CN103233893A - Capacity adjusting control method of multi-nose screw compressor - Google Patents
Capacity adjusting control method of multi-nose screw compressor Download PDFInfo
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- CN103233893A CN103233893A CN2013101488304A CN201310148830A CN103233893A CN 103233893 A CN103233893 A CN 103233893A CN 2013101488304 A CN2013101488304 A CN 2013101488304A CN 201310148830 A CN201310148830 A CN 201310148830A CN 103233893 A CN103233893 A CN 103233893A
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000011017 operating method Methods 0.000 claims description 3
- 238000005461 lubrication Methods 0.000 abstract description 12
- 239000003921 oil Substances 0.000 description 16
- 239000003507 refrigerant Substances 0.000 description 8
- 238000006073 displacement reaction Methods 0.000 description 4
- 230000004907 flux Effects 0.000 description 4
- 238000005057 refrigeration Methods 0.000 description 4
- 239000006200 vaporizer Substances 0.000 description 4
- 239000010725 compressor oil Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003134 recirculating effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
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Abstract
The invention provides a capacity adjusting control method of a multi-nose screw compressor. The capacity adjusting control method solves the problem that the existing multi-nose screw compressor unit in an operation mode is poor in lubrication. The capacity adjusting control method of the multi-nose screw compressor comprises the following steps of 1, starting up and judging whether loading is required; 2, detecting the running time of each compressor before the loading; 3, loading the compressor with the shortest running time; 4, loading the compressor with the second shortest running time; 5, loading gradually and sequentially till the load requirement is met; 6, judging whether unloading is required; 7, detecting the running time of each compressor before the unloading; 8, unloading the compressor with the longest running time; 9, unloading the compressor with the second shortest running time; and 10, unloading gradually and sequentially till the load requirement is met. According to the capacity adjusting control method, for a condition that poor lubrication can occur when the compressor runs in a partial load state for a long time, a controller controls each compressor to act sequentially and adjacently according to the running time, so that oil return of the compressor is good, and the operation quality of the compressor can be improved.
Description
Technical field
The present invention relates to have the use equipment of multiple compressors unit, particularly a kind of multimachine head screw compressor capacity adjustment control method.
Background technique
The helical-lobe compressor that adopts on the market mostly is segmentation capacity regulating form now, and is namely general except starting capacity level, also has 3 capacity levels to use.In the use of multimachine head screw rod unit, in the process that applied load constantly changes, can occur load in compressor loads or the uninstall process and rest under 50% or 75% the state and move, be sub load and keep the district.
The energy adjustment control of present most of multimachine head screw rod unit all is that balance starts, at first detect the working time of compressor, the compressor starts the shortest from working time starts, arrange successively, start earlier operation 25%(and start capacity level), wait all compressor 25%(to start capacity level) start finish after, all compressor start 50%(sub loads again), be the 75%(sub load then), be the 100%(full load condition at last); In when unloading, from the longest compressor starts unloading working time, arrange successively, unloading 100% earlier, wait all compressors 100% unloadings to finish after, all compressor unloadings 75% are 50% then again, are 25% at last, until shutdown.
When indoor load is less, certainly will cause the compressor long-play under the state of sub load, the air displacement minimizing can appear if rest on this state (sub load) for a long time, the cold medium flux that enters vaporizer reduces, the refrigerant flow rate of associated compressors getter action reduces, cause refrigeration oil to cross the oil mass minimizing that hot gas returns compressor with refrigerant, long-play can cause compressor internal lubrication oil level to reduce, and causes the bad problem of compressor lubrication.And compressor starts capacity level at 25%() state following working time unsuitable long, namely generally in 30S, overlong time above compressor recirculating oil quantity also can occur and reduce the situation of insufficient lubrication.
Summary of the invention
The objective of the invention is to have the problems referred to above at existing technology, proposed a kind of in the equipment that the multiple compressors cooperating is arranged, the independent load of carrying out mutual noninterference between each compressor is controlled, and according to the working time of complete load or unload in turn, to reach the multimachine head screw compressor capacity adjustment control method that promotes the running quality.
Purpose of the present invention can realize by following technical proposal: multimachine head screw compressor capacity adjustment control method, it is characterized in that, and comprise following operating procedure:
(1), when the multimachine head apparatus is opened operation, judges whether its load needs to load;
(2), load operation, at first detect working time of each compressor;
(3), working time the shortest compressor as first compressor that starts, make this compressor at first start-up loading finish by 25%-50%-75%-100% is fully loaded;
(4), continue to judge whether oepration at full load, if still need load, start second working time short compressor by the 25%-50%-75%-100% loaded;
(5), according to the length of working time one by one order load compressor, until meeting the load requirement, keep compressor behavior;
(6), judge whether load needs unloading;
(7), unloading operation, at first detect working time of each compressor;
(8), working time the longest compressor as the compressor of first unloading, make this compressor at first unload the completion of discharge by 100%-75%-50%-25%-0;
(9), continue to judge whether whole unloadings, if still need unload, control the compressor of second long operational time by the 100%-75%-50%-25%-0 completion of discharge;
(10), according to the length of working time one by one order unload compressor, until meeting the load requirement, keep compressor behavior.
In above-mentioned multimachine head screw compressor capacity adjustment control method, described a certain compressor in service is in sub load, and do not comprise 25% running state, its operation forces to be loaded on 100% full load condition after arriving set time, if need unload again, should get rid of this compressor, judge in the residue platform number that working time, the longest compressor unloaded; If have only a compressor in operation, force to be loaded into 100% full load condition after arriving set time, when unload as needs, this compressor is unloaded, the loading, the unloading that move in circles of a compressor operates thus.A certain compressor is in the set time of operation at part load state can be adjusted, and is set at one hour usually.Owing under part load condition, move for a long time, the air displacement of compressor will reduce, the cold medium flux that enters vaporizer also reduces synchronously, the refrigerant flow rate of associated compressors getter action reduces, can cause refrigeration oil to cross the oil mass minimizing that hot gas returns compressor with refrigerant, and then long-play can cause compressor internal lubrication oil oil level to reduce, and namely causes compressor lubrication bad.
In above-mentioned multimachine head screw compressor capacity adjustment control method, described a certain compressor in service is in 25% running state, this compressor was shut down after operation arrived set time, if need load again, should get rid of this compressor, judge in the residue platform number that working time, the shortest compressor loaded; If also need unload, should get rid of this compressor, judge in the residue platform number that working time, the longest compressor unloaded.A certain compressor is in the set time of 25% running state can be adjusted, and is set at 25S usually.Compressor is at 25% load, the state that namely starts capacity level is unsuitable long following working time, generally require in 30S, the air displacement that compressor also can appear in overlong time reduces, the cold medium flux that enters vaporizer also reduces synchronously, and the refrigerant flow rate of associated compressors getter action reduces, and can cause refrigeration oil to cross the oil mass minimizing that hot gas returns compressor with refrigerant, and then long-play can cause compressor internal lubrication oil oil level to reduce, and namely causes the compressor lubrication condition of poor.
Compared with prior art, this multimachine head screw compressor capacity adjustment control method at compressor for a long time in sub load with start the situation that insufficient lubrication can appear in operation under the state of capacity level, control each compressor according to the working time of adjacency action in turn by controller, make the compressor oil return good, in order to promote its running quality.
Description of drawings
Fig. 1 is the flow process theory diagram of this multimachine head screw compressor capacity adjustment control method.
Embodiment
Below be specific embodiments of the invention and by reference to the accompanying drawings, technological scheme of the present invention is further described, but the present invention be not limited to these embodiments.
As shown in Figure 1, this multimachine head screw compressor capacity adjustment control method comprises following operating procedure:
(1), when the multimachine head apparatus is opened operation, judges whether its load needs to load;
(2), load operation, at first detect working time of each compressor;
(3), working time the shortest compressor as first compressor that starts, make this compressor at first start-up loading finish by 25%-50%-75%-100% is fully loaded;
(4), continue to judge whether oepration at full load, if still need load, start second working time short compressor by the 25%-50%-75%-100% loaded;
(5), according to the length of working time one by one order load compressor, until meeting the load requirement, keep compressor behavior;
(6), judge whether load needs unloading;
(7), unloading operation, at first detect working time of each compressor;
(8), working time the longest compressor as the compressor of first unloading, make this compressor at first unload the completion of discharge by 100%-75%-50%-25%-0;
(9), continue to judge whether whole unloadings, if still need unload, control the compressor of second long operational time by the 100%-75%-50%-25%-0 completion of discharge;
(10), according to the length of working time one by one order unload compressor, until meeting the load requirement, keep compressor behavior.
In the long-time running of multiple compressors unit equipment, the situation of full load, sub load or shutdown can appear operating in compressor.In this case, a certain compressor is in sub load, and do not comprise 25% running state, will after moving one hour, this compressor (time is adjustable) force to be loaded into 100% full load condition, if need unloading again, will get rid of the compressor that this pressure loads, and in residue platform number, judge working time the longest compressor and unload; If have only a compressor in operation, arrive set time after (time is adjustable) force to be loaded into 100% full load condition, when unload as needs, this compressor is unloaded, the loading, the unloading that move in circles of a compressor operates thus.
The reason of way is owing to move under part load condition for a long time thus, the air displacement of compressor will reduce, the cold medium flux that enters vaporizer also reduces synchronously, the refrigerant flow rate of associated compressors getter action reduces, can cause refrigeration oil to cross the oil mass minimizing that hot gas returns compressor with refrigerant, and then long-play can cause compressor internal lubrication oil oil level to reduce, and namely causes compressor lubrication bad.
Compressor operating is at 25% load, and the state that namely starts capacity level is unsuitable long following working time, and general requirement is adjustable in the 30S(time) in.It is in service if a certain compressor is in 25% running state, the operation 25S(time is adjustable) after this compressor be forced to shut down, if need again to load, should get rid of the compressor of this forced stoppage, in residue platform number, judge working time the shortest compressor and load; If also need unloading, also should get rid of the compressor of this forced stoppage, in residue platform number, judge working time the longest compressor and unload.
Specific embodiment described herein only is that the present invention's spirit is illustrated.Those skilled in the art can make various modifications or replenish or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Claims (3)
1. multimachine head screw compressor capacity adjustment control method is characterized in that, comprises following operating procedure:
(1), when the multimachine head apparatus is opened operation, judges whether its load needs to load;
(2), load operation, at first detect working time of each compressor;
(3), working time the shortest compressor as first compressor that starts, make this compressor at first start-up loading finish by 25%-50%-75%-100% is fully loaded;
(4), continue to judge whether oepration at full load, if still need load, start second working time short compressor by the 25%-50%-75%-100% loaded;
(5), according to the length of working time one by one order load compressor, until meeting the load requirement, keep compressor behavior;
(6), judge whether load needs unloading;
(7), unloading operation, at first detect working time of each compressor;
(8), working time the longest compressor as the compressor of first unloading, make this compressor at first unload the completion of discharge by 100%-75%-50%-25%-0;
(9), continue to judge whether whole unloadings, if still need unload, control the compressor of second long operational time by the 100%-75%-50%-25%-0 completion of discharge;
(10), according to the length of working time one by one order unload compressor, until meeting the load requirement, keep compressor behavior.
2. multimachine head screw compressor capacity adjustment control method according to claim 1, it is characterized in that, described a certain compressor in service is in sub load, and do not comprise 25% running state, its operation forces to be loaded on 100% full load condition after arriving set time, if need unload again, should get rid of this compressor, judge in the residue platform number that working time, the longest compressor unloaded; If have only a compressor in operation, operation at part load is forced to be loaded on 100% full load condition after arriving set time, when unload as needs, this compressor is unloaded, and the loading, the unloading that move in circles of a compressor operates thus.
3. multimachine head screw compressor capacity adjustment control method according to claim 1, it is characterized in that, described a certain compressor in service is in 25% running state, this compressor was shut down after operation arrived set time, if need load again, should get rid of this compressor, judge in the residue platform number that working time, the shortest compressor loaded; If also need unload, should get rid of this compressor, judge in the residue platform number that working time, the longest compressor unloaded.
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| CN201310148830.4A CN103233893B (en) | 2013-04-26 | 2013-04-26 | Multi-machine heads screw compressor capacity adjustment control method |
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Cited By (7)
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| CN104566859A (en) * | 2014-12-22 | 2015-04-29 | 珠海格力电器股份有限公司 | Anti-freezing control method and device of air conditioning unit |
| CN104848620A (en) * | 2015-05-11 | 2015-08-19 | 珠海格力电器股份有限公司 | Startup load control method and system for screw-type water chilling unit |
| CN105020953A (en) * | 2015-06-12 | 2015-11-04 | 珠海格力电器股份有限公司 | Control method of compressor unit |
| CN106351823A (en) * | 2016-11-02 | 2017-01-25 | 中车株洲电力机车有限公司 | Control method and device of locomotive compressors |
| CN107990597A (en) * | 2017-10-25 | 2018-05-04 | 珠海格力电器股份有限公司 | Refrigeration system method for controlling oil return and device |
| CN112459998A (en) * | 2020-11-24 | 2021-03-09 | 爱景智能装备(无锡)有限公司 | Method for rapidly judging starting and stopping priority in multiple air compressors |
| CN113417843A (en) * | 2021-08-10 | 2021-09-21 | 天津森普捷电子有限公司 | Control method of multi-machine-head air compressor controller |
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Cited By (10)
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| CN104848620A (en) * | 2015-05-11 | 2015-08-19 | 珠海格力电器股份有限公司 | Startup load control method and system for screw-type water chilling unit |
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| CN107990597A (en) * | 2017-10-25 | 2018-05-04 | 珠海格力电器股份有限公司 | Refrigeration system method for controlling oil return and device |
| CN112459998A (en) * | 2020-11-24 | 2021-03-09 | 爱景智能装备(无锡)有限公司 | Method for rapidly judging starting and stopping priority in multiple air compressors |
| CN113417843A (en) * | 2021-08-10 | 2021-09-21 | 天津森普捷电子有限公司 | Control method of multi-machine-head air compressor controller |
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| CN103233893B (en) | 2015-09-02 |
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Address after: No. 48 Huanghe West Road, Qingdao Economic and Technological Development Zone, Shandong Province, 266510 Patentee after: Qingdao Aolikai Energy Co.,Ltd. Address before: No. 48 Huanghe West Road, Qingdao Economic and Technological Development Zone, Shandong Province, 266510 Patentee before: QINGDAO ALKKT CENTRAL AIR CONDITIONER CO.,LTD. |