CN105091386A - Screw compressor parallel-connection system for subway station - Google Patents
Screw compressor parallel-connection system for subway station Download PDFInfo
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- CN105091386A CN105091386A CN201510565032.0A CN201510565032A CN105091386A CN 105091386 A CN105091386 A CN 105091386A CN 201510565032 A CN201510565032 A CN 201510565032A CN 105091386 A CN105091386 A CN 105091386A
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Abstract
The invention discloses a screw compressor parallel-connection system for a subway station. The screw compressor parallel-connection system for the subway station comprises at least two screw compressors connected in parallel, air exhaust pipes of the screw compressors connected in parallel are connected to form a main air exhaust pipe, air suction pipes of the screw compressors connected in parallel are connected to form a main air suction pipe, and the rated refrigerating capacities of the screw compressors are at a certain ratio. The two or more screw compressors with different capacities are connected in parallel, and the screw compressors are operated according to the load conditions of a system, so that the operation efficiency of the screw compressors under the low-load condition of the system is guaranteed, and the operation efficiency of the whole refrigeration system is improved. In addition, the screw compressor parallel-connection system for the subway station has the advantages of being wider in operation range and saving energy.
Description
Technical field
The present invention relates to helical-lobe compressor technical group field, particularly relate to a kind of subway station helical-lobe compressor parallel system.
Background technology
Compressor is a kind of driven fluid machinery low-pressure gas being promoted to high pressure, it is the heart of refrigeration system, it sucks the refrigerant gas of low-temp low-pressure from air intake duct, after driving piston to compress it by motor rotation, the refrigerant gas of HTHP is discharged to blast pipe, for kind of refrigeration cycle provides power, thus realize being compressed to the kind of refrigeration cycle condensing to and expand into evaporation (heat absorption).
In prior art, the compressor be applied in refrigeration system is generally screw compressor, it is from the different of reciprocating-piston compressor, the compression process of screw compressor is unidirectional, when the rotor rotates, refrigerant vapour to be compressed in the teeth groove of mutually occlusion and to be transported to bottom corresponding compression stroke, in this stage, along with the lasting minimizing of element volume, refrigerant vapour is compressed to condensing pressure from pressure of inspiration(Pi).
In metro operation process, the power consumption of air-conditioning system accounts for 40% ~ 50% of total power consumption, realizes air conditioner system energy saving and runs significant.Because air conditioning loads in underground railway every day is all at change with time, there is the obvious peak valley time, air-conditioning system has the time of half to be in the underrun of less than 50% every day, the compressor of current subway refrigeration air-conditioning unit can carry out varying capacity adjustment according to air conditioner load change, but because it adopts single screw compressor system, when underrun, helical-lobe compressor presses the load running of less than 50%, compressor is when low load running, operational efficiency is lower, thus can reduce the operational efficiency of whole refrigeration system.As the Chinese patent " a kind of energy-saving single screw water cooling group " that application number is 201020531285.9, this patent uses in single screw compressor access refrigeration system, and the problem that when cannot solve low load, operational efficiency is low, and in prior art, also occur that multiple compressor parallel uses, if application number is that 200910096807.9 patent names organize compressor parallel for " double-screw compressor group is played in a kind of coal seam " discloses more, but, the compressor often organized indistinction, just merely in parallel, and fail operational efficiency when improving low load.
Summary of the invention
Technical scheme of the present invention is intended to solve deficiency of the prior art, provides a kind of subway station helical-lobe compressor parallel system that operational efficiency is high when low load.
The technical purpose of technical solution of the present invention is achieved in the following manner:
A kind of subway station helical-lobe compressor parallel system, comprise the helical-lobe compressor of at least two group parallel connections, blast pipe and the air intake duct of the helical-lobe compressor of described parallel connection are connected respectively and gather for exhaust main and air suction main, described exhaust main is provided with secondary oil separator, cold-producing medium enters each group of helical-lobe compressor by air suction main, discharge from blast pipe again and be aggregated into exhaust main inflow secondary oil separator, when the helical-lobe compressor of parallel connection is two groups, the specified refrigerating capacity of low capacity helical-lobe compressor is t, and the specified refrigerating capacity of Large Copacity helical-lobe compressor is 2t; When the helical-lobe compressor of parallel connection is three groups, the specified refrigerating capacity of low capacity helical-lobe compressor is t, and the specified refrigerating capacity of middle capacity helical-lobe compressor is 2t, and the specified refrigerating capacity of Large Copacity helical-lobe compressor is 3t.
The present invention is by the helical-lobe compressor of different capabilities and link in system, according to each helical-lobe compressor of the motor-driven adjustment of system different load load or out of service between 25 ~ 100%, thus realize all high in system operational efficiency under any loading condiction, reach energy-conservation effect.Capacity between helical-lobe compressor is proportional, thus can better motor-driven adjustment, makes operational effect reach best.
Further, described helical-lobe compressor is 25% ~ 100% stepless load-adjusting.
Further, be provided with control system enables different capabilities helical-lobe compressor according to system loading correspondence, when helical-lobe compressor is two groups, operation method is as follows:
When system loading reaches 100%, control system controls Large Copacity helical-lobe compressor and 100% runs at full capacity, and low capacity screw compression 100% is run at full capacity;
When system loading reaches 65% ~ 100%, control system controls Large Copacity helical-lobe compressor and 100% runs at full capacity, and low capacity screw compression part load 25% ~ 100% runs;
When system loading reaches 35% ~ 65%, control system controls Large Copacity helical-lobe compressor sub-load 25% ~ 100% and runs, and low capacity screw compression is out of service;
When system loading reaches below 35%, control system controls low capacity helical-lobe compressor sub-load 25% ~ 100% and runs, and Large Copacity screw compression is out of service;
When helical-lobe compressor be three groups time, parallel running method is as follows:
When system loading reaches 100%, control system controls all helical-lobe compressors and 100% runs at full capacity;
When system loading is in 85% ~ 100%, control system controls Large Copacity helical-lobe compressor and 100% runs at full capacity, and middle capacity helical-lobe compressor 100% runs at full capacity, and low capacity screw compression part load 25% ~ 100% runs;
When system loading reaches 65% ~ 85%, control system controls Large Copacity helical-lobe compressor and 100% runs at full capacity, and middle capacity screw compression part load 25% ~ 100% runs, and low capacity compressor is out of service;
When system loading reaches 50% ~ 65%, control system controls Large Copacity helical-lobe compressor and 100% runs at full capacity, and low capacity screw compression part load 25% ~ 100% runs, and middle capacity compressor is out of service;
When system loading reaches 35% ~ 50%, during control system controls, capacity helical-lobe compressor 100% runs at full capacity, and low capacity screw compression part load 25% ~ 100% runs, and Large Copacity compressor is out of service;
When system loading reaches 15% ~ 35%, during control system controls, capacity helical-lobe compressor sub-load 25% ~ 100% is run, and Large Copacity compressor is out of service, and low capacity compressor is out of service;
When system loading reaches below 15%, control system controls low capacity helical-lobe compressor sub-load 25% ~ 100% and runs, and Large Copacity screw compression is out of service, and middle capacity compressor is out of service.
Further, respectively and be provided with independently return line between secondary oil separator, described return line for be connected with ball valve, scavenge oil pump, liquid-sighting glass, check valve, screen filtration net and magnetic valve in turn between helical-lobe compressor and secondary oil separator for described each group of helical-lobe compressor.The present invention, by arranging scavenge oil pump on oil return line, can ensure normal oil return and lubrication when compressor Suck and exhaust pressure difference is less than 4bar, make the operating range of compressor broader, more can adapt to run under bad working environments.
Described secondary oil separator is provided with safety valve.Described helical-lobe compressor is provided with high oil level switch.The present invention, by arranging the pasta height that high oil level switch accurately controls compressor lubricant oil in compressor inside, to guarantee that compressor is normal in running oil return, guarantees partially oily phenomenon can not occur.
The beneficial effect that technical scheme of the present invention obtains:
The present invention is by the parallel connection of the helical-lobe compressor of multiple different capabilities, and run SCREW COMPRESSOR according to system loading situation, to ensure the operational efficiency of the helical-lobe compressor when system underload, thus improve the operational efficiency of whole refrigeration system, in addition, the present invention possesses broader operating range and energy-conservation advantage.
Accompanying drawing explanation
Fig. 1: embodiment 1 structural representation;
Fig. 2: embodiment 1 operational mode flow chart;
Fig. 3: embodiment 2 structural representation;
Wherein, 1, Large Copacity helical-lobe compressor; 2, middle capacity helical-lobe compressor; 3, low capacity helical-lobe compressor; 4, safety valve; 5, secondary oil separator; 6, magnetic valve; 7, screen filtration net; 8, check valve; 9, liquid-sighting glass; 10, scavenge oil pump; 11, ball valve.
Detailed description of the invention
Below in conjunction with Figure of description and specific embodiment the present invention made and elaborating further, but embodiment does not limit in any form the present invention.
Embodiment 1
As Fig. 1, a kind of subway station helical-lobe compressor parallel system, comprise the helical-lobe compressor of three groups of parallel connections, be respectively Large Copacity helical-lobe compressor 1, middle capacity helical-lobe compressor 2, low capacity helical-lobe compressor 3, blast pipe and the air intake duct of the helical-lobe compressor of described parallel connection are connected respectively and gather for exhaust main and air suction main, described exhaust main is provided with secondary oil separator 5, cold-producing medium enters each group of helical-lobe compressor by air suction main, then is aggregated into exhaust main inflow secondary oil separator from blast pipe discharge.
Two groups of helical-lobe compressors are provided with independently return line respectively and between secondary oil separator 5, and described return line for be connected with ball valve 11, scavenge oil pump 10, liquid-sighting glass 9, check valve 8, screen filtration net 7 and magnetic valve 6 in turn between helical-lobe compressor and secondary oil separator 5.
Further, described helical-lobe compressor is provided with high oil level switch, and described secondary oil separator 5 is provided with safety valve 4.
The specified refrigerating capacity of described Large Copacity helical-lobe compressor is 3 times of the specified refrigerating capacity of low capacity helical-lobe compressor, and the specified refrigerating capacity of middle capacity helical-lobe compressor is 2 times of the specified refrigerating capacity of low capacity helical-lobe compressor.Described helical-lobe compressor is 25% ~ 100% stepless load-adjusting.
As Fig. 2, be provided with control system enables different capabilities helical-lobe compressor according to system loading correspondence, operation method is as follows:
When system loading reaches 100%, control system controls all helical-lobe compressors and 100% runs at full capacity;
When system loading is in 85% ~ 100%, control system controls Large Copacity helical-lobe compressor and 100% runs at full capacity, and middle capacity helical-lobe compressor 100% runs at full capacity, and low capacity screw compression part load 25% ~ 100% runs;
When system loading reaches 65% ~ 85%, control system controls Large Copacity helical-lobe compressor and 100% runs at full capacity, and middle capacity screw compression part load 25% ~ 100% runs, and low capacity compressor is out of service;
When system loading reaches 50% ~ 65%, control system controls Large Copacity helical-lobe compressor and 100% runs at full capacity, and low capacity screw compression part load 25% ~ 100% runs, and middle capacity compressor is out of service;
When system loading reaches 35% ~ 50%, during control system controls, capacity helical-lobe compressor 100% runs at full capacity, and low capacity screw compression part load 25% ~ 100% runs, and Large Copacity compressor is out of service;
When system loading reaches 15% ~ 35%, during control system controls, capacity helical-lobe compressor sub-load 25% ~ 100% is run, and Large Copacity compressor is out of service, and low capacity compressor is out of service;
When system loading reaches below 15%, control system controls low capacity helical-lobe compressor sub-load 25% ~ 100% and runs, and Large Copacity screw compression is out of service, and middle capacity compressor is out of service.
Embodiment 2
As Fig. 3, a kind of subway station helical-lobe compressor parallel system, comprise the helical-lobe compressor of two groups of parallel connections, be respectively Large Copacity helical-lobe compressor 1 and low capacity helical-lobe compressor 2, blast pipe and the air intake duct of the helical-lobe compressor of described parallel connection are connected respectively and gather for exhaust main and air suction main, described exhaust main is provided with secondary oil separator 5, and cold-producing medium enters each group of helical-lobe compressor by air suction main, then is aggregated into exhaust main inflow secondary oil separator from blast pipe discharge.
Two groups of helical-lobe compressors are provided with independently return line respectively and between secondary oil separator 5, and described return line for be connected with ball valve 3, scavenge oil pump 10, liquid-sighting glass 9, check valve 8, screen filtration net 7 and magnetic valve 6 in turn between helical-lobe compressor and secondary oil separator 5.
Further, described helical-lobe compressor is provided with high oil level switch, and described secondary oil separator 5 is provided with safety valve 4.
The specified refrigerating capacity of described Large Copacity helical-lobe compressor is 2 times of the specified refrigerating capacity of low capacity helical-lobe compressor.Described helical-lobe compressor is 25% ~ 100% stepless load-adjusting.
Claims (7)
1. a subway station helical-lobe compressor parallel system, comprise the helical-lobe compressor of at least two group parallel connections, blast pipe and the air intake duct of the helical-lobe compressor of described parallel connection are connected respectively and gather for exhaust main and air suction main, described exhaust main is provided with secondary oil separator, cold-producing medium enters each group of helical-lobe compressor by air suction main, discharge from blast pipe again and be aggregated into exhaust main inflow secondary oil separator, it is characterized in that, when the helical-lobe compressor of parallel connection is two groups, the specified refrigerating capacity of low capacity helical-lobe compressor is t, the specified refrigerating capacity of Large Copacity helical-lobe compressor is 2t,
When the helical-lobe compressor of parallel connection is three groups, the specified refrigerating capacity of low capacity helical-lobe compressor is t, and the specified refrigerating capacity of middle capacity helical-lobe compressor is 2t, and the specified refrigerating capacity of Large Copacity helical-lobe compressor is 3t.
2. subway station helical-lobe compressor parallel system according to claim 1, is characterized in that, described helical-lobe compressor is 25% ~ 100% stepless load-adjusting.
3. subway station helical-lobe compressor parallel system according to claim 1 and 2, is characterized in that, is provided with control system and enables the helical-lobe compressor of different capabilities according to system loading correspondence, when helical-lobe compressor be two groups time, parallel running method is as follows:
When system loading reaches 100%, control system controls Large Copacity helical-lobe compressor and 100% runs at full capacity, and low capacity screw compression 100% is run at full capacity;
When system loading reaches 65% ~ 100%, control system controls Large Copacity helical-lobe compressor and 100% runs at full capacity, and low capacity screw compression part load 25% ~ 100% runs;
When system loading reaches 35% ~ 65%, control system controls Large Copacity helical-lobe compressor sub-load 25% ~ 100% and runs, and low capacity screw compression is out of service;
When system loading reaches below 35%, control system controls low capacity helical-lobe compressor sub-load 25% ~ 100% and runs, and Large Copacity screw compression is out of service.
4. subway station helical-lobe compressor parallel system according to claim 1 and 2, is characterized in that, is provided with control system and enables the helical-lobe compressor of different capabilities according to system loading correspondence, when helical-lobe compressor be three groups time, parallel running method is as follows:
When system loading reaches 100%, control system controls all helical-lobe compressors and 100% runs at full capacity;
When system loading is in 85% ~ 100%, control system controls Large Copacity helical-lobe compressor and 100% runs at full capacity, and middle capacity helical-lobe compressor 100% runs at full capacity, and low capacity screw compression part load 25% ~ 100% runs;
When system loading reaches 65% ~ 85%, control system controls Large Copacity helical-lobe compressor and 100% runs at full capacity, and middle capacity screw compression part load 25% ~ 100% runs, and low capacity compressor is out of service;
When system loading reaches 50% ~ 65%, control system controls Large Copacity helical-lobe compressor and 100% runs at full capacity, and low capacity screw compression part load 25% ~ 100% runs, and middle capacity compressor is out of service;
When system loading reaches 35% ~ 50%, during control system controls, capacity helical-lobe compressor 100% runs at full capacity, and low capacity screw compression part load 25% ~ 100% runs, and Large Copacity compressor is out of service;
When system loading reaches 15% ~ 35%, during control system controls, capacity helical-lobe compressor sub-load 25% ~ 100% is run, and Large Copacity compressor is out of service, and low capacity compressor is out of service;
When system loading reaches below 15%, control system controls low capacity helical-lobe compressor sub-load 25% ~ 100% and runs, and Large Copacity screw compression is out of service, and middle capacity compressor is out of service.
5. subway station helical-lobe compressor parallel system according to claim 1, it is characterized in that, respectively and be provided with independently return line between secondary oil separator, described return line for be connected with ball valve, scavenge oil pump, liquid-sighting glass, check valve, screen filtration net and magnetic valve in turn between helical-lobe compressor and secondary oil separator for described each group of helical-lobe compressor.
6. subway station helical-lobe compressor parallel system according to claim 1, it is characterized in that, described helical-lobe compressor is provided with high oil level switch.
7. subway station helical-lobe compressor parallel system according to claim 1, it is characterized in that, described secondary oil separator is provided with safety valve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510565032.0A CN105091386B (en) | 2015-09-08 | 2015-09-08 | A kind of subway station helical-lobe compressor parallel system |
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| CN201510565032.0A CN105091386B (en) | 2015-09-08 | 2015-09-08 | A kind of subway station helical-lobe compressor parallel system |
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| CN105091386B CN105091386B (en) | 2017-09-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109441808A (en) * | 2018-09-19 | 2019-03-08 | 东莞市正旭新能源设备科技有限公司 | Single machine with variable speed screw compressor system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4102149A (en) * | 1977-04-22 | 1978-07-25 | Westinghouse Electric Corp. | Variable capacity multiple compressor refrigeration system |
| CN1782617A (en) * | 2004-11-04 | 2006-06-07 | 维尼亚曼多株式会社 | Air conditioner and its control method |
| CN201255525Y (en) * | 2008-08-20 | 2009-06-10 | 肖晓松 | Refrigerating compressor set |
| CN205048776U (en) * | 2015-09-08 | 2016-02-24 | 广东申菱环境系统股份有限公司 | Helical -lobe compressor parallel system for subway station |
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2015
- 2015-09-08 CN CN201510565032.0A patent/CN105091386B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4102149A (en) * | 1977-04-22 | 1978-07-25 | Westinghouse Electric Corp. | Variable capacity multiple compressor refrigeration system |
| CN1782617A (en) * | 2004-11-04 | 2006-06-07 | 维尼亚曼多株式会社 | Air conditioner and its control method |
| CN201255525Y (en) * | 2008-08-20 | 2009-06-10 | 肖晓松 | Refrigerating compressor set |
| CN205048776U (en) * | 2015-09-08 | 2016-02-24 | 广东申菱环境系统股份有限公司 | Helical -lobe compressor parallel system for subway station |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109441808A (en) * | 2018-09-19 | 2019-03-08 | 东莞市正旭新能源设备科技有限公司 | Single machine with variable speed screw compressor system |
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