CN102538144A - Control method of multi-connected air conditioning unit - Google Patents
Control method of multi-connected air conditioning unit Download PDFInfo
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- CN102538144A CN102538144A CN2012100328483A CN201210032848A CN102538144A CN 102538144 A CN102538144 A CN 102538144A CN 2012100328483 A CN2012100328483 A CN 2012100328483A CN 201210032848 A CN201210032848 A CN 201210032848A CN 102538144 A CN102538144 A CN 102538144A
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Abstract
A control method of a multi-connected air conditioning unit comprises an air conditioner main body consisting of more than two outdoor units and indoor units which are connected in parallel, wherein each outdoor unit comprises a host outdoor unit and a slave outdoor unit, and the power output of the outdoor units is accurately controlled according to the actual power demand condition of the indoor units; the rotation of each outdoor unit and the variable frequency compressor thereof is completed by the following stages: the first stage, judging whether the system load Q is less than the set capacity Q2; the second stage, judging whether the system load Q is larger than the set capacity Q1; and the third stage, judging whether the system load Q is larger than the set capacity Q2 and smaller than the set capacity Q1. The invention adopts the full-variable-frequency compressor alternate control and the outdoor unit automatic alternate control, realizes that the system load is in a certain range, accurately controls the power output of the outdoor unit according to the actual power demand condition of the indoor unit, and alternately uses the outdoor unit and the variable-frequency compressor thereof, thereby prolonging the service life of the multi-connected air conditioner outdoor unit and the unit. And meanwhile, no additional equipment is required to be added.
Description
Technical field
The present invention relates to a kind of control method of VRF Air Conditioning System.
Background technology
In current refrigerating and air conditioning industry field, connected formula air-conditioning undoubtedly is the main product on the how online market, uses very extensively.For connected formula air-conditioning, generally there are following two weak points, thereby shorten the service life of unit greatly.Long-term little load operation of the first and indoor set frequent start-stop cause off-premises station frequency-changeable compressor frequent start-stop, and unit service life is directly shortened in oil return in time and damaging; Its two load is relatively big, but just off-premises station main frame long-time running, an outer machine breaks down, and whole unit all can quit work, and has shortened the reliability and the stability of the outdoor unit of multi-connected air conditioner greatly.Therefore, be necessary to do further improvement and perfect.
Summary of the invention
The object of the invention aims to provide a kind of control method of VRF Air Conditioning System of simple and reasonable, with low cost, safe and reliable and long service life, to overcome weak point of the prior art.
Press the control method of a kind of VRF Air Conditioning System of this purpose design; Comprise the air conditioner main body that the off-premises station that is connected in parallel more than two and indoor set constitute; Off-premises station comprises main frame off-premises station and slave off-premises station, it is characterized in that accurately controlling according to the actual power demand status of indoor set the power output of off-premises station; Rotating of each off-premises station and frequency-changeable compressor thereof, by accomplishing with the next stage:
Phase I, judge system loading Q whether less than the capacity of setting Q2, the main frame off-premises station is an opening, and the slave off-premises station is a closed condition;
Second stage, judge system loading Q whether greater than the capacity of setting Q1, main frame off-premises station and slave off-premises station are opening;
Phase III, judge that system loading Q is whether greater than the capacity of setting Q2; And less than the capacity of setting Q1, the main frame off-premises station is an opening, and the slave off-premises station is a closed condition; Reaching alternate operation condition aft engine off-premises station is closed condition, and the slave off-premises station that connects preface automatically is an open mode; Wherein system loading Q is that outdoor main frame obtains according to indoor set capacity and the platform number opened automatically.
Said setting capacity Q2 is the setting capability value of main frame off-premises station, and setting capacity Q1 is the setting capability value of slave off-premises station, and the capacity of setting Q1 is greater than the capacity of setting Q2.
Said alternate operation condition is that indoor set reaches the design temperature requirement, and off-premises station is shut down and capacity suitable, and off-premises station on the air conditioner main body and frequency-changeable compressor be control by turns automatically.
The present invention adopts full frequency-changeable compressor control and off-premises station control by turns automatically by turns; Realize system loading within the specific limits; When the power of unit is exported outside according to the accurate control room of actual power demand status of interior machine; Use the outer machine and the frequency-changeable compressor thereof of unit by turns, thereby improve the service life of multi-connected air conditioner off-premises station and unit.And it has advantages of simple, control simple and flexible, with low cost and be convenient to the characteristics of processing; Simultaneously need not increase extras; Not only can be according to the power output of unit outside the effective control room of actual power demand status of indoor set; Multi-connected air conditioning system when little load freezes or heats, can be run well, the service life that can improve multi-connected air conditioner off-premises station and unit greatly simultaneously.
Description of drawings
Fig. 1 is the control flow block diagram of one embodiment of the invention.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further described.
Referring to Fig. 1, the control method of this VRF Air Conditioning System comprises the air conditioner main body that the off-premises station that is connected in parallel more than two and indoor set constitute.Indoor set is made up of indoor set C (5), indoor set D (6), indoor set E (7) and indoor set F (8).Off-premises station is made up of main frame off-premises station and slave off-premises station.In the power output of accurately controlling off-premises station according to the actual power demand status of indoor set, rotate each off-premises station and frequency-changeable compressor thereof.Each off-premises station and frequency-changeable compressor thereof are according to condition realization control by turns automatically by turns, and this alternate operation condition is that indoor set reaches the design temperature requirement, and off-premises station is shut down and capacity suitable.Thereby improve the service life of multi-connected air conditioner off-premises station and indoor set, and improve reliability of products and stability.
During work, setting capacity Q2 is the setting capability value of main frame off-premises station, and setting capacity Q1 is the setting capability value of slave off-premises station.Rotating of each off-premises station and frequency-changeable compressor thereof, by accomplishing with the next stage:
Phase I, judge system loading Q whether less than the capacity of setting Q2, the main frame off-premises station is an opening, and the slave off-premises station is a closed condition; Its operation principle is: step 1) starts the main frame first frequency-changeable compressor A (1) earlier and comes the accurately power output of control off-premises station, lets power system capacity and indoor set actual power demand reach normal matching relationship.Step 2) indoor set when unlatching reaches design temperature after shutdown a period of time; When requiring off-premises station to start once more; Judge that once more whether system loading Q is less than the capacity of setting Q2; Design temperature is restarted and system loading Q is not more than setting capacity Q2 if indoor set does not reach, and then returns step 1), otherwise judges that whether system loading Q is less than the capacity of setting Q2; If open the power output that the main frame second frequency-changeable compressor A (2) comes unit outside the accurate control room, let power system capacity and indoor set actual power demand reach normal matching relationship.Step 3) reaches design temperature after shutdown a period of time once more when opening indoor set; When requiring off-premises station to start; Judge that once more whether system loading Q is less than the capacity of setting Q2; Design temperature is restarted and system loading Q is not more than setting capacity Q2 if indoor set does not reach, and then returns step 1), otherwise judges that whether system loading Q is less than the capacity of setting Q2; If open the power output that the slave first frequency-changeable compressor B (3) comes unit outside the accurate control room, let power system capacity and indoor set actual power demand reach normal matching relationship, open up to All hosts frequency-changeable compressor and slave frequency-changeable compressor.So circulation makes air conditioner main body when little load operation, and off-premises station and frequency-changeable compressor thereof can the alternate operations of mean allocation time, thus the service life of improving VRF Air Conditioning System greatly.
Second stage, judge system loading Q whether greater than the capacity of setting Q1, because the capacity of setting Q1, promptly not have the necessity of rotating greater than the capacity of setting Q2, main frame off-premises station and slave off-premises station are opening.
Phase III, judge that system loading Q is whether greater than the capacity of setting Q2; And less than the capacity of setting Q1, the main frame off-premises station is an opening, and the slave off-premises station is a closed condition; Reaching alternate operation condition aft engine off-premises station is closed condition, and the slave off-premises station that connects preface automatically is an open mode; Wherein system loading Q is that outdoor main frame obtains according to indoor set capacity and the platform number opened automatically.Its operation principle is: start the power output that the main frame off-premises station comes unit outside the accurate control room earlier, let power system capacity and indoor set actual power demand reach normal matching relationship.Reach design temperature once more after shutdown a period of time when opening indoor set, when requiring off-premises station to start, judge system loading Q2＜Q≤Q1 again.If indoor set reaches design temperature, judge load Q2＜Q≤Q1 once more, if only open the main frame off-premises station, close the slave off-premises station; Main frame off-premises station and slave off-premises station are opening if not.Reach design temperature once more after shutdown a period of time when opening indoor set; When requiring off-premises station to start; Judge that again indoor set reaches that temperature is restarted and system loading Q2＜Q≤Q1; Then start the power output that the slave off-premises station comes unit outside the accurate control room, let power system capacity and interior machine actual power demand reach normal matching relationship.So circulation, when making system loading within the specific limits, each off-premises station of VRF Air Conditioning System can turn round in turn, Average Operation Time, and then the service life of improving VRF Air Conditioning System.And it controls simple and flexible; Need not increase extras; Not only can be according to the power output of unit outside the effective control room of actual power demand status of indoor set; Multi-connected air conditioning system when little load freezes or heats, can be run well, the service life that can improve multi-connected air conditioner off-premises station and unit greatly simultaneously.
Claims (3)
1. the control method of a VRF Air Conditioning System; Comprise the air conditioner main body that the off-premises station that is connected in parallel more than two and indoor set constitute; Off-premises station comprises main frame off-premises station and slave off-premises station, it is characterized in that accurately controlling according to the actual power demand status of indoor set the power output of off-premises station; Rotating of each off-premises station and frequency-changeable compressor thereof, by accomplishing with the next stage:
Phase I, judge system loading Q whether less than the capacity of setting Q2, the main frame off-premises station is an opening, and the slave off-premises station is a closed condition;
Second stage, judge system loading Q whether greater than the capacity of setting Q1, main frame off-premises station and slave off-premises station are opening;
Phase III, judge that system loading Q is whether greater than the capacity of setting Q2; And less than the capacity of setting Q1, the main frame off-premises station is an opening, and the slave off-premises station is a closed condition; Reaching alternate operation condition aft engine off-premises station is closed condition, and the slave off-premises station that connects preface automatically is an open mode; Wherein system loading Q is that outdoor main frame obtains according to indoor set capacity and the platform number opened automatically.
2. the control method of VRF Air Conditioning System according to claim 1 is characterized in that said setting capacity Q2 is the setting capability value of main frame off-premises station, and setting capacity Q1 is the setting capability value of slave off-premises station, and the capacity of setting Q1 is greater than the capacity of setting Q2.
3. the control method of VRF Air Conditioning System according to claim 1 and 2; It is characterized in that said alternate operation condition is that indoor set reaches the design temperature requirement; Off-premises station is shut down and capacity suitable, and off-premises station on the air conditioner main body and frequency-changeable compressor be control by turns automatically.
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| CN201210032848.3A CN102538144B (en) | 2012-02-14 | 2012-02-14 | Multi-connected air-conditioning unit control method |
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| CN201210032848.3A CN102538144B (en) | 2012-02-14 | 2012-02-14 | Multi-connected air-conditioning unit control method |
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| CN104296308A (en) * | 2013-07-17 | 2015-01-21 | 广东美的暖通设备有限公司 | Prompting method and system of multi-online small load running and multi-online air conditioner |
| CN104807128A (en) * | 2014-01-23 | 2015-07-29 | 珠海格力电器股份有限公司 | Method and system for rotating air conditioner modules |
| CN105571070A (en) * | 2016-01-04 | 2016-05-11 | 广东美的暖通设备有限公司 | Control method and control device for air-conditioner indoor unit |
| CN106352493A (en) * | 2016-10-10 | 2017-01-25 | 珠海格力电器股份有限公司 | Small-load operation start-stop control method of air conditioning compressor, air conditioning compressor and air conditioner |
| CN107166562A (en) * | 2017-04-21 | 2017-09-15 | 珠海格力电器股份有限公司 | A kind of combined air conditioners and its adjustment method and device |
| CN108036559A (en) * | 2018-01-25 | 2018-05-15 | 天津商业大学 | Suitable for the control method and control device of full frequency-changeable compressor Parallel sets |
| CN108917130A (en) * | 2018-07-24 | 2018-11-30 | 南京天加环境科技有限公司 | A kind of energy-efficient multi-connected machine control method in parallel |
| CN110081554A (en) * | 2019-05-07 | 2019-08-02 | 珠海格力电器股份有限公司 | The control method and device of multi-online air-conditioning system |
| CN110131845A (en) * | 2019-05-22 | 2019-08-16 | 广东美的暖通设备有限公司 | A kind of air conditioner and its control method, computer readable storage medium |
| CN110500706A (en) * | 2019-08-26 | 2019-11-26 | 珠海格力电器股份有限公司 | Air-conditioning fault handling method and device |
| CN110686366A (en) * | 2019-10-16 | 2020-01-14 | 广东美的暖通设备有限公司 | Air conditioner control method and device and computer readable storage medium |
| CN111503843A (en) * | 2020-04-30 | 2020-08-07 | 广东美的制冷设备有限公司 | Air conditioner control method and device and multi-connected air conditioning system |
| CN113124548A (en) * | 2021-04-13 | 2021-07-16 | 青岛海信日立空调系统有限公司 | Multi-split air conditioning system |
| CN113137658A (en) * | 2020-01-19 | 2021-07-20 | 青岛海尔空调电子有限公司 | Control method of multi-connected air conditioning unit |
| CN113654201A (en) * | 2021-08-10 | 2021-11-16 | 青岛海信日立空调系统有限公司 | Central air-conditioning control system |
| WO2021228023A1 (en) * | 2020-07-01 | 2021-11-18 | 青岛海尔空调电子有限公司 | Energy-saving operation method for air-conditioning unit |
| CN113739345A (en) * | 2021-09-24 | 2021-12-03 | 广东美的白色家电技术创新中心有限公司 | Oil return control method, device, equipment and storage medium |
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| CN104296308B (en) * | 2013-07-17 | 2017-03-08 | 广东美的暖通设备有限公司 | The reminding method of multi-connected machine light running, prompt system and multi-online air-conditioning system |
| CN104296308A (en) * | 2013-07-17 | 2015-01-21 | 广东美的暖通设备有限公司 | Prompting method and system of multi-online small load running and multi-online air conditioner |
| CN104807128A (en) * | 2014-01-23 | 2015-07-29 | 珠海格力电器股份有限公司 | Method and system for rotating air conditioner modules |
| CN104807128B (en) * | 2014-01-23 | 2017-07-04 | 珠海格力电器股份有限公司 | The method and system of Climate Control Module rotation |
| CN105571070A (en) * | 2016-01-04 | 2016-05-11 | 广东美的暖通设备有限公司 | Control method and control device for air-conditioner indoor unit |
| CN106352493B (en) * | 2016-10-10 | 2019-01-11 | 珠海格力电器股份有限公司 | Compressor of air conditioner Smaller load runs start-up and shut-down control method, compressor of air conditioner and air conditioner |
| CN106352493A (en) * | 2016-10-10 | 2017-01-25 | 珠海格力电器股份有限公司 | Small-load operation start-stop control method of air conditioning compressor, air conditioning compressor and air conditioner |
| CN107166562B (en) * | 2017-04-21 | 2019-10-01 | 珠海格力电器股份有限公司 | A kind of combined air conditioners and its adjustment method and device |
| CN107166562A (en) * | 2017-04-21 | 2017-09-15 | 珠海格力电器股份有限公司 | A kind of combined air conditioners and its adjustment method and device |
| CN108036559A (en) * | 2018-01-25 | 2018-05-15 | 天津商业大学 | Suitable for the control method and control device of full frequency-changeable compressor Parallel sets |
| CN108036559B (en) * | 2018-01-25 | 2023-04-28 | 天津商业大学 | Control method and control device suitable for parallel unit of full-variable-frequency compressor |
| CN108917130A (en) * | 2018-07-24 | 2018-11-30 | 南京天加环境科技有限公司 | A kind of energy-efficient multi-connected machine control method in parallel |
| CN110081554B (en) * | 2019-05-07 | 2020-12-25 | 珠海格力电器股份有限公司 | Control method and device of multi-split air conditioning system |
| CN110081554A (en) * | 2019-05-07 | 2019-08-02 | 珠海格力电器股份有限公司 | The control method and device of multi-online air-conditioning system |
| CN110131845A (en) * | 2019-05-22 | 2019-08-16 | 广东美的暖通设备有限公司 | A kind of air conditioner and its control method, computer readable storage medium |
| CN110131845B (en) * | 2019-05-22 | 2021-03-30 | 广东美的暖通设备有限公司 | Air conditioner, control method thereof and computer readable storage medium |
| CN110500706A (en) * | 2019-08-26 | 2019-11-26 | 珠海格力电器股份有限公司 | Air-conditioning fault handling method and device |
| CN110686366A (en) * | 2019-10-16 | 2020-01-14 | 广东美的暖通设备有限公司 | Air conditioner control method and device and computer readable storage medium |
| CN110686366B (en) * | 2019-10-16 | 2021-02-09 | 广东美的暖通设备有限公司 | Air conditioner control method and device and computer readable storage medium |
| CN113137658A (en) * | 2020-01-19 | 2021-07-20 | 青岛海尔空调电子有限公司 | Control method of multi-connected air conditioning unit |
| CN113137658B (en) * | 2020-01-19 | 2022-09-16 | 青岛海尔空调电子有限公司 | Control method of multi-connected air conditioning unit |
| CN111503843A (en) * | 2020-04-30 | 2020-08-07 | 广东美的制冷设备有限公司 | Air conditioner control method and device and multi-connected air conditioning system |
| WO2021228023A1 (en) * | 2020-07-01 | 2021-11-18 | 青岛海尔空调电子有限公司 | Energy-saving operation method for air-conditioning unit |
| CN113124548A (en) * | 2021-04-13 | 2021-07-16 | 青岛海信日立空调系统有限公司 | Multi-split air conditioning system |
| CN113654201A (en) * | 2021-08-10 | 2021-11-16 | 青岛海信日立空调系统有限公司 | Central air-conditioning control system |
| CN113739345A (en) * | 2021-09-24 | 2021-12-03 | 广东美的白色家电技术创新中心有限公司 | Oil return control method, device, equipment and storage medium |
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