CN105020953A - Control method of compressor unit - Google Patents
Control method of compressor unit Download PDFInfo
- Publication number
- CN105020953A CN105020953A CN201510323716.XA CN201510323716A CN105020953A CN 105020953 A CN105020953 A CN 105020953A CN 201510323716 A CN201510323716 A CN 201510323716A CN 105020953 A CN105020953 A CN 105020953A
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- Prior art keywords
- compressor
- described compressor
- water temperature
- running time
- accumulated running
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Links
- 238000000034 method Methods 0.000 title claims abstract description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 49
- 230000009194 climbing Effects 0.000 claims description 11
- 230000006835 compression Effects 0.000 claims description 7
- 238000007906 compression Methods 0.000 claims description 7
- 230000001186 cumulative effect Effects 0.000 abstract 2
- 230000009897 systematic effect Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
Classifications
-
- 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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The embodiment of the invention discloses a control method of a compressor unit. The method comprises the following steps: detecting the cumulative running time of each compressor in the compressor unit; executing start and stop control on the compressor according to the cumulative running time of the compressor. The control method of the compressor unit, disclosed by the embodiment of the invention, is used for realizing balance of the running time of all the compressors in the compressor unit.
Description
Technical field
The embodiment of the present invention relates to heat pump assembly technical field, particularly relates to a kind of control method of compressor bank.
Background technology
In large-sized wind cooling handpiece Water Chilling Units, because unit cold is large, single compressor cannot meet cold requirement, often can use multiple compressors design.For multi-compressor unit, the main Load Regulation mode adopted has two kinds.The first load regulation mode is: compressor starts one by one, and after upper system compressors startup is extremely fully loaded, next system compressors is restarted; The second load regulation mode is: compressor starts simultaneously, and the operation between compressor is without interrelated effect.
These two kinds of control modes all likely occur, complete machine is not in energy-efficient running status, cannot equalizing compressor run time, may there is one of them high frequent start-stop, affect unit operation reliability, particularly when customer charge fluctuates.
Summary of the invention
In view of this, the embodiment of the present invention proposes a kind of control method of compressor bank, to balance the running time of each compressor in described compressor bank.
Embodiments provide a kind of control method of compressor bank, described method comprises:
Detect the accumulated running time of each compressor in described compressor bank;
Accumulated running time according to described compressor performs on off control to described compressor.
The control method of the compressor bank that the embodiment of the present invention provides, by detecting the running time of each compressor in described compressor bank, and according to the running time of described compressor, on off control is performed to described compressor, thus achieve the balance of the running time in compressor bank between each compressor.
Accompanying drawing explanation
By reading the detailed description done non-limiting example done with reference to the following drawings, other features, objects and advantages of the present invention will become more obvious:
Fig. 1 is the flow chart of the control method of the compressor bank that first embodiment of the invention provides;
Fig. 2 is the flow chart of the control method of the compressor bank that second embodiment of the invention provides;
Fig. 3 is the flow chart of the control method of the compressor bank that third embodiment of the invention provides;
Fig. 4 is the flow chart of the control method of the compressor bank that fourth embodiment of the invention provides;
Fig. 5 is the flow chart of the load regulation that a kind of preferred embodiment of fourth embodiment of the invention provides;
Fig. 6 is the flow chart of the load regulation that the another kind of preferred embodiment of fourth embodiment of the invention provides.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described in further detail.Be understandable that, specific embodiment described herein is only for explaining the present invention, but not limitation of the invention.It also should be noted that, for convenience of description, illustrate only part related to the present invention in accompanying drawing but not full content.
First embodiment
Present embodiments provide a kind of technical scheme of the control method of compressor bank.In this technical scheme, the control method of described compressor bank comprises: the running time detecting each compressor in described compressor bank; Running time according to described compressor performs on off control to described compressor.
See Fig. 1, the control method of described compressor bank comprises:
S11, detects the accumulated running time of each compressor in described compressor bank.
The present embodiment by arranging a central processing unit for compressor bank, and detects the accumulated running time of each compressor in described compressor bank by this central processing unit.Described accumulated running time is accumulative running time of described compressor bank wherein each compressor in the on state, and described accumulated running time does not generally reset.Only have when described compressor bank entirety is out of service, in described compressor bank, the accumulated running time parameter of each compressor just can be cleared.
S12, the accumulated running time according to described compressor performs on off control to described compressor.
After getting the accumulated running time of each compressor in described compressor bank, according to the accumulated running time got, on off control is performed to described compressor.Such as, when the accumulated running time of a compressor is greater than the accumulated running time of other compressors, this compressor should be preferentially allowed to shut down.Again such as, when the accumulated running time of a compressor is significantly less than the accumulated running time of other compressors, this compressor should be preferentially allowed to start running.
In addition, after open command or halt instruction are sent to the compressor in described compressor bank, also need to see whether this compressor meets entry condition or stop condition, this compressor finally could be allowed to start or stop.
That is, perform on off control according to the accumulated running time of described compressor to described compressor specifically can comprise: when meeting entry condition, the compressor that preferential startup accumulated running time is short; Or when meeting stop condition, preferential compressor of closing accumulated running time length.
Preferably, described entry condition comprises: the leaving water temperature of described compressor is greater than the leaving water temperature upper limit threshold of setting, or actual water temperature rate of change is greater than water temperature rate of change setting threshold value, and distance last compression machine start-up operation have passed through the open operation time interval of setting.The water temperature obtained from the water outlet measurement of compressor bank is referred to during described leaving water temperature.Described actual water temperature rate of change refers to the rate of change of described leaving water temperature.In addition, described entry condition and described stop condition are suitable for and each compressor in described compressor bank.Described leaving water temperature upper limit threshold is provided by formula below:
T
max＝T
s+(ΔT÷N) (1)
Wherein, T
maxdescribed leaving water temperature upper limit threshold, T
sbe refrigeration water outlet set temperature, Δ T compressor open temp deviation, N is the number of compressors in compressor bank.
Can see from formula (1), described leaving water temperature upper limit threshold is relevant to number of compressors, such optimum configurations makes described leaving water temperature upper limit threshold relevant to the number of compressors in described compressor bank, can overcome the phenomenon of the high frequent start and stop in compressor bank.
Described actual water temperature rate of change is provided by formula (2):
λ＝(Ta(n)-Ta(n-1)/Δt) (2)
Wherein, λ is actual water temperature rate of change, and Ta (n) is the leaving water temperature on the n-th sampled point, and Ta (n-1) is the leaving water temperature on (n-1)th sampled point, and Δ t is the time interval between the n-th sampled point and (n-1)th sampled point.Described water temperature rate of change setting threshold value is the same with described actual water temperature rate of change, and its unit is all DEG C/min.
Preferably, described stop condition comprises: the leaving water temperature of described compressor is less than the leaving water temperature lower threshold of setting, and the closed operation of distance last compression office have passed through the shutoff operation time interval of setting.Further, described leaving water temperature lower threshold is provided by following formula:
T
min＜Ts-1 (3)
Wherein, T
minbe described leaving water temperature lower threshold, Ts is the leaving water temperature of setting.
The present embodiment is by detecting the running time of each compressor in described compressor bank, and according to the running time of described compressor, on off control is performed to described compressor, effective to balancing the running time of each compressor in compressor bank, improve the operational reliability of whole system.
Second embodiment
The present embodiment, based on the above embodiment of the present invention, further provides a kind of technical scheme of the control method of compressor bank.In this technical scheme, according to the accumulated running time of described compressor, on off control is performed to described compressor and comprise: when meeting entry condition, the compressor that preferential startup accumulated running time is short; Or when meeting stop condition, preferential compressor of closing accumulated running time length.Further, perform on off control and also comprise: when meeting entry condition, if the accumulated running time of at least two compressors is identical according to accumulated running time of described compressor to described compressor, the preferential title that starts sorts forward compressor; Or when meeting stop condition, if the accumulated running time of at least two compressors is identical, preferential title of closing sorts forward compressor.
See Fig. 2, the control method of described compressor bank comprises:
S21, detects the accumulated running time of each compressor in described compressor bank.
S22, when meeting entry condition, the compressor that preferential startup accumulated running time is short, or when meeting stop condition, preferential compressor of closing accumulated running time length.
Concrete, when entry condition meets, perform first compression machine start-up operation.In the operation of this compressor start, the compressor that in unit, accumulated running time is the shortest is preferentially started.Accordingly, when stop condition meets, perform the shut-down operation of first compression machine.In this compressor shut-down operation, the compressor that in unit, accumulated running time is the longest is preferentially stopped.
In above-mentioned start-up operation or shut-down operation, if the situation that the accumulated running time of two compressors is identical, then determine the compressor that be activated or stop according to the title of described compressor.Such as, in start-up operation, if there is the accumulated running time of two compressors identical, then selects title in two compressors to sort a forward compressor, this compressor is started.Accordingly, in shut-down operation, if there is the accumulated running time of two compressors identical, same select title in two compressors to sort a forward compressor, this compressor is started.
The present embodiment passes through the compressor that preferentially startup accumulated running time is short, or the preferential compressor stopping accumulated running time length, achieves and controls the operation of each compressor in compressor bank according to accumulated running time.
3rd embodiment
Present embodiments provide a kind of technical scheme of the control method of compressor bank.See Fig. 3, the control method of described compressor bank comprises:
S31, judges whether to meet compressor unlocking condition, if so, performs S32, if not, performs S34.
S32, calculates compressor accumulated running time.
S33, the compressor unlatching that accumulated running time is short.
Now, if the accumulated running time of two compressors is identical, the compressor that systematic naming method is low, namely the title forward compressor that sorts preferentially is opened.
S34, judges whether that meeting compressor closes condition, if so, performs S25, performs S27 if not.
S35, calculates the accumulated running time of compressor.
S36, the compressor unlatching that accumulated running time is long.
Now, if the accumulated running time of two compressors is identical, the compressor that systematic naming method is low is opened.
S37, the compressor opened carries out adding unloading according to load, does not have the compression of opening to perform S31.
The present embodiment is by closing the judgement of condition to compressor unlocking condition or compressor, and the calculating of accumulated running time to compressor, achieves the balance of the running time in compressor bank between different compressors.
4th embodiment
The present embodiment, based on the above embodiment of the present invention, further provides a kind of technical scheme of the control method of compressor bank.In this technical scheme, the control method of described compressor bank also comprises: according to the leaving water temperature parameter of each compressor in described compressor bank, carry out load regulation to described compressor.
See Fig. 4, the control method of described compressor bank comprises:
S41, detects the accumulated running time of each compressor in described compressor bank.
S42, the accumulated running time according to described compressor performs on off control to described compressor.
S43, according to the leaving water temperature parameter of each compressor in described compressor bank, carries out load regulation to described compressor.
Described leaving water temperature parameter can be leaving water temperature itself, also can be can be derived other parameters obtained by described leaving water temperature.
See Fig. 5, preferably, according to the leaving water temperature parameter of each compressor in described compressor bank, load regulation is carried out to described compressor and comprises:
S51, if the load deviation of described compressor is greater than load deviation upper limit threshold, described compressor climbing loads.
Described load deviation is provided by following formula:
ΔQ＝ΔT1+λ (4)
Wherein, Δ Q is described load deviation, and Δ T1 is the difference between actual leaving water temperature Ta and setting leaving water temperature Ts, and λ is actual water temperature rate of change.Preferably, described load deviation upper limit threshold is set as 0.5.
S52, if the load deviation of described compressor is not more than load deviation lower threshold, described compressor climbing unloading.
Preferably, described load deviation upper limit threshold is set as-0.5.
S53, if the load deviation of described compressor is not more than described load deviation upper limit threshold, and is greater than described load deviation lower threshold, and described compressor climbing keeps.
See Fig. 6, further preferably, according to the leaving water temperature parameter of each compressor in described compressor bank, load regulation is carried out to described compressor and comprises:
S61, if the load deviation of described compressor is greater than load deviation upper limit threshold, described compressor climbing loads.
S62, if the load deviation of described compressor is not more than load deviation lower threshold, described compressor climbing unloading.
S63, if the load deviation of described compressor is not more than described load deviation upper limit threshold, and is greater than described load deviation lower threshold, and described compressor climbing keeps.
S64, when actual water temperature rate of change is greater than operation water temperature rate of change threshold value, described compressor forces climbing to load.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, to those skilled in the art, the present invention can have various change and change.All do within spirit of the present invention and principle any amendment, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. a control method for compressor bank, is characterized in that, comprising:
Detect the accumulated running time of each compressor in described compressor bank;
Accumulated running time according to described compressor performs on off control to described compressor.
2. method according to claim 1, is characterized in that, performs on off control comprise according to the accumulated running time of described compressor to described compressor:
When meeting entry condition, the compressor that preferential startup accumulated running time is short; Or
When meeting stop condition, preferential compressor of closing accumulated running time length.
3. method according to claim 2, is characterized in that, performs on off control also comprise according to the accumulated running time of described compressor to described compressor:
When meeting entry condition, if the accumulated running time of at least two compressors is identical, the preferential title that starts sorts forward compressor; Or
When meeting entry condition, if the accumulated running time of at least two compressors is identical, preferential title of closing sorts forward compressor.
4., according to the arbitrary described method of claims 1 to 3, it is characterized in that, described method also comprises:
According to the leaving water temperature parameter of each compressor in described compressor bank, load regulation is carried out to described compressor.
5. method according to claim 4, is characterized in that, according to the leaving water temperature parameter of each compressor in described compressor bank, carries out load regulation comprise described compressor:
If the load deviation of described compressor is greater than load deviation upper limit threshold, described compressor climbing loads;
If the load deviation of described compressor is not more than load deviation lower threshold, described compressor climbing unloading; And
If the load deviation of described compressor is not more than described load deviation upper limit threshold, and be greater than described load deviation lower threshold, described compressor climbing keeps.
6. method according to claim 5, is characterized in that, according to the leaving water temperature parameter of each compressor in described compressor bank, carries out load regulation also comprise described compressor:
When actual water temperature rate of change is greater than operation water temperature rate of change threshold value, described compressor forces climbing to load.
7. method according to claim 2, it is characterized in that, described entry condition comprises: the leaving water temperature of described compressor is greater than the leaving water temperature upper limit threshold of setting, or actual water temperature rate of change is greater than water temperature rate of change setting threshold value, and distance last compression machine start-up operation have passed through the open operation time interval of setting.
8. method according to claim 2, is characterized in that, described stop condition comprises: the leaving water temperature of described compressor is less than the leaving water temperature lower threshold of setting, and the closed operation of distance last compression office have passed through the shutoff operation time interval of setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510323716.XA CN105020953B (en) | 2015-06-12 | 2015-06-12 | The control method of compressor set |
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|---|---|---|---|
| CN201510323716.XA CN105020953B (en) | 2015-06-12 | 2015-06-12 | The control method of compressor set |
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| CN105020953B CN105020953B (en) | 2018-06-01 |
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Cited By (7)
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| CN106288175A (en) * | 2016-08-12 | 2017-01-04 | 珠海格力电器股份有限公司 | Modular combination air conditioning system and compressor control device thereof and method |
| CN107575369A (en) * | 2017-09-30 | 2018-01-12 | 湖北特威特动力科技股份有限公司 | Air compressor remote centralized plenum system and its energy-saving control method |
| CN108106291A (en) * | 2018-01-25 | 2018-06-01 | 天津商业大学 | The control method and control device of start/stop of compressor in Parallel sets |
| CN109579190A (en) * | 2018-12-25 | 2019-04-05 | 新奥数能科技有限公司 | A kind of method and apparatus of the determining heat pump unit compressor method of operation |
| CN110986453A (en) * | 2019-12-18 | 2020-04-10 | 珠海格力电器股份有限公司 | Refrigerator and compressor starting control method, device and system thereof |
| CN114413456A (en) * | 2022-01-14 | 2022-04-29 | 埃能科技(广州)有限公司 | Group control method and equipment for chilled water system of central air conditioner |
| CN115046339A (en) * | 2022-05-13 | 2022-09-13 | 青岛澳柯玛生物医疗有限公司 | Parallel control system and method for variable frequency press |
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| CN106288175A (en) * | 2016-08-12 | 2017-01-04 | 珠海格力电器股份有限公司 | Modular combination air conditioning system and compressor control device thereof and method |
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| CN115046339A (en) * | 2022-05-13 | 2022-09-13 | 青岛澳柯玛生物医疗有限公司 | Parallel control system and method for variable frequency press |
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| CN105020953B (en) | 2018-06-01 |
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Inventor after: Cheng Qi Inventor after: Zhou Tingyu Inventor after: Daikun Inventor after: Pan Yi Inventor after: Liu Jinjun Inventor after: Liao Juan Inventor after: Zhao Zhongmin Inventor after: Chen Peisheng Inventor after: Zou Yingnan Inventor after: Wang Xiuchuan Inventor after: Chen Xibao Inventor after: Shi Jiangang Inventor after: Li Jian Inventor after: Liu Mingquan Inventor before: Cheng Qi Inventor before: Chen Peisheng |
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Effective date of registration: 20221028 Address after: 519070 No. 789 Jinji Road West, Zhuhai, Guangdong Patentee after: GREE ELECTRIC APPLIANCES,Inc.OF ZHUHAI Patentee after: SHANGHAI NUCLEAR ENGINEERING RESEARCH & DESIGN INSTITUTE Co.,Ltd. Address before: GREE ELECTRIC APPLIANCES,Inc.OF ZHUHAI Patentee before: GREE ELECTRIC APPLIANCES,Inc.OF ZHUHAI Patentee before: STATE NUCLEAR POWER ENGINEERING Co. |
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Address after: 519070 No. 789 Jinji Road West, Zhuhai, Guangdong Patentee after: GREE ELECTRIC APPLIANCES,Inc.OF ZHUHAI Patentee after: Shanghai Nuclear Engineering Research and Design Institute Co.,Ltd. Address before: 519070 No. 789 Jinji Road West, Zhuhai, Guangdong Patentee before: GREE ELECTRIC APPLIANCES,Inc.OF ZHUHAI Patentee before: SHANGHAI NUCLEAR ENGINEERING RESEARCH & DESIGN INSTITUTE Co.,Ltd. |