CN112944775A - A low temperature refrigerator - Google Patents
A low temperature refrigerator Download PDFInfo
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- CN112944775A CN112944775A CN202110182968.0A CN202110182968A CN112944775A CN 112944775 A CN112944775 A CN 112944775A CN 202110182968 A CN202110182968 A CN 202110182968A CN 112944775 A CN112944775 A CN 112944775A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
- F25D11/02—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
- F25D11/022—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures with two or more evaporators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B25/00—Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups F25B1/00 - F25B23/00
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B40/00—Subcoolers, desuperheaters or superheaters
- F25B40/06—Superheaters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/06—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point using expanders
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D19/00—Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infrared detectors
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- Mechanical Engineering (AREA)
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- General Engineering & Computer Science (AREA)
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- Combustion & Propulsion (AREA)
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Abstract
本申请属于制冷技术领域，特别是涉及一种低温冰箱。现有低温冰箱多采用复叠式制冷或者混合制冷剂，蒸发温度不可调节，并且系统复杂，体积大。本申请提供了一种低温冰箱，包括依次连接的气体制冷组件、流量调节组件和换热组件，所述换热组件设置于冷箱内，所述换热组件与所述气体制冷组件连接，所述气体制冷组件与散热组件连接。气体制冷组件可通过调节转速调节压比，控制低温冰箱的最低温度，再通过流量调节组件控制最后送入冰箱的冷量，实现速冻或者保存。
The present application belongs to the technical field of refrigeration, and in particular relates to a low-temperature refrigerator. The existing low-temperature refrigerators mostly use cascade refrigeration or mixed refrigerants, the evaporation temperature cannot be adjusted, and the system is complex and bulky. The application provides a low-temperature refrigerator, comprising a gas refrigeration component, a flow regulating component and a heat exchange component connected in sequence, the heat exchange component is arranged in the cold box, the heat exchange component is connected with the gas refrigeration component, and the heat exchange component is connected to the gas refrigeration component. The gas refrigeration assembly is connected with the heat dissipation assembly. The gas refrigeration component can adjust the pressure ratio by adjusting the rotation speed, control the minimum temperature of the low-temperature refrigerator, and then control the amount of cold finally sent to the refrigerator through the flow adjustment component to achieve quick freezing or preservation.
Description
Technical Field
The application belongs to the technical field of refrigeration, and particularly relates to a low-temperature refrigerator.
Background
The refrigerator is a refrigeration device for keeping food or other articles in a constant low-temperature cold state, the lowest temperature is usually only-18 ℃, and the refrigerator needs lower temperature for scientific research, preservation of medical supplies, low-temperature experiment and storage of special materials such as biological products, ocean-going products, electronic components, chemical materials and the like. A need has arisen for a cryogenic refrigerator.
The existing low-temperature refrigerator mostly adopts cascade refrigeration or mixed refrigerant, the evaporation temperature can not be adjusted, and the system is complex and has large volume.
Disclosure of Invention
1. Technical problem to be solved
Based on the problems that the existing low-temperature refrigerator mostly adopts cascade refrigeration or mixed refrigerant, the evaporation temperature cannot be adjusted, the system is complex and the size is large, the application provides the low-temperature refrigerator.
2. Technical scheme
In order to reach foretell purpose, this application provides a low temperature refrigerator, including gaseous refrigeration subassembly, flow control subassembly and the heat exchange assemblies who connects gradually, heat exchange assemblies sets up in the cold box, heat exchange assemblies with gaseous refrigeration subassembly is connected, gaseous refrigeration subassembly is connected with radiator unit.
Another embodiment provided by the present application is: the gas refrigeration assembly comprises a centrifugal compression and expansion integrated machine, the centrifugal compression and expansion integrated machine is connected with a post-stage cooler, the centrifugal compression and expansion integrated machine is connected with a low-temperature heat regenerator, and the post-stage cooler is connected with the low-temperature heat regenerator.
Another embodiment provided by the present application is: the centrifugal compression-expansion all-in-one machine comprises a compressor, an expander and a high-speed motor, wherein the compressor, the expander and the high-speed motor are coaxially and integrally arranged.
Another embodiment provided by the present application is: the compressor includes compression import and compression export, the expander includes expansion import and expansion export, low temperature regenerator includes hot side and cold side, the cold side with the compression import is connected, the hot side with the expansion import is connected, the hot side is connected with radiator unit, radiator unit is the fan.
Another embodiment provided by the present application is: the flow regulating assembly comprises a first flow regulating valve, a second flow regulating valve and a third flow regulating valve, one end of the first flow regulating valve is connected with the cold side, the other end of the first flow regulating valve is connected with the heat exchange assembly, and the first flow regulating valve is connected with the third flow regulating valve; one end of the second flow regulating valve is connected with the expansion outlet, the other end of the second flow regulating valve is connected with the heat exchange assembly, the second flow regulating valve is connected with the third flow regulating valve, and the third flow regulating valve is connected with the heat exchange assembly.
Another embodiment provided by the present application is: the heat exchange assembly is arranged in the cold box, the third flow regulating valve is arranged in the cold box, the heat exchange assembly comprises a first low-temperature heat exchanger and a second low-temperature heat exchanger, the first low-temperature heat exchanger is connected with the expansion outlet, the first low-temperature heat exchanger and the third flow regulating valve are sequentially connected with the second low-temperature heat exchanger, and the second low-temperature heat exchanger is connected with the cold side.
Another embodiment provided by the present application is: the cold box comprises a quick-freezing area and a preservation area, the first low-temperature heat exchanger is arranged in the quick-freezing area, and the second low-temperature heat exchanger is arranged in the preservation area.
Another embodiment provided by the present application is: the first low-temperature heat exchanger is a gas-gas low-temperature heat exchanger and adopts gas and gas for heat exchange, and the second low-temperature heat exchanger is a gas-gas low-temperature heat exchanger and adopts gas and gas for heat exchange.
Another embodiment provided by the present application is: the centrifugal compression-expansion all-in-one machine comprises a rotor, and the rotor is supported by a gas bearing.
Another embodiment provided by the present application is: the gas refrigeration component can adopt different working media according to different temperatures, and the working media can be gases such as carbon dioxide or nitrogen.
3. Advantageous effects
Compared with the prior art, the low temperature refrigerator that this application provided's beneficial effect lies in:
the application provides a low temperature refrigerator, for adopting gaseous cryogenic low temperature refrigerator.
The application provides a low temperature refrigerator, the gaseous refrigeration subassembly accessible is adjusted the rotational speed and is adjusted the pressure ratio, controls low temperature refrigerator's minimum temperature, and the cold volume that refrigerator was sent into at last in rethread flow control subassembly control realizes quick-freezing or preserves.
The application provides a low temperature refrigerator uses centrifugal compression expansion all-in-one gas refrigeration, can realize the regulation of air supply temperature, and holistic temperature range is adjusted through being suitable for different working mediums, adjusts the temperature through adjusting the rotational speed under the same working medium, and the end is adjusted cold volume through the flow of adjusting low temperature heat exchanger, realizes the multiple regulation of temperature.
Drawings
FIG. 1 is a schematic view of the cryogenic refrigerator of the present application;
FIG. 2 is a schematic view of the application in a use state of the low temperature refrigerator;
FIG. 3 is a schematic view of the application in a second use state of the low temperature refrigerator;
in the figure: the system comprises a 1-centrifugal compression and expansion integrated machine, a 2-stage aftercooler, a 3-low-temperature heat regenerator, a 4-first flow regulating valve, a 5-second flow regulating valve, a 6-third flow regulating valve, a 7-first low-temperature heat exchanger, an 8-second low-temperature heat exchanger, a 9-quick freezing area and a 10-storage area.
Detailed Description
Hereinafter, specific embodiments of the present application will be described in detail with reference to the accompanying drawings, and it will be apparent to those skilled in the art from this detailed description that the present application can be practiced. Features from different embodiments may be combined to yield new embodiments, or certain features may be substituted for certain embodiments to yield yet further preferred embodiments, without departing from the principles of the present application.
Referring to fig. 1-3, the application provides a low temperature refrigerator, including gaseous refrigeration subassembly, flow control subassembly and the heat exchange assemblies who connects gradually, the heat exchange assemblies sets up in the cold box, the heat exchange assemblies with gaseous refrigeration subassembly is connected, gaseous refrigeration subassembly is connected with radiator unit.
The circulating system of the refrigerator adopts a gas refrigeration component, gas does not generate phase change, and the refrigeration effect is obtained through high-efficiency near-isentropic expansion. And the flow regulating assembly is used for regulating the flow of the gas entering the heat exchange assembly, so that the control of the cold quantity is realized. The gas refrigeration assembly is helped to operate more stably through the heat dissipation assembly.
Further, the gas refrigeration assembly comprises a centrifugal compression and expansion all-in-one machine 1, the centrifugal compression and expansion all-in-one machine 1 is connected with a stage rear cooler 2, the centrifugal compression and expansion all-in-one machine 1 is connected with a low-temperature heat regenerator 3, and the stage rear cooler 2 is connected with the low-temperature heat regenerator 3.
The centrifugal compression and expansion integrated machine 1 is used for realizing the compression and expansion of gas, and the low-temperature heat regenerator 3, the after-stage cooler 2 and the heat exchange assembly are used for carrying out heat exchange.
The low-temperature refrigerator adopts the centrifugal compression-expansion integrated machine 1, is highly integrated, simple in structure and small in size, recovers expansion work and improves system efficiency; the centrifugal compression-expansion all-in-one machine 1 can adjust the system pressure ratio by adjusting the rotating speed, controls the temperature of an expansion outlet, namely the lowest temperature of a low-temperature refrigerator, and controls the cold quantity finally sent into the refrigerator through a flow adjusting assembly, thereby realizing the requirements of quick freezing or storage.
Further, the centrifugal compression-expansion all-in-one machine 1 comprises a compressor, an expander and a high-speed motor, wherein the compressor, the expander and the high-speed motor are coaxially and integrally arranged.
The centrifugal compression-expansion all-in-one machine 1 is used, the compression impeller, the expansion impeller and the rotor of the high-speed motor are coaxially arranged, the centrifugal compression-expansion all-in-one machine 1 is used for simultaneously realizing the gas expansion and compression processes of the system, the system is simpler, more reliable and more compact, in addition, the system utilizes the expansion impeller to recover work and supplies the work to the compressor, the power consumption of the motor is reduced, and the efficiency of the system is improved.
A centrifugal compressor-expander 1 is used. The compressor, the expander and the high-speed motor are coaxially and integrally arranged, the structure is simple, the size is reduced, the expansion work is recovered, and the system efficiency is improved. And the gas bearing is used, so that no abrasion and no lubricating oil exist. Long service life, high reliability, obvious maintenance cost, no lubricating oil and no pollution to air supply.
Further, the compressor includes compression import and compression export, the expander includes expansion import and expansion export, low temperature regenerator 3 includes hot side and cold side, the cold side with the compression import is connected, the hot side with the expansion import is connected, the hot side is connected with radiator unit, radiator unit is the fan. The fan here can help the low temperature regenerator 3 dissipate heat.
Further, the flow regulating assembly comprises a first flow regulating valve 4, a second flow regulating valve 5 and a third flow regulating valve 6, one end of the first flow regulating valve 4 is connected with the cold side, the other end of the first flow regulating valve 4 is connected with the heat exchange assembly, and the first flow regulating valve 4 is connected with the third flow regulating valve 6; one end of the second flow regulating valve 5 is connected with the expansion outlet, the other end of the second flow regulating valve 5 is connected with the heat exchange assembly, the second flow regulating valve 5 is connected with the third flow regulating valve 6, and the third flow regulating valve 6 is connected with the heat exchange assembly.
Further, the heat exchange assembly is arranged in a cold box, the third flow regulating valve 6 is arranged in the cold box, the heat exchange assembly comprises a first low-temperature heat exchanger 7 and a second low-temperature heat exchanger 8, the first low-temperature heat exchanger 7 is connected with the expansion outlet, the first low-temperature heat exchanger 7 and the third flow regulating valve 6 are sequentially connected with the second low-temperature heat exchanger 8, and the second low-temperature heat exchanger 8 is connected with the cold side.
Further, the cold box comprises a quick-freezing area 9 and a preservation area 10, the first low-temperature heat exchanger 7 is arranged in the quick-freezing area 9, and the second low-temperature heat exchanger 8 is arranged in the preservation area 10.
The low-temperature refrigerator can simultaneously have two or more storerooms with different temperature areas, for example, a small-cold-quantity (higher-temperature) storage area 10 and a large-cold-quantity (lower-temperature) quick-freezing area 9, and under the parallel mode, the flow supplied to the two low-temperature heat exchangers can be adjusted by adjusting the first flow adjusting valve 4 and the second flow adjusting valve 5, so that the cold quantities can be reasonably distributed to the storerooms with different temperature areas. Under the series connection mode, the first low-temperature heat exchanger 7 and the second low-temperature heat exchanger 8 exchange heat in sequence, and different temperatures in different storage rooms are achieved.
Further, the first low-temperature heat exchanger 7 is a gas-gas low-temperature heat exchanger for exchanging heat between gas and gas, and the second low-temperature heat exchanger 8 is a gas-gas low-temperature heat exchanger for exchanging heat between gas and gas.
Further, the centrifugal compression-expansion all-in-one machine 1 comprises a rotor, and the rotor is supported by a gas bearing.
Furthermore, the gas refrigeration component can adopt different working media according to different temperatures, and the working media are carbon dioxide or nitrogen.
Different working media can be adopted according to different requirements of temperature, for example, carbon dioxide can be used as the working media at the normal temperature to minus 50 ℃, and nitrogen can be used as the working media at the normal temperature to minus 195 ℃. The applicable temperature range of the system is wide due to the wide range of the adopted gas.
The cold quantity and the temperature can be adjusted. The temperature demand of different scopes can be realized through changing working medium, can adjust system pressure ratio and expansion ratio through the rotational speed of adjusting centrifugal compression expansion all-in-one 1 in addition to the temperature and the cold volume of control expansion outlet, through the gas flow of flow control subassembly control entering heat exchange assemblies, the temperature and the cold volume of control different storerooms.
And (5) quick-freezing at low temperature. The flow is adjusted through the flow adjusting assembly, more low-temperature gas is sent into the first low-temperature heat exchanger 7 of the quick-freezing area, large cooling capacity is provided for the quick-freezing area 9, and quick freezing is effectively achieved.
The application relates to a low-temperature refrigerator adopting gas refrigeration, which can adopt different working media according to temperature requirements. The low-temperature refrigerator is composed of a centrifugal compression and expansion all-in-one machine 1, a low-temperature heat regenerator 3, a post-stage cooler 2, a flow regulating assembly, a cold end heat exchange assembly and a cold box. The centrifugal compression-expansion integrated machine 1 integrates an expansion machine, a compressor and a high-speed motor into a whole to coaxially work, and changes of temperature and pressure of working medium gas are achieved. The low-temperature heat regenerator 3 is used for recovering cold energy and reducing temperature. And the after-stage cooler 2 is connected to a compression outlet of the centrifugal compression-expansion all-in-one machine 1 and is used for cooling the compressed gas. The flow regulating assembly is connected to an expansion outlet of the centrifugal compression-expansion all-in-one machine 1 and used for regulating the working mode of the system and the flow of the cold-end heat exchange assembly. The cold box is divided into a storage area 10 (small cold quantity) and a quick-freezing area 9 (large cold quantity).
Examples
The embodiment of the application provides a low-temperature refrigerator adopting gas refrigeration, and the working principle diagram of the low-temperature refrigerator takes figure 1 as an example. Fig. 2 and 3 are schematic diagrams of systems with cryogenic heat exchangers in parallel and series, respectively.
As shown in fig. 1, the present application provides a low-temperature refrigerator using gas refrigeration, which mainly comprises a centrifugal compression-expansion all-in-one machine 1, a post-stage cooler 2, a low-temperature regenerator 3, a first flow regulating valve 4, a second flow regulating valve 5, a third flow regulating valve 6, a first low-temperature heat exchanger 7 and a second low-temperature heat exchanger 8. The post-stage cooler 2 is connected with a compression outlet, the hot side of the low-temperature regenerator 3 is connected with the post-stage cooler 2 and an expansion inlet, the cold side of the low-temperature regenerator is connected with the first flow regulating valve 4, the second low-temperature heat exchanger 8 and the compression inlet, the expansion outlet is connected with the second flow regulating valve 5 and the first low-temperature heat exchanger 7, and the third flow regulating valve 6 is connected with the first low-temperature heat exchanger 7 and the second low-temperature heat exchanger 8.
The working process of the application is as follows: the main working mode is that the low-temperature heat exchangers are connected in parallel as shown in fig. 2 (at the moment, the third flow regulating valve 6 is closed), the reheated gas firstly enters the centrifugal compression and expansion all-in-one machine 1 for compression and pressurization, the compressed high-temperature and high-pressure gas enters the post-stage cooler 2 for heat exchange with the outside for cooling, then enters the low-temperature heat regenerator 3 for precooling, the precooled gas enters the centrifugal compression and expansion all-in-one machine 1 for expansion and cooling, then the flow is regulated through the second flow regulating valve 5 and the first flow regulating valve 4, the gas respectively enters the second low-temperature heat exchanger 8 of the preservation area 10 and the first low-temperature heat exchanger 7 of the quick-freezing area 9, the gas enters the low-temperature heat regenerator 3 after cold energy is provided, the normal-. The series mode of the low-temperature heat exchangers is as shown in fig. 3 (at this time, the second flow regulating valve 5 and the first flow regulating valve 4 are closed), and the low-temperature heat exchangers are mainly set for realizing different temperatures of different storage areas, namely, gas enters the centrifugal compression and expansion all-in-one machine 1, is expanded and cooled, then enters the first low-temperature heat exchanger 7 and the second low-temperature heat exchanger 8 in sequence, and provides lower temperature in the quick-freezing area 9.
The centrifugal compression-expansion all-in-one machine 1 is characterized in that a compression impeller, an expansion impeller and a rotor of a high-speed motor are coaxially arranged, the gas expansion and compression processes of the system are simultaneously realized by one machine, the system is simpler, more reliable and more compact, in addition, the system utilizes the expansion impeller to recover work and supply the work to the compressor, the power consumption of the motor is reduced, and the efficiency of the system is improved.
The circulating system of the refrigerator adopts a gas refrigeration component, and different working media can be adopted according to the requirements of temperature and the like, for example, working media such as carbon dioxide, nitrogen and the like can be used. Because the applicable gas range is wide, the applicable temperature range of the system is wide, and the temperature can be from-18 ℃ to-195 ℃ of a common low-temperature refrigerator. Then, the pressure ratio and the expansion ratio of the system can be adjusted by adjusting the rotating speed of the centrifugal compression-expansion integrated machine 1, so that the temperature and the cold quantity of the air at an expansion outlet are adjusted, and then the flow sent into the two low-temperature heat exchangers is adjusted by a flow adjusting valve, so that the reasonable distribution of the cold quantity is realized.
The first low-temperature heat exchanger 7 and the second low-temperature heat exchanger 8 of the low-temperature storeroom of the refrigerator are gas-gas low-temperature heat exchangers, gas and gas heat exchange is adopted, and structures for enhancing heat exchange, such as fins, need to be added on the inner side and the outer side of the pipe at the same time, so that a sufficient heat exchange area is ensured.
Although the present application has been described above with reference to specific embodiments, those skilled in the art will recognize that many changes may be made in the configuration and details of the present application within the principles and scope of the present application. The scope of protection of the application is determined by the appended claims, and all changes that come within the meaning and range of equivalency of the technical features are intended to be embraced therein.
Claims (10)
1. A low temperature refrigerator, characterized in that: including gas refrigeration subassembly, flow control subassembly and the heat exchange assembly who connects gradually, the heat exchange assembly sets up in the cold box, the heat exchange assembly with gas refrigeration subassembly is connected, gas refrigeration subassembly is connected with radiator unit.
2. The cryogenic refrigerator of claim 1, wherein: the gas refrigeration assembly comprises a centrifugal compression and expansion integrated machine, the centrifugal compression and expansion integrated machine is connected with a post-stage cooler, the centrifugal compression and expansion integrated machine is connected with a low-temperature heat regenerator, and the post-stage cooler is connected with the low-temperature heat regenerator.
3. The cryogenic refrigerator of claim 2, wherein: the centrifugal compression-expansion all-in-one machine comprises a compressor, an expander and a high-speed motor, wherein the compressor, the expander and the high-speed motor are coaxially and integrally arranged.
4. The cryogenic refrigerator of claim 3, wherein: the compressor includes compression import and compression export, the expander includes expansion import and expansion export, low temperature regenerator includes hot side and cold side, the cold side with the compression import is connected, the hot side with the expansion import is connected, the hot side is connected with radiator unit, radiator unit is the fan.
5. The cryogenic refrigerator of claim 4, wherein: the flow regulating assembly comprises a first flow regulating valve, a second flow regulating valve and a third flow regulating valve, one end of the first flow regulating valve is connected with the cold side, the other end of the first flow regulating valve is connected with the heat exchange assembly, and the first flow regulating valve is connected with the third flow regulating valve; one end of the second flow regulating valve is connected with the expansion outlet, the other end of the second flow regulating valve is connected with the heat exchange assembly, the second flow regulating valve is connected with the third flow regulating valve, and the third flow regulating valve is connected with the heat exchange assembly.
6. The cryogenic refrigerator of claim 5, wherein: the third flow regulating valve is arranged in the cold box, the heat exchange assembly comprises a first low-temperature heat exchanger and a second low-temperature heat exchanger, the first low-temperature heat exchanger is connected with the expansion outlet, the first low-temperature heat exchanger and the third flow regulating valve are sequentially connected with the second low-temperature heat exchanger, and the second low-temperature heat exchanger is connected with the cold side.
7. The cryogenic refrigerator of claim 6, wherein: the cold box comprises a quick-freezing area and a preservation area, the first low-temperature heat exchanger is arranged in the quick-freezing area, and the second low-temperature heat exchanger is arranged in the preservation area.
8. The cryogenic refrigerator of claim 6, wherein: the first low-temperature heat exchanger is a gas-gas low-temperature heat exchanger and adopts gas and gas for heat exchange, and the second low-temperature heat exchanger is a gas-gas low-temperature heat exchanger and adopts gas and gas for heat exchange.
9. The cryogenic refrigerator of claim 2, wherein: the centrifugal compression-expansion all-in-one machine comprises a rotor, and the rotor is supported by a gas bearing.
10. The low-temperature refrigerator according to any one of claims 1 to 9, wherein: the gas refrigeration component can adopt different working media according to different temperatures, and the working media are carbon dioxide or nitrogen.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110182968.0A CN112944775A (en) | 2021-02-10 | 2021-02-10 | A low temperature refrigerator |
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| CN202110182968.0A CN112944775A (en) | 2021-02-10 | 2021-02-10 | A low temperature refrigerator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113758044A (en) * | 2021-09-22 | 2021-12-07 | 西北农林科技大学 | A low-temperature refrigeration system of a booster-expander integrated machine connected by a direct-drive motor |
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| CN110887302A (en) * | 2019-11-18 | 2020-03-17 | 海信（山东）冰箱有限公司 | a refrigeration device |
| CN212296940U (en) * | 2020-05-14 | 2021-01-05 | 上海朝临动力科技有限公司 | Supercritical carbon dioxide compression and expansion integrated machine |
| CN212339692U (en) * | 2020-05-28 | 2021-01-12 | 福建雪人制冷设备有限公司 | Air refrigerating unit |
| CN215176317U (en) * | 2021-02-10 | 2021-12-14 | 西安交通大学 | Low-temperature refrigerator |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113758044A (en) * | 2021-09-22 | 2021-12-07 | 西北农林科技大学 | A low-temperature refrigeration system of a booster-expander integrated machine connected by a direct-drive motor |
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