CN108645067A - A kind of Two-stage Compression cooling during rolling three-level automatic cascade refrigeration system - Google Patents
A kind of Two-stage Compression cooling during rolling three-level automatic cascade refrigeration system Download PDFInfo
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- CN108645067A CN108645067A CN201810490407.5A CN201810490407A CN108645067A CN 108645067 A CN108645067 A CN 108645067A CN 201810490407 A CN201810490407 A CN 201810490407A CN 108645067 A CN108645067 A CN 108645067A
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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
- F25B41/40—Fluid line arrangements
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- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The invention discloses a kind of Two-stage Compression cooling during rolling three-level automatic cascade refrigeration systems, high pressure stage compressor connects first-stage condenser, first-stage condenser connects level-one segregator, level-one segregates gaseous phase outlet and connects B-grade condensation access, level-one segregates liquid-phase outlet and connects dual evaporation access, level-one fractional condensation liquid-phase outlet is also connected with mixer, mixer connects high pressure stage compressor, dual evaporation access connects two-stage fractional condensation device, two-stage fractional condensation gaseous phase outlet connects three-level condensation pass, two-stage fractional condensation liquid-phase outlet connects three-level evaporation flow paths, three-level evaporation flow paths outlet connection mixer, three-level condensation pass connects evaporator, evaporator connects low-pressure stage compressor, low-pressure stage compressor connects mixer, ternary non-azeotropic medium is filled in system.The present invention uses ternary mix working medium, system operation to obtain lower evaporation warm area in the working medium warm area of bigger, uses the suction temperature of the cooling high pressure stage compressor of part higher boiling liquid refrigerant throttling in level-one segregator, improves system performance and stability.
Description
Technical field
The present invention relates to field of low-temperature refrigeration more particularly to a kind of Two-stage Compression cooling during rolling three-level automatic cascade refrigeration systems
System.
Background technology
Cryogenic technique is mainly applied in fields such as low-temperature test, biologic medicals, uses mechanical compression type refrigeration modes at present
The refrigeration modes for obtaining low temperature warm area are mainly multi-stage compression refrigeration cycle and cascade refrigeration cycle.In order to make cryogenic refrigerating unit
It is compact-sized, the multistage Auto-cascade Refrigeration System of generally use list compression.
Wherein, three-level automatic cascade refrigeration system uses tertiary non-azeotropic mixed working medium, and -80 DEG C~-120 DEG C left sides can be obtained
The pressure ratio of the evaporating temperature of right warm area, single-stage compressor Auto-cascade Refrigeration System is larger, less efficient.Using traditional three-level
Automatic cascade refrigeration system is difficult to realize lower evaporation warm area (such as：-150℃).Compressor continues in the system of high pressure ratio
Work, reduces the service life of compressor.
Invention content
The purpose of the present invention is design a kind of Two-stage Compression cooling during rolling three-level automatic cascade refrigeration system.
For achieving the above object, the technical scheme is that：A kind of Two-stage Compression cooling during rolling three-level is automatically multiple
The outlet of cascade refrigeration system, including high pressure stage compressor, high pressure stage compressor is connected to first-stage condenser import, first-stage condenser
Outlet is connected to level-one segregator import, and level-one segregator is equipped with level-one fractional condensation gaseous phase outlet, level-one segregates liquid-phase outlet；Including
Secondary condenser, secondary condenser are equipped with B-grade condensation access, dual evaporation access, the B-grade condensation access, dual evaporation
The inlet and outlet direction of access is opposite；The level-one fractional condensation gaseous phase outlet is connected to B-grade condensation lane entrance, the level-one fractional condensation
Liquid-phase outlet is connected to dual evaporation lane entrance by first throttle mechanism, and the level-one fractional condensation liquid-phase outlet also passes through the 4th
Throttle mechanism is connected to mixer, and mixer is connected to high pressure stage compressor import, and the dual evaporation lane exit is connected to
Mixer；The B-grade condensation lane exit is connected to two-stage fractional condensation device import, and two-stage fractional condensation device goes out equipped with two-stage fractional condensation gas phase
Mouth, two-stage fractional condensation liquid-phase outlet；Including three-level condenser, three-level condenser is equipped with three-level condensation pass, three-level evaporation flow paths, institute
It is opposite to state three-level condensation pass, the inlet and outlet direction of three-level evaporation flow paths；It is cold that the two-stage fractional condensation gaseous phase outlet is connected to three-level
Solidifying lane entrance, the two-stage fractional condensation liquid-phase outlet are connected to three-level evaporation flow paths import by second throttle body, and described three
The outlet of grade evaporation flow paths is connected to mixer；Three-level condensation pass outlet by third throttle mechanism be connected to evaporator into
Mouthful, evaporator outlet is connected to mixer by low-pressure stage compressor, and mixer is connected to high pressure stage compressor import；
Ternary non-azeotropic medium is filled in system.
The ternary non-azeotropic medium is by R134a, R23, R50, by 5：3：2 ratios mix.
The beneficial effects of the invention are as follows：
The present invention using more traditional Auto-cascade cycle system boiling point difference bigger ternary mix working medium, can make system operation compared with
The working medium warm area of traditional three-level Auto-cascade cycle system bigger, obtains lower evaporation warm area.It uses simultaneously in the middle part of level-one segregator
The suction temperature for dividing the cooling high pressure stage compressor of higher boiling liquid refrigerant throttling, improves system performance and stability.
Description of the drawings
Fig. 1 is the structural diagram of the present invention.
Specific implementation mode
Below in conjunction with attached drawing, technical scheme in the embodiment of the invention is clearly and completely described.
As shown in Figure 1, a kind of Two-stage Compression cooling during rolling three-level automatic cascade refrigeration system, including high pressure stage compressor 1,
The outlet of high pressure stage compressor 1 is connected to 2 import of first-stage condenser, the outlet of first-stage condenser 2 be connected to level-one segregator 3 into
Mouthful, level-one segregator 3 is equipped with level-one fractional condensation gaseous phase outlet 31, level-one segregates liquid-phase outlet 32；Including secondary condenser 4, two level
Condenser 4 is equipped with B-grade condensation access 41, dual evaporation access 42, the B-grade condensation access 41, dual evaporation access 42
It is opposite to import and export direction；The level-one fractional condensation gaseous phase outlet 31 is connected to 41 import of B-grade condensation access, and the level-one segregates liquid
Mutually outlet 32 is connected to 42 import of dual evaporation access by first throttle mechanism 5, and the level-one fractional condensation liquid-phase outlet 32 is also logical
It crosses the 4th throttle mechanism 12 and is connected to mixer 13, mixer 13 is connected to 1 import of high pressure stage compressor, and the dual evaporation is logical
The outlet of road 42 is connected to mixer 13；The outlet of B-grade condensation access 41 is connected to 6 import of two-stage fractional condensation device, two-stage fractional condensation device
6 are equipped with two-stage fractional condensation gaseous phase outlet 61, two-stage fractional condensation liquid-phase outlet 62；Including three-level condenser 7, three-level condenser 7 is equipped with three
Grade condensation pass 71, three-level evaporation flow paths 72, the three-level condensation pass 71, the inlet and outlet direction phase of three-level evaporation flow paths 72
Instead；The two-stage fractional condensation gaseous phase outlet 61 is connected to 71 import of three-level condensation pass, and the two-stage fractional condensation liquid-phase outlet 62 passes through
Second throttle body 8 is connected to 72 import of three-level evaporation flow paths, and the outlet of three-level evaporation flow paths 72 is connected to mixer 13；Institute
It states the outlet of three-level condensation pass 71 and 10 import of evaporator is connected to by third throttle mechanism 9, the outlet of evaporator 10 passes through low pressure
Grade compressor 11 is connected to mixer 13.Low-pressure stage compressor 11 is set between evaporator 10 and mixer 13, and use is more traditional
The ternary mix working medium of three-level automatic cascade refrigeration system bigger boiling point difference, realizes lower evaporation warm area, increases system
Run warm area.And the compression ratio of every stage compressor is reduced, improve system run all right.The height that level-one segregator 3 segregates out
Boiling point liquid refrigerant divides two-way to throttle, and connects secondary condenser 4 after the throttling of first throttle mechanism 5 all the way, another way is through the 4th
Connection mixer 13 reduces by 1 suction temperature of high pressure stage compressor after throttle mechanism 12 throttles, to reduce high pressure stage compressor
Delivery temperature improves system performance and stability.
A kind of operational process of Two-stage Compression cooling during rolling three-level automatic cascade refrigeration system of the present invention, ternary non-azeotropic
Mixed working fluid enters first-stage condenser 2 after the compression of high pressure stage compressor 1, and wherein higher boiling working medium is condensed in first-stage condenser 2,
And segregated in level-one segregator 3, the higher boiling liquid refrigerant after the fractional condensation of level-one segregator 3 respectively enters first throttle mechanism 5
With the 4th throttle mechanism 12, the middle low boiling point gaseous state mixed working fluid after the fractional condensation of level-one segregator 3 enters secondary condenser 4,
Middle mid-boiling point working medium is condensed in secondary condenser 4, and is segregated in two-stage fractional condensation device 6, the mid-boiling point after the fractional condensation of two-stage fractional condensation device 6
Liquid refrigerant enters second throttle body 8, and the low boiling point gaseous working medium after the fractional condensation of two-stage fractional condensation device 6 enters three-level condenser 7,
Low boiling point gaseous working medium enters third throttle mechanism 9 after the condensation of three-level condenser 7, and low boiling working fluid is through third throttle mechanism 9
Enter evaporator 10 after throttling, low boiling working fluid enters low-pressure stage compressor after the evaporation of evaporator 10, through first throttle mechanism 5
Higher boiling working medium and through the mid-boiling point working medium of second throttle body 8 respectively after secondary condenser 4 and three-level condenser 7 absorb heat
Enter mixer 13 after being mixed with the exhaust of low-pressure stage compressor 11, the higher boiling working medium through the throttling of the 4th throttle mechanism 12 enters mixed
Clutch 13, the mixed working fluid that mixer 13 exports enter high pressure stage compressor 1, complete the operational process of a cycle.
Ternary non-azeotropic medium is filled in system.
The ternary non-azeotropic medium is by R134a, R23, R50, by 5：3：2 ratios mix.Boiling point be respectively-
26.26 DEG C, -82.1 DEG C and -161.5 DEG C.
Described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on the present invention
In embodiment, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, shall fall within the protection scope of the present invention.
Claims (2)
1. a kind of Two-stage Compression cooling during rolling three-level automatic cascade refrigeration system, which is characterized in that high including high pressure stage compressor
The arbitrarily downgrade outlet of compressor is connected to first-stage condenser import, and first-stage condenser outlet is connected to level-one segregator import, level-one
Segregator is equipped with level-one fractional condensation gaseous phase outlet, level-one segregates liquid-phase outlet；Including secondary condenser, secondary condenser is equipped with two level
Condensation pass, dual evaporation access, the B-grade condensation access, the inlet and outlet direction of dual evaporation access are opposite；The level-one
Fractional condensation gaseous phase outlet is connected to B-grade condensation lane entrance, and the level-one fractional condensation liquid-phase outlet is connected to by first throttle mechanism
Dual evaporation lane entrance, the level-one fractional condensation liquid-phase outlet are also connected to mixer by the 4th throttle mechanism, and mixer connects
It is connected to high pressure stage compressor import, the dual evaporation lane exit is connected to mixer；The B-grade condensation lane exit connects
It is connected to two-stage fractional condensation device import, two-stage fractional condensation device is equipped with two-stage fractional condensation gaseous phase outlet, two-stage fractional condensation liquid-phase outlet；It is cold including three-level
Condenser, three-level condenser are equipped with three-level condensation pass, three-level evaporation flow paths, the three-level condensation pass, three-level evaporation flow paths
It is opposite to import and export direction；The two-stage fractional condensation gaseous phase outlet is connected to three-level condensation pass import, and the two-stage fractional condensation liquid phase goes out
Mouth is connected to three-level evaporation flow paths import by second throttle body, and the three-level evaporation flow paths outlet is connected to mixer；Institute
It states the outlet of three-level condensation pass and evaporator is connected to by third throttle mechanism, evaporator outlet passes through low-pressure stage compressor
It is connected to mixer, mixer is connected to high pressure stage compressor import；
Ternary non-azeotropic medium is filled in system.
2. Two-stage Compression cooling during rolling three-level automatic cascade refrigeration system according to claim 1, which is characterized in that described
Ternary non-azeotropic medium is made of the high, normal, basic three kinds of different boiling refrigerants of R134a, R23, R50, by 5：3：2 ratios mix.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810490407.5A CN108645067A (en) | 2018-05-21 | 2018-05-21 | A kind of Two-stage Compression cooling during rolling three-level automatic cascade refrigeration system |
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| CN201810490407.5A CN108645067A (en) | 2018-05-21 | 2018-05-21 | A kind of Two-stage Compression cooling during rolling three-level automatic cascade refrigeration system |
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| CN108645067A true CN108645067A (en) | 2018-10-12 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109405327A (en) * | 2018-12-26 | 2019-03-01 | 上海导向医疗系统有限公司 | Pre-cooler and cold therapy system for cold therapy |
| CN113915874A (en) * | 2021-03-29 | 2022-01-11 | 海信（山东）冰箱有限公司 | A kind of refrigerator |
Citations (4)
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| CN102506534A (en) * | 2011-09-21 | 2012-06-20 | 中国科学院理化技术研究所 | Low-temperature frozen storage tank with primary segregation and separation regenerative mixed refrigerant throttling and refrigerating function |
| CN205316733U (en) * | 2015-12-30 | 2016-06-15 | 深圳市富达冷冻设备有限公司 | Automatic cascade refrigeration system of level four |
| CN205448389U (en) * | 2016-03-16 | 2016-08-10 | 南京林业大学 | Ultra -low temperature is from overlapping formula refrigerating plant |
| CN206420180U (en) * | 2017-01-06 | 2017-08-18 | 福建雪人股份有限公司 | A kind of self-overlay refrigerating device |
-
2018
- 2018-05-21 CN CN201810490407.5A patent/CN108645067A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102506534A (en) * | 2011-09-21 | 2012-06-20 | 中国科学院理化技术研究所 | Low-temperature frozen storage tank with primary segregation and separation regenerative mixed refrigerant throttling and refrigerating function |
| CN205316733U (en) * | 2015-12-30 | 2016-06-15 | 深圳市富达冷冻设备有限公司 | Automatic cascade refrigeration system of level four |
| CN205448389U (en) * | 2016-03-16 | 2016-08-10 | 南京林业大学 | Ultra -low temperature is from overlapping formula refrigerating plant |
| CN206420180U (en) * | 2017-01-06 | 2017-08-18 | 福建雪人股份有限公司 | A kind of self-overlay refrigerating device |
Non-Patent Citations (1)
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109405327A (en) * | 2018-12-26 | 2019-03-01 | 上海导向医疗系统有限公司 | Pre-cooler and cold therapy system for cold therapy |
| CN109405327B (en) * | 2018-12-26 | 2024-02-13 | 上海导向医疗系统有限公司 | Precooling device for cryotherapy and cryotherapy system |
| CN113915874A (en) * | 2021-03-29 | 2022-01-11 | 海信（山东）冰箱有限公司 | A kind of refrigerator |
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Application publication date: 20181012 |