CN102878620B - A kind of two-phase flow refrigeration system - Google Patents

A kind of two-phase flow refrigeration system Download PDF

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Publication number
CN102878620B
CN102878620B CN201210431248.4A CN201210431248A CN102878620B CN 102878620 B CN102878620 B CN 102878620B CN 201210431248 A CN201210431248 A CN 201210431248A CN 102878620 B CN102878620 B CN 102878620B
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fluid reservoir
vaporizer
phase
outfan
compressor
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CN201210431248.4A
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CN102878620A (en
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祝长宇
丁式平
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Beijing Deneng Hengxin Technology Co Ltd
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Beijing Deneng Hengxin Technology Co Ltd
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B2341/00Details of ejectors not being used as compression device; Details of flow restrictors or expansion valves
    • F25B2341/001Ejectors not being used as compression device
    • F25B2341/0012Ejectors with the cooled primary flow at high pressure
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B2400/00General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/23Separators

Abstract

The invention discloses a kind of two-phase flow refrigeration system, be mainly made up of condenser, vaporizer, fluid reservoir, injection throttling arrangement, compressor, two-phase diverter and circuit controling element;Described fluid reservoir is between vaporizer outfan and compressor input;Described two-phase diverter is made up of the airway with return port, and it is positioned at the inside of fluid reservoir, and its outfan is connected to the outfan of fluid reservoir, and input is positioned at the top of fluid reservoir liquid refrigerant liquid level;Described return port is positioned at the bottom of fluid reservoir liquid refrigerant liquid level;The Working-fluid intaking end of described injection throttling arrangement is connected to the outfan of condenser, and the driving fluid arrival end of injection throttling arrangement is connected to fluid reservoir, and its port of export is connected to vaporizer input;So, this system, by increasing two-phase diverter, makes compressor suck a certain proportion of gas flow and fluid flow, carries out gas-liquid two-phase compression, makes circulation inverse circulation close to Kano of whole system, improves refrigerating efficiency.

Description

A kind of two-phase flow refrigeration system
Technical field
The invention belongs to technical field of air conditioner refrigeration, be specifically related to a kind of two-phase flow refrigeration system.
Background technology
At present, kind of refrigeration cycle technology mainly uses the inverse circulation in Kano, cold-producing medium isothermal evaporation, refrigerant vapour determine entropic spueezing, the condensation of cold-producing medium isothermal and refrigerant liquid and determine entropy four cyclic processes of expansion and constitute.Correspondingly, air conditioning system for Regulate Environment temperature is mainly made up of vaporizer, compressor, injection throttling arrangement and four parts of condenser, this air conditioning system can be by isothermal evaporation after the cold-producing medium in vaporizer and high temperature air heat exchange, compressor compresses refrigerant vapour enters isothermal condensation in condenser, the heat that in condensation process, cold-producing medium carries passes to Cryogenic air, and cold-producing medium has expanded in choke valve to be determined entropy and be expanded back in vaporizer repeating above-mentioned circulation.
Inverse Carnot cycle is the circulation of preferable reversible refrigeration, and it is made up of two constant temperature process and two adiabatic process.During circulation, high and low temperature thermal source is constant, refrigeration working medium in condenser and vaporizer and between thermal source without heat transfer temperature difference, refrigeration working medium flows through and does not consider any loss in each equipment, and therefore, inverse Carnot cycle is fluid refrigerating cycle, its coefficient of refrigerating performance is the highest, but cannot realize in engineering.
The loss of current kind of refrigeration cycle is mainly made up of three parts: the loss that the non-constant entropy of (1) compression process causes;(2) condenser and the heat transfer temperature loss of vaporizer;(3) restriction loss of choke valve.In these three loss, on the one hand the reduction of heat transfer temperature loss can increase the coefficient of heat transfer of heat exchanger, on the other hand can increase heat exchange area, and the reduction of this loss is limited.Restriction loss makes the useful energy of cold-producing medium slatterning in vain, uses adequate measures, can reclaim these energy.It is exactly also that existing refrigeration is during isentropic Compression, compressor needs to suck dry low-temp low-pressure saturated vapor and is compressed the state under High Temperature High Pressure, need to consume much electricity, and High Temperature High Pressure saturated vapor is not as two-phase flow state good heat dissipation effect under High Temperature High Pressure, two-phase flow admixture compression process is close to isentropic Compression, therefore find a kind of two-phase flow cooling cycle system, be to greatest extent close to the approach of inverse Kano fluid refrigerating cycle.
Summary of the invention
It is an object of the invention to the shortcoming overcoming prior art to exist, for solving the big problem of energy consumption present in refrigeration system, and a kind of simple in construction is provided, implements easy, the two-phase flow refrigeration system of energy-saving and emission-reduction, make the useful energy recycling that throttling loss and waste is fallen, and make compressor as far as possible close to isentropic Compression during adiabatic compression, make whole system to greatest extent close to inverse Kano fluid refrigerating cycle.
The present invention solves technical problem and adopts the following technical scheme that
A kind of two-phase flow refrigeration system, including condenser, evaporation, compressor, injection throttling arrangement, fluid reservoir, two-phase diverter, airway, catheter and circuit controling element;Described condenser and vaporizer the two mainly realize the device of energy transport;Described fluid reservoir, between vaporizer outfan and compressor input, has three external-connected ports, is an input and two outfans respectively, and its function is to realize gas-liquid separation and the storage of circulation working media;Described two-phase diverter is made up of the airway with return port, and it is positioned at the inside of fluid reservoir, and its outfan is connected to an outfan of fluid reservoir, and input port is positioned at the top of fluid reservoir liquid refrigerant liquid level;Described return port is positioned at the bottom of fluid reservoir liquid refrigerant liquid level;Described vaporizer outfan is connected to the input of fluid reservoir, and its port is positioned at the top of fluid reservoir liquid refrigerant liquid level;Described compressor input is connected to two-phase diverter through the outfan of fluid reservoir;The Working-fluid intaking end of described injection throttling arrangement is connected to the outfan of condenser, the driving fluid arrival end of injection throttling arrangement is connected to another outfan of fluid reservoir, and its port is positioned at the bottom of fluid reservoir liquid refrigerant liquid level, the port of export of injection throttling arrangement is connected to vaporizer input, the effect of injection throttling arrangement includes two aspects, on the one hand the refrigeration working medium making High Temperature High Pressure becomes the refrigeration working medium of low-temp low-pressure by its throttling thus instead of choke valve, on the other hand the liquid refrigerant after making the refrigeration working medium flowed out from vaporizer carry out gas-liquid separation in fluid reservoir is sent into vaporizer through injection throttling arrangement injection and is realized recirculation;So vaporizer, fluid reservoir, two-phase diverter, compressor, condenser, injection throttling arrangement is linked in sequence according to above-listed by pipeline each other, constitutes the loop of a two-phase flow refrigeration system.
The above return port is a hole proportional with the input of two-phase diverter, finally makes compressor suck a certain proportion of gas flow and fluid flow, carries out gas-liquid two-phase compression, finally can be compressed into two-phase saturated vapor;Described return port is to return liquid refrigerant, and also is able to the lubricating oil of refluxing portion compressor.
The above compressor is gas-liquid two-phase flow compressor.
The above liquid storage fills and is connected between vaporizer outfan and compressor input, including three outer connectivity ports, is the outer surface high-pressure-resistant sealed container that is provided with thermal insulation layer, and the function of fluid reservoir is to realize circulating gas-liquid separation and the storage of working media;Fluid reservoir volume size should match with the volume of vaporizer and condenser;Fluid reservoir realizes the mode of gas-liquid separation can select simple gravity settling separation, it is also possible to the refrigeration working medium input at fluid reservoir arranges filter screen or baffle plate, to realize silk screen separation or baffle separation.
The above circuit control part controls circuit logic computing and the equipment run switch of whole device, can realize automatization's start and stop as required.
The present invention is compared with prior art, the design of choke valve is replaced by quoting injection throttling arrangement, the refrigeration working medium flowed out from vaporizer is made to carry out gas-liquid separation and storage in fluid reservoir, gaseous refrigerant is made to enter compressor, the useful energy that some liquid refrigerant utilizes restriction loss to slattern sends into vaporizer recycling through injection throttling arrangement injection, the recycling of refrigerating fluid can be reached, make the most hydraulically full inside vaporizer being evaporated;By increase and the design of two-phase diverter, compressor is made to suck a certain proportion of gas flow and fluid flow, carry out gas-liquid two-phase compression, compressor can be made during adiabatic compression as far as possible close to isentropic Compression, make whole system to greatest extent close to inverse Kano fluid refrigerating cycle, improve refrigerating efficiency, and the simple in construction of this two-phase flow refrigeration system, implement easily and energy-saving and emission-reduction.
Accompanying drawing explanation
Fig. 1 is the structural representation of this system.
In figure: (1) condenser;(2) vaporizer;(3) fluid reservoir;(31) input of fluid reservoir;(32)-(33) outfan of fluid reservoir;(4) injection throttling arrangement;(41) the Working-fluid intaking end of throttling arrangement is sprayed;(42) the driving fluid arrival end of throttling arrangement is sprayed;(43) port of export of throttling arrangement is sprayed.(5) compressor;(6) two-phase diverter;(61) return port;(62) input of two-phase diverter.
Detailed description of the invention:
A kind of two-phase flow refrigeration system shown in Fig. 1, including condenser (1), vaporizer (2), fluid reservoir (3), the input (31) of fluid reservoir, outfan (32)-(33) of fluid reservoir, injection throttling arrangement (4), the Working-fluid intaking end (41) of injection throttling arrangement, the driving fluid arrival end (42) of injection throttling arrangement, the injection port of export (43) of throttling arrangement, compressor (5), two-phase diverter (6), return port (61), the input (62) of two-phase diverter and circuit controling element;Described condenser (1) and vaporizer (2) the two mainly realize the device of energy transport;Described fluid reservoir (3) is positioned between vaporizer (2) outfan and compressor (5) input, has three external-connected ports, is an input (31) and two outfan (32)-(33) respectively;Described two-phase diverter (6) is made up of the airway with return port (61), it is positioned at the inside of fluid reservoir (3), its outfan is connected to the outfan (32) of fluid reservoir (3), and input port (62) is positioned at the top of fluid reservoir (3) liquid refrigerant liquid level;Described return port (61) is positioned at the bottom of fluid reservoir (3) liquid refrigerant liquid level;Described vaporizer (2) outfan is connected to the input (31) of fluid reservoir (3), and its port is positioned at the top of fluid reservoir (3) liquid refrigerant liquid level;Described compressor (5) input outfan (32) through fluid reservoir (3) is connected to two-phase diverter (6);The Working-fluid intaking end (41) of described injection throttling arrangement (4) is connected to the outfan of condenser (1), the driving fluid arrival end (42) of injection throttling arrangement (4) is connected to the outfan (33) of fluid reservoir (3), and its port is positioned at the bottom of fluid reservoir (3) liquid refrigerant liquid level, the port of export (43) of injection throttling arrangement (4) is connected to vaporizer (2) input, so vaporizer (2), fluid reservoir (3), two-phase diverter (6), compressor (5), condenser (1), injection throttling arrangement (4) is linked in sequence according to above-listed by pipeline each other, constitute the loop of a two-phase flow refrigeration system.
nullWhen whole system works,Loop direction as shown in Figure 1,Compressor (5) fills from liquid storage and extracts a large amount of low-pressure gaseous refrigeration working medium by the input (62) of two-phase diverter according to a certain percentage in (3) and extract a small amount of low-pressure liquid refrigeration working medium by return port (61),It is collapsed into the gas-liquid saturated two-phase steam of High Temperature High Pressure,Gas-liquid saturated two-phase steam is admitted in condenser (1),The condensed device of the flow of outside air (1) that condenser fan sucks simultaneously,Take away cold-producing medium liberated heat,High-pressure refrigeration two-phase fluid is made to be condensed into highly pressurised liquid,The highly pressurised liquid working media that condensation is formed enters injection throttling arrangement (4) through the Working-fluid intaking end (41) of injection throttling arrangement,In fluid reservoir (3), isolated liquid intermediate medium enters injection throttling arrangement (4) by the driving fluid arrival end (42) of injection throttling arrangement simultaneously,Now working medium fluid and injection medium fluid enter in mixing chamber,Carry out the equilibrium of speed,Vaporizer (2) is sprayed into through spraying the port of export (43) of throttling arrangement,And evaporate under corresponding low pressure,Draw heat around,Evaporator fan makes air constantly enter between the fin of vaporizer (2) to carry out heat exchange simultaneously,And the air turned cold after heat release is sent to indoor,Gas and the liquid intermediate medium partly not evaporated that evaporation is formed are mutually mixed formation gas-liquid two-phase fluid in flow at high speed,They flow into fluid reservoir (3) through the input (31) of fluid reservoir from vaporizer (2) output,Gas-liquid two-phase flow intermediate working medium separates in fluid reservoir (3) according to respective physical property,So move in circles,Just complete heat transfer process during whole system work.

Claims (2)

1. a two-phase flow refrigeration system, including condenser (1), vaporizer (2), compressor (5), fluid reservoir (3), airway, catheter and circuit controling element, it is characterized in that, also include a two-phase diverter (6) and injection throttling arrangement (4);Described condenser (1) and vaporizer (2) the two mainly realize the device of energy transport;Described fluid reservoir (3) is positioned between vaporizer (2) outfan and compressor (5) input, has three external-connected ports, is an input (31) and two outfans (32 respectively;33), its function is to realize gas-liquid separation and the storage of circulation working media;Described two-phase diverter (6) is made up of the airway with return port (61), it is positioned at the inside of fluid reservoir (3), its outfan is connected to the outfan (32) of fluid reservoir (3), and input port (62) is positioned at the top of fluid reservoir (3) liquid refrigerant liquid level;Described return port (61) is positioned at the bottom of fluid reservoir (3) liquid refrigerant liquid level, return port (61) is a hole proportional with the input (62) of two-phase diverter, compressor (5) is finally made to suck a certain proportion of gas flow and fluid flow, carry out gas-liquid two-phase compression, finally can be compressed into two-phase saturated vapor;Described vaporizer (2) outfan is connected to the input (31) of fluid reservoir (3), and its port is positioned at the top of fluid reservoir (3) liquid refrigerant liquid level;Described compressor (5) input outfan (32) through fluid reservoir (3) is connected to two-phase diverter (6);The Working-fluid intaking end (41) of described injection throttling arrangement (4) is connected to the outfan of condenser (1), the driving fluid arrival end (42) of injection throttling arrangement (4) is connected to the outfan (33) of fluid reservoir (3), and its port is positioned at the bottom of fluid reservoir (3) liquid refrigerant liquid level, the port of export (43) of injection throttling arrangement (4) is connected to vaporizer (2) input, the effect of injection throttling arrangement (4) includes two aspects, on the one hand the refrigeration working medium making High Temperature High Pressure becomes the refrigeration working medium of low-temp low-pressure by its throttling thus instead of choke valve, on the other hand the liquid refrigerant after making the refrigeration working medium flowed out from vaporizer (2) carry out gas-liquid separation in fluid reservoir (3) is sent into vaporizer (2) through injection throttling arrangement (4) injection and is realized recirculation;So vaporizer (2), fluid reservoir (3), two-phase diverter (6), compressor (5), condenser (1), injection throttling arrangement (4) is linked in sequence according to above-listed by pipeline each other, constitutes the loop of a two-phase flow refrigeration system.
A kind of two-phase flow refrigeration system the most according to claim 1, it is characterised in that described compressor (5) is gas-liquid two-phase flow compressor.
CN201210431248.4A 2012-11-02 2012-11-02 A kind of two-phase flow refrigeration system Active CN102878620B (en)

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CN104613687A (en) * 2014-11-17 2015-05-13 苟仲武 Pulse width modulation control method and device for expansion valve
CN109405369A (en) * 2017-08-18 2019-03-01 美的集团股份有限公司 Fluid treating device and temperature control equipment

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WO2012012496A2 (en) * 2010-07-23 2012-01-26 Carrier Corporation Ejector cycle refrigerant separator
WO2012108149A1 (en) * 2011-02-08 2012-08-16 パナソニック株式会社 Gas liquid separator and freeze cycle device
CN102759159A (en) * 2012-08-01 2012-10-31 北京德能恒信科技有限公司 Heat pipe and heat pump composite system
CN202915475U (en) * 2012-11-02 2013-05-01 北京德能恒信科技有限公司 Two-phase flow refrigerating system

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JP2010236706A (en) * 2009-03-30 2010-10-21 Daikin Ind Ltd Air conditioner

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012012496A2 (en) * 2010-07-23 2012-01-26 Carrier Corporation Ejector cycle refrigerant separator
WO2012108149A1 (en) * 2011-02-08 2012-08-16 パナソニック株式会社 Gas liquid separator and freeze cycle device
CN102759159A (en) * 2012-08-01 2012-10-31 北京德能恒信科技有限公司 Heat pipe and heat pump composite system
CN202915475U (en) * 2012-11-02 2013-05-01 北京德能恒信科技有限公司 Two-phase flow refrigerating system

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