CN206449926U - A kind of CO of both vapor compression auxiliary supercooling2Trans-critical cycle kind of refrigeration cycle freezer - Google Patents
A kind of CO of both vapor compression auxiliary supercooling2Trans-critical cycle kind of refrigeration cycle freezer Download PDFInfo
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- CN206449926U CN206449926U CN201720090139.9U CN201720090139U CN206449926U CN 206449926 U CN206449926 U CN 206449926U CN 201720090139 U CN201720090139 U CN 201720090139U CN 206449926 U CN206449926 U CN 206449926U
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- refrigeration
- injector
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- freezing
- evaporator
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Abstract
The utility model discloses a kind of CO of both vapor compression auxiliary supercooling2Trans-critical cycle kind of refrigeration cycle freezer.The utility model main circulation loop includes the main recycle compressor outlet being sequentially connected, gas cooler and CO2Cooling evaporator, CO2Cooling evaporator connects freezing injector entrance and refrigeration injector entrance respectively, and freezing is exported with injector and the outlet of refrigeration injector connects gas-liquid separator gas access respectively；Gas-liquid separator gas vent connects main recycle compressor entrance；Gas-liquid separator liquid outlet with refrigeration respectively by connecting freezing with expansion valve with evaporator inlet and refrigeration evaporator inlet；Freezing connects freezing with evaporator outlet and refrigeration with injector and refrigeration injector respectively with evaporator outlet.The utility model is by the evaporation process of auxiliary circulation by major cycle gas CO2Heat be transferred to atmospheric environment or cooling water, realize CO2Supercooling, and then reduce restriction loss, increase refrigerating capacity.
Description
Technical field
The utility model is related to freezer refrigeration system technical field, more particularly to one kind is furnished with and uses low GWP non-co-
Boil the CO of the both vapor compression auxiliary circulation of mix preparation2Trans-critical cycle kind of refrigeration cycle freezer.
Background technology
Climate change is the significant challenge that mankind nowadays society faces, and is damaged the ozone layer and with higher greenhouse effects
By or will be gradually disabled, natural refrigerant turn into current refrigeration industry study hotspot.In numerous natural refrigerants, most generation
Table and competitiveness are CO2。CO2Refrigeration system is the important directions of Refrigeration Technique development.
CO2Cooling cycle system is high due to its operating pressure, and throttling irreversible loss is big, causes circulation substantial deviation reverse
Carnot cycle, CO2Trans critical cycle efficiency is circulated less than conventional refrigerant.
Improve CO2Trans-critical cycle kind of refrigeration cycle efficiency, promotion CO2Refrigeration system application provides a new road, to mitigating temperature
Room effect, realize HCFCs substitute have important economic value and social effect.
Utility model content
The utility model is in order to overcome the deficiencies in the prior art, in CO2It is in parallel a kind of on the basis of transcritical cooling system
It is furnished with and uses the both vapor compression auxiliary circulation of low GWP mixed non-azeotropic refrigerants, uses CO2Cooling evaporator realize major cycle with
The link of auxiliary circulation, reduces the irreversible loss in the outlet temperature of major cycle gas cooler, reduction throttling process, reduction
System high pressure and compressor exhaust temperature, improve refrigerating capacity, and ensure the environmental protection characteristic of system.
The utility model to achieve the above object, is achieved through the following technical solutions, a kind of both vapor compression auxiliary circulation
CO2Transcritical cooling system, the main recycle compressor 1 that main circulation loop includes being sequentially connected is exported, gas cooler 2 and CO2It is cold
But evaporator 6, CO2Cooling evaporation connects the freezing entrance of injector 7 and the entrance of refrigeration injector 8, freezing injection respectively
Device 7 is exported and refrigeration injector 8 exports connection gas-liquid separator 11 gas access respectively；Gas-liquid separator gas vent is connected
The entrance of main recycle compressor 1；The liquid outlet of gas-liquid separator 11 connects freezing with expansion valve by 12 and refrigeration respectively and evaporated
The entrance of device 9 and the refrigeration entrance of evaporator 10；Freezing evaporator 9 is exported and refrigeration evaporator 10 exports connection freezing respectively
With injector 7 and refrigeration injector 8；Auxiliary circulation loop is by the auxiliary circulation compressor 3 being sequentially connected, auxiliary circulation condensation
Device 4, auxiliary circulation throttling arrangement 5 and CO2Cooling evaporator 6 is constituted, and mixed non-azeotropic refrigerant is used in auxiliary circulation.
Beneficial effect：Compared with prior art, by using mixed non-azeotropic refrigerant in auxiliary circulation, auxiliary is utilized
The temperature-changing characteristic of mixed non-azeotropic refrigerant evaporation process and major cycle supercritical CO in circulation2Temperature-changing characteristic realize temperature
Match somebody with somebody, so as to reduce the irreversible loss that heat transfer temperature difference is brought, improve and circulate overall thermodynamics consummating degree, lifting system performance,
By the evaporation process of auxiliary circulation by major cycle gas CO2Heat be transferred to atmospheric environment or cooling water, realize CO2Supercooling,
And then reduce restriction loss, increase refrigerating capacity.And major cycle throttling arrangement replaces choke valve to reclaim one using injector
Divide the pressure potential of expansion process, so as to improve the pressure of inspiration(Pi) of compressor, reduce the input work of compressor, further improve system
The COP of system.
Brief description of the drawings
Fig. 1 is the utility model systemT-sFigure；
Fig. 2 is the utility model structural representation.
In figure：1st, main recycle compressor, 2, gas cooler, 3, auxiliary circulation compressor, 4, auxiliary circulation condenser,
5th, auxiliary circulation throttling arrangement, 6, CO2Cooling evaporator, 7, freezing injector, 8, refrigeration injector, 9, freezing evaporation
Device, 10, refrigeration evaporator, 11, gas-liquid separator, 12, freezing expansion valve, 13, refrigeration expansion valve.
Embodiment
Core of the present utility model is that mixed non-azeotropic refrigerant is used in auxiliary circulation, compared to common pure refrigerant system
Cryogen, can effectively realize the Temperature Matching in subcooling process, so as to reduce the irreversible loss that heat transfer temperature difference is brought, improve circulation
Overall thermodynamics consummating degree, lifting system performance；Compared to the method that expansion work is reclaimed using expanding machine, system knot is simplified
Structure, reduces cost.
As shown in Fig. 2 the main recycle compressor 1 that main circulation loop includes being sequentially connected is exported, gas cooler 2 and CO2
Cooling evaporator 6, CO2Cooling evaporation connects the freezing entrance of injector 7 and the entrance of refrigeration injector 8 respectively, and freezing is with drawing
Emitter 7 is exported and refrigeration injector 8 exports connection gas-liquid separator 11 gas access respectively；Gas-liquid separator gas vent connects
Connect the entrance of main recycle compressor 1；The liquid outlet of gas-liquid separator 11 is used by 12 and refrigeration with the connection freezing of expansion valve 13 respectively
The entrance of evaporator 9 and the refrigeration entrance of evaporator 10；Freezing evaporator 9 is exported and refrigeration evaporator 10 is exported and connected respectively
Freezing injector 7 and refrigeration injector 8；Auxiliary circulation loop is by the auxiliary circulation compressor 3 being sequentially connected, auxiliary circulation
Condenser 4, auxiliary circulation throttling arrangement 5 and CO2Cooling evaporator 6 is constituted, and mixed non-azeotropic refrigerant is used in auxiliary circulation.
Mixed non-azeotropic refrigerant can use R41 (difluoromethane/pentafluoroethane)/R152a（1-1 Difluoroethanes）.
Fig. 1 is the utility model systemT-sIn figure, figure：Circulation a-b-c-d-a is tradition CO2Trans-critical cycle choke valve freezes
Circulation, circulation a-b-c "-d "-a is that had SAPMAC method, i.e. CO2Major cycle, circulation a '-b '-c '-d '-a ' are auxiliary circulation, system
Conventional refrigerant may be selected in cold working medium.Limited by environment temperature（It is assumed to be 35 DEG C）, CO2The outlet temperature of gas cooler compared with
Height, for CO before reduction throttling2Temperature, can be by the evaporation process of auxiliary circulation（d’-a’）By CO in major cycle2Supercooling
Journey（c-c”）Liberated heat is transferred to cooling water or atmospheric environment, realizes CO2Supercooling, and then reduce restriction loss, increase system
Cold.Realize the subcooler referred to as CO of the heat transfer process2Cooling evaporator.
CO2Cooling evaporator 6, which is realized, is coupled major cycle and auxiliary circulation, is novel C O2Trans-critical cycle kind of refrigeration cycle
Key building block.The CO of gas cooler outlet2For supercriticality, larger temperature is produced in subcooling process and is slided
Move, temperature is gradually reduced.For auxiliary circulation side refrigerant, if pure refrigerant, its evaporation process is constant temperature process, and for
Non-azeotropic mixed working medium is alternating temperature process.For pure refrigerant, CO2Outlet side both sides refrigerant temperature difference is smaller, but the temperature of entrance side
Difference is very high, because higher temperatures difference produces very big heat transfer temperature difference irreversible loss during the refrigerant heat exchanger of both sides, reduces and follows
The overall thermodynamics consummating degree of ring, have impact on the systematic function of circulation.And for non-azeotropic mixed working medium, due to non-azeotrope mixing
There is temperature glide in thing, its saturation temperature gradually rises with the progress of evaporation process, with CO in the phase transition process of heat exchanger2's
Temperature change forms good Temperature Matching, reduces the irreversible loss in cooling evaporator heat transfer process, improves circulation
Overall thermodynamics consummating degree, improves circular flow performance.Each constituent element of non-azeotropic mixed working medium selects low GWP refrigerants,
Ensure that the refrigerant environment of auxiliary circulation is friendly.
For CO2Trans-critical cycle kind of refrigeration cycle freezer, because system running pressure is high, conventional throttle valve is replaced using injector
The pressure potential of expansion process can be effectively reclaimed, so as to improve the pressure of inspiration(Pi) of compressor, reduce the input work of compressor, and then
The COP of raising system.
Claims (2)
1. a kind of CO of both vapor compression auxiliary supercooling2Trans-critical cycle kind of refrigeration cycle freezer, it is characterised in that main circulation loop include according to
The main recycle compressor outlet of secondary connection, gas cooler and CO2Cooling evaporator, CO2Cooling evaporator connects freezing and used respectively
Injector entrance and refrigeration injector entrance, freezing is exported with injector and the outlet of refrigeration injector connects gas-liquid point respectively
From device gas access；Gas-liquid separator gas vent connects main recycle compressor entrance；Gas-liquid separator liquid outlet leads to respectively
Cross and refrigeration connects freezing with expansion valve with evaporator inlet and refrigeration evaporator inlet；Freezing evaporator outlet and refrigeration
Freezing is connected respectively with evaporator outlet with injector and refrigeration injector.
2. the CO of both vapor compression auxiliary supercooling according to claim 12Trans-critical cycle kind of refrigeration cycle freezer, it is characterised in that institute
Auxiliary circulation loop is stated by the auxiliary circulation compressor being sequentially connected, auxiliary circulation condenser, auxiliary circulation throttling arrangement and CO2
Cooling evaporator is constituted, and mixed non-azeotropic refrigerant is used in auxiliary circulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720090139.9U CN206449926U (en) | 2017-01-24 | 2017-01-24 | A kind of CO of both vapor compression auxiliary supercooling2Trans-critical cycle kind of refrigeration cycle freezer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720090139.9U CN206449926U (en) | 2017-01-24 | 2017-01-24 | A kind of CO of both vapor compression auxiliary supercooling2Trans-critical cycle kind of refrigeration cycle freezer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206449926U true CN206449926U (en) | 2017-08-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720090139.9U Expired - Fee Related CN206449926U (en) | 2017-01-24 | 2017-01-24 | A kind of CO of both vapor compression auxiliary supercooling2Trans-critical cycle kind of refrigeration cycle freezer |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106766317A (en) * | 2017-01-24 | 2017-05-31 | 天津商业大学 | A kind of CO of both vapor compression auxiliary supercooling2Trans-critical cycle kind of refrigeration cycle freezer |
| CN109724293A (en) * | 2019-02-26 | 2019-05-07 | 天津商业大学 | The CO of the absorption supercooling of Driven by Solar Energy2Trans-critical cycle double-stage compressive refrigerating system |
-
2017
- 2017-01-24 CN CN201720090139.9U patent/CN206449926U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106766317A (en) * | 2017-01-24 | 2017-05-31 | 天津商业大学 | A kind of CO of both vapor compression auxiliary supercooling2Trans-critical cycle kind of refrigeration cycle freezer |
| CN109724293A (en) * | 2019-02-26 | 2019-05-07 | 天津商业大学 | The CO of the absorption supercooling of Driven by Solar Energy2Trans-critical cycle double-stage compressive refrigerating system |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170829 Termination date: 20180124 |
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| CF01 | Termination of patent right due to non-payment of annual fee |