CN113340030A - System for preventing pipeline freezing and blocking by adopting stepped hot fluorine defrosting for ultralow-temperature multistage self-cascade refrigeration cryogenic unit - Google Patents
System for preventing pipeline freezing and blocking by adopting stepped hot fluorine defrosting for ultralow-temperature multistage self-cascade refrigeration cryogenic unit Download PDFInfo
- Publication number
- CN113340030A CN113340030A CN202110774702.5A CN202110774702A CN113340030A CN 113340030 A CN113340030 A CN 113340030A CN 202110774702 A CN202110774702 A CN 202110774702A CN 113340030 A CN113340030 A CN 113340030A
- Authority
- CN
- China
- Prior art keywords
- pipeline
- heat exchanger
- stage
- stage heat
- input end
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005057 refrigeration Methods 0.000 title claims abstract description 79
- 238000010257 thawing Methods 0.000 title claims abstract description 77
- 229910052731 fluorine Inorganic materials 0.000 title claims abstract description 24
- 239000011737 fluorine Substances 0.000 title claims abstract description 24
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 238000007710 freezing Methods 0.000 title claims abstract description 23
- 230000008014 freezing Effects 0.000 title claims abstract description 23
- 230000000903 blocking effect Effects 0.000 title claims description 5
- 239000007788 liquid Substances 0.000 claims description 48
- 238000001816 cooling Methods 0.000 description 10
- 230000009286 beneficial effect Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000003507 refrigerant Substances 0.000 description 5
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 238000009835 boiling Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- 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
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
- F25B47/022—Defrosting cycles hot gas defrosting
-
- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
-
- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
-
- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/37—Capillary tubes
-
- 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
-
- 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
- F25B2347/00—Details for preventing or removing deposits or corrosion
- F25B2347/02—Details of defrosting cycles
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Defrosting Systems (AREA)
Abstract
本发明公开了超低温多级自复叠制冷深冷单元采用阶梯式热氟除霜防管路冻结堵塞系统，压缩机输出端与除霜热交换器第一管路输入端连接，除霜热交换器第一管路输出端通过冷凝器与多级自复叠级联制冷单元第一通道输入端连接，多级自复叠级联制冷单元第一通道输出端与制冷电磁阀连接，制冷电磁阀与蒸发器输入端连接，蒸发器输出端与多级自复叠级联制冷单元第二通道输入端连接，多级自复叠级联制冷单元第二通道输出端与压缩机输入端连接；多级自复叠级联制冷单元化霜管路通过除霜热交换器与第一化霜电磁阀连接，第一化霜电磁阀与蒸发器输入端连接；压缩机输出端还与第二化霜电磁阀连接，第二化霜电磁阀与蒸发器输入端连接。
The invention discloses an ultra-low temperature multi-stage self-cascading refrigeration cryogenic unit which adopts a stepped thermal fluorine defrosting system to prevent pipeline freezing and clogging. The compressor output end is connected to the first pipeline input end of the defrosting heat exchanger, and the defrosting heat exchange The output end of the first pipeline of the condenser is connected to the input end of the first channel of the multi-stage self-cascading cascade refrigeration unit through the condenser, and the output end of the first channel of the multi-stage self-cascading cascade refrigeration unit is connected to the refrigeration solenoid valve, and the refrigeration solenoid valve is connected to the input end of the evaporator, the output end of the evaporator is connected to the input end of the second channel of the multi-stage self-cascading cascade refrigeration unit, and the output end of the second channel of the multi-stage self-cascading cascade refrigeration unit is connected to the input end of the compressor; The defrosting pipeline of the cascaded cascade refrigeration unit is connected with the first defrosting solenoid valve through the defrosting heat exchanger, and the first defrosting solenoid valve is connected with the input end of the evaporator; the output end of the compressor is also connected with the second defrosting solenoid valve. The solenoid valve is connected, and the second defrosting solenoid valve is connected with the input end of the evaporator.
Description
Technical Field
The invention relates to the technical field of natural cascade type ultralow temperature deep cooling of a refrigerating system, in particular to a system for preventing pipelines from being frozen and blocked by adopting a stepped hot fluorine defrosting mode in an ultralow temperature multistage self-cascade type refrigerating deep cooling unit.
Background
The existing ultra-low temperature multi-stage self-cascade refrigeration technology adopts multi-component mixed working medium as a refrigerant, the components are physically mixed by refrigerants with the boiling points different by 40-80 ℃, so that the three-phase points of the components have high and low values, when an evaporator is refrigerated and the temperature of the evaporator is far lower than that of one or more components in the mixed working medium, hot fluorine defrosting is adopted at the time, high-temperature high-pressure gas compressed by a compressor contains the components of all the components and a small amount of compressor lubricating oil, when the high-temperature high-pressure gas is conveyed into the evaporator through a defrosting pipeline for hot fluorine defrosting, as the evaporator is in an extremely cold state far lower than the three-phase points of some components and freezing oil, some components and the compressor lubricating oil are frozen and solidified after entering the evaporator, the pipeline of a system is blocked, and the extremely cold temperature of the evaporator is pushed to a multi-stage self-cascade refrigeration unit, the existing solution is to add an auxiliary electric heater or adopt a hydrocarbon refrigerant with a lower triple point as a member to fuse components with a high triple point or refrigeration oil to reduce the freezing points of the components, but the electric power is increased and the system has certain danger, the hydrocarbon belongs to flammable and explosive substances, and once the leakage reaches a certain upper limit of combustion and explosion, casualties or property loss can be brought.
Disclosure of Invention
Therefore, the invention provides a system for preventing pipelines from being blocked by freezing by adopting a stepped hot fluorine defrosting mode in an ultralow temperature multistage self-overlapping refrigeration and deep cooling unit, so as to solve the problems in the prior art.
In order to achieve the above purpose, the invention provides the following technical scheme:
according to the first aspect of the invention, the ultra-low temperature multi-stage self-cascade refrigeration cryogenic unit adopts a system for preventing pipelines from being blocked by freezing in a stepped hot fluorine defrosting mode, and the system comprises a compressor, a defrosting heat exchanger, a condenser, a multi-stage self-cascade refrigeration unit, a refrigeration electromagnetic valve, an evaporator, a first defrosting electromagnetic valve and a second defrosting electromagnetic valve;
the output end of the compressor is connected with the input end of a first pipeline of the defrosting heat exchanger, the output end of the first pipeline of the defrosting heat exchanger is connected with the input end of a first channel of the multi-stage self-cascade refrigeration unit through the condenser, the output end of the first channel of the multi-stage self-cascade refrigeration unit is connected with the refrigeration electromagnetic valve through a pipeline, the refrigeration electromagnetic valve is connected with the input end of the evaporator through a pipeline, the output end of the evaporator is connected with the input end of a second channel of the multi-stage self-cascade refrigeration unit through a pipeline, and the output end of the second channel of the multi-stage self-cascade refrigeration unit is connected with the input end of the compressor through a pipeline;
a defrosting pipeline of the multi-stage self-cascade refrigeration unit is connected with the first defrosting electromagnetic valve through the defrosting heat exchanger, and the first defrosting electromagnetic valve is connected with the input end of the evaporator through a pipeline;
the output end of the compressor is also connected with the second defrosting electromagnetic valve, and the second defrosting electromagnetic valve is connected with the input end of the evaporator through a pipeline.
Further, the refrigeration device also comprises a first throttling device, and the first throttling device is arranged on a pipeline between the refrigeration electromagnetic valve and the input end of the evaporator.
And a sensor is arranged on a pipeline between the output end of the evaporator and the input end of the second channel of the multi-stage self-cascade refrigeration unit.
Further, the multi-stage self-cascade refrigeration unit comprises a first-stage heat exchanger, a second-stage heat exchanger, a third-stage heat exchanger, a fourth-stage heat exchanger, a fifth-stage heat exchanger, a first gas-liquid separator, a second gas-liquid separator, a third gas-liquid separator and a second throttling device; the first-stage heat exchanger, the second-stage heat exchanger, the third-stage heat exchanger, the fourth-stage heat exchanger and the fifth-stage heat exchanger are all provided with a first pipeline and a second pipeline;
the first pipeline input end of the first-stage heat exchanger is connected with the condenser;
the output end of the first pipeline of the first-stage heat exchanger is connected with the inlet of the first gas-liquid separator, the gas outlet of the first gas-liquid separator is connected with the input end of the first pipeline of the second-stage heat exchanger through a pipeline, and the liquid outlet of the first gas-liquid separator is connected with the input end of the second pipeline of the second-stage heat exchanger through the second throttling device;
the output end of the first pipeline of the second-stage heat exchanger is connected with the inlet of the second gas-liquid separator, the gas outlet of the second gas-liquid separator is connected with the input end of the first pipeline of the third-stage heat exchanger through a pipeline, and the liquid outlet of the second gas-liquid separator is connected with the input end of the second pipeline of the third-stage heat exchanger through the second throttling device;
the output end of the first pipeline of the third-stage heat exchanger is connected with the inlet of the third gas-liquid separator, the gas outlet of the third gas-liquid separator is connected with the input end of the first pipeline of the fourth-stage heat exchanger through a pipeline, the liquid outlet of the third gas-liquid separator is connected with the input end of the second pipeline of the fourth-stage heat exchanger through the second throttling device, and the third gas-liquid separator is also provided with a bypass defrosting pipeline;
the output end of the first pipeline of the fourth-stage heat exchanger is connected with the input end of the first pipeline of the fifth-stage heat exchanger;
the output end of a first pipeline of the fifth-stage heat exchanger is connected with the refrigeration electromagnetic valve, and the output end of the evaporator is connected with the input end of the fourth-stage heat exchanger through a pipeline.
Further, the output end of the first pipeline of the fifth-stage heat exchanger is also connected with the input end of the second pipeline of the fifth-stage heat exchanger through a pipeline.
Further, the second throttling device is arranged on a pipeline between the output end of the first pipeline of the fifth-stage heat exchanger and the input end of the second pipeline of the fifth-stage heat exchanger.
Further, the first-stage heat exchanger, the second-stage heat exchanger, the third-stage heat exchanger, the fourth-stage heat exchanger and the fifth-stage heat exchanger are all double-pipe heat exchangers or plate-type heat exchangers.
Further, the defrosting heat exchanger is a double pipe heat exchanger or a plate heat exchanger.
Further, the condenser is a water-cooling type condenser or an air-cooling type condenser.
Further, the first throttling device and the second throttling device are both capillary tubes or throttling valves.
The invention has the following advantages: according to the ultralow-temperature multistage self-cascade refrigeration cryogenic unit, a stepped hot fluorine defrosting system is adopted to prevent pipelines from being blocked by freezing, and stepped defrosting control is adopted, so that freezing and blocking of the ultralow-temperature pipelines can be effectively avoided, and effective, safe and reliable operation of the multistage self-cascade refrigeration system is guaranteed.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.
Fig. 1 is a structural diagram of a system for preventing a pipeline from being blocked by freezing in an ultra-low temperature multi-stage self-cascade refrigeration and deep-cooling unit adopting a stepped thermal fluorine defrosting mode according to some embodiments of the present invention.
Fig. 2 is a structural diagram of a multistage self-cascade refrigeration unit of a system in which an ultralow-temperature multistage self-cascade refrigeration cryogenic unit provided by some embodiments of the present invention employs a stepped thermal fluorine defrosting to prevent a pipeline from being blocked by freezing.
In the figure: 1. the system comprises a compressor, 2, a defrosting heat exchanger, 3, a condenser, 4, a first defrosting electromagnetic valve, 5, a second defrosting electromagnetic valve, 6, a multi-stage self-cascade refrigeration unit, 7, a refrigeration electromagnetic valve, 8, a first throttling device, 9, a control unit, 10, an evaporator, 11, a sensor, 12, a first-stage heat exchanger, 13, a second-stage heat exchanger, 14, a third-stage heat exchanger, 15, a fourth-stage heat exchanger, 16, a fifth-stage heat exchanger, 17, a first gas-liquid separator, 18, a second gas-liquid separator, 19, a third gas-liquid separator, 20, a second throttling device, 21, a first pipeline, 21 and a second pipeline.
Detailed Description
The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. 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.
As shown in fig. 1 to 2, the system for preventing pipeline freezing and blocking in an ultra-low temperature multistage self-cascade refrigeration and deep-cooling unit in the first aspect of the present invention adopts a stepped hot fluorine defrosting mode, and includes a compressor 1, a defrosting heat exchanger 2, a condenser 3, a multistage self-cascade refrigeration unit 6, a refrigeration solenoid valve 7, an evaporator 10, a first defrosting solenoid valve 4, and a second defrosting solenoid valve 5; the output end of the compressor 1 is connected with the input end of a first pipeline 21 of the defrosting heat exchanger 2, the output end of the first pipeline 21 of the defrosting heat exchanger 2 is connected with the input end of a first channel of a multi-stage self-cascade refrigeration unit 6 through a condenser 3, the output end of the first channel of the multi-stage self-cascade refrigeration unit 6 is connected with a refrigeration electromagnetic valve 7 through a pipeline, the refrigeration electromagnetic valve 7 is connected with the input end of an evaporator 10 through a pipeline, the output end of the evaporator 10 is connected with the input end of a second channel of the multi-stage self-cascade refrigeration unit 6 through a pipeline, and the output end of the second channel of the self-cascade refrigeration unit 6 is connected with the input end of the compressor 1 through a pipeline; a defrosting pipeline of the multi-stage self-cascade refrigeration unit 6 is connected with a first defrosting electromagnetic valve 4 through a defrosting heat exchanger 2, and the first defrosting electromagnetic valve 4 is connected with the input end of an evaporator 10 through a pipeline; the output end of the compressor 1 is also connected with a second defrosting electromagnetic valve 5, and the second defrosting electromagnetic valve 5 is connected with the input end of the evaporator 10 through a pipeline.
In the above embodiments, it should be noted that, in this embodiment, multiple environmentally-friendly and non-flammable refrigerants are used as components, and according to the physicochemical properties of the refrigerant components, the logical control of the control unit is used to perform step-type defrosting, during defrosting, a component with a lower triple point at the later stage in the multi-stage self-cascade refrigeration unit is used to perform primary heat exchange with the high-pressure and high-temperature exhaust line of the compressor through the heat exchange line and then send the component to the evaporator for defrosting, and when the return air temperature of the evaporator detected by the evaporator loop temperature sensor is higher than a certain component with the highest triple point in the multi-component mixed working medium, the defrosting pipeline is switched to perform the conventional hot-fluorine defrosting mode, that is, the high-pressure and high-temperature exhaust line of the compressor is bypassed, and the high-temperature and high-pressure gas is sent to the evaporator for defrosting; in addition, auxiliary electric heating can be added to key parts.
The technical effects achieved by the above embodiment are as follows: the cryogenic multistage self-cascade refrigeration copious cooling unit of ultra-low temperature through this embodiment adopts cascaded hot fluorine defrosting to prevent that the pipeline from freezing the system of jam, adopts cascaded defrosting control, can effectually avoid the ultra-low temperature pipeline to freeze the jam, and the effective safe reliable operation of guarantee multistage self-cascade refrigeration system.
Optionally, as shown in fig. 1 to 2, in some embodiments, a first throttling device 8 is further included, and the first throttling device 8 is disposed on a pipeline between the refrigeration solenoid valve 7 and the input end of the evaporator 10.
In the above alternative embodiment, it should be noted that the first throttling device 8 is any component capable of playing a throttling role.
The beneficial effects of the above alternative embodiment are: the first throttle means 8 performs a good throttling function.
Optionally, as shown in fig. 1 to 2, in some embodiments, a sensor 11 is further included, and the sensor 11 is disposed on a pipe between an output end of the evaporator 10 and an input end of the second channel of the multi-stage self-cascade refrigeration unit 6.
In the above alternative embodiment, it should be noted that the device further includes a control unit 9, and the control unit 9 is configured to implement logic control of the entire device.
The beneficial effects of the above alternative embodiment are: by providing the sensor 11, temperature monitoring at the outlet of the evaporator 10 is achieved.
Alternatively, as shown in fig. 1-2, in some embodiments, the multi-stage self-cascade refrigeration unit 6 includes a first-stage heat exchanger 12, a second-stage heat exchanger 13, a third-stage heat exchanger 14, a fourth-stage heat exchanger 15, a fifth-stage heat exchanger 16, a first gas-liquid separator 17, a second gas-liquid separator 18, a third gas-liquid separator 19, and a second throttling device 20; the first-stage heat exchanger 12, the second-stage heat exchanger 13, the third-stage heat exchanger 14, the fourth-stage heat exchanger 15 and the fifth-stage heat exchanger 16 are all provided with a first pipeline 21 and a second pipeline 22; the input end of a first pipeline 21 of the first-stage heat exchanger 12 is connected with the condenser 3; the output end of the first pipeline 21 of the first-stage heat exchanger 12 is connected with the inlet of the first gas-liquid separator 17, the gas outlet of the first gas-liquid separator 17 is connected with the input end of the first pipeline 21 of the second-stage heat exchanger 13 through a pipeline, and the liquid outlet of the first gas-liquid separator 17 is connected with the input end of the second pipeline 22 of the second-stage heat exchanger 13 through the second throttling device 20; the output end of the first pipeline 21 of the second-stage heat exchanger 13 is connected with the inlet of the second gas-liquid separator 18, the gas outlet of the second gas-liquid separator 18 is connected with the input end of the first pipeline 21 of the third-stage heat exchanger 14 through a pipeline, and the liquid outlet of the second gas-liquid separator 18 is connected with the input end of the second pipeline 22 of the third-stage heat exchanger 14 through a second throttling device 20; the output end of the first pipeline 21 of the third-stage heat exchanger 14 is connected with the inlet of the third gas-liquid separator 19, the gas outlet of the third gas-liquid separator 19 is connected with the input end of the first pipeline 21 of the fourth-stage heat exchanger 15 through a pipeline, the liquid outlet of the third gas-liquid separator 19 is connected with the input end of the second pipeline 22 of the fourth-stage heat exchanger 15 through a second throttling device 20, and the third gas-liquid separator 19 is further provided with a bypass defrosting pipeline; the output end of the first pipeline 21 of the fourth stage heat exchanger 15 is connected with the input end of the first pipeline 21 of the fifth stage heat exchanger 16; the output end of the first pipeline 21 of the fifth-stage heat exchanger 16 is connected with the refrigeration electromagnetic valve 7, and the output end of the evaporator 10 is connected with the input end of the fourth-stage heat exchanger 15 through a pipeline.
In the above alternative embodiment, it should be noted that the above embodiment only shows the self-cascade refrigeration unit 6 composed of five heat exchangers, and in addition, the number of the heat exchangers can be set to any other number according to actual requirements.
The beneficial effects of the above alternative embodiment are: through the self-cascade refrigeration unit 6 of the embodiment, the refrigeration effects of gradual condensation and automatic cascade are effectively realized.
Optionally, as shown in fig. 1-2, in some embodiments, the output of the first conduit 21 of the fifth stage heat exchanger 16 is further connected by a conduit to the input of the second conduit 22 of the fifth stage heat exchanger 16.
Optionally, as shown in fig. 1 to 2, in some embodiments, a second throttling device 20 is provided on the pipeline between the output of the first pipeline 21 of the fifth stage heat exchanger 16 and the input of the second pipeline 22 of the fifth stage heat exchanger 16.
In the above alternative embodiment, it should be noted that the second throttling device 20 is any component capable of playing a throttling role.
The beneficial effects of the above alternative embodiment are: the second throttle means 20 performs a good throttling function.
Alternatively, as shown in fig. 1 to 2, in some embodiments, the first stage heat exchanger 12, the second stage heat exchanger 13, the third stage heat exchanger 14, the fourth stage heat exchanger 15, and the fifth stage heat exchanger 16 are all double pipe heat exchangers or plate heat exchangers.
The beneficial effects of the above alternative embodiment are: through the arrangement, a good heat exchange effect is achieved.
Alternatively, as shown in fig. 1-2, in some embodiments, the defrost heat exchanger 2 is a tube-in-tube heat exchanger or a plate-in-plate heat exchanger.
The beneficial effects of the above alternative embodiment are: through the arrangement, a good heat exchange effect is achieved.
Alternatively, as shown in fig. 1 to 2, in some embodiments, the condenser 3 is a water-cooling type condenser or an air-cooling type condenser.
In the above alternative embodiment, it should be noted that the condenser 3 may also be another type of condenser.
Alternatively, as shown in fig. 1-2, in some embodiments, the first throttling device 8 and the second throttling device 20 are both capillary tubes or throttle valves.
In the above alternative embodiment, it should be noted that the first throttling device 8 and the second throttling device 20 may be other types of throttling devices.
Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
In the present specification, the terms "upper", "lower", "left", "right", "middle", and the like are used for clarity of description, and are not intended to limit the scope of the present invention, and changes or modifications in the relative relationship may be made without substantial changes in the technical content.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110774702.5A CN113340030A (en) | 2021-07-08 | 2021-07-08 | System for preventing pipeline freezing and blocking by adopting stepped hot fluorine defrosting for ultralow-temperature multistage self-cascade refrigeration cryogenic unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110774702.5A CN113340030A (en) | 2021-07-08 | 2021-07-08 | System for preventing pipeline freezing and blocking by adopting stepped hot fluorine defrosting for ultralow-temperature multistage self-cascade refrigeration cryogenic unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113340030A true CN113340030A (en) | 2021-09-03 |
Family
ID=77483136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110774702.5A Pending CN113340030A (en) | 2021-07-08 | 2021-07-08 | System for preventing pipeline freezing and blocking by adopting stepped hot fluorine defrosting for ultralow-temperature multistage self-cascade refrigeration cryogenic unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113340030A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1380965A (en) * | 2000-05-30 | 2002-11-20 | Igc珀利克尔德系统公司 | Low temp. Refrigeration system |
| CN1910411A (en) * | 2004-01-07 | 2007-02-07 | 新明和工业株式会社 | Ultralow temperature refrigerator, refrigerating system, and vacuum apparatus |
| CN105605819A (en) * | 2016-03-16 | 2016-05-25 | 南京林业大学 | Ultralow-temperature auto-cascade type refrigerating device and refrigerating method |
| JP2020165581A (en) * | 2019-03-29 | 2020-10-08 | 三菱重工サーマルシステムズ株式会社 | Non-azeotropic refrigerant circuit |
| CN111879026A (en) * | 2020-07-22 | 2020-11-03 | 新沂凯瑞克制冷科技有限公司 | Ultralow-temperature self-cascade refrigeration system for preparing liquid nitrogen temperature zone lower than minus 180 DEG C |
| CN212205122U (en) * | 2020-04-07 | 2020-12-22 | 广州协义自动化科技有限公司 | Oil-free compressor of ultralow-temperature water vapor capture pump system |
| CN112178966A (en) * | 2020-09-29 | 2021-01-05 | 新沂凯瑞克制冷科技有限公司 | Self-adaptive variable flow control multistage self-cascade refrigeration system |
| CN215724329U (en) * | 2021-07-08 | 2022-02-01 | 新沂凯瑞克制冷科技有限公司 | Stepped hot fluorine defrosting system adopted by ultralow-temperature multistage self-cascade refrigeration and deep-cooling unit |
-
2021
- 2021-07-08 CN CN202110774702.5A patent/CN113340030A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1380965A (en) * | 2000-05-30 | 2002-11-20 | Igc珀利克尔德系统公司 | Low temp. Refrigeration system |
| CN1910411A (en) * | 2004-01-07 | 2007-02-07 | 新明和工业株式会社 | Ultralow temperature refrigerator, refrigerating system, and vacuum apparatus |
| CN105605819A (en) * | 2016-03-16 | 2016-05-25 | 南京林业大学 | Ultralow-temperature auto-cascade type refrigerating device and refrigerating method |
| JP2020165581A (en) * | 2019-03-29 | 2020-10-08 | 三菱重工サーマルシステムズ株式会社 | Non-azeotropic refrigerant circuit |
| CN212205122U (en) * | 2020-04-07 | 2020-12-22 | 广州协义自动化科技有限公司 | Oil-free compressor of ultralow-temperature water vapor capture pump system |
| CN111879026A (en) * | 2020-07-22 | 2020-11-03 | 新沂凯瑞克制冷科技有限公司 | Ultralow-temperature self-cascade refrigeration system for preparing liquid nitrogen temperature zone lower than minus 180 DEG C |
| CN112178966A (en) * | 2020-09-29 | 2021-01-05 | 新沂凯瑞克制冷科技有限公司 | Self-adaptive variable flow control multistage self-cascade refrigeration system |
| CN215724329U (en) * | 2021-07-08 | 2022-02-01 | 新沂凯瑞克制冷科技有限公司 | Stepped hot fluorine defrosting system adopted by ultralow-temperature multistage self-cascade refrigeration and deep-cooling unit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN211739588U (en) | Air conditioner capable of improving heat exchange performance | |
| EP1139039B1 (en) | Economizer circuit enhancement | |
| CN110057124A (en) | A kind of part superposition type quotient is super to use CO2Trans-critical cycle double-stage compressive refrigerating system | |
| WO1998006983A1 (en) | Air conditioner | |
| CN104246393A (en) | Refrigeration cycle system | |
| CN108458511B (en) | Direct contact condensation refrigerating system with hot gas defrosting function | |
| JP2005077088A (en) | Condensation machine | |
| WO2005024313A1 (en) | Freezer device | |
| CN113614470B (en) | Air conditioning equipment | |
| CN115038917A (en) | Air conditioner | |
| CN109489289B (en) | Cascade air conditioning system | |
| JP2010014351A (en) | Refrigerating air conditioner | |
| CN215724329U (en) | Stepped hot fluorine defrosting system adopted by ultralow-temperature multistage self-cascade refrigeration and deep-cooling unit | |
| WO2013146415A1 (en) | Heat pump-type heating device | |
| TWI564524B (en) | Refrigeration cycle | |
| CN1134627C (en) | Double-tube type heat exchanger and refrigerating machine using the heat exchanger | |
| WO2021036115A1 (en) | Refrigeration system | |
| CN113340030A (en) | System for preventing pipeline freezing and blocking by adopting stepped hot fluorine defrosting for ultralow-temperature multistage self-cascade refrigeration cryogenic unit | |
| CN112963979A (en) | Overlapping heat pump system capable of realizing work cycle conversion | |
| WO2023010768A1 (en) | Air conditioning system | |
| CN108007010B (en) | Heat pump system | |
| CN110108056A (en) | The regulating device of refrigeration system | |
| CN110701812A (en) | Supercritical CO is striden in ejector pressure boost subcooling expander coupling2System and application | |
| CN114198946B (en) | Serpentine tube microchannel heat exchanger, air conditioner | |
| CN110440472A (en) | A kind of cooling cycle system of partial phase change |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210903 |