CN105890118B - The method and its unit of mechanism thermal effect in a kind of promotion multi-connected machine - Google Patents
The method and its unit of mechanism thermal effect in a kind of promotion multi-connected machine Download PDFInfo
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- CN105890118B CN105890118B CN201610284353.8A CN201610284353A CN105890118B CN 105890118 B CN105890118 B CN 105890118B CN 201610284353 A CN201610284353 A CN 201610284353A CN 105890118 B CN105890118 B CN 105890118B
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- expansion valve
- indoor unit
- aperture
- unit
- compressor
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
-
- 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
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2513—Expansion valves
Abstract
The invention discloses the method and its unit of mechanism thermal effect in a kind of promotion multi-connected machine, step 1：Wherein, indoor units（5）In part indoor unit be in heating, part indoor unit shut down, run the t1 times；Step 2：Machine electric expansion valve outside sensing chamber（4）Aperture, obtain outdoor heat exchange machine（3）Saturation temperature value T1, detect compressor（1）Delivery temperature T2；Step 3：Pass through the outdoor unit electric expansion valve in step 2（4）Aperture, saturation temperature value T1 and delivery temperature T2；That delimit the indoor unit of a heating mode lack refrigerant condition, meets the condition and then enters step four, otherwise redirects five；Step 4：Increase the electronic expansion valve of indoor unit for shutting down indoor unit（6）Aperture, jump to step 2；Step 5：Maintain the electronic expansion valve of indoor unit of the shutdown indoor unit after increasing（6）Aperture.It is an advantage of the invention that ensure heating effect, while required energy consumption is relatively low.
Description
Technical field
The present invention relates to the methods and its unit of mechanism thermal effect in a kind of promotion multi-connected machine.
Background technology
Air-conditioning as refrigeration or heating equipment oneself through become people life a part, improve people life it is comfortable
Property, but the operation of air-conditioning needs to expend more electric energy.The period of the operation of air-conditioning is also longer, runs 10 years under normal circumstances
It is what there is no problem.Currently, multi-gang air-conditioner in the market, for refrigerant Biased flow phenomenon, uses new especially in heating
Technical solution, can thus improve the heating effect of system.
Such as application No. is the Chinese patent of CN201110255060.4, patent name is：When VRF Air Conditioning System heats
Prevent the control method of refrigerant bias current, a kind of control of preventing bias flow of refrigerants during heating of multi-connected air conditioning unit of the disclosure of the invention
Method processed, realization mainly comprise the following steps：The highest indoor-unit cooling-medium of temperature T0, TO measured in the middle part of indoor heat exchanger is most, TO
Minimum indoor-unit cooling-medium is minimum；The outlet temperature Tlmin of the indoor heat exchanger of the minimum indoor unit of refrigerant is measured, refrigerant is measured
The outlet temperature Tlmax of the indoor heat exchanger of most indoor units calculates the two difference △ T；Judge whether △ T are greater than or equal to 5,
It is then to increase the aperture of the interior machine electric expansion valve of the minimum indoor unit of refrigerant, by the interior electromechanics of the most indoor unit of refrigerant
The aperture of sub- expansion valve reduces；At regular intervals, it repeats the above steps, until shutting down.
But above-mentioned technical solution is only simply by the refrigerant return of the more indoor unit of refrigerant to the smaller room of refrigerant
On interior machine, the heating effect of system is improved, which can not solve the problems, such as that following situation comes out；Multi-connected air conditioner
In unit, when part indoor unit is under heating state, part indoor unit is in shutdown status, is in the indoor unit of shutdown status
It will appear a large amount of liquid storage in machine, when the refrigerant insufficient total amount of system, cause the indoor unit under heating state cold
Matchmaker's insufficient total amount, occurs that compressor exhaust temperature is excessively high, and the aperture for outdoor unit electric expansion valve occur is excessive, causes in heating
Indoor unit heating effect under state is poor, system high energy consumption on the whole.
Invention content
The technical problem to be solved by the present invention is to provide a kind of method promoting mechanism thermal effect in multi-connected machine, the control
Method, it is ensured that in the case where the total refrigerant of system is certain, ensure heating effect, while required energy consumption is relatively low.
In order to solve the above technical problems, technical solution provided by the invention is：Mechanism thermal effect in a kind of promotion multi-connected machine
Method, it include compressor, four-way valve, outdoor heat exchange machine, outdoor unit electric expansion valve and parallel connection indoor units, institute
It states and electronic expansion valve of indoor unit is installed on the output end of the indoor unit of indoor units；The output end of the compressor passes through four-way
Valve is connect with the input terminal of indoor units in parallel, the output end of the indoor units of the parallel connection, outdoor unit electric expansion valve, room
The input terminal of outer heat exchanger, four-way valve and compressor is sequentially connected, to realize refrigerant circulation；
Step 1：Wherein, the part indoor unit in indoor units is in heating mode, and part indoor unit, which is in, shuts down mould
Formula runs the t1 times；
Step 2：The aperture of machine electric expansion valve outside sensing chamber obtains the saturation temperature value T1 of outdoor heat exchange machine, detection pressure
The delivery temperature T2 of contracting machine；
Step 3：Pass through the aperture of the outdoor unit electric expansion valve in step 2, saturation temperature value T1 and delivery temperature
T2；That delimit the indoor unit of a heating mode lack refrigerant condition, if the aperture of outdoor unit electric expansion valve or exhaust temperature
The difference of degree T2 and delivery temperature T2 meets the condition and then enters step four, otherwise redirects five；
Step 4：The aperture for increasing the electronic expansion valve of indoor unit for shutting down indoor unit, jumps to step 2；
Step 5：Maintain the aperture of the electronic expansion valve of indoor unit of the shutdown indoor unit after increasing.
As an improvement, in step 4, increase the 1% of electronic expansion valve of indoor unit maximum opening according to every t2S.
As an improvement, t2 is 20-40s.
As an improvement, if the aperture or delivery temperature T2 of outdoor unit electric expansion valve and the difference of delivery temperature T2 meet
The condition then enters step four, otherwise redirect five refer to outdoor unit electric expansion valve aperture be more than outdoor unit electric expansion valve
The difference of the 60% or delivery temperature T2 and saturation temperature value T1 of maximum opening are more than 30 degrees Celsius, meet any one condition,
Four are then entered step, otherwise redirects five.
As an improvement, in step 4, increased aperture can be added up, and judge that the interior accumulated is electromechanical
Whether the aperture of sub- expansion valve is more than the 30% of the maximum opening of electronic expansion valve of indoor unit, no if more than step 5 is jumped to
Then jump procedure two.
As an improvement, in step 2, by detecting the high-pressure P of compressor operating, it is right with high-pressure P institutes to find out
The saturation temperature value T1 answered, saturation temperature value T1 are the saturation temperature value T1 of outdoor heat exchange machine.
As an improvement, t1 is 10-20 minutes.
After above method, compared with prior art, the present invention haing the following advantages：Pass through electromechanical son outside sensing chamber
The aperture of expansion valve obtains the saturation temperature value T1 of outdoor heat exchange machine, detects the delivery temperature T2 of compressor；It again will be in step 2
Outdoor unit electric expansion valve aperture, saturation temperature value T1 and delivery temperature T2；Delimit the indoor unit of a heating mode
Lack refrigerant condition, increase if meeting the condition shut down indoor unit electronic expansion valve of indoor unit aperture, increase aperture
The aperture of machine electric expansion valve outside Hou Zaiqu sensing chamber obtains the saturation temperature value T1 of outdoor heat exchange machine, detects the row of compressor
Temperature degree T2 maintains the aperture for shutting down the electronic expansion valve of indoor unit of indoor unit after being unsatisfactory for the condition of above-mentioned setting.On
The method stated is realized in the case where obtaining heating indoor unit cold medium shortage by the refrigerant in the indoor unit of shutdown status
The indoor unit under heating state is flowed back into, does not increase the total refrigerant of system, realizes and carrys out the refrigerant release of original idle
For heating, the heating efficiency of the indoor unit under heating state is helped to improve, while required energy consumption is relatively low.
The technical problem to be solved by the present invention is to provide a kind of unit, the unit, it is ensured that the certain situation of the total refrigerant of system
Under, ensure heating effect, while required energy consumption is relatively low.
In order to solve the above technical problems, technical solution provided by the invention is：A kind of unit, it includes compressor, four-way
Valve, outdoor heat exchange machine, outdoor unit electric expansion valve and the indoor units of parallel connection, the output end of the indoor unit of the indoor units
On electronic expansion valve of indoor unit is installed；The input terminal that the output end of the compressor passes through four-way valve and indoor units in parallel
Connection, output end, outdoor unit electric expansion valve, outdoor heat exchange machine, four-way valve and the compressor of the indoor units of the parallel connection
Input terminal be sequentially connected, to realize refrigerant circulation；It further includes the pressure of the high-pressure P for detecting compressor operating
Sensor, the temperature sensor being located at exhaust outlet of compressor, for outside sensing chamber the aperture of machine electric expansion valve detection dress
Set and control the controller of the aperture of electronic expansion valve of indoor unit；The input terminal of the controller respectively with pressure sensor,
Temperature sensor and detection device electrical connection, the output end of the controller are electrically connected with electronic expansion valve of indoor unit.
After using the above structure, compared with prior art, the present invention haing the following advantages：Above-mentioned unit can be outside sensing chamber
The aperture of machine electric expansion valve obtains the saturation temperature value T1 of outdoor heat exchange machine, detects the delivery temperature T2 of compressor；It again will step
Aperture, saturation temperature value T1 and the delivery temperature T2 of outdoor unit electric expansion valve in rapid two；One heating mode of delimitation
Indoor unit lacks refrigerant condition, then meets and increase electronic expansion valve of indoor unit by controller after the condition.
Description of the drawings
Fig. 1 is the overall structure diagram of the present invention.
Fig. 2 is the overall structure diagram of the unit of the present invention.
Fig. 3 is the circuit modular structure schematic diagram of the unit of the present invention.
As shown in the figure：1, compressor, 2, four-way valve, 3, outdoor heat exchange machine, 4, outdoor unit electric expansion valve, 5, indoor unit
Group, 6, electronic expansion valve of indoor unit, 7, pressure sensor, 8, temperature sensor, 9, detection device, 10, controller.
Specific implementation mode
Present invention will be described in further detail below with reference to the accompanying drawings.
As shown in attached drawing 1, attached drawing 2 and attached drawing 3, a kind of method promoting mechanism thermal effect in multi-connected machine of the present invention, it is wrapped
Include compressor 1, four-way valve 2, outdoor heat exchange machine 3, outdoor unit electric expansion valve 4 and the indoor units 5 of parallel connection, the indoor unit
Electronic expansion valve of indoor unit 6 is installed on the output end of the indoor unit of group 5；The output end of the compressor 1 by four-way valve 2 with
The input terminal connection of indoor units 5 in parallel, the output end of the indoor units 5 of the parallel connection, outdoor unit electric expansion valve 4, room
The input terminal of outer heat exchanger 3, four-way valve 2 and compressor 1 is sequentially connected, to realize refrigerant circulation；
Step 1：Wherein, the part indoor unit in indoor units 5 is in heating mode, and part indoor unit, which is in, shuts down mould
Formula, the aperture for shutting down the electronic expansion valve of indoor unit 6 of indoor unit are S, and aperture is that S refers to initial opening, runs the t1 times；
Step 2：Step 2：The aperture of machine electric expansion valve 4 outside sensing chamber obtains the saturation temperature value of outdoor heat exchange machine 3
T1 detects the delivery temperature T2 of compressor 1；
Step 3：The aperture of outdoor unit electric expansion valve 4 be more than outdoor unit electric expansion valve 4 maximum opening 60% or
The difference of person's delivery temperature T2 and saturation temperature value T1 is more than 30 degrees Celsius, meets any one condition, then enters step four, otherwise
Redirect five；
Step 4：The aperture for increasing the electronic expansion valve of indoor unit 6 for shutting down indoor unit, i.e., increase on the basis of aperture S,
Jump to step 2；
Step 5：Maintain the aperture of the electronic expansion valve of indoor unit 6 of the shutdown indoor unit after increasing.
In step 4, according to every t2S increase by 6 maximum opening of electronic expansion valve of indoor unit 1%, t2 20-40s,
The application specific implementation takes 30s.It according to a period and goes to increase in the form of one quantitative within this period and open
Degree can ensure the aperture for subsequently obtaining machine electric expansion valve 4 outside sensing chamber, obtain the saturation temperature value T1 of outdoor heat exchange machine 3,
Detect the delivery temperature T2 of compressor 1, the accuracy of these data.
In step 2, the high-pressure P run by detecting compressor 1 is found out and satisfying corresponding to high-pressure P
It is the saturation temperature value T1 of outdoor heat exchange machine 3 with temperature value T1, saturation temperature value T1.
A kind of unit of the present invention, it include compressor 1, four-way valve 2, outdoor heat exchange machine 3, outdoor unit electric expansion valve 4 with
And indoor units 5 in parallel, electronic expansion valve of indoor unit 6 is installed on the output end of the indoor unit of the indoor units 5；It is described
The output end of compressor 1, the first input end of four-way valve 2, indoor units 5 in parallel, outdoor unit electric expansion valve 4, outdoor are changed
The input terminal of heat engine 3, the second input end of four-way valve 2 and compressor 1 is sequentially connected；It is characterized in that：It further includes being used for
The pressure sensor 7 for the high-pressure P that detection compressor 1 is run, is used for the temperature sensor 8 for being located at 1 exhaust ports of compressor
The controller of the aperture of the detection device 9 of the aperture of machine electric expansion valve 4 and control electronic expansion valve of indoor unit 6 outside sensing chamber
10；The input terminal of the controller 10 is electrically connected with pressure sensor 7, temperature sensor 8 and detection device 9 respectively, described
The output end of controller 10 is electrically connected with electronic expansion valve of indoor unit 6.
Only highly preferred embodiment of the present invention is described above, but is not to be construed as limiting the scope of the invention.This
Invention is not limited only to above example, and various changes made within the protection scope of the independent claims of the invention are at this
In the protection domain of invention.
Claims (7)
1. a kind of method promoting mechanism thermal effect in multi-connected machine, it includes compressor (1), four-way valve (2), outdoor heat exchange machine
(3), outdoor unit electric expansion valve (4) and the indoor units (5) of parallel connection, the output end of the indoor unit of the indoor units (5)
On electronic expansion valve of indoor unit (6) is installed；The output end of the compressor (1) passes through four-way valve (2) and indoor unit in parallel
The input terminal of group (5) connects, output end, outdoor unit electric expansion valve (4), the outdoor heat exchange of the indoor units (5) of the parallel connection
The input terminal of machine (3), four-way valve (2) and compressor (1) is sequentially connected, to realize refrigerant circulation；It is characterized in that：Step
One：Part indoor unit in indoor units (5) is in heating mode, and part indoor unit is in shutdown mode, runs the t1 times；
Step 2：The aperture of machine electric expansion valve (4) outside sensing chamber obtains the saturation temperature value T1 of outdoor heat exchange machine (3), detection
The delivery temperature T2 of compressor (1)；
Step 3：The aperture of outdoor unit electric expansion valve (4) be more than outdoor unit electric expansion valve (4) maximum opening 60% or
The difference of person's delivery temperature T2 and saturation temperature value T1 is more than 30 degrees Celsius, meets any one condition, then enters step four, otherwise
Redirect five；
Step 4：The aperture for increasing the electronic expansion valve of indoor unit (6) for shutting down indoor unit, jumps to step 2；
Step 5：Maintain the aperture of the electronic expansion valve of indoor unit (6) of the shutdown indoor unit after increasing.
2. a kind of method promoting mechanism thermal effect in multi-connected machine according to claim 1, it is characterised in that：In step 4
In, increase the 1% of electronic expansion valve of indoor unit (6) maximum opening according to every t2S.
3. a kind of method promoting mechanism thermal effect in multi-connected machine according to claim 2, it is characterised in that：T2 is 20-
40S。
4. a kind of method promoting mechanism thermal effect in multi-connected machine according to claim 1, it is characterised in that：In step 4
In, increased aperture can be added up, and judge whether the aperture of the electronic expansion valve of indoor unit (6) accumulated is more than
The 30% of the maximum opening of electronic expansion valve of indoor unit (6), if more than step 5 is jumped to, otherwise jump procedure two.
5. a kind of method promoting mechanism thermal effect in multi-connected machine according to claim 1, it is characterised in that：In step
Two, by detect compressor (1) run high-pressure P, find out with the saturation temperature value T1 corresponding to high-pressure P, should
Saturation temperature value T1 is the saturation temperature value T1 of outdoor heat exchange machine (3).
6. a kind of method promoting mechanism thermal effect in multi-connected machine according to claim 1, it is characterised in that：T1 is 10-
20 minutes.
7. a kind of unit based on the method for mechanism thermal effect in promotion multi-connected machine described in claim 1, it is characterised in that：It
Further include the pressure sensor (7) of the high-pressure P for detecting compressor (1) operation, be located at compressor (1) exhaust ports
Temperature sensor (8), for the outer machine electric expansion valve (4) of sensing chamber aperture detection device (9) and control room in electromechanics
The controller (10) of the aperture of sub- expansion valve (6)；The input terminal of the controller (10) respectively with pressure sensor (7), temperature
Sensor (8) and detection device (9) electrical connection, output end and electronic expansion valve of indoor unit (6) electricity of the controller (10)
Connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610284353.8A CN105890118B (en) | 2016-04-29 | 2016-04-29 | The method and its unit of mechanism thermal effect in a kind of promotion multi-connected machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610284353.8A CN105890118B (en) | 2016-04-29 | 2016-04-29 | The method and its unit of mechanism thermal effect in a kind of promotion multi-connected machine |
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| CN105890118A CN105890118A (en) | 2016-08-24 |
| CN105890118B true CN105890118B (en) | 2018-10-30 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106813360B (en) * | 2017-01-17 | 2020-04-03 | 广东美的暖通设备有限公司 | Multi-split air conditioning system and cold air prevention control method and device of indoor unit of multi-split air conditioning system |
| CN109455057B (en) * | 2018-10-22 | 2020-04-28 | 珠海格力电器股份有限公司 | Air conditioner control method and device, storage medium and air conditioner |
| CN109682021B (en) * | 2018-12-13 | 2021-05-14 | 青岛海信日立空调系统有限公司 | Outdoor unit protection method and device and air conditioning system |
| CN110244143A (en) * | 2019-05-23 | 2019-09-17 | 格力电器（武汉）有限公司 | Electric expansion valve detection system |
| CN110793170B (en) * | 2019-11-13 | 2021-09-28 | 四川长虹空调有限公司 | Judgment method for insufficient refrigerant of air conditioning system and air conditioner |
| CN111023433B (en) * | 2019-12-31 | 2021-10-22 | 宁波奥克斯电气股份有限公司 | Multi-split refrigerant-lack control method and device, storage medium and air conditioning system |
| CN111947273A (en) * | 2020-08-10 | 2020-11-17 | 三菱重工海尔(青岛)空调机有限公司 | Method for recovering and stopping indoor machine refrigerant |
| CN113188230B (en) * | 2021-04-16 | 2022-06-28 | 宁波奥克斯电气股份有限公司 | Expansion valve control method and device of multi-connected air conditioner and multi-connected air conditioner |
| CN115523599A (en) * | 2022-08-30 | 2022-12-27 | 宁波奥克斯电气股份有限公司 | Control method and control device of multi-connected air conditioner, air conditioner and storage medium |
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| JP5869394B2 (en) * | 2012-03-27 | 2016-02-24 | 三機工業株式会社 | Heat medium piping system |
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| CN104266318A (en) * | 2014-10-24 | 2015-01-07 | 珠海格力电器股份有限公司 | Split type air conditioning unit control method and system |
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| CN105890118A (en) | 2016-08-24 |
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