CN105546863B - A kind of Auto-cascade cycle list temperature or Duel-temperature refrigeration cycle system using injector synergy - Google Patents
A kind of Auto-cascade cycle list temperature or Duel-temperature refrigeration cycle system using injector synergy Download PDFInfo
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- CN105546863B CN105546863B CN201510931927.1A CN201510931927A CN105546863B CN 105546863 B CN105546863 B CN 105546863B CN 201510931927 A CN201510931927 A CN 201510931927A CN 105546863 B CN105546863 B CN 105546863B
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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
- F25B7/00—Compression machines, plants or systems, with cascade operation, i.e. with two or more circuits, the heat from the condenser of one circuit being absorbed by the evaporator of the next circuit
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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
- F25B41/00—Fluid-circulation arrangements
-
- 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
- F25B2341/00—Details of ejectors not being used as compression device; Details of flow restrictors or expansion valves
- F25B2341/001—Ejectors not being used as compression device
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- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
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Abstract
The invention discloses a kind of Auto-cascade cycle list temperature or Duel-temperature refrigeration cycle system using injector synergy, it is sequentially connected including compressor, condenser and gas-liquid separator entrance, the saturated gas refrigerant rich in low boiling working fluid is cooled to liquid by evaporative condenser caused by gas-liquid separator, is divided into two-way：Wherein main road passes through restricting element successively, cryogenic vaporizer and the secondary inflow entrance of injector enter injector, branch road after being mixed rich in high boiling saturated liquid from gas-liquid separator with entering injector nozzle, injection carrys out the gas refrigerant rich in low boiling working fluid of flash-pot, two fluids is in injector by mixing and discharging injector after boost process, condensed into evaporative condenser and be rich in low boiling component gas from gas-liquid separator, realize that high-temperature refrigeration is changed into overheated gas subsequently into high-temperature evaporator heat absorption, finally enter compressor, realize complete Auto-cascade cycle dual temperature kind of refrigeration cycle；While the circulation effectively can realize automatic cascade dual temperature refrigeration using non-azeotropic mixed working medium, expansion work is reclaimed using injector, improves suction pressure of compressor, effectively improves the performance of cryogenic refrigerating system.
Description
Technical field
The invention belongs to refrigerator and refrigerator refrigeration technology field, and in particular to a kind of Auto-cascade cycle using injector synergy
Single temperature or Duel-temperature refrigeration cycle system.
Technical background
In recent years, with the fast development of new science and technology, the continuous improvement of living standards of the people, therapeutic treatment, food industry,
Many industries such as freezing and refrigeration and all kinds of New Products all propose specific requirement to relatively low temperature environment, there is an urgent need to
The raising and development of Refrigeration Technique.Requirement especially to the low temperature environment less than -40 DEG C is further strong.Realize less than -40 DEG C
The approach of cryogenic refrigeration mainly includes：Single working medium multi-stage compression refrigeration, mixed work medium for throttling refrigeration, cascade refrigeration and runback
Stacked is freezed.
Auto-cascading refrigeration system is that one kind uses non-azeotropic mixed working medium, can be realized by single compressor multistage automatic
Overlapping, so as to obtain the refrigeration system of relatively low cryogenic temperature, therefore there is certain advantage in field of low-temperature refrigeration.But often
It is larger to advise the operational difference of self-cascade refrigeration system system, and is typically realized and throttled by choke valve or capillary, therefore by
The restriction loss that restricting element is brought is larger, causes the efficiency of system can be than relatively low.It can be returned in fact, its throttling process is presence
The expansion work of receipts, if expansion function effectively reclaims, self-cascade refrigeration system systematic function can be effectively improved.In recent years, spray
Emitter because it is simple in construction, cost is cheap, movement-less part, be used for steam compression type refrigerating, heat pump circulating system replace tradition
Restricting element, expansion work is reclaimed, lift the pressure of inspiration(Pi) of compressor so as to reduce the power consumption of compressor and raising in circulation
The displacement of compressor, effectively lift circulatory system performance.However, applied currently for injector on auto-cascading refrigeration system
Method also compare shortage.Therefore, application sprayers of the injector in self-cascade refrigeration system system have positive meaning,
And realize a new direction of less than -40 DEG C cryogenic refrigerations.
The content of the invention
It is an object of the invention to for the deficiencies in the prior art, there is provided a kind of runback using injector synergy
Folded single temperature or Duel-temperature refrigeration cycle system, the system can not only realize the requirement of cryogenic refrigeration, can also be effectively improved system
Refrigerating efficiency.
To realize object above, the technical solution adopted by the present invention is：
A kind of Auto-cascade cycle list temperature or Duel-temperature refrigeration cycle system using injector synergy, including compressor 101, compressor
101 outlet is connected with the import of condenser 102, and the outlet of condenser 102 is connected with the import of gas-liquid separator 103；Gas-liquid separator
103 saturated gas outlet is connected with the condensation side channel entrance of evaporative condenser 107, the condensation wing passage of evaporative condenser 107
Outlet refrigerant is divided into two-way, enters cryogenic vaporizer 105, low temperature after restricting element 106 as direct refrigerant all the way
The outlet of evaporator 105 is connected with 104 2 inflow entrances of injector；Another way is by bypass duct 108 and comes from gas-liquid separator 103
Enter the nozzle of injector 104 after the refrigerant mixing of liquid outlet, after boosting is mixed with the working medium from cryogenic vaporizer 105
Export and discharge through injector 104；The outlet of injector 104 is connected with the evaporation side channel entrance of evaporative condenser 107, the evaporation
The evaporation side channel outlet of condenser 107 is directly connected with the import of compressor 101, forms single warm cooling cycle system, or pass through
High-temperature evaporator 109 is connected with the import of compressor 101, forms Duel-temperature refrigeration cycle system.
The condensation side outlet of evaporative condenser 107 is divided into two-way：Wherein refrigerant main road successively with restricting element 106, low
Warm evaporator 105 is connected with the secondary inflow entrance of injector；Bypass duct 108 is linked to be all the way with the liquid outlet tube of gas-liquid separator 103
Enter the nozzle of injector 104 afterwards, enhance injector working fluid mass flow amount, help to improve injector performance.
The system configures cryogenic vaporizer 105 between restricting element 106 and the Secondary Flow import of injector 104, cold evaporating
High-temperature evaporator 109 is configured between condenser 107 and the import of compressor 101, being capable of dual temperature kind of refrigeration cycle；Meanwhile remove condensation evaporation
High-temperature evaporator 109 between the evaporation side channel outlet of device 107 and the import of compressor 101, single warm kind of refrigeration cycle is realized, is formed
A kind of Auto-cascade cycle list temperature cooling cycle system using injector synergy.
Compared with traditional one-level self-cascade refrigeration system, the present invention is replaced in former auto-cascading refrigeration system using injector
Restricting element, pressure caused by injector so as to be advantageous to the improvement of systematic function, while can be utilized with partially recycled expansion work
(temperature) lifting effect configuration double evaporators realize that dual temperature is freezed；In addition, using road pipe part low-boiling point liquid working medium is drawn
Enter injector nozzle, add the inlet flow rate of injector nozzle, improve injector pressure lifting ratio, be advantageous to compressor work
The reduction of consumption and the raising of systematic energy efficiency ratio.The system is a kind of economic, effective and feasible improving countermeasure, will effectively promote runback
The development of folded cryogenic refrigerating system technology.
Brief description of the drawings
Fig. 1 is the system schematic of embodiment one.
Fig. 2 is pressure-enthalpy diagram (p-h figures) of the cooling cycle system course of work of embodiment one.
Fig. 3 is the system schematic of embodiment two.
Fig. 4 is pressure-enthalpy diagram (p-h figures) of the cooling cycle system course of work of embodiment two.
Embodiment
In order that the objects, technical solutions and advantages of the present invention are more clear and concise, implement below in conjunction with accompanying drawing and two kinds
Example, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only explaining this hair
It is bright, it is not intended to limit the present invention.
Embodiment one
As shown in figure 1, the present embodiment is a kind of Auto-cascade cycle dual temperature refrigeration system using injector synergy, including：Including
Compressor 101, the outlet of compressor 101 are connected with the import of condenser 102, the outlet of condenser 102 and the import of gas-liquid separator 103
It is connected；The saturated gas outlet of gas-liquid separator 103 is connected with the condensation side channel entrance of evaporative condenser 107, evaporative condenser
The evaporation side channel outlet of device 107 is divided into two-way：It is connected all the way through restricting element 106 with the import of cryogenic vaporizer 105, low temperature
The outlet of evaporator 105 is connected with 104 2 inflow entrances of injector；Another way is by bypass duct 108 and carrys out the liquid of gas-liquid separator 103
Body outlet is connected after being linked to be all the way with the nozzle inlet of injector 104；Injector 104 exports the evaporation with evaporative condenser 107
Wing passage import is connected, and evaporative condenser evaporation side outlet is connected with the import of high-temperature evaporator 109, high-temperature evaporator 109
Outlet is connected with the import of compressor 101, form it is a kind of it is complete suitable for cryogenic refrigeration using injector synergy oneself
Overlapping Duel-temperature refrigeration cycle system.
Fig. 2 is pressure-enthalpy diagram (p-h figures) of the cooling cycle system course of work of embodiment one.The specific works of the present invention
Process is：The low area overheat refrigerant (in Fig. 21 point) for carrying out the condensation side channel outlet of evaporative condenser 107 enters high-temperature evaporator
109, absorb heat and be changed into superheated vapor, subsequently into compressor 101, be changed into high pressure superheater gas after compression (2 in Fig. 2
Point), superheated steam turns into gas-liquid two-phase (in Fig. 23 points) after entering the heat release of condenser 102, then real by gas-liquid separator 103
The separation of existing high low boiling component；Saturated gas (in Fig. 25 points) rich in low boiling component condenses in evaporative condenser 107
For subcooled liquid (in Fig. 26 points), then the subcooled liquid is divided into two strands：One is saved as cryogenic fluid by restricting element 106
It is changed into two-phase cryogen (in Fig. 27 points) after stream, is absorbed heat subsequently into cryogenic vaporizer 105, and Temperature of Working is with mass dryness fraction
Increase gradually increase, until saturated gas state (in Fig. 28 points) has carried out refrigeration；Another stock is rich in lower boiling liquid
Working medium converges (in Fig. 29 points) through bypass duct 108 and from gas-liquid separator 103 rich in higher boiling liquid refrigerant, subsequently into
Pressure energy is converted into speed energy (in Fig. 29 points) by the nozzle of injector 104, so as to gas work of the injection from cryogenic vaporizer 105
Matter (in Fig. 28 points), (in Fig. 2 10 points) then are mixed in hybrid chamber, then arranged after diffuser boosts with gas-liquid two-phase state
Go out injector (in Fig. 2 11 points), then the two-phase fluid enters the evaporation side of evaporative condenser 107 and condensation side comes from gas-liquid separation
Device carry out heat exchange heating rich in low boiling component working medium after, gas-liquid two-phase working medium mass dryness fraction increase (in Fig. 2 12 points), subsequently into
After high-temperature evaporator 109 absorbs heat, superheated vapor (in Fig. 21 point) is changed into from two-phase state, realizes high-temperature refrigeration, it is most laggard
Enter compressor 101 to complete entirely to circulate.
Embodiment two
As shown in figure 3, the flow chart for another embodiment of the invention.The present embodiment and the difference of embodiment one exist
In eliminating a kind of evaporation side outlet of evaporative condenser 107 of embodiment and the import of compressor 101 on the basis of embodiment one
Between the high-temperature evaporator 109 that sets.The present embodiment is a kind of Auto-cascade cycle list temperature refrigerator kind of refrigeration cycle using injector synergy
System, including compressor 101, the outlet of compressor 101 are connected with the import of condenser 102, and condenser 102 exports and gas-liquid separation
The import of device 103 is connected；The saturated gas outlet of gas-liquid separator 103 is connected with the condensation side channel entrance of evaporative condenser 107,
The evaporation side channel outlet of evaporative condenser 107 is divided into two-way：It is connected all the way through restricting element 106 with the import of evaporator 105,
The outlet of evaporator 105 is connected with 104 2 inflow entrances of injector；Another way is by bypass duct 108 and carrys out the liquid of gas-liquid separator 103
Body outlet is connected after being unified into all the way with the nozzle inlet of injector 104；Injector 104 exports the evaporation with evaporative condenser 107
Wing passage import is connected, and evaporative condenser 107 evaporates side outlet and is connected with the import of compressor 101, forms a kind of complete spray
The Auto-cascade cycle list temperature refrigerator cooling cycle system of emitter synergy.
Fig. 4 is pressure-enthalpy diagram (p-h figures) of the cooling cycle system course of work of embodiment two.The present invention is with injector
The course of work of superposition type list temperature refrigerator cooling cycle system is：The superheated vapor for carrying out evaporative condenser 107 enters compressor
101, it is changed into high pressure superheater gas (in Fig. 42 points) after compression, superheated steam turns into gas-liquid two after entering the heat release of condenser 102
Phase (in Fig. 43 points), then realizes the separation of high low boiling component by gas-liquid separator 103；Saturation rich in low boiling component
Gas (in Fig. 45 points) is condensed into subcooled liquid (in Fig. 46 points) in evaporative condenser 107, and then the subcooled liquid is divided into two
Stock：One is changed into two-phase cryogen (in Fig. 47 points), Ran Houjin as direct cryogenic fluid after the throttling of restricting element 106
Enter evaporator 105 to absorb heat, and Temperature of Working gradually increases with the increase of mass dryness fraction, until saturated gas state (in Fig. 48 points) is real
Refrigeration is gone；Another stock is rich in lower boiling liquid working substance through bypass duct 108 with being rich in height from gas-liquid separator 103
Boiling point liquid refrigerant converges (in Fig. 49 points), and pressure energy is converted into speed subsequently into the nozzle of injector 104 can (9' in Fig. 4
Point), so as to which injection carrys out the gas working medium (in Fig. 48 points) of flash-pot 105, (in Fig. 4 10 points) then are mixed in hybrid chamber,
Again with gas-liquid two-phase state discharge injector (in Fig. 4 11 points) after diffuser boosts；Then the two-phase fluid enters evaporation
The evaporation side of condenser 107 and condensation side are changed into overheating from gas-liquid separator rich in the heating that exchange heat of low boiling component working medium
Steam (in Fig. 41 point), finally enters compressor 101 and completes entirely to circulate.
Claims (3)
- A kind of 1. Auto-cascade cycle list temperature or Duel-temperature refrigeration cycle system using injector synergy, it is characterised in that：Including compressor (101), the outlet of the compressor (101) is connected with condenser (102) import, condenser (102) outlet and gas-liquid separator (103) import is connected；The saturated gas outlet of gas-liquid separator (103) is connected with the condensation side-entrance of evaporative condenser (107), The refrigerant of the condensation side outlet of evaporative condenser (107) is divided into two-way, passes through restricting element as direct cryogenic fluid all the way (106) cryogenic vaporizer (105) is entered afterwards, cryogenic vaporizer (105) outlet is connected with injector (104) secondary inflow entrance；Separately Enter injector (104) after bypass duct (108) mixes with the refrigerant from gas-liquid separator (103) liquid outlet all the way Nozzle, mix with the working medium from cryogenic vaporizer (105) in the injector (104) and discharged after boosting；Injector (104) goes out Mouth is connected with the evaporation lateral body channel entrance of evaporative condenser (107), the evaporation side channel outlet of the evaporative condenser (107) Directly it is connected with compressor (101) import, forms single warm cooling cycle system, or pass through high-temperature evaporator (109) and compressor (101) import is connected, and forms Duel-temperature refrigeration cycle system.
- 2. a kind of Auto-cascade cycle list temperature or Duel-temperature refrigeration cycle system using injector synergy according to claim 1, its It is characterised by：The condensation side outlet of evaporative condenser (107) is divided into two-way：Wherein refrigerant main road successively with restricting element (106), cryogenic vaporizer (105) is connected with the secondary inflow entrance of injector；Bypass duct (108) and gas-liquid separator (103) liquid Outlet is linked to be enters injector (104) nozzle afterwards all the way, enhances injector working fluid mass flow amount, helps to improve and sprays Emitter performance.
- 3. a kind of Auto-cascade cycle list temperature or Duel-temperature refrigeration cycle system using injector synergy according to claim 1, its It is characterised by：The system configures cryogenic vaporizer (105) between restricting element (106) and injector (104) Secondary Flow import, High-temperature evaporator (109) is configured between evaporative condenser (107) and compressor (101) import, being capable of dual temperature kind of refrigeration cycle；Meanwhile The high-temperature evaporator (109) between the evaporation side channel outlet of condenser/evaporator (107) and compressor (101) import is removed, it is real Now single warm kind of refrigeration cycle, forms a kind of Auto-cascade cycle list temperature cooling cycle system using injector synergy.
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| CN106225319A (en) * | 2016-07-27 | 2016-12-14 | 南京理工大学 | A kind of double evaporating temperatures refrigeration and heat pump air conditioner unit and the method for back-heating type non-azeotropic mixed working medium |
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| CN107192153B (en) * | 2017-07-25 | 2023-07-28 | 广东工业大学 | Double-stage evaporation refrigeration system with ejector |
| CN108204690B (en) * | 2017-10-08 | 2023-04-28 | 江涛 | Single-compressor quasi-cascade air source heat pump system |
| CN108007006B (en) * | 2017-11-07 | 2019-04-16 | 西安交通大学 | A kind of the self-cascade heat pump system and operational mode of multi-mode injection synergy |
| CN108592448A (en) * | 2018-05-22 | 2018-09-28 | 福建工程学院 | Synergy auto-cascading refrigeration system is pressed in a kind of injector |
| CN109307377B (en) * | 2018-09-20 | 2020-05-26 | 西安交通大学 | Two-stage self-cascade refrigeration cycle system and circulation method adopting ejector to increase efficiency |
| WO2020113332A1 (en) * | 2018-12-04 | 2020-06-11 | Her Majesty The Queen In Right Of Canada As Represented By The Minister Of Natural Resources | System and method of mechanical compression refrigeration based on two-phase ejector |
| CN110986414B (en) * | 2019-11-25 | 2020-12-08 | 西安交通大学 | Multi-temperature-zone and large-temperature-span heat pump circulating system adopting ejector for increasing efficiency |
| CN111023363B (en) * | 2019-12-17 | 2021-10-29 | 海信（山东）空调有限公司 | Air conditioner and control method |
| CN111678268B (en) * | 2020-06-19 | 2024-05-28 | 清华大学 | Double-self-cascade quasi-two-stage compression heat pump system |
| CN112393454B (en) * | 2020-07-09 | 2022-06-17 | 香港城市大学深圳研究院 | Double-temperature air source heat pump unit |
| CN113701382B (en) * | 2020-08-31 | 2022-11-01 | 中国科学院理化技术研究所 | Mechanical compression type driven multistage supersonic speed low-temperature refrigeration system |
| CN113175762B (en) * | 2021-04-13 | 2022-08-05 | 西安交通大学 | Synergistic self-cascade refrigeration circulating system of two-phase ejector and control method |
| CN116294319B (en) * | 2023-03-13 | 2024-06-11 | 河南科技大学 | Multistage mixed working medium refrigerating system and circulating method |
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| KR100639104B1 (en) * | 2003-08-01 | 2006-10-27 | 오원길 | Heat pump system of cooling, heating and hot water using binary refrigerating machine with two stage cascade refrigeration |
| CN100434832C (en) * | 2006-11-21 | 2008-11-19 | 西安交通大学 | Self-overlapping refrigerating cycle system with injector |
| CN100529589C (en) * | 2007-10-30 | 2009-08-19 | 西安交通大学 | Small-sized throttle low temperature refrigerator circulating system with injector |
| CN202547173U (en) * | 2012-04-19 | 2012-11-21 | 浙江大学宁波理工学院 | Auto-cascade jet-type refrigerator |
| CN203731731U (en) * | 2014-03-02 | 2014-07-23 | 上海海洋大学 | Energy-saving auto-cascade refrigerating device for ship |
| CN104848574B (en) * | 2015-05-13 | 2017-08-25 | 西安交通大学 | A kind of fractional condensation type Vapor Compression Refrigeration Cycle system of injector synergy |
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