CN105466061A - Two-stage compression refrigerator system and working method thereof - Google Patents
Two-stage compression refrigerator system and working method thereof Download PDFInfo
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- CN105466061A CN105466061A CN201511018201.5A CN201511018201A CN105466061A CN 105466061 A CN105466061 A CN 105466061A CN 201511018201 A CN201511018201 A CN 201511018201A CN 105466061 A CN105466061 A CN 105466061A
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- capillary
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- 230000006835 compression Effects 0.000 title claims abstract description 26
- 238000007906 compression Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000003507 refrigerant Substances 0.000 claims description 20
- 239000007788 liquid Substances 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 3
- 230000008676 import Effects 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 238000005057 refrigeration Methods 0.000 abstract description 10
- 238000012546 transfer Methods 0.000 abstract description 6
- 230000002427 irreversible effect Effects 0.000 abstract description 4
- 230000008929 regeneration Effects 0.000 abstract 9
- 238000011069 regeneration method Methods 0.000 abstract 9
- 230000007547 defect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 12
- 238000001704 evaporation Methods 0.000 description 7
- 238000013461 design Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 239000011555 saturated liquid Substances 0.000 description 2
- 238000009834 vaporization Methods 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- VEMKTZHHVJILDY-UHFFFAOYSA-N resmethrin Chemical compound CC1(C)C(C=C(C)C)C1C(=O)OCC1=COC(CC=2C=CC=CC=2)=C1 VEMKTZHHVJILDY-UHFFFAOYSA-N 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
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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
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
- F25B1/10—Compression machines, plants or systems with non-reversible cycle with multi-stage compression
-
- 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
- F25B41/37—Capillary tubes
-
- 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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D19/00—Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infrared detectors
- F25D19/003—Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infrared detectors with respect to movable containers
Abstract
The invention discloses a two-stage compression refrigerator system and a working method thereof. The system comprises a two-stage compressor, a condenser, first-stage and second-stage heat regeneration capillary tubes and first-stage and second-stage evaporators. An outlet of the compressor is connected with an inlet of the condenser. An outlet of the condenser is connected with capillary tube section inlets of the first-stage heat regeneration capillary tube and the second-stage heat regeneration capillary tube. Capillary tube outlets of the first-stage heat regeneration capillary tube and the second-stage heat regeneration capillary tube are connected with inlets of the corresponding evaporators. Outlets of the evaporators are connected with heat regeneration section inlets of the corresponding heat regeneration capillary tubes. Finally, heat regeneration section outlets of the first-stage and the second-stage heat regeneration capillary tubes are connected with first-stage and second-stage inlets of the compressor respectively. The invention further discloses a working method of the two-stage compression refrigerator system. The defects of an existing refrigerator circulation system are overcome, the irreversible loss caused by the too large heat transfer temperature difference is reduced, and the refrigeration efficiency of a refrigerator, particularly in a refrigeration chamber is improved.
Description
Technical field
The present invention relates to the refrigerator circulatory system, be specifically related to a kind of two stages of compression refrigerator system and method for work thereof.
Background technology
Along with China's rapid development of economy, domestic refrigerator has become one of household electrical appliances of each family indispensability, and annual production is huge, and the proportion of power consumption electricity of being in is also particularly evident.Meanwhile, along with improving constantly of people's living standard, the expansion of the area of residence, the utilization rate of large-capacity refrigerator is more and more higher, and increasing market is large, and energy consumption is also corresponding to be increased.This also makes the power saving of domestic refrigerator become extremely important.
Traditional refrigerator circulation is respectively single evaporator circulation, the circulation of tandem double evaporators and alternative expression vaporization cycle three class.
The refrigerator of single evaporator circulation and the circulation of tandem double evaporators, all only have single closed circuit, according to the evaporating temperature that the temperature requirements of refrigerating chamber sets, refrigerating chamber then uses the methods such as air-cooled or mixed non-azeotropic refrigerant temperature glide to freeze.There is following problem in them: single stage compress pressure ratio is large, and refrigerating efficiency is low; Leakage, the vibration & noise grade of compressor all maintain higher grade; The heat transfer temperature difference of refrigerating chamber is large, and the excessive temperature difference also can cause a large amount of wastes of energy; Single evaporator circulating air cooling needs extra power consumption; Use mixed non-azeotropic refrigerant to need to drop into research and development, and rush filling at cold-producing medium, when especially supplementing, there is operation easier.
For alternative expression vaporization cycle refrigerator, be circularly set two evaporimeters parallel with one another, and be provided with reversal valve to control cold-producing medium in bifurcation, each only by a wherein path.Although such refrigerator freely can switch in refrigeration and freezing two kinds of kind of refrigeration cycle, substantially effectively can overcome single evaporator and to circulate and tandem double evaporators cycle refrigerator refrigerating chamber heat transfer temperature difference causes greatly the shortcoming of a large amount of irreversible loss.But the operating mode of its compressor is severe, and compressor can only design a kind of declared working condition and need frequently to switch under two kinds of operating modes, and the crossfire phenomenon in handoff procedure also can cause compressor to cut down gas in a short time, degradation harmful effect under refrigeration.This circulation simultaneously also cannot meet the demand that user cools simultaneously.
Can see that existing refrigerator system all exists self shortcoming and problem.Due to refrigerator system multi-chamber temperature, make simple circulation easily cause a large amount of energy losses, and the limited space of refrigerator system wish that system is simple as much as possible.This group contradiction also exists in refrigerator system design always.
Summary of the invention
In order to overcome above-mentioned prior art Problems existing, the object of the present invention is to provide a kind of two stages of compression refrigerator system and method for work thereof, the present invention overcomes the weak point of current refrigerator system, improve refrigeration for refrigerator efficiency especially at the heating efficiency of refrigerating chamber, reduce the excessive irreversible loss caused of heat transfer temperature difference.
In order to achieve the above object, the present invention adopts following technical scheme:
A kind of two stages of compression refrigerator system, comprise compressor 101, described compressor 101 exports and is connected with condenser 102 entrance, condenser 102 exports and is connected with secondary reheat capillary 104 capillary tube segment entrance with one-level reheat capillary 103 capillary tube segment entrance respectively, the outlet of one-level reheat capillary 103 capillary tube segment is connected with one-level evaporimeter 105 entrance, one-level evaporimeter 105 exports and is connected with one-level reheat capillary 103 backheat section entrance, and 1. the outlet of one-level reheat capillary 103 backheat section is connected with the one-level entrance of compressor 101; Equally, the outlet of secondary reheat capillary 104 capillary tube segment is connected with secondary evaporimeter 106 entrance, secondary evaporimeter 106 exports and is connected with secondary reheat capillary 104 backheat section entrance, and secondary reheat capillary 104 exports and is 2. connected with the secondary inlet of compressor 101.
The method of work of two stages of compression refrigerator system described above, the cold-producing medium of compressor 101 first-stage cylinder I import department is the superheated steam of being discharged by one-level reheat capillary 103 backheat section, after one stage of compression, the superheated steam of discharging with secondary reheat capillary 104 backheat section mixes, after abundant mixing, input compressor 101 secondary cylinder II carries out two-stage compression, obtains the refrigerant vapour of HTHP; Then this refrigerant vapour is by condenser 102, condenses into liquid state; After shunting, enter the capillary tube segment of one-level reheat capillary 103 and secondary reheat capillary 104 and one-level evaporimeter 105 and secondary evaporimeter 106 respectively, carry out that backheat is excessively cold, capillary expands and evaporator heat exchange, and then the regenerator section passing into one-level reheat capillary 103 and secondary reheat capillary 104 is carried out overheated, so far completes once complete circulation.
Compared to the prior art comparatively, the present invention possesses following advantage:
1, the present invention is by utilizing two stages of compression, formulates the evaporating temperature of coupling refrigerator two Room room temperature respectively.Original single loop system, make present two-stage compression circulation system into, effectively reduce the heat transfer temperature difference of refrigerating chamber gas and evaporimeter inner refrigerant, the Energy Efficiency Ratio of system is greatly improved, in same nominal refrigerating capacity situation, save energy consumption.
2, present system adopts double-stage compressor, more easily realizes slowing down of torque ripple, the vibrations of effective reduction system and noise.
3, after one stage of compression, gas, through the cooling of secondary medium temperature and medium pressure gas, effectively can control delivery temperature.
4, because double flash evaporation system relatively independent, synchronous refrigeration is achieved.
Accompanying drawing explanation
Figure 1 shows that conventional refrigerator system and device schematic diagram.
Figure 2 shows that the circulation pressure-enthalpy diagram (p – h schemes) of conventional refrigerator system work process.
Figure 3 shows that refrigerator system device schematic diagram of the present invention.
Figure 4 shows that the circulation pressure-enthalpy diagram (p – h schemes) of the refrigerator system course of work of the present invention
Figure 5 shows that the present invention use independently capillary and regenerator to replace at different levels in reheat capillary after system and device schematic diagram.
Figure 6 shows that the present invention uses two of series connection compressors to replace the system and device schematic diagram after two-stage compressor.
Figure 7 shows that the present invention use two-stage throttling method to replace one-level throttling in parallel after system and device schematic diagram.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
As shown in Figure 1, conventional refrigerator system, the outlet of compressor 11 is connected with the entrance of condenser 12; The outlet of condenser 12 is connected with the entrance of regenerator 13; The outlet of regenerator 13 is connected with the entrance of choke valve 14; The outlet of choke valve 14 is connected with the entrance of evaporimeter 15; The entrance that the outlet of evaporimeter 15 is reverse with regenerator 13 is connected; The reverse outlet of regenerator 13 is connected with the entrance of compressor 11.
As shown in Figure 2, for the circulation pressure-enthalpy diagram (p – h schemes) of conventional refrigerator system work process, the course of work of the system of its signal is: first carry out at overheated (in figure 01 place) through regenerator 13 from the low-temperature low-pressure refrigerant gas (in figure 00) of evaporimeter 15, then enter compressor 11 to be compressed rear boosting intensification and become high temperature and high pressure steam (in figure 02 ' some place), high temperature and high pressure steam becomes the saturated liquid (in figure 03 place) of high pressure release heat in condenser 12 after; Saturated liquid enters in regenerator 13 again, carries out cold, becomes the supercool gas (in figure 04 place) of high pressure.Supercool gas enters choke valve 14 reducing pressure by regulating flow and becomes low temperature two phase cold-producing medium (in figure 05 place), and two phase cold-producing mediums (in figure 05 place) absorb heat in evaporimeter 15 becomes low-temperature low-pressure refrigerant gas (in figure 00 place).Wherein obtain the air of cold at evaporimeter, a part is directly freezed to refrigerating chamber Tibetan thing, and another part enters refrigerating chamber by air door and freezes.
In figure, two straight lines are respectively refrigerating chamber design temperature (top) and refrigerating chamber design temperature (below), therefore as can be seen from the figure, the temperature difference of refrigerant evaporating temperature and refrigerating chamber is very large, can cause very large irreversible loss, thus cause a large amount of wastes of energy.
As shown in Figure 3, the present invention is a kind of two stages of compression refrigerator circulatory system, comprise compressor 101, described compressor 101 exports and is connected with condenser 102 entrance, condenser 102 exports and is connected with secondary reheat capillary 104 capillary tube segment entrance with one-level reheat capillary 103 capillary tube segment entrance respectively, the outlet of one-level reheat capillary 103 capillary tube segment is connected with one-level evaporimeter 105 entrance, one-level evaporimeter 105 exports and is connected with one-level reheat capillary 103 backheat section entrance, and 1. the outlet of one-level reheat capillary 103 backheat section is connected with the one-level entrance of compressor 101; Equally, the outlet of secondary reheat capillary 104 capillary tube segment is connected with secondary evaporimeter 106 entrance, secondary evaporimeter 106 exports and is connected with secondary reheat capillary 104 backheat section entrance, and secondary reheat capillary 104 exports and is 2. connected with the secondary inlet of compressor 101.
The refrigerant gas that compressor inner primary entrance is come in directly passes into one-level cylinder and compresses; Pass into two stage cylinder after the refrigerant mixed that the exhaust of one-level cylinder and secondary inlet are come in, the refrigerant gas that two stage cylinder has compressed is discharged from compressor outlet.
As shown in Figure 4, for the circulation pressure-enthalpy diagram (p – h schemes) of the refrigerator system course of work of the present invention, the system work process of its signal is: within the system, cold-producing medium one has three kinds of pressure states, distinguish the condensing pressure of correspondence circulation, secondary (refrigeration level) evaporating pressure, and one-level (freezing level) evaporating pressure state.The cold-producing medium (1 point) of compressor 101 first-stage cylinder I import department is the superheated steam of being discharged by one-level reheat capillary 103, after one stage of compression (1-1 "); the superheated steam (2 point) of discharging with secondary reheat capillary 104 mixes; fully after mixing (3 point); input compressor 101 secondary cylinder II carries out two-stage compression (3-3 "), obtains the refrigerant vapour of HTHP.Then this steam is by condenser 102, condenses into liquid state (3 "-4).After shunting, enter two-stage respectively, carry out regenerator excessively cold (4-5,4-7), capillary expands (5-5 ', 7-7 '), with evaporator heat exchange (5 '-6,7 '-8), and then pass into regenerator and carry out overheated (6-1,8-2), so far system completes once complete circulation.
Within the system, cold-producing medium is in low, medium and high pressure three pressure states, is divided into by refrigeration for refrigerator refrigeration chamber and refrigerating chamber to freeze two parts.The refrigerant gas of low-temp low-pressure is inhaled into the refrigerant gas becoming medium temperature and medium pressure after compressor 101 first-stage cylinder is compressed, and the refrigerant gas of another part medium temperature and medium pressure exports out from refrigerator evaporator, and the gas after compressing with first-stage cylinder fully mixes.The refrigerant gas of HTHP is become after being inhaled into the compression of compressor secondary cylinder afterwards.The refrigerant gas of HTHP directly passes into condenser 102, carries out heat exchange, become the liquid of HTHP through heat release through the means such as free convection or forced convertion and environment.Then, via the control of pipeline, cold-producing medium flows into the evaporator section of two-stage respectively, after the expansion of two-stage capillary, enter respective evaporimeter carry out heat exchange, become the gas that low-temp low-pressure (one-level) and medium temperature and medium pressure (secondary) are pressed respectively, by regenerator at different levels, to carrying out flowing liquid, to carry out chance cold afterwards, reclaims cold.Finally from one-level low temperature low pressure gas is sucked by compressor first-stage cylinder again, so circulate.
Two straight lines as can be seen from figure, under two same Room design temperatures, the evaporating temperature of secondary refrigerant and the heat transfer temperature difference of refrigerating chamber indoor temperature significantly reduce, and refrigerator system refrigerating efficiency of the present invention is improved greatly.
As shown in Figure 5, for the present invention use independently capillary and regenerator to replace at different levels in reheat capillary after system and device schematic diagram.Instead of reheat capillary (103,104) at different levels with independently regenerator (103a, 104a) and capillary (103b, 104b) in figure, backheat and the throttling function of system can be realized equally.
As shown in Figure 6, the present invention uses two of series connection compressors to replace the system and device schematic diagram after two-stage compressor.Instead of two-stage compressor 101 with the compressor (101a, 101b) of two series connection in figure, the two stages of compression function of system can be realized equally.
As shown in Figure 7, the present invention uses two-step throttle method to replace the system and device schematic diagram after one-level throttling in parallel.In figure, condenser 102 exports the entrance first accessing first order reheat capillary 103c capillary tube segment, then the outlet of first order reheat capillary 103c capillary tube segment is divided into two branch roads, one end is connected with secondary evaporimeter 106 entrance, secondary evaporimeter 106 exports and is connected with the entrance of first order reheat capillary 103c backheat section, and 2. the outlet of backheat section is connected with the secondary inlet of compressor 101; The other end links the entrance of second level reheat capillary 104c capillary tube segment, the outlet of second level reheat capillary 104c capillary tube segment is connected with one-level evaporimeter 105 entrance, one-level evaporimeter 105 exports and is connected with the entrance of second level reheat capillary 104c backheat section, and 1. the outlet of backheat section is connected with the one-level entrance of compressor 101.This kind of throttling method can realize the two-stage refrigerating function of system equally.
Claims (5)
1. a two stages of compression refrigerator system, comprise compressor (101), it is characterized in that: described compressor (101) outlet is connected with condenser (102) entrance, condenser (102) outlet is connected with secondary reheat capillary (104) capillary tube segment entrance with one-level reheat capillary (103) capillary tube segment entrance respectively, the outlet of one-level reheat capillary (103) capillary tube segment is connected with one-level evaporimeter (105) entrance, one-level evaporimeter (105) outlet is connected with one-level reheat capillary (103) backheat section entrance again, the outlet of one-level reheat capillary (103) backheat section is connected with the one-level entrance (1.) of compressor (101), equally, the outlet of secondary reheat capillary (104) capillary tube segment is connected with secondary evaporimeter (106) entrance, secondary evaporimeter (106) outlet is connected with secondary reheat capillary (104) backheat section entrance again, and secondary reheat capillary (104) outlet is connected with the secondary inlet (2.) of compressor (101).
2. a kind of two stages of compression refrigerator system according to claim 1, is characterized in that: use independently capillary and regenerator replace at different levels in reheat capillary, realize backheat in circulation and add the complex function of throttling.
3. a kind of two stages of compression refrigerator system according to claim 1, is characterized in that: use two compressors of series connection to replace two-stage compressor, realize the complex function of two stages of compression in circulation.
4. a kind of two stages of compression refrigerator system according to claim 1, is characterized in that: use two-stage throttling method replaces two one-level throttling methods in parallel, realizes throttling function in circulation.
5. the method for work of two stages of compression refrigerator system described in claim 1, it is characterized in that: the cold-producing medium of compressor (101) first-stage cylinder (I) import department is the superheated steam of being discharged by one-level reheat capillary (103) backheat section, after one stage of compression, the superheated steam of discharging with secondary reheat capillary (104) backheat section mixes, after abundant mixing, two-stage compression is carried out in input compressor (101) secondary cylinder (II), obtains the refrigerant vapour of HTHP; Then this refrigerant vapour is by condenser (102), condenses into liquid state; After shunting, enter the capillary tube segment of one-level reheat capillary (103) and secondary reheat capillary (104) and one-level evaporimeter (105) and secondary evaporimeter (106) respectively, carry out that backheat is excessively cold, capillary expands and evaporator heat exchange, and then the regenerator section passing into one-level reheat capillary (103) and secondary reheat capillary (104) is carried out overheated, so far completes once complete circulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511018201.5A CN105466061A (en) | 2015-12-29 | 2015-12-29 | Two-stage compression refrigerator system and working method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201511018201.5A CN105466061A (en) | 2015-12-29 | 2015-12-29 | Two-stage compression refrigerator system and working method thereof |
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| CN105466061A true CN105466061A (en) | 2016-04-06 |
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| CN201511018201.5A Pending CN105466061A (en) | 2015-12-29 | 2015-12-29 | Two-stage compression refrigerator system and working method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108151348A (en) * | 2017-12-06 | 2018-06-12 | 西安交通大学 | A kind of double-compressor refrigeration system and control method for single space refrigeration |
| CN111213017A (en) * | 2017-09-14 | 2020-05-29 | 伟思环境技术有限公司 | Air conditioning system and device |
| WO2021036115A1 (en) * | 2019-08-26 | 2021-03-04 | 珠海格力电器股份有限公司 | Refrigeration system |
| CN113587468A (en) * | 2021-08-02 | 2021-11-02 | 山东神舟制冷设备有限公司 | Intelligent energy-conserving freezer refrigerating system |
| CN113915873A (en) * | 2021-03-29 | 2022-01-11 | 海信（山东）冰箱有限公司 | A kind of refrigerator |
| CN113915874A (en) * | 2021-03-29 | 2022-01-11 | 海信（山东）冰箱有限公司 | A kind of refrigerator |
| CN114087797A (en) * | 2020-08-05 | 2022-02-25 | 青岛海尔电冰箱有限公司 | Refrigeration system, control method thereof and refrigeration appliance |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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Application publication date: 20160406 |