CN105546864B - A kind of Auto-cascade cycle steam compressed refrigerating circulating system of band evaporation subcooler - Google Patents
A kind of Auto-cascade cycle steam compressed refrigerating circulating system of band evaporation subcooler Download PDFInfo
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- CN105546864B CN105546864B CN201610020342.9A CN201610020342A CN105546864B CN 105546864 B CN105546864 B CN 105546864B CN 201610020342 A CN201610020342 A CN 201610020342A CN 105546864 B CN105546864 B CN 105546864B
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- evaporation
- subcooler
- refrigerant
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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
- F25B40/00—Subcoolers, desuperheaters or superheaters
- F25B40/02—Subcoolers
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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
- F25B41/30—Expansion means; Dispositions thereof
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- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Other Air-Conditioning Systems (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
A kind of Auto-cascade cycle steam compressed refrigerating circulating system of band evaporation subcooler, including sequentially connected compressor, condenser and gas-liquid separator, the outlet of gas-liquid separator is divided into two-way, the entrance of saturation refrigerant liquid outlet connection first throttle mechanism all the way, the evaporation side entrance of the outlet connection evaporative condenser of first throttle mechanism；Another way saturation refrigerant gas outlet connects the condensation side entrance of evaporative condenser, the high temperature side entrance of the condensation side outlet connection evaporation subcooler of evaporative condenser, evaporate the entrance of the high temperature side outlet connection second throttle body of subcooler, the outlet of second throttle body is connected with the entrance of evaporator, the evaporation side entrance of the outlet connection evaporation subcooler of evaporator, the evaporation side outlet of the evaporation side outlet and evaporative condenser that evaporate subcooler converges, the air entry of compressor is then attached to, completes Xun Huan；The present invention is effectively improved Auto-cascade cycle steam compressed refrigerating circulating system performance by using an evaporation subcooler in self-cascade refrigeration system system.
Description
Technical field
The invention belongs to refrigeration technology fields, and in particular to a kind of Auto-cascade cycle steam compression type refrigerating of band evaporation subcooler
The circulatory system.
Background technology
Self-cascade refrigeration system system is a kind of refrigeration system for being widely used in cryogenic refrigeration occasion, utilizes non-azeotrope system
The characteristic of cryogen can realize multistage automatic cascade by single compressor, obtain relatively low cryogenic temperature.Compared with overlapping
Formula cooling cycle system has the advantages of cost is relatively low, simple in structure, easy to maintain, so having obtained more and more applications.
In conventional self-cascade refrigeration system system, due to the temperature glide characteristic of non-azeotropic refrigerant, evaporator can there are larger
Temperature glide, with the progress of evaporation process, the mass dryness fraction of refrigerant can gradually increase, and evaporating temperature will increase.And
How the efficiency of self-cascade refrigeration system system has become today of the mainstream of social development in energy-saving and emission-reduction often than relatively low
Improving the efficiency of self-cascade refrigeration system system becomes its important developing direction.
The content of the invention
In order to overcome the above-mentioned problems of the prior art, it is an object of the invention to provide a kind of band evaporation subcoolers
Auto-cascade cycle steam compressed refrigerating circulating system by adding an evaporation subcooler in self-cascade refrigeration system system, increases
The big degree of supercooling into the refrigerant of evaporator before throttling, reduces the mass dryness fraction for entering evaporator after throttling, and then can be with
Identical evaporating temperature is realized in higher evaporating pressure, is reduced the pressure ratio of compressor, is achieved the purpose that lifting system efficiency.
In order to achieve the above object, the present invention adopts the following technical scheme that：
A kind of Auto-cascade cycle steam compressed refrigerating circulating system of band evaporation subcooler, including sequentially connected compressor
101st, condenser 102 and gas-liquid separator 103, the outlet of gas-liquid separator 103 are divided into two-way, and saturation refrigerant liquid goes out all the way
The entrance of mouth connection first throttle mechanism 104, the evaporation side of the outlet connection evaporative condenser 105 of first throttle mechanism 104 enter
Mouthful；Another way saturation refrigerant gas outlet connects the condensation side entrance of evaporative condenser 105, the condensation of evaporative condenser 105
The high temperature side entrance of side outlet connection evaporation subcooler 106, the high temperature side outlet connection second throttle body of evaporation subcooler 106
107 entrance, the outlet of second throttle body 107 are connected with the entrance of evaporator 108, the outlet and evaporation of evaporator 108
The evaporation side entrance of subcooler 106 is connected, the evaporation side of the evaporation side outlet and evaporative condenser 105 of evaporation subcooler 106
Outlet converges, and is then attached to the air entry of compressor 101, completes Xun Huan.
Compared to conventional Auto-cascade cycle steam compressed refrigerating circulating system, the present invention by using a steaming in systems
Subcooler is sent out, increases degree of supercooling of the refrigerant into evaporator before throttling, is reduced after throttling into the dry of evaporator
Degree, and then can realize identical evaporating temperature in higher evaporating pressure, the pressure ratio of compressor is reduced, has reached lifting system energy
The purpose of effect, and the program also has the advantages of simple in structure, of low cost.In short, the system be it is a kind of it is economical, effectively,
Feasible improving countermeasure can effectively improve the performance of Auto-cascade cycle steam compressed refrigerating circulating system, promote Auto-cascade cycle vapour pressure
The development of compressed refrigerating circulating system power-saving technology.
Description of the drawings
Fig. 1 is a kind of Auto-cascade cycle steam compressed refrigerating circulating system schematic diagram of band evaporation subcooler of the present invention.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and detailed description.
As shown in Figure 1, the present invention is a kind of Auto-cascade cycle steam compressed refrigerating circulating system of band evaporation subcooler, including
Sequentially connected compressor 101, condenser 102 and gas-liquid separator 103；The outlet of gas-liquid separator 103 is divided into two-way, all the way
The entrance of saturation refrigerant liquid outlet connection first throttle mechanism 104, the outlet connection evaporative condenser of first throttle mechanism 104
The evaporation side entrance of device 105；Another way saturation refrigerant gas outlet connects the condensation side entrance of evaporative condenser 105, evaporation
The high temperature side outlet of subcooler 106 is evaporated in the high temperature side entrance of the condensation side outlet connection evaporation subcooler 106 of condenser 105
The entrance of second throttle body 107 is connected, the outlet of second throttle body 107 is connected with the entrance of evaporator 108, evaporator
108 outlet is connected with evaporating the evaporation side entrance of subcooler 106, and the evaporation side outlet for evaporating subcooler 106 is cold with evaporating
The evaporation side outlet of condenser 105 converges, and is then attached to the air entry of compressor 101, completes Xun Huan.
As shown in Figure 1, a kind of work of the Auto-cascade cycle steam compressed refrigerating circulating system of band evaporation subcooler of the present invention
Process is：The superheated refrigerant steam (in figure at 2 points) that compressor 101 exports becomes two into 102 partial condensation of condenser
Phase refrigerant fluid (in figure at 3 points), which is divided into two-way in gas-liquid separator 103：Saturation system all the way
Cryogen liquid (in figure at 5 points), which enters throttling in first throttle mechanism 104, becomes two phase refrigerant fluid (in figure at 6 points), should
Two phase refrigerant fluid, which goes successively to evaporation in evaporative condenser 105, becomes saturation or superheated refrigerant steam (in figure at 7 points)；
Another way saturation refrigerant vapour (in figure at 4 points) is into the condensation of evaporative condenser 105 as saturation or supercooling refrigerant liquid
(in figure at 8 points), the saturation or supercooling refrigerant liquid, which enter in evaporation subcooler 106, continues supercooling as supercooling refrigerant liquid
Body (in figure at 8x points), the supercooling refrigerant liquid are throttled as two phase refrigerant fluid in second throttle body 107 (in figure
At 9 points), which enters 108 vaporized in part of evaporator as two phase refrigerant fluid (10x points in figure
Place), which, which enters evaporation in evaporation subcooler, becomes saturation or superheated refrigerant steam (in figure at 10 points),
The saturation or superheated refrigerant steam (in figure at 7 points) that the saturation or superheated refrigerant steam are exported with evaporative condenser 105 are converged
Saturation or superheated refrigerant steam (in figure at 1 point) are synthesized, eventually passes back to compressor, completes Xun Huan.
Claims (1)
1. a kind of Auto-cascade cycle steam compressed refrigerating circulating system of band evaporation subcooler, including sequentially connected compressor
(101), condenser (102) and gas-liquid separator (103)；It is characterized in that：The outlet of gas-liquid separator (103) is divided into two-way,
The entrance of saturation refrigerant liquid outlet connection first throttle mechanism (104) all the way, the outlet connection of first throttle mechanism (104)
The evaporation side entrance of evaporative condenser (105)；The condensation of another way saturation refrigerant gas outlet connection evaporative condenser (105)
Side entrance, the high temperature side entrance of the condensation side outlet connection evaporation subcooler (106) of evaporative condenser (105), evaporates subcooler
(106) entrance of high temperature side outlet connection second throttle body (107), the outlet connection evaporation of second throttle body (107)
The entrance of device (108), the evaporation side entrance of the outlet connection evaporation subcooler (106) of evaporator (108), evaporates subcooler
(106) the evaporation side outlet of evaporation side outlet and evaporative condenser (105) converges, and is then attached to the suction of compressor (101)
Gas port completes Xun Huan；
Degree of supercooling of the refrigerant before throttling into evaporator is increased using an evaporation subcooler (106) in systems,
Enter the mass dryness fraction of evaporator after reducing throttling, and then can realize identical evaporating temperature in higher evaporating pressure, reduce pressure
The pressure ratio of contracting machine has achieved the purpose that lifting system efficiency；
In subcooler is evaporated, the evaporation that will come from the two phase refrigerant fluid of evaporator (108) is further as low-temperature receiver
Refrigerant liquid of the supercooling from evaporative condenser (105) condensation side outlet, increases the degree of supercooling before its throttling, after reducing throttling
Mass dryness fraction；
The course of work of the Auto-cascade cycle steam compressed refrigerating circulating system of band evaporation subcooler is：Compressor (101) goes out
The superheated refrigerant steam of mouth enters condenser (102) partial condensation as two phase refrigerant fluid, the two-phase refrigerant flow
Body is divided into two-way in gas-liquid separator (103)：All the way saturation refrigerant liquid enter in first throttle mechanism (104) throttling into
For two phase refrigerant fluid, which, which goes successively to evaporation in evaporative condenser (105), becomes saturation or overheat
Refrigerant vapour；Another way saturation refrigerant vapour enters evaporative condenser (105) condensation as saturation or supercooling refrigerant liquid
Body, the saturation or supercooling refrigerant liquid, which enter in evaporation subcooler (106), continues supercooling as supercooling refrigerant liquid, the mistake
The throttling in second throttle body (107) of cold refrigerant liquid becomes two phase refrigerant fluid, which enters
Evaporator (108) vaporized in part becomes two phase refrigerant fluid, which, which enters in evaporation subcooler, evaporates
As saturation or superheated refrigerant steam, the saturation of the saturation or superheated refrigerant steam and evaporative condenser (105) outlet or
Superheated refrigerant steam is merged into as saturation or superheated refrigerant steam, eventually passes back to compressor, completes Xun Huan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610020342.9A CN105546864B (en) | 2016-01-13 | 2016-01-13 | A kind of Auto-cascade cycle steam compressed refrigerating circulating system of band evaporation subcooler |
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| CN201610020342.9A CN105546864B (en) | 2016-01-13 | 2016-01-13 | A kind of Auto-cascade cycle steam compressed refrigerating circulating system of band evaporation subcooler |
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| CN105546864A CN105546864A (en) | 2016-05-04 |
| CN105546864B true CN105546864B (en) | 2018-05-18 |
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| CN109737621B (en) * | 2018-12-05 | 2021-03-19 | 江苏白雪电器股份有限公司 | Self-cascade refrigeration system |
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| CN115218560A (en) * | 2021-04-15 | 2022-10-21 | 芜湖美智空调设备有限公司 | Refrigerant circulation system and air conditioner |
| CN114034160B (en) * | 2021-12-14 | 2023-03-24 | 郑州大学 | Novel two-stage rectification self-cascade natural gas liquefaction system and control method thereof |
| CN114165858A (en) * | 2021-12-21 | 2022-03-11 | 珠海格力电器股份有限公司 | Air conditioning system and control method thereof |
| CN114893923B (en) * | 2022-04-16 | 2023-05-26 | 郑州大学 | Automatic overlapping system based on active regulation and control of concentration of working medium components and control method |
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