CN105091386B - A kind of subway station helical-lobe compressor parallel system - Google Patents
A kind of subway station helical-lobe compressor parallel system Download PDFInfo
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- CN105091386B CN105091386B CN201510565032.0A CN201510565032A CN105091386B CN 105091386 B CN105091386 B CN 105091386B CN 201510565032 A CN201510565032 A CN 201510565032A CN 105091386 B CN105091386 B CN 105091386B
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Abstract
The present invention discloses a kind of subway station helical-lobe compressor parallel system, including at least two groups helical-lobe compressors in parallel, the blast pipe and air intake duct of the helical-lobe compressor in parallel are connected respectively to collect for exhaust main and air suction main, and the rated cooling capacity between each helical-lobe compressor is in certain ratio.The parallel connection for the helical-lobe compressor that the present invention passes through more than two different capabilities, and SCREW COMPRESSOR is run according to system loading situation, to ensure the operational efficiency of the helical-lobe compressor in system underload, so as to improve the operational efficiency of whole refrigeration system, in addition, the present invention possesses the advantage of broader operating range and energy-conservation.
Description
Technical field
The present invention relates to helical-lobe compressor technical group field, more particularly to a kind of subway station helical-lobe compressor taken in conjunction
System.
Background technology
Compressor is a kind of driven fluid machinery that low-pressure gas is promoted to high pressure, is the heart of refrigeration system, it
The refrigerant gas of low-temp low-pressure is sucked from air intake duct, is operated by motor after being compressed with piston to it, to blast pipe
The refrigerant gas of HTHP is discharged, power is provided for kind of refrigeration cycle, evaporation is expanded into so as to realize and be compressed to condense to（Inhale
Heat）Kind of refrigeration cycle.
In the prior art, it is usually screw compressor applied to the compressor in refrigeration system, itself and reciprocating piston
The difference of compressor is that the compression process of screw compressor is unidirectional, and when the rotor rotates, refrigerant vapour is compressed
Enter in the teeth groove being mutually twisted and be transported to corresponding compression stroke bottom, in this stage, along with holding for element volume
Continuous to reduce, refrigerant vapour is compressed to condensing pressure from pressure of inspiration(Pi).
During metro operation, the power consumption of air-conditioning system accounts for the 40% ~ 50% of total power consumption, realizes air conditioner system energy saving
Operation is significant.Because air conditioning loads in underground railway is daily all in change with time, there is the obvious peak valley time, air-conditioning system has daily
The time of half is in less than 50% underrun, and the compressor of current subway refrigeration air-conditioning unit can be negative according to air-conditioning
Lotus change carries out varying capacity regulation, but because it uses single screw compressor system, in underrun, helical-lobe compressor
By less than 50% load running, compressor is when low-load is run, and operational efficiency is relatively low, so that whole refrigeration system can be reduced
The operational efficiency of system.Such as the Chinese patent of Application No. 201020531285.9《A kind of energy-saving single screw water cooling group》, should
Patent is accessed in refrigeration system using single screw compressor, and can not solve the problem of operational efficiency is low during low-load, and existing
Also occur multiple compressor parallels in technology to use, such as patent name of Application No. 200910096807.9 is《Rise in a kind of coal seam
Double-screw compressor group》Multigroup compressor parallel is disclosed, still, every group of compressor and indistinction are simply merely in parallel,
Fail to improve operational efficiency during low-load.
The content of the invention
Technical scheme aims to solve the problem that deficiency of the prior art, and there is provided one kind, the operational efficiency in low-load is high
Subway station helical-lobe compressor parallel system.
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, including at least two groups helical-lobe compressors in parallel, the parallel connection
Helical-lobe compressor blast pipe and air intake duct connect collect for exhaust main and air suction main respectively, set on the exhaust main
There is secondary oil separator, refrigerant enters each group helical-lobe compressor by air suction main, then is aggregated into exhaust always from blast pipe discharge
Pipe flows into secondary oil separator, and when helical-lobe compressor in parallel is two groups, the rated cooling capacity of low capacity helical-lobe compressor is
T, the rated cooling capacity of Large Copacity helical-lobe compressor is 2t；When helical-lobe compressor in parallel is three groups, low capacity screw compression
The rated cooling capacity of machine is t, and the rated cooling capacity of middle capacity helical-lobe compressor is 2t, the specified refrigeration of Large Copacity helical-lobe compressor
Measure as 3t.
The present invention is by the helical-lobe compressors of different capabilities and is connected in system, each according to the motor-driven regulation of system different load
Helical-lobe compressor load or out of service between 25 ~ 100%, effect is run so as to realize in system under any loading condiction
Rate is all high, reaches the effect of energy-conservation.Capacity between helical-lobe compressor is proportional, so as to more preferable motor-driven regulation, makes
Operational effect reach it is best.
Further, the helical-lobe compressor is 25% ~ 100% stepless load-adjusting.
Further, the helical-lobe compressor of different capabilities is enabled according to system loading correspondence provided with control system, works as spiral shell
When bar compressor is two groups, operation method is as follows：
When system loading reaches 100%, 100% operation, little Rong at full capacity of control system control Large Copacity helical-lobe compressor
Measure helical-lobe compressor 100% operation at full capacity；
When system loading reaches 65% ~ 100%, 100% operation at full capacity of control system control Large Copacity helical-lobe compressor,
Low capacity helical-lobe compressor sub-load 25% ~ 100% is run；
When system loading reaches 35% ~ 65%, control system control Large Copacity helical-lobe compressor sub-load 25% ~ 100%
Operation, low capacity helical-lobe compressor is out of service；
When system loading is reached below 35%, control system control low capacity helical-lobe compressor sub-load 25% ~ 100%
Operation, Large Copacity helical-lobe compressor is out of service；
When helical-lobe compressor is three groups, parallel running method is as follows：
When system loading reaches 100%, control system controls 100% operation at full capacity of all helical-lobe compressors；
When system loading is in 85% ~ 100%, 100% operation at full capacity of control system control Large Copacity helical-lobe compressor,
Middle capacity helical-lobe compressor 100% operation at full capacity, low capacity helical-lobe compressor sub-load 25% ~ 100% is run；
When system loading reaches 65% ~ 85%, 100% operation at full capacity of control system control Large Copacity helical-lobe compressor, in
Capacity helical-lobe compressor sub-load 25% ~ 100% is run, and low capacity helical-lobe compressor is out of service；
When system loading reaches 50% ~ 65%, 100% operation at full capacity of control system control Large Copacity helical-lobe compressor,
Low capacity helical-lobe compressor sub-load 25% ~ 100% is run, and middle capacity helical-lobe compressor is out of service；
When system loading reaches 35% ~ 50%, capacity helical-lobe compressor 100% operation at full capacity in control system control,
Low capacity helical-lobe compressor sub-load 25% ~ 100% is run, and Large Copacity helical-lobe compressor is out of service；
When system loading reaches 15% ~ 35%, capacity helical-lobe compressor sub-load 25% ~ 100% in control system control
Operation, Large Copacity helical-lobe compressor is out of service, and low capacity helical-lobe compressor is out of service；
When system loading is reached below 15%, control system control low capacity helical-lobe compressor sub-load 25% ~ 100%
Operation, Large Copacity helical-lobe compressor is out of service, and middle capacity helical-lobe compressor is out of service.
Further, each group helical-lobe compressor is provided with independent oil return pipe between secondary oil separator respectively
Road, the return line for be connected with turn between helical-lobe compressor and secondary oil separator ball valve, scavenge oil pump, liquid-sighting glass,
Check valve, screen filtration net and magnetic valve.The present invention can guarantee that in compressor suction and discharge by setting scavenge oil pump on oil return line
Normal oil return and lubrication, make the operating range of compressor broader when pressure differential is less than 4bar, are suitable for transporting under bad working environments
OK.
The secondary oil separator is provided with safety valve.The helical-lobe compressor is provided with high oil level switch.The present invention by
High oil level switch is set to carry out the accurate pasta for controlling compressor lubricant oil just inside compressor, to ensure that compressor was being run
Journey oil return is normal, it is ensured that will not occur partially oily phenomenon.
The beneficial effect that technical scheme is obtained：
The parallel connection for the helical-lobe compressor that the present invention passes through multiple different capabilities, and screw rod pressure is run according to system loading situation
Contracting unit, to ensure the operational efficiency of the helical-lobe compressor in system underload, so as to improve the operation effect of whole refrigeration system
Rate, in addition, the present invention possesses the advantage of broader operating range and energy-conservation.
Brief description of the drawings
Fig. 1：The structural representation of embodiment 1；
Fig. 2：The operational mode flow chart of embodiment 1；
Fig. 3：The structural representation of embodiment 2；
Wherein, 1, Large Copacity helical-lobe compressor；2nd, middle capacity helical-lobe compressor；3rd, low capacity helical-lobe compressor；4th, safety
Valve；5th, secondary oil separator；6th, magnetic valve；7th, screen filtration net；8th, check valve；9th, liquid-sighting glass；10th, scavenge oil pump；11st, ball valve；
Embodiment
The present invention is made with reference to Figure of description and specific embodiment and further being elaborated, but embodiment is simultaneously
The present invention is not limited in any form.
Embodiment 1
Such as Fig. 1, a kind of subway station helical-lobe compressor parallel system, including three groups of helical-lobe compressors in parallel are respectively
Large Copacity helical-lobe compressor 1, middle capacity helical-lobe compressor 2, low capacity helical-lobe compressor 3, the helical-lobe compressor in parallel
Blast pipe and air intake duct are connected respectively to collect for exhaust main and air suction main, and the exhaust main is provided with secondary oil separator
5, refrigerant enters each group helical-lobe compressor by air suction main, then is aggregated into the secondary oil of exhaust main inflow from blast pipe discharge
From device.
Three groups of helical-lobe compressors are provided with independent return line, the return line between secondary oil separator 5 respectively
To be connected with ball valve 11, scavenge oil pump 10, liquid-sighting glass 9, check valve 8, sieve in turn between helical-lobe compressor and secondary oil separator 5
Net filtration net 7 and magnetic valve 6.
Further, the helical-lobe compressor is provided with high oil level switch, and the secondary oil separator 5 is provided with safety valve 4.
The rated cooling capacity of the Large Copacity helical-lobe compressor is 3 times of low capacity helical-lobe compressor rated cooling capacity, in
The rated cooling capacity of capacity helical-lobe compressor is 2 times of low capacity helical-lobe compressor rated cooling capacity.The helical-lobe compressor is
25% ~ 100% stepless load-adjusting.
Such as Fig. 2, the helical-lobe compressor of different capabilities is enabled according to system loading correspondence provided with control system, operation method is such as
Under：
When system loading reaches 100%, control system controls 100% operation at full capacity of all helical-lobe compressors；
When system loading is in 85% ~ 100%, 100% operation at full capacity of control system control Large Copacity helical-lobe compressor,
Middle capacity helical-lobe compressor 100% operation at full capacity, low capacity helical-lobe compressor sub-load 25% ~ 100% is run；
When system loading reaches 65% ~ 85%, 100% operation at full capacity of control system control Large Copacity helical-lobe compressor, in
Capacity helical-lobe compressor sub-load 25% ~ 100% is run, and low capacity helical-lobe compressor is out of service；
When system loading reaches 50% ~ 65%, 100% operation at full capacity of control system control Large Copacity helical-lobe compressor,
Low capacity helical-lobe compressor sub-load 25% ~ 100% is run, and middle capacity helical-lobe compressor is out of service；
When system loading reaches 35% ~ 50%, capacity helical-lobe compressor 100% operation at full capacity in control system control,
Low capacity helical-lobe compressor sub-load 25% ~ 100% is run, and Large Copacity helical-lobe compressor is out of service；
When system loading reaches 15% ~ 35%, capacity helical-lobe compressor sub-load 25% ~ 100% in control system control
Operation, Large Copacity helical-lobe compressor is out of service, and low capacity helical-lobe compressor is out of service；
When system loading is reached below 15%, control system control low capacity helical-lobe compressor sub-load 25% ~ 100%
Operation, Large Copacity helical-lobe compressor is out of service, and middle capacity helical-lobe compressor is out of service.
Embodiment 2
Such as Fig. 3, a kind of subway station helical-lobe compressor parallel system, including two groups of helical-lobe compressors in parallel are respectively
Large Copacity helical-lobe compressor 1 and low capacity helical-lobe compressor 3, blast pipe and the air intake duct difference of the helical-lobe compressor in parallel
Connection collects for exhaust main and air suction main, and the exhaust main is provided with secondary oil separator 5, and refrigerant is by air suction main
Exhaust main inflow secondary oil separator is aggregated into each group helical-lobe compressor, then from blast pipe discharge.
Two groups of helical-lobe compressors are provided with independent return line, the return line between secondary oil separator 5 respectively
To be connected with ball valve 11, scavenge oil pump 10, liquid-sighting glass 9, check valve 8, sieve in turn between helical-lobe compressor and secondary oil separator 5
Net filtration net 7 and magnetic valve 6.
Further, the helical-lobe compressor is provided with high oil level switch, and the secondary oil separator 5 is provided with safety valve 4.
The rated cooling capacity of the Large Copacity helical-lobe compressor is 2 times of low capacity helical-lobe compressor rated cooling capacity.Institute
Helical-lobe compressor is stated for 25% ~ 100% stepless load-adjusting.
Claims (4)
1. a kind of subway station helical-lobe compressor parallel system, including at least two groups helical-lobe compressors in parallel, described in parallel
The blast pipe and air intake duct of helical-lobe compressor are connected respectively to collect for exhaust main and air suction main, and the exhaust main is provided with
Secondary oil separator, refrigerant enters each group helical-lobe compressor by air suction main, then is aggregated into exhaust main from blast pipe discharge
Flow into secondary oil separator, it is characterised in that the helical-lobe compressor is 25% ~ 100% stepless load-adjusting；
When helical-lobe compressor in parallel is two groups, the rated cooling capacity of low capacity helical-lobe compressor is t, Large Copacity screw compression
The rated cooling capacity of machine is 2t；The helical-lobe compressor of different capabilities is enabled according to system loading correspondence provided with control system, it is in parallel
Operation method is as follows：
When system loading reaches 100%, 100% operation, low capacity spiral shell at full capacity of control system control Large Copacity helical-lobe compressor
100% operation at full capacity of bar compressor；When system loading reaches 65% ~ 100%, control system control Large Copacity helical-lobe compressor
100% operation at full capacity, low capacity helical-lobe compressor sub-load 25% ~ 100% is run；When system loading reaches 35% ~ 65%,
Control system control Large Copacity helical-lobe compressor sub-load 25% ~ 100% is run, and low capacity helical-lobe compressor is out of service；When
When system loading reaches less than 35%, control system control low capacity helical-lobe compressor sub-load 25% ~ 100% is run, Large Copacity
Helical-lobe compressor is out of service；
When helical-lobe compressor in parallel is three groups, the rated cooling capacity of low capacity helical-lobe compressor is t, middle capacity screw compression
The rated cooling capacity of machine is 2t, and the rated cooling capacity of Large Copacity helical-lobe compressor is 3t；Provided with control system according to system loading
Correspondence enables the helical-lobe compressor of different capabilities, and parallel running method is as follows：
When system loading reaches 100%, control system controls 100% operation at full capacity of all helical-lobe compressors；Work as system loading
In 85% ~ 100% when, control system control Large Copacity helical-lobe compressor 100% operation at full capacity, middle capacity helical-lobe compressor is expired
Load 100% is run, and low capacity helical-lobe compressor sub-load 25% ~ 100% is run；When system loading reaches 65% ~ 85%, control
System control Large Copacity helical-lobe compressor 100% operation at full capacity processed, middle capacity helical-lobe compressor sub-load 25% ~ 100% is transported
OK, low capacity helical-lobe compressor is out of service；When system loading reaches 50% ~ 65%, control system control Large Copacity screw rod pressure
Contracting machine 100% operation at full capacity, low capacity helical-lobe compressor sub-load 25% ~ 100% is run, and middle capacity helical-lobe compressor stops
Operation；When system loading reaches 35% ~ 50%, capacity helical-lobe compressor 100% operation, little Rong at full capacity in control system control
Measure helical-lobe compressor sub-load 25% ~ 100% to run, Large Copacity helical-lobe compressor is out of service；15% is reached when system loading ~
When 35%, capacity helical-lobe compressor sub-load 25% ~ 100% is run in control system control, and Large Copacity helical-lobe compressor stops
Operation, low capacity helical-lobe compressor is out of service；When system loading is reached below 15%, control system control low capacity screw rod
Compressor section load 25% ~ 100% is run, and Large Copacity helical-lobe compressor is out of service, and middle capacity helical-lobe compressor is out of service.
2. subway station according to claim 1 helical-lobe compressor parallel system, it is characterised in that each group screw rod pressure
Contracting machine respectively between secondary oil separator be provided with independent return line, the return line be helical-lobe compressor with it is secondary
It is connected with ball valve, scavenge oil pump, liquid-sighting glass, check valve, screen filtration net and magnetic valve between oil eliminator in turn.
3. subway station according to claim 1 helical-lobe compressor parallel system, it is characterised in that the helical-lobe compressor
Provided with high oil level switch.
4. subway station according to claim 1 helical-lobe compressor parallel system, it is characterised in that the secondary oil separation
Device 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 true CN105091386B (en) | 2017-09-08 |
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| 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 |
-
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 |
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