CN112696858A - Refrigerating system of low temperature storage - Google Patents
Refrigerating system of low temperature storage Download PDFInfo
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- CN112696858A CN112696858A CN202011560195.7A CN202011560195A CN112696858A CN 112696858 A CN112696858 A CN 112696858A CN 202011560195 A CN202011560195 A CN 202011560195A CN 112696858 A CN112696858 A CN 112696858A
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- 238000005057 refrigeration Methods 0.000 claims abstract description 44
- 239000003507 refrigerant Substances 0.000 claims description 27
- 239000007788 liquid Substances 0.000 claims description 17
- 230000008014 freezing Effects 0.000 claims description 14
- 238000007710 freezing Methods 0.000 claims description 14
- 238000012544 monitoring process Methods 0.000 claims description 8
- 235000013611 frozen food Nutrition 0.000 claims description 6
- 235000012055 fruits and vegetables Nutrition 0.000 claims description 6
- 235000013594 poultry meat Nutrition 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 235000013305 food Nutrition 0.000 description 10
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
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Classifications
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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
- F25D13/00—Stationary devices, e.g. cold-rooms
- F25D13/02—Stationary devices, e.g. cold-rooms with several cooling compartments, e.g. refrigerated locker systems
- F25D13/04—Stationary devices, e.g. cold-rooms with several cooling compartments, e.g. refrigerated locker systems the compartments being at different temperatures
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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
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
- F25B1/10—Compression machines, plants or systems with non-reversible cycle with multi-stage compression
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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
- F25D19/04—Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infrared detectors with more than one refrigeration unit
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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
- F25D29/00—Arrangement or mounting of control or safety devices
Abstract
The invention discloses a refrigerating system for low-temperature storage, which belongs to the technical field of storage management and comprises a first storage room, a second storage room, a single-stage compressor and a two-stage compressor, wherein the single-stage compressor and the two-stage compressor are used for respectively controlling the refrigeration of the first storage room and the second storage room, the refrigerating system of the first storage room comprises a single-stage compressor, a first condenser, a first throttle valve and a first evaporator, the first condenser, the first throttle valve and the first evaporator are sequentially communicated with the single-stage compressor and form a circulation loop, and the temperature regulation and control range of the refrigerating system of the first storage room is 10-25 ℃; the refrigerating system of the second storage room comprises a two-stage compressor, a second condenser, a second throttle valve and a second evaporator, wherein the second condenser, the second throttle valve and the second evaporator are sequentially communicated with the two-stage compressor to form a circulation loop, and the temperature regulation and control range of the refrigerating system of the second storage room is-25 to-60 ℃. The single-stage compressor 2 and the two-stage compressor 6 can work in the optimal pressure state, the large fluctuation of the pressure can not occur, and the service life of the refrigerating system is ensured.
Description
Technical Field
The invention belongs to the technical field of storage management, and particularly relates to a refrigerating system for low-temperature storage.
Background
With the economic development of China, various foods required in the life of people are more and more abundant, the living standard of people is continuously improved, under the background, the requirements of people on the quality and the safety of foods are more and more emphasized, the development and the construction of the low-temperature storage industry of foods by governments are more and more emphasized, and the quality and the freshness of foods which are easy to rot are taken as the most basic appeal of people in society. The method is suitable for the low-temperature storage industry of China to be rapidly developed in recent years.
In the prior art, the refrigeration temperature of a storage room in the low-temperature storage industry is generally determined by the quality and freshness requirements of food stored in the storage room, the general temperature range is 10 to-60 ℃, for example, the first batch of goods in the storage room is fresh vegetables, the temperature is generally controlled to be about zero, the later batch of goods is fresh products needing to be quickly frozen before refrigeration, the temperature needs to be controlled to be below-25 ℃, even below-50 ℃, the temperature difference between the first batch of goods and the second batch of goods is large, if the pressure of a compressor is insufficient, the refrigeration requirement of the latter batch of goods cannot be met, if the pressure of the compressor is large enough, but an ultralow temperature environment is occasionally needed, not only can a large economic cost loss be caused, but also the service life of the compressor can be seriously influenced.
Therefore, the refrigeration system for low-temperature storage is provided, two storage rooms are separated, two different compressors are used for controlling the temperature of the two storage rooms respectively, an enterprise can determine the occupied area of the two storage rooms according to long-term operation conditions, the two storage rooms are reasonably used, the cost is saved, and the economic benefit is improved.
Disclosure of Invention
In view of the deficiencies of the prior art, the present invention provides a refrigeration system for low temperature storage to solve the problems set forth in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: a refrigerating system for low-temperature storage comprises a first storage room, a second storage room, a single-stage compressor and a two-stage compressor, wherein the single-stage compressor and the two-stage compressor are used for respectively performing refrigeration control on the first storage room and the second storage room;
the refrigerating system of the first storage room comprises a single-stage compressor, a first condenser, a first throttle valve and a first evaporator, wherein the first condenser, the first throttle valve and the first evaporator are sequentially communicated with the single-stage compressor and form a circulating loop, a refrigerant continuously circulates and flows in the circulating loop, and the temperature regulation and control range of the refrigerating system of the first storage room is 10-25 ℃;
the refrigerating system of the second storage room comprises a two-stage compressor, a second condenser, a second throttle valve and a second evaporator, wherein the second condenser, the second throttle valve and the second evaporator are sequentially communicated with the two-stage compressor and form a circulating loop, a refrigerant continuously circulates and flows in the circulating loop, and the temperature regulation and control range of the refrigerating system of the second storage room is-25 to-60 ℃;
and the refrigerating system of the first storage room and the refrigerating system of the second storage room are regulated and controlled by the microcontroller.
Further optimizing this technical scheme, the refrigeration temperature of first warehouse specifically includes the following classification according to the in service behavior:
when the fresh-keeping agent is used for keeping fruits and vegetables fresh, the internal temperature of the first storage room is in the range of-5 to 5 ℃;
when the first storage room is used for refrigerating frozen foods, the internal temperature of the first storage room is in the range of-10 to-5 ℃;
when the freezing device is used for refrigerating the frozen aquatic and poultry meat foods, the internal temperature of the first storage room is in the range of minus 20 to minus 10 ℃;
further optimizing the technical scheme, the refrigerating temperature of the second storage room can be adjusted according to the use condition, for example, when the refrigerator is used for quick freezing of fresh products before refrigeration, the internal temperature of the second storage room is below-25 ℃, and the refrigerator is adjusted according to the quick freezing requirement of the fresh products.
The technical scheme is further optimized, the refrigerating process of the refrigerating system in the first storage room is that a single-stage compressor compresses a refrigerant from low-temperature low-pressure gas into high-temperature high-pressure gas, the high-temperature high-pressure gas is condensed into medium-temperature high-pressure liquid through a first condenser, the medium-temperature high-pressure liquid is throttled through a first throttling valve to form low-temperature low-pressure liquid, the low-temperature low-pressure liquid refrigerant is sent into a first evaporator, the heat absorption evaporation is carried out in the first evaporator to form low-temperature low-pressure steam, the low-temperature low-pressure steam is sent into the single-stage compressor again, and the refrigerant continuously circulates and.
Further optimize this technical scheme, equal fixed mounting has temperature sensor in the internal environment between first storage and the second storage, temperature sensor is used for monitoring the internal temperature between first storage and the second storage to transmit monitoring data for microcontroller.
Further optimizing the technical scheme, the type of the microcontroller is STR710FZ2T6, and the microcontroller regulates and controls the refrigeration system to work until the internal temperature between the first storage room and the second storage room reaches the preset value of the system.
The technical scheme is further optimized, the two-stage compressor selects a high-pressure compressor and a low-pressure compressor to be combined, the refrigerant vapor with the pressure of P1 from the second evaporator is compressed to the intermediate pressure P2 by the low-pressure compressor, and then the refrigerant vapor is compressed to the condensing pressure by the high-pressure compressor.
Further optimizing the technical scheme, the two-stage compressor is a single-machine two-stage compressor which is designed by selecting a single-stage piston compressor with 8 cylinders or 4 cylinders, wherein the ratio of the number of the high-pressure stage to the low-pressure stage is 1: 3.
compared with the prior art, the invention provides a refrigerating system for low-temperature storage, which has the following beneficial effects:
the refrigeration system of the low-temperature storage is provided with a first storage room and a second storage room, the temperature regulation and control range of the refrigeration system of the first storage room is 10 to minus 25 ℃, the refrigeration system is used for the fresh-keeping of fruits and vegetables, the refrigeration of frozen foods and the refrigeration of frozen aquatic products and poultry meat foods, and only a single-stage compressor is required to be configured for refrigeration; the temperature regulation and control range of the refrigerating system of the second storage room is-25 to-60 ℃, the refrigerating system is mainly used for quick freezing of fresh products before refrigeration, and the two-stage compressor is configured for ultralow-temperature refrigeration, so that the single-stage compressor and the two-stage compressor both work in the optimal pressure state, large fluctuation of pressure can not occur, the service life of the refrigerating system is ensured, and the use failure rate is reduced.
Drawings
Fig. 1 is a schematic structural diagram of a refrigeration system for low-temperature storage according to the present invention.
In the figure: 1. a first storage room; 2. a single stage compressor; 3. a first condenser; 4. a first evaporator; 5. a second storage room; 6. a two-stage compressor; 7. a second condenser; 8. a second evaporator; 9. a temperature sensor; 10. a microcontroller; 11. a first throttle valve; 12. a second throttle valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
referring to fig. 1, a refrigeration system for low-temperature storage includes a first storage room 1 and a second storage room 5, and a single-stage compressor 2 and a two-stage compressor 6 for respectively controlling the refrigeration of the first storage room 1 and the second storage room 5;
the refrigerating system of the first storage room 1 comprises a single-stage compressor 2, a first condenser 3, a first throttle valve 11 and a first evaporator 4, wherein the first condenser 3, the first throttle valve 11 and the first evaporator 4 are sequentially communicated with the single-stage compressor 2 and form a circulating loop, a refrigerant continuously circulates and flows in the circulating loop, and the temperature regulation and control range of the refrigerating system of the first storage room 1 is 10-25 ℃;
the refrigerating system of the second storage room 5 comprises a two-stage compressor 6, a second condenser 7, a second throttle valve 12 and a second evaporator 8, wherein the second condenser 7, the second throttle valve 12 and the second evaporator 8 are sequentially communicated with the two-stage compressor 6 and form a circulating loop, a refrigerant continuously circulates and flows in the circulating loop, and the temperature regulation and control range of the refrigerating system of the second storage room 5 is-25 to-60 ℃;
the refrigerating system of the first storage room 1 and the refrigerating system of the second storage room 5 are controlled by the microcontroller 10.
Specifically, the refrigeration temperature of the first storage room 1 specifically includes the following categories according to the use condition:
when the fresh-keeping device is used for keeping fruits and vegetables fresh, the internal temperature of the first storage room 1 is in the range of-5 to 5 ℃;
when the first storage room 1 is used for refrigerating frozen foods, the internal temperature of the first storage room 1 is in the range of-10 to-5 ℃;
when the freezing storage cabinet is used for refrigerating the frozen aquatic and poultry meat foods, the internal temperature of the first storage room 1 is in the range of minus 20 to minus 10 ℃;
specifically, the refrigeration temperature of the second storage room 5 can be adjusted according to the use condition, for example, when the refrigerator is used for quick freezing of fresh products before cold storage, the internal temperature of the second storage room 5 is below-25 ℃, and the adjustment is performed according to the quick freezing requirement of the fresh products.
Specifically, the refrigerating process of the refrigerating system in the first storage room 1 is that the single-stage compressor 2 compresses a refrigerant from low-temperature low-pressure gas into high-temperature high-pressure gas, the high-temperature high-pressure gas is condensed into medium-temperature high-pressure liquid through the first condenser 3, the medium-temperature high-pressure liquid is throttled through the first throttle valve 11 to form low-temperature low-pressure liquid, the low-temperature low-pressure liquid refrigerant is sent into the first evaporator 4, the heat absorption and the evaporation are performed in the first evaporator 4 to form low-temperature low-pressure steam, the low-temperature low-pressure steam is sent into the single-stage compressor 2 again, and the refrigerant continuously circulates and.
Specifically, all fixedly mounted has temperature sensor 9 in the internal environment between 1 in the first storage room and 5 in the second storage room, temperature sensor 9 is used for monitoring the internal temperature between 1 in the first storage room and 5 in the second storage room to transmit monitoring data to microcontroller 10.
Specifically, the model of the microcontroller 10 is STR710FZ2T6, and the microcontroller 10 regulates and controls the refrigeration system to work until the internal temperatures of the first storage room 1 and the second storage room 5 reach the preset value of the system.
Specifically, the two-stage compressor 6 selects a high-pressure compressor and a low-pressure compressor to combine, and compresses the refrigerant vapor with the pressure of P1 from the second evaporator 8 to an intermediate pressure P2 by the low-pressure compressor, and then compresses the refrigerant vapor to a condensing pressure by the high-pressure compressor.
Specifically, the two-stage compressor 6 is a single-unit two-stage compressor designed by a single-stage piston compressor with 8 cylinders or 4 cylinders, and the ratio of the number of cylinders of the high-pressure stage to the number of cylinders of the low-pressure stage is 1: 3.
example two:
a refrigerating system for low-temperature storage comprises a first storage room 1, a second storage room 5, a single-stage compressor 2 and a two-stage compressor 6, wherein the single-stage compressor 2 and the two-stage compressor 6 are used for respectively controlling the refrigeration of the first storage room 1 and the refrigeration of the second storage room 5;
the refrigerating system of the first storage room 1 comprises a single-stage compressor 2, a first condenser 3, a first throttle valve 11 and a first evaporator 4, wherein the first condenser 3, the first throttle valve 11 and the first evaporator 4 are sequentially communicated with the single-stage compressor 2 and form a circulating loop, a refrigerant continuously circulates and flows in the circulating loop, and the temperature regulation and control range of the refrigerating system of the first storage room 1 is 10-25 ℃;
the refrigerating system of the second storage room 5 comprises a two-stage compressor 6, a second condenser 7, a second throttle valve 12 and a second evaporator 8, wherein the second condenser 7, the second throttle valve 12 and the second evaporator 8 are sequentially communicated with the two-stage compressor 6 and form a circulating loop, a refrigerant continuously circulates and flows in the circulating loop, and the temperature regulation and control range of the refrigerating system of the second storage room 5 is-25 to-60 ℃;
the refrigerating system of the first storage room 1 and the refrigerating system of the second storage room 5 are controlled by the microcontroller 10.
Specifically, the refrigeration temperature of the first storage room 1 specifically includes the following categories according to the use condition:
when the fresh-keeping device is used for keeping fruits and vegetables fresh, the internal temperature of the first storage room 1 is in the range of-5 to 5 ℃;
when the first storage room 1 is used for refrigerating frozen foods, the internal temperature of the first storage room 1 is in the range of-10 to-5 ℃;
when the freezing storage cabinet is used for refrigerating the frozen aquatic and poultry meat foods, the internal temperature of the first storage room 1 is in the range of minus 20 to minus 10 ℃;
specifically, the refrigeration temperature of the second storage room 5 can be adjusted according to the use condition, for example, when the refrigerator is used for quick freezing of fresh products before cold storage, the internal temperature of the second storage room 5 is below-25 ℃, and the adjustment is performed according to the quick freezing requirement of the fresh products.
Specifically, the refrigerating process of the refrigerating system in the first storage room 1 is that the single-stage compressor 2 compresses a refrigerant from low-temperature low-pressure gas into high-temperature high-pressure gas, the high-temperature high-pressure gas is condensed into medium-temperature high-pressure liquid through the first condenser 3, the medium-temperature high-pressure liquid is throttled through the first throttle valve 11 to form low-temperature low-pressure liquid, the low-temperature low-pressure liquid refrigerant is sent into the first evaporator 4, the heat absorption and the evaporation are performed in the first evaporator 4 to form low-temperature low-pressure steam, the low-temperature low-pressure steam is sent into the single-stage compressor 2 again, and the refrigerant continuously circulates and.
Specifically, all fixedly mounted has temperature sensor 9 in the internal environment between 1 in the first storage room and 5 in the second storage room, temperature sensor 9 is used for monitoring the internal temperature between 1 in the first storage room and 5 in the second storage room to transmit monitoring data to microcontroller 10.
Specifically, the model of the microcontroller 10 is STR710FZ2T6, and the microcontroller 10 regulates and controls the refrigeration system to work until the internal temperatures of the first storage room 1 and the second storage room 5 reach the preset value of the system.
Specifically, the two-stage compressor 6 is a single-unit two-stage compressor designed by a single-stage piston compressor with 8 cylinders or 4 cylinders, and the ratio of the number of cylinders of the high-pressure stage to the number of cylinders of the low-pressure stage is 1: 3, the refrigerant vapor at pressure P1 from the second evaporator 8 is compressed to an intermediate pressure P2 by the low pressure stage cylinder and then compressed to a condensing pressure by the high pressure stage cylinder.
The invention has the beneficial effects that: the refrigeration system of the low-temperature storage is provided with a first storage room 1 and a second storage room 5, the temperature regulation and control range of the refrigeration system of the first storage room 1 is 10-25 ℃, the refrigeration system is used for the fresh-keeping of fruits and vegetables, the refrigeration of frozen foods and the refrigeration of frozen aquatic products and poultry meat foods, and only a single-stage compressor 2 is needed to be configured for refrigeration; the temperature regulation and control range of the refrigerating system of the second storage room 5 is-25 to-60 ℃, the refrigerating system is mainly used for quick freezing of fresh products before refrigeration, and the two-stage compressor 6 is configured for ultralow-temperature refrigeration work, so that the single-stage compressor 2 and the two-stage compressor 6 both work in an optimal pressure state, large pressure fluctuation can not occur, the service life of the refrigerating system is ensured, and the use failure rate is reduced.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The refrigerating system for low-temperature storage is characterized by comprising a first storage room (1), a second storage room (5), a single-stage compressor (2) and a two-stage compressor (6), wherein the single-stage compressor and the two-stage compressor are used for respectively controlling the refrigeration of the first storage room (1) and the refrigeration of the second storage room (5);
the refrigeration system of the first storage room (1) comprises a single-stage compressor (2), a first condenser (3), a first throttle valve (11) and a first evaporator (4), wherein the first condenser (3), the first throttle valve (11) and the first evaporator (4) are sequentially communicated with the single-stage compressor (2) and form a circulation loop, a refrigerant continuously circulates and flows in the circulation loop, and the temperature regulation and control range of the refrigeration system of the first storage room (1) is 10-minus 25 ℃;
the refrigerating system of the second storage room (5) comprises a two-stage compressor (6), a second condenser (7), a second throttle valve (12) and a second evaporator (8), wherein the second condenser (7), the second throttle valve (12) and the second evaporator are sequentially communicated with the two-stage compressor (6) and form a circulating loop, a refrigerant continuously circulates and flows in the circulating loop, and the temperature regulation and control range of the refrigerating system of the second storage room (5) is-25 to-60 ℃;
the refrigerating system of the first storage room (1) and the refrigerating system of the second storage room (5) are controlled by the microcontroller (10).
2. The refrigerating system of a low-temperature storage according to claim 1, wherein the refrigerating temperature of the first storage room (1) specifically comprises the following categories according to the use condition:
when the fresh-keeping device is used for keeping fruits and vegetables fresh, the internal temperature of the first storage room (1) is in the range of-5 to 5 ℃;
when the first storage room (1) is used for refrigerating frozen foods, the internal temperature of the first storage room (1) is in the range of-10 to-5 ℃;
when the freezing storage cabinet is used for refrigerating the frozen aquatic and poultry meat products, the internal temperature of the first storage room (1) is in the range of minus 20 to minus 10 ℃.
3. A refrigerating system for low-temperature storage according to claim 1, wherein the refrigerating temperature of the second storage room (5) can be adjusted according to the use condition, for example, when the refrigerating system is used for quick freezing of fresh products before cold storage, the internal temperature of the second storage room (5) is below-25 ℃, and the refrigerating system is adjusted according to the quick freezing requirement of the fresh products.
4. The refrigerating system of the low-temperature storage according to claim 1, wherein the refrigerating process of the refrigerating system in the first storage room (1) is that a single-stage compressor (2) compresses refrigerant from low-temperature low-pressure gas to high-temperature high-pressure gas, the gas is condensed into medium-temperature high-pressure liquid through a first condenser (3), the liquid is throttled through a first throttle valve (11) to become low-temperature low-pressure liquid, the low-temperature low-pressure liquid refrigerant is sent to a first evaporator (4), the liquid refrigerant absorbs heat in the first evaporator (4) and evaporates to become low-temperature low-pressure steam, the steam is sent to the single-stage compressor (2) again, and the refrigerant continuously circulates in the system to complete the refrigerating cycle and exchange heat with the outside.
5. The refrigerating system of the low-temperature storage according to claim 1, wherein a temperature sensor (9) is fixedly installed in the internal environment of each of the first storage room (1) and the second storage room (5), and the temperature sensor (9) is used for monitoring the internal temperature of the first storage room (1) and the second storage room (5) and transmitting the monitoring data to the microcontroller (10).
6. The refrigeration system of the low-temperature storage according to claim 5, wherein the microcontroller (10) is of the type STR710FZ2T6, and the microcontroller (10) regulates the refrigeration system to work until the internal temperatures of the first storage room (1) and the second storage room (5) reach the preset value of the system.
7. A cryogenic storage refrigeration system according to claim 1, wherein the two stage compressor (6) is a combination of a high pressure compressor and a low pressure compressor, and the refrigerant vapor from the second evaporator (8) at a pressure P1 is compressed to an intermediate pressure P2 by the low pressure compressor and then compressed to a condensing pressure by the high pressure compressor.
8. The refrigerating system for low-temperature storage according to claim 7, wherein the two-stage compressor (6) is a single-stage piston compressor with 8 cylinders or 4 cylinders, and is designed as a single-stage two-stage compressor, and the ratio of the number of cylinders of the high-pressure stage to the number of cylinders of the low-pressure stage is 1: 3.
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| 卢毓俊主编: "《客车空调装置》", 31 December 2007, 中国铁道出版社 * |
| 张祉佑主编: "《制冷原理与制冷设备》", 31 August 1995, 机械工业出版社 * |
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Application publication date: 20210423 |