CN102494429A - Two-stage compression integrated low-temperature refrigerating unit - Google Patents
Two-stage compression integrated low-temperature refrigerating unit Download PDFInfo
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- CN102494429A CN102494429A CN2011104053659A CN201110405365A CN102494429A CN 102494429 A CN102494429 A CN 102494429A CN 2011104053659 A CN2011104053659 A CN 2011104053659A CN 201110405365 A CN201110405365 A CN 201110405365A CN 102494429 A CN102494429 A CN 102494429A
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Abstract
The invention discloses a two-stage compression integrated low-temperature refrigerating unit and belongs to the technical field of refrigeration. The two-stage compression integrated low-temperature refrigerating unit comprises a preceding-stage compressor (1), a mixed gas cooler (2), a flash evaporator (3), a succeeding-stage compressor (4), an oil separator (5), a surface evaporative condenser (6), a water spray cooling nozzles (7), a water holding tray (8), a circulating water pump (9), an oil cooler (10), a fluorine storage (11), a dry filter (12), a main electromagnetic valve (13), an energy-saving economizer (14), a dry evaporator (15), a liquid inlet valve (16), a main liquid supply valve (17), a bypass valve (18), an electric control cabinet (19), a throttling valve (20), a preceding-stage compressor oil return port (21), a succeeding-stage compressor oil return port (22), a preceding-stage compressor working medium return port (23), a succeeding-stage compressor working medium return port (24), a control valve (25) and an exhaust fan (26). Medium-temperature working medium gas discharged by the preceding-stage compressor (1) is cooled by low-temperature steam flash-evaporated by the flash evaporator (3) in the mixed gas cooler (2), then is sent into the succeeding-stage compressor (4) for continued pressure rise, and then is condensed into a working medium liquid when flowing through the surface evaporative condenser (6); and the working medium liquid is stored in the fluorine storage (11), is depressurized by the throttling valve (20), enters the flash evaporator (3) for liquid supercooling for the first time, flows into the energy-saving economizer (14), is supercooled for the second time and enters the evaporator (15) for evaporative refrigeration. The flash evaporator (3), the surface evaporative condenser (6) and the energy-saving economizer (14) are arranged, so the two-stage compression integrated low-temperature refrigerating unit has the advantages of high energy efficiency ratio, small volume, convenience for installation and long service life.
Description
Technical field:
Title of the present invention is the compression integrated low temperature refrigerator group of twin-stage, belongs to the industrial refrigeration field.It comprises preceding stage compressor 1; Hybrid cold air device 2; Flash vessel 3; Back stage compressor 4; Oil content device 5; Surface evaporation condenser 6; Water spray cooling mouth 7; Water dish 8; Water circulating pump 9; Oil cooler 10; Fluorine storing device 11; Device for drying and filtering 12; Main solenoid valve 13; Energy saving economy device 14; Evaporimeter 15; Feed liquor valve 16; Main supplying valve 17; Bypass valve 18; Electrical control cubicles 19; Choke valve 20; Preceding stage compressor oil return opening 21; Back stage compressor oil return opening 22; Preceding stage compressor returns working medium mouth 23; Back stage compressor returns working medium mouth 24; Control valve 25; Ventilating fan 26.Before the stage compressor 1 middle temperature Working medium gas of discharging be flashed low-temperature steam that device 3 flashes off and after hybrid cold air device 2 coolings, send into back stage compressor 4 and continue to boost, the surface evaporation condenser 6 of then flowing through is condensed into worker quality liquid and storage at fluorine storing device 11; Get into flash vessel 3 through choke valve 20 step-downs again and cross the energy saving economy device 14 of flowing through after cold through liquid for the first time, through for the second time cold after, entering evaporimeter 15 sweat coolings.Owing to increased flash vessel 3 surface evaporation condensers 6 energy saving economy devices 14 newly, cause that the compression integrated Cryo Refrigerator of twin-stage has the Energy Efficiency Ratio height, volume is little and the advantage of long service life easy for installation.
Background technology:
Mostly existing Cryo Refrigerator is to adopt the two-stage compressor separate type to install, and the high-temperature gas of first order compressor outlet is just to get into high stage compressor after being cooled off by recirculated water, and the system complex floor space is big; Condenser also is to lean on water cooling, and indispensable ground has all used cooling tower, and the cooling tower volume has circulation greatly again; Inconvenience is arranged at the scene; And the working medium in the condenser will just can be condensed through two heat transfer links, so heat transfer temperature difference is bigger, has reduced the Energy Efficiency Ratio of system.Oil cooler also will be used recirculated water, and this has just strengthened the recirculated water consumption.Traditional low temperature unit is no economizer and flash vessel, so its Energy Efficiency Ratio is not high.
Summary of the invention:
In order to remedy above-mentioned deficiency of the prior art, patent of the present invention it comprise before stage compressor 1, hybrid cold air device 2, flash vessel 3, back stage compressor 4, oil content device 5, surface evaporation condenser 6, water spray cooling mouth 7, water dish 8, water circulating pump 9, oil cooler 10, fluorine storing device 11, device for drying and filtering 12, main solenoid valve 13, energy saving economy device 14, evaporimeter 15, feed liquor valve 16, main supplying valve 17, bypass valve 18, electrical control cubicles 19, choke valve 20, preceding stage compressor oil return opening 21, back stage compressor oil return opening 22, preceding stage compressor return working medium mouth 23, the back stage compressor returns working medium mouth 24, control valve 25, ventilating fan 26.Before the stage compressor 1 middle temperature Working medium gas of discharging be flashed low-temperature steam that device 3 flashes off and after hybrid cold air device 2 coolings, send into the surface evaporation condenser 6 of flowing through after back stage compressor 4 continues to boost and be condensed into worker quality liquid and be stored in the fluorine storing device 11; It is cold excessively then after choke valve 20 step-downs, to go flash vessel 3 to carry out first time liquid again; Its supercooling temperature is corresponding with intermediate pressure; For the first time liquid is crossed and got into 14 pairs of working medium of energy saving economy device after the temperature that is as cold as intermediate pressure to carry out the second time further cold excessively, get into evaporimeter 15 sweat coolings then.Owing to increased energy saving economy device 14, flash vessel 3, surface evaporation condenser 6 newly, cause that the compression integrated low temperature refrigerator group of twin-stage has the Energy Efficiency Ratio height, volume is little and advantage easy for installation, long service life.
Description of drawings:
Fig. 1. be the compression integrated low temperature refrigerator group system diagram of twin-stage,
Wherein: stage compressor before the 1--; The hybrid cold air device of 2--; The 3--flash vessel; Stage compressor behind the 4--; 5--oil content device; 6--surface evaporation condenser; 7--water spray cooling mouth; The 8--water dish; The 9--water circulating pump; The 10--oil cooler; The 11--fluorine storing device; The 12--device for drying and filtering; The 13--main solenoid valve; 14--energy saving economy device; 15 evaporimeters; 16--feed liquor valve; 17--master's supplying valve; The 18--bypass valve; The 19--electrical control cubicles; The 20--choke valve; Stage compressor oil return opening before the 21--; Stage compressor oil return opening behind the 22--; Stage compressor returns the working medium mouth before the 23--; Stage compressor returns the working medium mouth behind the 24--; The 25--control valve; The 26--ventilating fan.
The exhaust outlet of preceding stage compressor 1 and the gas side entrance of hybrid cold air device 2 link fixed; The gas side outlet of hybrid cold air device 2 links fixed with the inlet of back stage compressor 4; The outlet of flash vessel 3 flash vapors links fixed with the mixed gas inlet of hybrid cold air device 2; The air inlet of the outlet of back stage compressor 4 and oil content device 5 links fixed; The inlet of the exhaust outlet of oil content device 5 and surface evaporation condenser 6 links fixed, and the inlet of the outlet of surface evaporation condenser 6 and fluorine storing device 11 links fixed, and the leakage fluid dram of fluorine storing device 11 and device for drying and filtering 12 inlets link fixed; Device for drying and filtering 12 outlet with respectively with main solenoid valve 13, and the inlet of two control valves 25 link fixed; The inlet of the outlet of main solenoid valve 13 and choke valve 20 links fixed, and the inlet of the outlet of choke valve 20 and flash vessel 3 links fixed, and the inlet of the leakage fluid dram of flash vessel 3 and energy saving economy device 14 links fixed; The inlet of the leakage fluid dram of energy saving economy device 14 and main supplying valve 17 and bypass valve 18 links fixed; The outlet of main supplying valve 17 and bypass valve 18 and the inlet of feed liquor valve 16 link fixed, and the inlet of the outlet of feed liquor valve 16 and evaporimeter 15 links fixed, and the air entry of the outlet of evaporimeter 15 and preceding stage compressor 1 links fixed.Stage compressor 1, hybrid cold air device 2, flash vessel 3, back stage compressor 4, oil content device 5, surface evaporation condenser 6, water spray cooled off mouth 7, water dish 8, water circulating pump 9 connections before electrical control cubicles 19 reached through control line and 25 connections of each control valve.Surface evaporation condenser 6 places the below of water spray cooling mouth 7; The inlet of 1～1000 water spray cooling mouth 7 and the outlet of water circulating pump 9 link fixed; The delivery port of the inlet of water circulating pump 9 and water dish 8 links fixed, and ventilating fan 26 is positioned at the top of surface evaporation condenser 6 and water spray cooling mouth 7.The oiler of oil cooler 10 links fixed with the oil drain out of oil content device 5 behind control valve 25; The oil drain out of oil cooler 10 links fixed with preceding stage compressor oil return opening 21 and back stage compressor oil return opening 22 behind two control valves 25 respectively; The cooling working medium inlet of oil cooler 10 behind control valve 25, exports with device for drying and filtering 12 respectively and the cooling working medium inlet of energy saving economy device 14 links fixed; The cooling working medium outlet of oil cooler 10 is returned working medium mouth 24 with the back stage compressor and is linked fixed; The cooling working medium outlet of energy saving economy device 14 is returned working medium mouth 23 with preceding stage compressor and is linked fixed behind control valve 25.
Case study on implementation:
Fig. 1 is the compression integrated low temperature refrigerator group system diagram of 150KW/-35 ℃ twin-stage.Stage compressor 1 was pressurized to behind the 0.45MPa in the past that the outlet of stage compressor 1 flows to hybrid cold air device 2 before the 0.13Mpa low pressure working fluid steam of discharging from the outlet of evaporimeter 15 got into; The refrigerant vapor of flash vessel 3 flash distillation rear sections-35 ℃ mixes with the steam of 0.45MPa and its cooling is chilled to after 5～10 ℃ the inflow inlet of stage compressor 4 afterwards from the hybrid cold air device 2 of entering of outlet output; Further be compressed to the air inlet that gets into oil content device 5 behind the 1.35MPa again; After in oil content device 5, the oil in the Working medium gas being separated; Clean steam gets into the inlet of surface evaporation condenser 6; When from surface evaporation condenser 6, flowing through, after being condensed into liquid refrigerant, the cold water of cooling mouth 7 ejections of being sprayed water flows to the inlet that stores and be sent to device for drying and filtering 12 in the fluorine storing device 11.Liquid refrigerant is after flowing to choke valve 20 expenditure and pressures after device for drying and filtering 12 dryings; Get into again and utilize back one stage compressor to carry out flash distillation in the flash vessel 3; Make liquid cool to 0 ℃ and get into the inlet of energy saving economy device 14, in energy saving economy device 14, carry out secondary and cross and be as cold as-18 ℃ of inflow evaporators 15 at-35 ℃ of following sweat coolings.The working medium that device for drying and filtering 12 distributes flows to respectively after the cooling working medium inlet of cooling working medium inlet and energy saving economy device 14 that two control valves 25 flow into oil cooler 10 respectively is the liquid refrigerant temperature control in the oil of oil cooler 10 and the energy saving economy device 14 that suction inlet 24 and preceding stage compressor return middle suction inlet 23 in the middle of the stage compressor of back.Stage compressor oil return opening 21 and back stage compressor oil return opening 22 before the oil drain out of oil cooler 10 is not sent to cooled oil content; The usefulness of stage compressor 1 and back stage compressor 4 lubrication and seals before supplying; The sender property outlet of oil cooler 10 behind control valve 25 with the back stage compressor return working medium mouth 24 link fixed, the outlet of the cooling working medium of energy saving economy device 14 through control valve 25 after and preceding stage compressor return working medium mouth 23 and link fixed.Delivering to water spray cooling mouth 7 after recirculated water in the water dish 8 is pressurizeed by water circulating pump 9 cools off for surface evaporation condenser 6 water sprays.Owing to used the Energy Efficiency Ratio of surface evaporation condenser 6, energy saving economy device 14, flash vessel 3 and the compression integrated low temperature refrigerator group of water spray cooling mouth 7 these twin-stages to improve 20%.
Claims (3)
1. compression integrated low temperature refrigerator group of twin-stage, it comprises that preceding stage compressor 1, hybrid cold air device 2, flash vessel 3, back stage compressor 4, oil content device 5, surface evaporation condenser 6, water spray cooling mouth 7, water dish 8, water circulating pump 9, oil cooler 10, fluorine storing device 11, device for drying and filtering 12, main solenoid valve 13, energy saving economy device 14, evaporimeter 15, feed liquor valve 16, main supplying valve 17, bypass valve 18, electrical control cubicles 19, choke valve 20, preceding stage compressor oil return opening 21, back stage compressor oil return opening 22, preceding stage compressor return working medium mouth 23, the back stage compressor returns working medium mouth 24, control valve 25, ventilating fan 26; The gas side entrance of exhaust outlet and the hybrid cold air device 2 of stage compressor 1 links fixedly before it is characterized in that, the gas side outlet of hybrid cold air device 2 links fixed with the back inlet of stage compressor 4; The mixed gas inlet of outlet of flash vessel 3 flash vapors and hybrid cold air device 2 links fixed, and the air inlet of the outlet of back stage compressor 4 and oil content device 5 links fixed; The inlet of the exhaust outlet of oil content device 5 and surface evaporation condenser 6 links fixed, and the inlet of the outlet of surface evaporation condenser 6 and fluorine storing device 11 links fixed, and the leakage fluid dram of fluorine storing device 11 and device for drying and filtering 12 inlets link fixed; The inlet of device for drying and filtering 12 outlets and choke valve 20 links fixed, and the inlet of the outlet of choke valve 20 and flash vessel 3 links fixed; The inlet of the leakage fluid dram of flash vessel 3 and energy saving economy device 14 links fixed; The inlet of the leakage fluid dram of energy saving economy device 14 and main supplying valve 17 and bypass valve 18 links fixed; The outlet of main supplying valve 17 and bypass valve 18 and the outlet of feed liquor valve 16 link fixed; The inlet of the outlet of feed liquor valve 16 and evaporimeter 15 links fixed, and the air entry of the outlet of evaporimeter 15 and preceding stage compressor 1 links fixed; Stage compressor 1, hybrid cold air device 2, flash vessel 3, back stage compressor 4, oil content device 5, surface evaporation condenser 6, water spray cooling mouth 7, water dish 8, water circulating pump 9 connections before electrical control cubicles 19 reaches through control line and each control valve 25.
2. the surface evaporation condenser 6 of the compression integrated Cryo Refrigerator of twin-stage as claimed in claim 1; It is characterized in that surface evaporation condenser 6 places the below of water spray cooling mouth 7; The inlet of 1～1000 water spray cooling mouth 7 and the outlet of water circulating pump 9 link fixed, and the delivery port of the inlet of water circulating pump 9 and water dish 8 links fixed; Ventilating fan 26 is positioned at surface evaporation condenser 6 and water spray cooling mouth 7 tops.
3. the oil cooler 10 of the compression integrated Cryo Refrigerator of twin-stage as claimed in claim 1, the oiler that it is characterized in that oil cooler 10 link fixed with the oil drain out of oil content device 5 behind control valve 25; The oil drain out of oil cooler 10 links fixed with preceding stage compressor oil return opening 21 and back stage compressor oil return opening 22 behind control valve 25 respectively; The cooling working medium inlet of oil cooler 10 behind control valve 25, exports with device for drying and filtering 12 respectively and the cooling working medium inlet of energy saving economy device 14 links fixed; The cooling working medium outlet of oil cooler 10 is returned working medium mouth 24 with the back stage compressor and is linked fixed; The cooling working medium outlet of energy saving economy device 14 is returned working medium mouth 23 with preceding stage compressor and is linked fixed behind control valve 25.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011104053659A CN102494429A (en) | 2011-12-08 | 2011-12-08 | Two-stage compression integrated low-temperature refrigerating unit |
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| CN2011104053659A CN102494429A (en) | 2011-12-08 | 2011-12-08 | Two-stage compression integrated low-temperature refrigerating unit |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103040076A (en) * | 2012-12-05 | 2013-04-17 | 洪晓 | Immersing type instant freezer |
| CN106196733A (en) * | 2016-08-29 | 2016-12-07 | 上海柯茂机械有限公司 | Integrating device for heat pump |
| CN107985005A (en) * | 2016-10-26 | 2018-05-04 | 珠海格力节能环保制冷技术研究中心有限公司 | A kind of automobile and its air-conditioning system |
| CN108204693A (en) * | 2017-12-26 | 2018-06-26 | 重庆翔源制冷设备股份有限公司 | Refrigeration waste heat is converted into environmentally friendly new energy unit |
| CN112902503A (en) * | 2021-02-03 | 2021-06-04 | 四川长虹空调有限公司 | Variable frequency multi-split air conditioning unit heating oil return control method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103040076A (en) * | 2012-12-05 | 2013-04-17 | 洪晓 | Immersing type instant freezer |
| CN106196733A (en) * | 2016-08-29 | 2016-12-07 | 上海柯茂机械有限公司 | Integrating device for heat pump |
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| CN107985005A (en) * | 2016-10-26 | 2018-05-04 | 珠海格力节能环保制冷技术研究中心有限公司 | A kind of automobile and its air-conditioning system |
| CN107985005B (en) * | 2016-10-26 | 2024-02-09 | 珠海格力节能环保制冷技术研究中心有限公司 | Automobile and air conditioning system thereof |
| CN108204693A (en) * | 2017-12-26 | 2018-06-26 | 重庆翔源制冷设备股份有限公司 | Refrigeration waste heat is converted into environmentally friendly new energy unit |
| CN112902503A (en) * | 2021-02-03 | 2021-06-04 | 四川长虹空调有限公司 | Variable frequency multi-split air conditioning unit heating oil return control method |
| CN112902503B (en) * | 2021-02-03 | 2022-11-29 | 四川长虹空调有限公司 | Variable frequency multi-split air conditioner heating oil return control method |
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Application publication date: 20120613 |