CN104776659A - Multi-split air conditioner refrigerant balancing control method and air conditioning system for achieving same - Google Patents
Multi-split air conditioner refrigerant balancing control method and air conditioning system for achieving same Download PDFInfo
- Publication number
- CN104776659A CN104776659A CN201510176303.3A CN201510176303A CN104776659A CN 104776659 A CN104776659 A CN 104776659A CN 201510176303 A CN201510176303 A CN 201510176303A CN 104776659 A CN104776659 A CN 104776659A
- Authority
- CN
- China
- Prior art keywords
- cold
- producing medium
- bias current
- value
- compressor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000004378 air conditioning Methods 0.000 title claims abstract description 18
- 239000003507 refrigerant Substances 0.000 title abstract description 15
- 239000012530 fluid Substances 0.000 claims abstract description 27
- 239000007788 liquid Substances 0.000 claims description 18
- 230000001105 regulatory effect Effects 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 6
- 238000004148 unit process Methods 0.000 claims description 5
- 238000005057 refrigeration Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention relates to a multi-split air conditioner refrigerant balancing control method and an air conditioning system for achieving the same. The technical scheme is that the multi-split air conditioner refrigerant balancing control method includes as follows: detecting refrigerant balancing characteristic value of each outdoor unit module unit; comparing the detected refrigerant balancing characteristic values and judging whether refrigerants have bias currents, if so, adjusting the work frequency of a compressor or adjusting the opening of a throttle valve located between a high pressure fluid reservoir and a heat exchanger to achieve refrigerant balancing adjustment. Correspondingly, the invention further provides the air conditioning system for achieving the multi-split air conditioner refrigerant balancing control method. According to the multi-split air conditioner refrigerant balancing control method and the air conditioning system for achieving the same, real-time monitoring on the refrigerant balancing state is achieved by detecting the refrigerant balancing characteristic value of each outdoor unit module unit, and the automatic adjustment can be carried out when the refrigerants have the bias currents, so refrigerant balance of the whole air conditioning system is ensured, energy efficiency can be improved and the whole air conditioning system can operate safely and reliably.
Description
Technical field
The invention belongs to field of air conditioning, relate to the control method of a kind of multi-connected machine cold-producing medium balance, and a kind of air-conditioning system realizing the method.
Background technology
Within air-conditioning systems, connected machine is widely used.And in Practical Project, in order to reduce consumptive material and construction volume, the form of connected machine many employings multimode combination is installed, domestic main flow multi-connected machine manufacturer can adopt at most four module to carry out Combination Design.In running, due to the impact of the not equal factor of installation pipeline and module rate of load condensate, the low pressure difference of the bias current of easy generation cold-producing medium and formation module is larger, the lower module of low pressure can cause the problems such as system availability is not high, effect is bad, compressor exhaust temperature is higher due to flow of refrigerant quantity not sufficient, and the module that low pressure is higher may cause compressor to return the problems such as liquid thus influential system safe and reliable operation because refrigerant flow is bigger than normal.
Summary of the invention
Technical problem to be solved by this invention is: the control method providing a kind of multi-connected machine cold-producing medium to balance, and can improve efficiency, and make system cloud gray model safe and reliable.
Adaptably, another technical problem to be solved by this invention is: provide one to improve efficiency, and the air-conditioning system making system cloud gray model safe and reliable.
For the control method of multi-connected machine cold-producing medium balance, the technical solution adopted in the present invention is, step is:
A, detect the cold-producing medium balance characteristics value of each outdoor unit modules unit, described cold-producing medium balance characteristics value is the force value of high pressure fluid reservoir, or be the force value of low-pressure liquid storing tank, or be the middle part coil temperature of heat exchanger, or be the delivery temperature of compressor, or be the suction temperature of compressor;
B, compare and detect the cold-producing medium balance characteristics value that obtains, judge cold-producing medium whether bias current, if bias current, enter step C;
The decision procedure of cold-producing medium whether bias current is: compared by the mean value of the cold-producing medium balance characteristics value of the cold-producing medium balance characteristics value recorded and each running unit, when its difference is greater than the standard value preset, be then judged to be bias current;
Cold-producing medium whether bias current decision procedure or be: the maximum of the cold-producing medium balance characteristics value recorded and the minimum of a value of cold-producing medium balance characteristics value are compared, when its difference is greater than the standard value preset, are then judged to be bias current;
C, by regulating the operating frequency of compressor, or regulating the throttle valve opening between high pressure fluid reservoir, heat exchanger, realizing the adjustment of cold-producing medium balance.
Further: before implementation step B, detect the running time of multiple on-line system from start, when being greater than the standard value preset when running, then carry out the judgement of cold-producing medium whether bias current.Running time, long enough, can guarantee the accuracy detecting data.
Further: heating in the course of work, the cold-producing medium balance characteristics value described in steps A is the force value of low-pressure liquid storing tank;
The decision procedure of the whether bias current of cold-producing medium described in step B is: the maximum of the cold-producing medium balance characteristics value recorded and the minimum of a value of cold-producing medium balance characteristics value are compared, when its difference is greater than the standard value preset, be then judged to be bias current;
By regulating the throttle valve opening between high pressure fluid reservoir, heat exchanger in step C, realize the adjustment of cold-producing medium balance.
Further: in refrigeration work process, the cold-producing medium balance characteristics value described in steps A is the force value of high pressure fluid reservoir;
The decision procedure of the whether bias current of cold-producing medium described in step B is: the maximum of the cold-producing medium balance characteristics value recorded and the minimum of a value of cold-producing medium balance characteristics value are compared, when its difference is greater than the standard value preset, be then judged to be bias current;
By regulating the operating frequency of compressor in step C, realize the adjustment of cold-producing medium balance.
For air-conditioning system, the technical solution adopted in the present invention is: the multiple outdoor unit modules unit comprising control system and be arranged in parallel, outdoor unit modules unit comprises low-pressure liquid storing tank, compressor, cross valve, heat exchanger, high pressure fluid reservoir, control system is provided with the sensor for detecting cold-producing medium balance characteristics value, control system has the microprocessing unit for judging cold-producing medium whether bias current, compressor has frequency-variable controller, is provided with choke valve between high pressure fluid reservoir, heat exchanger.For frequency-variable controller and choke valve, according to the regulative mode of cold-producing medium balance in step C, one can be selected and arranges, or arrange simultaneously; Sensor according to the difference detecting cold-producing medium balance characteristics value, the relevant position in machine modular unit disposed in the outdoor.In the course of work, the detection data of sensor are transferred to control system, control the operating frequency of compressor or the aperture of choke valve after microprocessing unit process.
The invention has the beneficial effects as follows: by detecting the cold-producing medium balance characteristics value of each outdoor unit modules unit, realize the Real-Time Monitoring of cold-producing medium equilibrium condition, when there is bias current in cold-producing medium, can automatically regulate, ensure that the cold-producing medium balance of whole multiple on-line system, can efficiency be improved, and make system cloud gray model safe and reliable.
Accompanying drawing explanation
Fig. 1 is air-conditioning system structural representation of the present invention;
Description of symbols in figure: 1-low-pressure liquid storing tank, 2-compressor, 3-cross valve, 4-heat exchanger, 5-high pressure fluid reservoir, 6-choke valve.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described.
The present invention heats preferred embodiment during work:
Step of the present invention is:
A, detect the force value of the low-pressure liquid storing tank of each outdoor unit modules unit; The low-pressure liquid storing tank force value recording module a is maximum, and force value is that the low-pressure liquid storing tank force value of c, module b is minimum, and force value is d, and all the other run the low-pressure liquid storing tank force value of module all between c and d;
B, detect the running time of multiple on-line system from start, when being greater than the standard value T preset when running, carry out the judgement of cold-producing medium whether bias current;
The decision procedure of described cold-producing medium whether bias current is: the maximum c of the low-pressure liquid storing tank force value recorded and the minimum of a value d of low-pressure liquid storing tank force value are compared, when its difference is greater than the standard value e preset, namely during c-d > e, then bias current is judged to be;
C, by regulating the throttle valve opening between high pressure fluid reservoir, heat exchanger, realize the adjustment of cold-producing medium balance.Choke valve can adopt electric expansion valve, and regulative mode is: the electric expansion valve opening large module b, and the electric expansion valve of module a remains unchanged or turns down.
Preferred embodiment during refrigeration work of the present invention:
Step of the present invention is:
A, detect the force value of the high pressure fluid reservoir of each outdoor unit modules unit; The high pressure fluid reservoir force value recording module a is maximum, and force value is that the high pressure fluid reservoir force value of c, module b is minimum, and force value is d, and all the other run the high pressure fluid reservoir force value of module all between c and d;
B, detect the running time of multiple on-line system from start, when being greater than the standard value T preset when running, carry out the judgement of cold-producing medium whether bias current;
The decision procedure of described cold-producing medium whether bias current is: the maximum c of the high pressure fluid reservoir force value recorded and the minimum of a value d of high pressure fluid reservoir force value are compared, when its difference is greater than the standard value e preset, namely during c-d > e, then bias current is judged to be;
C, by regulating the operating frequency of compressor, controlling compressor rotary speed, realizing the adjustment of cold-producing medium balance.Regulative mode is: the compressor frequency of module a can not rise; The compressor frequency of module b rises.
Air-conditioning system embodiment:
Air-conditioning system structure of the present invention as shown in Figure 1, the multiple outdoor unit modules unit comprising control system and be arranged in parallel, outdoor unit modules unit comprises low-pressure liquid storing tank 1, compressor 2, cross valve 3, heat exchanger 4, high pressure fluid reservoir 5, control system is provided with the sensor for detecting cold-producing medium balance characteristics value, the cold-producing medium balance characteristics value of categories of sensors and detection adapts, then the relevant position in machine modular unit disposed in the outdoor, in the present embodiment, what adopt is arrange pressure sensor respectively at low-pressure liquid storing tank 1 and high pressure fluid reservoir 5, control system has the microprocessing unit for judging cold-producing medium whether bias current, compressor 2 has frequency-variable controller, high pressure fluid reservoir 5, choke valve 6 is provided with between heat exchanger 4, the detection data of sensor are made to be transferred to control system, the operating frequency of compressor 2 or the aperture of choke valve 6 is controlled after microprocessing unit process.
Claims (7)
1. the control method of multi-connected machine cold-producing medium balance, it is characterized in that, step is:
A, detect the cold-producing medium balance characteristics value of each outdoor unit modules unit, described cold-producing medium balance characteristics value is the force value of high pressure fluid reservoir, or be the force value of low-pressure liquid storing tank, or be the middle part coil temperature of heat exchanger, or be the delivery temperature of compressor, or be the suction temperature of compressor;
B, compare and detect the cold-producing medium balance characteristics value that obtains, judge cold-producing medium whether bias current, if bias current, enter step C;
The decision procedure of described cold-producing medium whether bias current is: compared by the mean value of the cold-producing medium balance characteristics value of the cold-producing medium balance characteristics value recorded and each running unit, when its difference is greater than the standard value preset, be then judged to be bias current;
Described cold-producing medium whether bias current decision procedure or be: the maximum of the cold-producing medium balance characteristics value recorded and the minimum of a value of cold-producing medium balance characteristics value are compared, when its difference is greater than the standard value preset, are then judged to be bias current;
C, by regulating the operating frequency of compressor, or regulating the throttle valve opening between high pressure fluid reservoir, heat exchanger, realizing the adjustment of cold-producing medium balance.
2. the control method of multi-connected machine cold-producing medium balance as claimed in claim 1, it is characterized in that: before implementation step B, detect the running time of multiple on-line system from start, when being greater than the standard value preset when running, then carry out the judgement of cold-producing medium whether bias current.
3. the control method of multi-connected machine cold-producing medium balance as claimed in claim 1 or 2, it is characterized in that: heating in the course of work, the cold-producing medium balance characteristics value described in steps A is the force value of low-pressure liquid storing tank;
The decision procedure of the whether bias current of cold-producing medium described in step B is: the maximum of the cold-producing medium balance characteristics value recorded and the minimum of a value of cold-producing medium balance characteristics value are compared, when its difference is greater than the standard value preset, be then judged to be bias current;
By regulating the throttle valve opening between high pressure fluid reservoir, heat exchanger in step C, realize the adjustment of cold-producing medium balance.
4. the control method of multi-connected machine cold-producing medium balance as claimed in claim 1 or 2, it is characterized in that: in refrigeration work process, the cold-producing medium balance characteristics value described in steps A is the force value of high pressure fluid reservoir;
The decision procedure of the whether bias current of cold-producing medium described in step B is: the maximum of the cold-producing medium balance characteristics value recorded and the minimum of a value of cold-producing medium balance characteristics value are compared, when its difference is greater than the standard value preset, be then judged to be bias current;
By regulating the operating frequency of compressor in step C, realize the adjustment of cold-producing medium balance.
5. realize the air-conditioning system of control method according to any one of Claims 1 to 4, the multiple outdoor unit modules unit comprising control system and be arranged in parallel, described outdoor unit modules unit comprises low-pressure liquid storing tank (1), compressor (2), cross valve (3), heat exchanger (4), high pressure fluid reservoir (5), it is characterized in that: described control system is provided with the sensor for detecting cold-producing medium balance characteristics value, described control system has the microprocessing unit for judging cold-producing medium whether bias current, described compressor (2) has frequency-variable controller, the detection data of sensor are made to be transferred to control system, the operating frequency of compressor (2) is controlled after microprocessing unit process.
6. realize the air-conditioning system of control method according to any one of Claims 1 to 4, the multiple outdoor unit modules unit comprising control system and be arranged in parallel, described outdoor unit modules unit comprises low-pressure liquid storing tank (1), compressor (2), cross valve (3), heat exchanger (4), high pressure fluid reservoir (5), it is characterized in that: described control system is provided with the sensor for detecting cold-producing medium balance characteristics value, described control system has the microprocessing unit for judging cold-producing medium whether bias current, described high pressure fluid reservoir (5), choke valve (6) is provided with between heat exchanger (4), the detection data of sensor are made to be transferred to control system, the aperture of choke valve (6) is controlled after microprocessing unit process.
7. realize the air-conditioning system of control method according to any one of Claims 1 to 4, the multiple outdoor unit modules unit comprising control system and be arranged in parallel, described outdoor unit modules unit comprises low-pressure liquid storing tank (1), compressor (2), cross valve (3), heat exchanger (4), high pressure fluid reservoir (5), it is characterized in that: described control system is provided with the sensor for detecting cold-producing medium balance characteristics value, described control system has the microprocessing unit for judging cold-producing medium whether bias current, described compressor (2) has frequency-variable controller, described high pressure fluid reservoir (5), choke valve (6) is provided with between heat exchanger (4), the detection data of sensor are made to be transferred to control system, the operating frequency of compressor (2) or the aperture of choke valve (6) is controlled after microprocessing unit process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510176303.3A CN104776659A (en) | 2015-04-14 | 2015-04-14 | Multi-split air conditioner refrigerant balancing control method and air conditioning system for achieving same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510176303.3A CN104776659A (en) | 2015-04-14 | 2015-04-14 | Multi-split air conditioner refrigerant balancing control method and air conditioning system for achieving same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104776659A true CN104776659A (en) | 2015-07-15 |
Family
ID=53618281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510176303.3A Pending CN104776659A (en) | 2015-04-14 | 2015-04-14 | Multi-split air conditioner refrigerant balancing control method and air conditioning system for achieving same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104776659A (en) |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105299827A (en) * | 2015-10-10 | 2016-02-03 | 珠海格力电器股份有限公司 | Air conditioning system and control method thereof |
| CN107461896A (en) * | 2017-09-18 | 2017-12-12 | 广东美的暖通设备有限公司 | Control method, system and the computer-readable recording medium of multi-connected air conditioner |
| CN107490223A (en) * | 2017-09-18 | 2017-12-19 | 广东美的暖通设备有限公司 | Control method, system and the computer-readable recording medium of multi-connected air conditioner |
| CN107621047A (en) * | 2017-08-15 | 2018-01-23 | 珠海格力电器股份有限公司 | Control method and device of air conditioning unit |
| CN107655166A (en) * | 2017-09-18 | 2018-02-02 | 广东美的暖通设备有限公司 | Control method, system and the computer-readable recording medium of multi-connected air conditioner |
| CN107702268A (en) * | 2017-09-07 | 2018-02-16 | 广东美的暖通设备有限公司 | The valve body control method and multi-connected air conditioner of multi-connected air conditioner |
| CN107726568A (en) * | 2017-10-31 | 2018-02-23 | 广东美的暖通设备有限公司 | The control method of air conditioner, the control system of air conditioner and air conditioner |
| CN109297155A (en) * | 2018-11-29 | 2019-02-01 | 宁波奥克斯电气股份有限公司 | Compressor protection method, device and air conditioner |
| CN109708272A (en) * | 2018-12-29 | 2019-05-03 | 广东美的暖通设备有限公司 | The control method of the electric expansion valve of outer machine in parallel |
| CN109708271A (en) * | 2018-12-29 | 2019-05-03 | 广东美的暖通设备有限公司 | The control method and its device of outer machine system in parallel |
| CN111271855A (en) * | 2020-03-24 | 2020-06-12 | 珠海格力电器股份有限公司 | Method for improving bias flow of modular multi-split air conditioning unit and air conditioning unit |
| CN113260823A (en) * | 2018-11-20 | 2021-08-13 | 里姆制造公司 | Expansion valve with selectable operating modes |
| US11137157B2 (en) | 2017-09-18 | 2021-10-05 | Gd Midea Heating & Ventilating Equipment Co., Ltd. | Method for controlling multi-split air conditioner, multi-split air conditioner system, and computer-readable storage medium |
| CN115406072A (en) * | 2021-05-27 | 2022-11-29 | 广东美的暖通设备有限公司 | Control method of multi-split air conditioning system and related product |
| CN116592482A (en) * | 2023-05-08 | 2023-08-15 | 珠海格力电器股份有限公司 | Multi-connection control method, multi-connection and storage medium |
| WO2025025802A1 (en) * | 2023-07-28 | 2025-02-06 | 珠海格力电器股份有限公司 | Modular air conditioner control method and apparatus, modular air conditioner, and storage medium |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002228280A (en) * | 2001-01-29 | 2002-08-14 | Sanyo Electric Co Ltd | Air conditioner |
| JP2002228277A (en) * | 2001-01-29 | 2002-08-14 | Sanyo Electric Co Ltd | Air conditioner |
| CN101535738A (en) * | 2006-12-04 | 2009-09-16 | 大金工业株式会社 | Refrigeration device |
| CN102914027A (en) * | 2012-09-20 | 2013-02-06 | 宁波奥克斯电气有限公司 | Control method for preventing refrigerant of outdoor unit from bias flowing during refrigeration of multi-split air-conditioning unit |
-
2015
- 2015-04-14 CN CN201510176303.3A patent/CN104776659A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002228280A (en) * | 2001-01-29 | 2002-08-14 | Sanyo Electric Co Ltd | Air conditioner |
| JP2002228277A (en) * | 2001-01-29 | 2002-08-14 | Sanyo Electric Co Ltd | Air conditioner |
| CN101535738A (en) * | 2006-12-04 | 2009-09-16 | 大金工业株式会社 | Refrigeration device |
| CN102914027A (en) * | 2012-09-20 | 2013-02-06 | 宁波奥克斯电气有限公司 | Control method for preventing refrigerant of outdoor unit from bias flowing during refrigeration of multi-split air-conditioning unit |
Cited By (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105299827A (en) * | 2015-10-10 | 2016-02-03 | 珠海格力电器股份有限公司 | Air conditioning system and control method thereof |
| CN105299827B (en) * | 2015-10-10 | 2018-11-02 | 珠海格力电器股份有限公司 | Air conditioning system and control method thereof |
| CN107621047A (en) * | 2017-08-15 | 2018-01-23 | 珠海格力电器股份有限公司 | Control method and device of air conditioning unit |
| CN107702268A (en) * | 2017-09-07 | 2018-02-16 | 广东美的暖通设备有限公司 | The valve body control method and multi-connected air conditioner of multi-connected air conditioner |
| US11137157B2 (en) | 2017-09-18 | 2021-10-05 | Gd Midea Heating & Ventilating Equipment Co., Ltd. | Method for controlling multi-split air conditioner, multi-split air conditioner system, and computer-readable storage medium |
| CN107490223A (en) * | 2017-09-18 | 2017-12-19 | 广东美的暖通设备有限公司 | Control method, system and the computer-readable recording medium of multi-connected air conditioner |
| CN107655166A (en) * | 2017-09-18 | 2018-02-02 | 广东美的暖通设备有限公司 | Control method, system and the computer-readable recording medium of multi-connected air conditioner |
| CN107490223B (en) * | 2017-09-18 | 2019-11-22 | 广东美的暖通设备有限公司 | Control method, system and the computer readable storage medium of multi-connected air conditioner |
| CN107461896B (en) * | 2017-09-18 | 2020-04-14 | 广东美的暖通设备有限公司 | Control method and system of multi-connected air conditioner and computer readable storage medium |
| CN107655166B (en) * | 2017-09-18 | 2020-05-22 | 广东美的暖通设备有限公司 | Control method and system of multi-connected air conditioner and computer readable storage medium |
| CN107461896A (en) * | 2017-09-18 | 2017-12-12 | 广东美的暖通设备有限公司 | Control method, system and the computer-readable recording medium of multi-connected air conditioner |
| CN107726568A (en) * | 2017-10-31 | 2018-02-23 | 广东美的暖通设备有限公司 | The control method of air conditioner, the control system of air conditioner and air conditioner |
| CN107726568B (en) * | 2017-10-31 | 2020-08-25 | 广东美的暖通设备有限公司 | Control method and system of air conditioner and air conditioner |
| CN113260823A (en) * | 2018-11-20 | 2021-08-13 | 里姆制造公司 | Expansion valve with selectable operating modes |
| CN113260823B (en) * | 2018-11-20 | 2023-02-17 | 里姆制造公司 | Expansion valve with selectable operating modes |
| CN109297155A (en) * | 2018-11-29 | 2019-02-01 | 宁波奥克斯电气股份有限公司 | Compressor protection method, device and air conditioner |
| CN109708272A (en) * | 2018-12-29 | 2019-05-03 | 广东美的暖通设备有限公司 | The control method of the electric expansion valve of outer machine in parallel |
| CN109708271A (en) * | 2018-12-29 | 2019-05-03 | 广东美的暖通设备有限公司 | The control method and its device of outer machine system in parallel |
| CN111271855B (en) * | 2020-03-24 | 2021-10-01 | 格力电器（杭州）有限公司 | Method for improving bias flow of modular multi-split air conditioning unit and air conditioning unit |
| CN111271855A (en) * | 2020-03-24 | 2020-06-12 | 珠海格力电器股份有限公司 | Method for improving bias flow of modular multi-split air conditioning unit and air conditioning unit |
| CN115406072A (en) * | 2021-05-27 | 2022-11-29 | 广东美的暖通设备有限公司 | Control method of multi-split air conditioning system and related product |
| CN115406072B (en) * | 2021-05-27 | 2025-07-15 | 广东美的暖通设备有限公司 | Control method and related products of multi-split air conditioning system |
| CN116592482A (en) * | 2023-05-08 | 2023-08-15 | 珠海格力电器股份有限公司 | Multi-connection control method, multi-connection and storage medium |
| WO2025025802A1 (en) * | 2023-07-28 | 2025-02-06 | 珠海格力电器股份有限公司 | Modular air conditioner control method and apparatus, modular air conditioner, and storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104776659A (en) | Multi-split air conditioner refrigerant balancing control method and air conditioning system for achieving same | |
| CN106871355B (en) | The control method and system of heat pump type air conditioner, the auxiliary heat of heat pump type air conditioner electricity | |
| CN105004116B (en) | The coolant injection control method of air-conditioner outdoor unit, air-conditioning | |
| CN107504729B (en) | Method, device and storage medium for controlling expansion valve of enhanced vapor injection system | |
| US20120291984A1 (en) | Kind Of Air Conditioner System And Control Method Of Its Condensing Fan | |
| CN102538144B (en) | Multi-connected air-conditioning unit control method | |
| US20160265794A1 (en) | Heat Pump Water Heater and Control Method Thereof | |
| CN110895020B (en) | Refrigerant leakage detection method and air conditioner | |
| CN102705985B (en) | Heat pump water heater system and method for controlling wind speed thereof | |
| CN108151254B (en) | Air conditioner, operation control method, and computer-readable storage medium | |
| CN104482638A (en) | Air conditioner and fault detection method for electronic expansion valve of air conditioner | |
| CN202392954U (en) | Air conditioner | |
| CN104406251A (en) | Dehumidification method for air conditioner and air conditioner | |
| CN109631388A (en) | A kind of air-conditioning heating four-way valve commutation exception control method, apparatus and air conditioner | |
| CN103743063A (en) | Method of controlling electronic expansion valve during refrigeration of air conditioner | |
| CN104215001A (en) | Double-stage compressor air-conditioner system and control method thereof | |
| CN105299841A (en) | Multi-split air conditioning system and fault detection method of heat exchange valve bodies of outdoor heat exchanger of multi-split air conditioning system | |
| CN110895026A (en) | Air conditioner refrigerant leakage detection method and air conditioner using same | |
| CN108489011B (en) | Operation control method and device, air-conditioning water machine system and storage medium | |
| CN103900253A (en) | Instant air energy heat-pump water heater and control method thereof | |
| CN106288520A (en) | Compressor oil return control device and method and air conditioner | |
| CN108050719B (en) | Natural cooling system for calculating capacity of refrigerant pump based on temperature difference and control method thereof | |
| CN114353249A (en) | Control method and device for multi-split air conditioner and multi-split air conditioner | |
| CN110375422A (en) | Control method, system and the apparatus of air conditioning of air-conditioning | |
| CN111520875B (en) | A control method and system for one-drag multi-air conditioner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150715 |
|
| RJ01 | Rejection of invention patent application after publication |