrigerant. The input end of the refrigerator is communicated with the output end of the precooler, so as to generate cold energy and exchange heat with the secondary refrigerant to cool the secondary refrigerant. The input end of the gas-liquid separator is communicated with the output end of the refrigerator, the output end of the gas-liquid separator is provided with a first cooling pipeline and a second cooling pipeline which are connected in parallel, and the first cooling pipeline and the second cooling pipeline are both suitable for being communicated with the input end of the device to be cooled. Wherein, be equipped with first valve on the first cooling pipeline, be equipped with the second valve on the second cooling pipeline. And the gas-liquid separator is used for separating the secondary refrigerant into a gas-phase secondary refrigerant and a liquid-phase secondary refrigerant so as to cool the device to be cooled through the gas-phase secondary refrigerant or the liquid-phase secondary refrigerant. The first cooling pipeline is used for conveying the gas-phase secondary refrigerant, and the second cooling pipeline is used for conveying the liquid-phase secondary refrigerant. Therefore, the automatic selection of the cooling state according to different requirements of application occasions is realized, so that the problems that the refrigerating medium interferes with the use environment or causes unstable use environment are solved, and the refrigeration applicability is improved. In addition, the cooling system is in closed circulation, so that the problem that the refrigerating medium supplied by the liquid nitrogen tank cannot be recycled and stored is solved, and the refrigeration cost is saved.

Drawings

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

FIG. 1 is a schematic view of an embodiment of a refrigeration apparatus according to the present invention;

FIG. 2 is a schematic view of another embodiment of the refrigeration apparatus of the present invention;

FIG. 3 is a schematic view of a refrigeration apparatus according to another embodiment of the present invention;

fig. 4 is a schematic flow chart of an embodiment of the refrigeration method of the present invention.

Reference numerals illustrate:

1. a refrigeration device; 2. an application end; 100. a device to be cooled; 10. a gas storage device; 20. a coolant pump; 30. a precooler; 40. a refrigerating machine; 50. a gas-liquid separator; 60. a regenerator; 41. a first cold supply duct; 42. a second cooling duct; 411. a first valve; 421. a second valve; 70. and a heat insulation device.

The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, if the meaning of "and/or" is presented throughout this document, it is intended to include three schemes in parallel, taking "a and/or B" as an example, including a scheme, or B scheme, or a scheme where a and B meet simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.

The invention provides refrigeration equipment which can be suitable for circularly supplying a gaseous secondary refrigerant to a device which needs to work in a low-temperature environment adopting gaseous cooling, in particular to a low-temperature electron microscope; the method is also applicable to the cyclic supply of liquid coolant to devices that are required to operate in a low temperature environment employing liquid cooling, and is not limited thereto.

Referring to fig. 1 to 3, in an embodiment of the present invention, the refrigeration apparatus 1 and the application end 2 may be connected through a cooling pipeline, the application end 2 is a closed structure, and a low-temperature electron microscope waiting cooling device 100 may be placed therein. The refrigeration apparatus 1 includes a gas storage device 10, a coolant pump 20, a precooler 30, a refrigerator 40, and a gas-liquid separator 50. The gas inlet end of the gas storage device 10 is adapted to communicate with the gas outlet end of the device 100 to be cooled. The input of the precooler 30 communicates with the output of the gas storage device 10 via the coolant pump 20 for precooling the coolant. An input of the chiller 40 communicates with an output of the precooler 30 for generating and exchanging heat with the coolant to cool the coolant. The input end of the gas-liquid separator 50 is communicated with the output end of the refrigerator 40, the output end of the gas-liquid separator 50 is provided with a first cooling pipeline 41 and a second cooling pipeline 42 which are arranged in parallel, and the first cooling pipeline 41 and the second cooling pipeline 42 are both suitable for being communicated with the input end of the device 100 to be cooled; wherein, the first cooling pipe 41 is provided with a first valve 411, and the second cooling pipe 42 is provided with a second valve 421. A gas-liquid separator 50 for separating the coolant into a gas-phase coolant and a liquid-phase coolant to cool the device to be cooled 100 by the gas-phase coolant or the liquid-phase coolant; the first cooling duct 41 is for conveying the gaseous coolant and the second cooling duct 42 is for conveying the liquid coolant.

The gas storage device 10 may be a storage tank, in which a liquid coolant, a gas coolant, or both may be stored, but is not limited thereto.

In this embodiment, the first valve 411 and the second valve 421 can be electromagnetic valves, manual valves, or a combination of both, which is not limited herein.

If gas-phase cooling is required, the refrigeration system controls the first valve 411 to be opened so that the gas-phase coolant is introduced into the device to be cooled 100 through the first cooling pipe 41; if liquid-phase cooling is desired, the refrigeration system controls the second valve 421 to open to allow liquid-phase coolant to pass through the second cooling conduit 42 to the apparatus 100 to be cooled.

In the present embodiment, the refrigerator 40 may be a thermo-acoustic refrigerator, etc., and the internal circulation medium of the thermo-acoustic refrigerator is not limited. The refrigerating temperature of the refrigerator 40 can be below-100 ℃, particularly when the refrigerating temperature is about-190 ℃, the gaseous secondary refrigerant is cooled to about-190 ℃, the problem that liquid secondary refrigerant such as liquid nitrogen and the like interferes with the resolution of the low-temperature electron microscope can be effectively solved, and the performance of the low-temperature electron microscope can be in a better state.

In addition, when the refrigerator 40 of the refrigeration apparatus 1 is a thermo-acoustic refrigerator, the heat dissipation end of the thermo-acoustic refrigerator may be provided with a heat dissipation member, and the heat dissipation member may be a fan, a liquid cooling member, or a combination of air cooling and liquid cooling, which is not limited herein.

The pre-cooler 30 may employ a thermoelectric refrigeration or other principle type refrigeration device, a non-thermo-acoustic principle refrigeration device, and the cold side of the pre-cooler 30 provides cooling to pre-cool the coolant.

In the technical scheme of the invention, the refrigeration equipment 1 comprises a gas storage device 10, a secondary refrigerant pump 20, a precooler 30, a refrigerator 40 and a gas-liquid separator 50; the air inlet end of the air storage device 10 is suitable for being communicated with the air outlet end of the device 100 to be cooled; the input end of the precooler 30 is communicated with the air outlet end of the air storage device 10 through the refrigerating medium pump 20 for precooling the refrigerating medium; an input of the refrigerator 40 communicates with an output of the precooler 30 for generating and exchanging heat with the coolant to cool the coolant; the input end of the gas-liquid separator 50 is communicated with the output end of the refrigerator 40, the output end of the gas-liquid separator 50 is provided with a first cooling pipeline 41 and a second cooling pipeline 42 which are connected in parallel, and the first cooling pipeline 41 and the second cooling pipeline 42 are both suitable for being communicated with the input end of the device 100 to be cooled; wherein, the first cooling pipe 41 is provided with a first valve 411, and the second cooling pipe 42 is provided with a second valve 421; a gas-liquid separator 50 for separating the coolant into a gas-phase coolant and a liquid-phase coolant to cool the device to be cooled 100 by the gas-phase coolant or the liquid-phase coolant; the first cooling duct 41 is for conveying the gaseous coolant and the second cooling duct 42 is for conveying the liquid coolant. Therefore, the automatic selection of the cooling state according to different requirements of application occasions is realized, so that the problems that the refrigerating medium interferes with the use environment or causes unstable use environment are solved, and the refrigeration applicability is improved. In addition, the cooling system is in closed circulation, so that the problem that the refrigerating medium supplied by the liquid nitrogen tank cannot be recycled and stored is solved, and the refrigeration cost is saved.

In addition, the refrigerating equipment 1 can store a certain amount of secondary refrigerant by arranging the gas storage device 10, so that the whole refrigerating process can be ensured to be more stable, and the refrigerating effect is better.

Referring to fig. 1 to 3, in an embodiment, the refrigeration apparatus 1 further comprises an integral heat insulation device 70, the cold end of the precooler 20 and the cold end of the refrigerator 30 being both disposed within the integral heat insulation device 70; the integral heat insulation device 70 is a vacuum heat insulation box, an aerogel heat insulation box, or the like.

By providing the integral heat insulation device 70, the heat insulation effect of the refrigeration equipment 1 is improved, and the heat exchange between the refrigeration equipment and the outside can be reduced as much as possible, so that the refrigeration stability is ensured.

Referring to FIG. 1, in one embodiment, the coolant pump 20 can be a cryopump having an input adapted to communicate with an output of the apparatus 100 to be cooled and an output of the cryopump communicating with an input of the refrigerator 40.

The cryopump is a vacuum pump that condenses a gas on a low-temperature surface, and is also called a condensing pump. The cryopump can obtain clean vacuum with the maximum pumping rate and the lowest limiting pressure, and is widely applied to research and production of semiconductors and integrated circuits, molecular beam research, vacuum coating equipment, vacuum surface analysis instruments, ion implanters, space simulation devices and the like.

In this embodiment, the circulating flow direction of the coolant is: the cold end cold tray of the refrigerator 40 generates cold energy to exchange heat with the cold medium, the cold medium enters the gas-liquid separator 50 after being cooled, the gas-liquid separator 50 separates the cold medium into gas-phase cold medium or liquid-phase cold medium, the gas-phase cold medium enters an application place through the first cold supply pipeline 41 or the liquid-phase cold medium through the second cold supply pipeline 42, the corresponding cold object is cooled, then the cold medium absorbs heat in the application place and then flows back to the gas storage device 10, then enters the cold end of the precooler 30 to be precooled under the driving of the cryopump, and then enters the cold tray of the refrigerator 40 to be circularly reciprocated in this way.

Of course, in some other embodiments, as shown in FIG. 2, the coolant pump 20 may also be a conventional pump, and the refrigeration apparatus 1 may further include a regenerator 60, by employing a combination of a conventional pump and the regenerator 60 in place of the cryopump described above, to achieve similar delivery and pre-cooling effects.

In this embodiment, the hot end input port of the regenerator 60 is connected to the output end of the precooler 30, the hot end output port of the regenerator 60 is connected to the input end of the refrigerator 40, the cold end input port of the regenerator 60 is adapted to be connected to the output end of the device to be cooled 100, and the cold end output port of the regenerator 60 is connected to the air inlet end of the air storage device 10. The cold end of regenerator 60 is used for heating the coolant; the hot side of regenerator 60 is used to pre-cool the coolant.

In this embodiment, the circulating flow direction of the coolant is: the cold end cold tray of the refrigerator 40 generates cold energy to exchange heat with the refrigerating medium, the refrigerating medium enters the gas-liquid separator 50 after being cooled, the refrigerating medium is separated into gas-phase refrigerating medium and liquid-phase refrigerating medium by the gas-liquid separator 50, the gas-phase refrigerating medium enters the application occasion through the first cooling pipeline 41 or the liquid-phase refrigerating medium through the second cooling pipeline 42, the corresponding cold object is cooled, the gas-phase refrigerating medium or the liquid-phase refrigerating medium absorbs heat in the application environment and then flows back to the cold end of the regenerator 60, the cold end of the regenerator 60 absorbs heat and then enters the gas storage device 10, the cold end of the precooler 30 is precooled through the conventional pump, the hot end of the regenerator 60 releases heat to be precooled, and finally the cold tray of the refrigerator 40 is circularly reciprocated.

Of course, in another embodiment, the hot side of the regenerator 60 may also be disposed between the coolant pump 20 and the pre-cooler 30, as shown in fig. 3, the hot side input of the regenerator 60 is connected to the output of the coolant pump 10, the hot side output of the regenerator 60 is connected to the input of the pre-cooler 30, the cold side input of the regenerator 60 is adapted to be connected to the output of the device to be cooled 100, and the cold side output of the regenerator 60 is connected to the air inlet of the air storage device 10.

It should be noted that, since the density of the gaseous coolant is smaller than that of the liquid coolant, the gaseous coolant will rise to the upper layer of the gas-liquid separator 50 in the gas-liquid separator 50, while the liquid coolant is located at the lower layer of the gas-liquid separator 50. Thus, in the present embodiment, referring to fig. 1, the first cooling duct 41 may communicate with the upper end of the gas-liquid separator 50, and the second cooling duct 42 may communicate with the lower end of the gas-liquid separator 50. In this way, the gas-phase coolant and the liquid-phase coolant can be conveniently and respectively conveyed, and the two cooling mediums are prevented from being mixed together to influence the performance of the device 100 to be cooled.

To improve the cooling accuracy of the cooling apparatus 1, in one embodiment, a temperature sensor may be disposed on the conduit between the cooler 40 and the gas-liquid separator 50 for detecting the temperature of the coolant output from the output of the cooler 40.

In this embodiment, the refrigeration system can timely adjust the refrigeration temperature of the refrigerator 40 according to the cooling temperature detected by the temperature sensor in real time, so that the temperature of the gas-phase coolant or the liquid-phase coolant reaches a preferred value, so as to meet the requirements of different application scenarios.

In order to realize the independent selection of the cooling state according to different requirements of application occasions, solve the problem that the refrigerating medium causes interference to the use environment or causes unstable use environment, and realize the recovery, storage and recycling of the refrigerating medium, the invention also provides a refrigerating method, based on the refrigerating equipment 1, referring to fig. 1 and 4, which comprises the following steps:

and step S10, opening the first valve or the second valve when the opening refrigeration instruction is acquired.

In this embodiment, the on-refrigeration command may include at least a vapor-phase cooling command and a liquid-phase cooling command.

The step S10 may specifically include:

step S11, when the gas-phase cooling instruction is acquired, opening the first valve, and maintaining the second valve in a closed state;

and step S12, when the liquid-phase cooling instruction is acquired, opening the second valve, and maintaining the first valve in a closed state.

In other words, if gas-phase cooling is required, the refrigeration system controls the first valve 411 to be opened, so that the gas-phase coolant is introduced into the device to be cooled 100 through the first cooling pipe 41; if liquid-phase cooling is desired, the refrigeration system controls the second valve 421 to open to allow liquid-phase coolant to pass through the second cooling conduit 42 to the apparatus 100 to be cooled.

And step S20, starting a secondary refrigerant pump to pump out the secondary refrigerant in the gas storage device.

In this embodiment, the coolant pump 20 can be a cryopump or a conventional pump, which is not limited in this regard.

And step S30, starting a precooler to precool the secondary refrigerant.

In this embodiment, the precooler 30 may use a thermoelectric refrigeration or other principle type refrigeration device, a non-thermo-acoustic principle refrigeration device, and the cold end of the precooler 30 provides cold to pre-cool the coolant. In this way, the refrigerating efficiency and effect can be further improved.

And step S40, starting the refrigerator to generate cold energy and performing heat exchange with the secondary refrigerant to cool the secondary refrigerant to a target temperature.

In this embodiment, the refrigerator 40 is preferably a thermo-acoustic refrigerator, and the target temperature may be-100 ℃ or lower, which is not limited.

And S50, controlling a gas-liquid separator to separate the cooled secondary refrigerant into a gas-phase secondary refrigerant and a liquid-phase secondary refrigerant, and introducing the gas-phase secondary refrigerant or the liquid-phase secondary refrigerant into a device to be cooled so as to cool the device to be cooled.

In this embodiment, the gas-liquid separator 50 separates the flowing coolant into a gas-phase coolant and a liquid-phase coolant, and the gas-phase coolant is located at an upper layer inside the gas-liquid separator 50 and the liquid-phase coolant is located at a lower layer inside the gas-liquid separator 50 due to different densities of different mediums.

And step S60, controlling the secondary refrigerant to flow back to the gas storage device.

Referring to FIG. 1, in this process, the circulating flow direction of the coolant is: the cold end cold tray of the refrigerator 40 generates cold energy to exchange heat with the cold medium, the cold medium enters the gas-liquid separator 50 after being cooled, the gas-liquid separator 50 separates the cold medium into gas-phase cold medium and liquid-phase cold medium, the gas-phase cold medium enters an application place through the first cold supply pipeline 41 or the liquid-phase cold medium through the second cold supply pipeline 42, the corresponding cold object is cooled, then the cold medium absorbs heat in the application place and then flows back to the gas storage device 10, then enters the cold end of the precooler 30 to be precooled under the driving of the cryopump, and then enters the cold tray of the refrigerator 40 to be circularly reciprocated in this way.

And step S70, when a refrigerating instruction is acquired, sequentially closing the refrigerator, the precooler, the first valve or the second valve and the secondary refrigerant pump.

So far, the refrigerating system receives a shutdown instruction of a user and finishes the refrigerating work. Wherein the system closes one of the first valve 411 and the second valve 421 in an open state, i.e., closes the first valve 411 when gas phase cooling is employed, and closes the second valve 421 when liquid phase cooling is employed.

Referring to fig. 2 and 3, in some other embodiments, when a conventional pump and regenerator are used in place of the cryopump, after step S30 of starting the precooler to pre-cool the coolant, it further includes:

and S31, introducing the secondary refrigerant to the hot end of the heat regenerator to perform secondary precooling on the secondary refrigerant.

The refrigerating effect and effect of the refrigerating apparatus 1 can be further improved by performing the pre-cooling process again on the coolant by the regenerator 60 before the refrigerating machine 40 cools.

The step S60 of controlling the secondary refrigerant to flow back to the gas storage device specifically includes:

and step S61, introducing the secondary refrigerant flowing out of the device to be cooled into the cold end of the heat regenerator so as to heat the secondary refrigerant and enable the secondary refrigerant to flow into the gas storage device.

Before the coolant flows back to the gas storage device 10, the coolant absorbs heat at the cold end of the back flow device and flows into the gas storage device 10, so that a conventional pump pumps the coolant in the gas storage device 10 out to the pre-cooler 30.

Referring to FIG. 2, in this process, the circulating flow direction of the coolant is: the cold end cold tray of the refrigerator 40 generates cold energy to exchange heat with the refrigerating medium, the refrigerating medium enters the gas-liquid separator 50 after being cooled, the refrigerating medium is separated into gas-phase refrigerating medium and liquid-phase refrigerating medium by the gas-liquid separator 50, the gas-phase refrigerating medium enters the application occasion through the first cooling pipeline 41 or the liquid-phase refrigerating medium through the second cooling pipeline 42, the corresponding cold object is cooled, the gas-phase refrigerating medium or the liquid-phase refrigerating medium absorbs heat in the application environment and then flows back to the cold end of the regenerator 60 to absorb heat, the heat is absorbed by the cold end of the regenerator 60 and then enters the gas storage device 10, the heat is transferred to the cold end of the precooler 30 through the conventional pump to be precooled, the heat is released by the hot end of the regenerator 60 to be precooled, and finally the cold tray of the refrigerator 40 is circularly reciprocated.

The foregoing description is only of the optional embodiments of the present invention, and is not intended to limit the scope of the invention, and all the equivalent structural changes made by the description of the present invention and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the invention.

Claims (10)

1. A refrigeration appliance, comprising:

the air inlet end of the air storage device is suitable for being communicated with the air outlet end of the device to be cooled;

the input end of the precooler is communicated with the air outlet end of the air storage device through a refrigerating medium pump so as to be used for precooling refrigerating medium;

the input end of the refrigerator is communicated with the output end of the precooler, so that cold energy is generated and is subjected to heat exchange with the secondary refrigerant to cool the secondary refrigerant; and

the input end of the gas-liquid separator is communicated with the output end of the refrigerator, a first cooling pipeline and a second cooling pipeline which are connected in parallel are arranged at the output end of the gas-liquid separator, and the first cooling pipeline and the second cooling pipeline are both suitable for being communicated with the input end of the device to be cooled; the first cooling pipeline is provided with a first valve, and the second cooling pipeline is provided with a second valve;

the gas-liquid separator is used for separating the secondary refrigerant into a gas-phase secondary refrigerant and a liquid-phase secondary refrigerant so as to cool the device to be cooled through the gas-phase secondary refrigerant or the liquid-phase secondary refrigerant; the first cooling pipeline is used for conveying the gas-phase secondary refrigerant, and the second cooling pipeline is used for conveying the liquid-phase secondary refrigerant.

2. The refrigeration apparatus of claim 1 further comprising a regenerator having a hot side input in communication with the output of the precooler, a hot side output in communication with the input of the refrigerator, a cold side input in communication with the output of the device to be cooled, and a cold side output in communication with the air intake of the air reservoir;

the cold end of the heat regenerator is used for heating the secondary refrigerant; and the hot end of the heat regenerator is used for pre-cooling the secondary refrigerant.

3. The refrigeration apparatus of claim 1 further comprising a regenerator having a hot side input in communication with an output of the coolant pump, a hot side output in communication with an input of the precooler, a cold side input in communication with an output of the device to be cooled, and a cold side output in communication with an inlet of the gas storage device;

the cold end of the heat regenerator is used for heating the secondary refrigerant; and the hot end of the heat regenerator is used for pre-cooling the secondary refrigerant.

4. A refrigeration apparatus according to claim 2 or claim 3 further comprising a thermal insulation means, said regenerator, said cold end of said precooler and said cold end of said refrigerator being disposed within said thermal insulation means.

5. The refrigeration apparatus of claim 4 wherein said insulating means is a vacuum insulation box or an aerogel insulation box.

6. The refrigeration apparatus of claim 1 wherein said first cooling conduit communicates with an upper end of said vapor-liquid separator and said second cooling conduit communicates with a lower end of said vapor-liquid separator.

7. The refrigeration apparatus of claim 1 wherein said refrigerator is a thermo-acoustic refrigerator.

8. A refrigeration method, based on a refrigeration apparatus according to any one of claims 1 to 7, comprising the steps of:

when a refrigeration starting instruction is acquired, opening a first valve or a second valve;

starting a secondary refrigerant pump to pump out secondary refrigerant in the gas storage device;

starting a precooler to precool the secondary refrigerant;

starting a refrigerator to generate cold and exchange heat with the secondary refrigerant to cool the secondary refrigerant to a target temperature;

controlling a gas-liquid separator to separate the cooled secondary refrigerant into a gas-phase secondary refrigerant and a liquid-phase secondary refrigerant, and introducing the gas-phase secondary refrigerant or the liquid-phase secondary refrigerant into a device to be cooled so as to cool the device to be cooled;

controlling the secondary refrigerant to flow back to the gas storage device;

and when a refrigerating instruction is acquired, sequentially closing the refrigerator, the precooler, the first valve or the second valve and the refrigerating agent pump.

9. The refrigeration method of claim 8, wherein said on refrigeration command comprises at least a vapor phase refrigeration command and a liquid phase refrigeration command;

the step of opening the first valve or the second valve when the refrigeration opening instruction is obtained specifically includes:

when the gas-phase cooling instruction is acquired, the first valve is opened, and the second valve is kept in a closed state;

and when the liquid-phase cooling instruction is acquired, opening the second valve, and maintaining the first valve in a closed state.

10. A method of refrigeration as recited in claim 8 wherein said step of starting up a precooler to precool said coolant further comprises:

introducing the secondary refrigerant to the hot end of the heat regenerator to perform secondary precooling on the secondary refrigerant;

the step of controlling the secondary refrigerant to flow back to the gas storage device specifically comprises the following steps:

and introducing the secondary refrigerant flowing out of the device to be cooled to the cold end of the heat regenerator so as to heat the secondary refrigerant and enable the secondary refrigerant to flow into the gas storage device.