CN106765931A - The control method of multi-gang air-conditioner - Google Patents
The control method of multi-gang air-conditioner Download PDFInfo
- Publication number
- CN106765931A CN106765931A CN201611150226.5A CN201611150226A CN106765931A CN 106765931 A CN106765931 A CN 106765931A CN 201611150226 A CN201611150226 A CN 201611150226A CN 106765931 A CN106765931 A CN 106765931A
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- indoor set
- length
- tdimin
- outdoor unit
- control
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Classifications
-
- 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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—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
- F25B13/00—Compression machines, plants or systems, with reversible cycle
-
- 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
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
-
- 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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/023—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units
- F25B2313/0233—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units in parallel arrangements
-
- 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
-
- 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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/19—Pressures
- F25B2700/193—Pressures of the compressor
- F25B2700/1933—Suction pressures
-
- 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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/19—Pressures
- F25B2700/195—Pressures of the condenser
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Atmospheric Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The present invention relates to field of air conditioning, a kind of control method of multi-gang air-conditioner is disclosed, rational multi-connected machine capability control is carried out according to different piping lengths.The present invention sum up for：The characteristic value of outdoor unit and the characteristic value of each indoor set are obtained first；It is then based on the control targe that characteristic value obtains outdoor mechanism cold, heats for obtaining, and interior mechanism cold, the control targe for heating；According to the control targe for getting refrigeration, heating, control targe of the executing agency of outdoor unit and indoor set to reach the refrigeration, heat is controlled respectively.The present invention is applied to connected air conditioner system.
Description
Technical field
The present invention relates to field of air conditioning, the more particularly to control method of multi-gang air-conditioner.
Background technology
Within air-conditioning systems, connected machine is widely used.Because actual requirement of engineering, multi-connected machine should in engineering
Pipe arrangement total length in is more and more long, and the piping length between indoor set is poor, difference in height is also increasing.The length of pipe arrangement and
The drop of indoor and outdoor machine has considerable influence for the cooling and warming performance of indoor set, is such as unable to the length that recognitive engineering installs pipe arrangement
And piping length between indoor set is poor, then refrigerating capacity difference of the multiple on-line system in different engineerings can be caused larger, with
And the larger situation of different indoor unit capability difference in same engineering.To sum up, therefore invention one kind is capable of identify that multi-connected machine is matched somebody with somebody
The technology of length of tube, and can be carried out in correct multi-connected machine capability control, and identification different chamber for different piping lengths
The length difference of machine pipe arrangement and just very necessary for the technology and control method that the length difference carries out indoor unit capability control.
The content of the invention
The technical problem to be solved in the present invention is：A kind of control method of multi-gang air-conditioner is provided, pipe range is matched somebody with somebody according to difference
Degree carries out rational multi-connected machine capability control.
To solve the above problems, the technical solution adopted by the present invention is：The control method of multi-gang air-conditioner, including following step
Suddenly：
(1) after multiple on-line system installation, whole indoor sets are in start refrigeration operational state；
(2) when the target superheat that whole electronic expansion valve of indoor unit control heat exchanger reaches user preset is spent, sensing chamber
Outer machine characteristic value T1 and each indoor set characteristic value T2i, and obtain the global feature value Tm of indoor set；
(3) the difference Td, i.e. Td=Tm-T1 of indoor set global feature value Tm and outdoor unit characteristic value T1 are calculated；Foundation is obtained
The Td for obtaining judges the overall piping length between indoor set and outdoor unit：As 8 DEG C of Td ＜, piping length is that the default first kind is long
Degree；When 8 DEG C≤Td ＜, 5 DEG C of piping lengths are default Equations of The Second Kind length；When 5 DEG C≤Td ＜, 3 DEG C of piping lengths are default the
Three class length；
(4) saturation temperature Tsatlp corresponding to selection outdoor machine system low pressure is control targe when freezing, when heating
Saturation temperature Tsathp corresponding to selection outdoor machine system high-pressure is control targe, according to the pipe arrangement that step (3) is obtained
Length, the control targe for outdoor mechanism cold is obtained as follows, heating：When piping length is first kind length, refrigeration control
Target Tsatlp processed is 1 DEG C, heats control targe Tsathp for 50 DEG C；When piping length is for Equations of The Second Kind length, refrigeration control
Target Tsatlp processed is 3 DEG C, heats control targe Tsathp for 48 DEG C；When piping length is for the 3rd class length, refrigeration control
Target Tsatlp processed is 6 DEG C, heats control targe Tsathp for 46 DEG C；
(5) compressor rotary speed of outdoor unit is adjusted, with the control targe for reaching described outdoor mechanism cold, heat；
(6) difference Tdi, i.e. Tdi=T2i-T1 between each indoor set characteristic value and outdoor unit characteristic value are calculated；Tdi is entered
Row sequence, obtains Tdimin and Tdimax, and each indoor set is marked according to following manner：For Tdimin≤Tdi ＜
The indoor set of (Tdimin+ (Tdimax-Tdimin)/3) is nearer away from outdoor unit labeled as S, i.e. pipe arrangement；For Tdimin+
(Tdimax-Tdimin) indoor set of/3≤Tdi ＜ (Tdimin+ (Tdimax-Tdimin) 2/3) is labeled as M, i.e., pipe arrangement is away from room
Outer machine is intermediate distance；Indoor set for Tdimin+ (Tdimax-Tdimin) 2/3≤Tdi ＜ Tdimax is labeled as L, that is, match somebody with somebody
Pipe is more remote away from outdoor unit；
(7) according to step (6) to the mark result of indoor set, indoor mechanism cold, the control targe for heating：It is to mark
Indoor set, during refrigeration the degree of superheat of heat exchanger be TC-1 DEG C, when heating the degree of supercooling of heat exchanger be TH-2 DEG C；For being labeled as
The indoor set of M, the degree of superheat of heat exchanger is TC DEG C during refrigeration, and the degree of supercooling of heat exchanger is TH DEG C when heating；For labeled as S's
Indoor set, the degree of superheat of heat exchanger is TC+1 DEG C during refrigeration, and the degree of supercooling of heat exchanger is TH+2 DEG C when heating；
(8) electronic expansion valve of indoor unit is adjusted, with the control targe for reaching described indoor mechanism cold, heat.
Specifically, the target superheat degree of user preset is more than 1 DEG C and less than 2 DEG C in step (2).
Specifically, minimum institute in the low pressure value that is detected by pressure sensor on each outdoor unit of outdoor unit characteristic value
Corresponding refrigerator saturation temperature value.
Further, each indoor set characteristic value is the heat exchanger coils temperature value of each indoor set.
Further, the global feature value Tm of indoor set is the maximum of T 2max in the heat exchanger coils temperature of indoor set
With the average value of minimum value T2min, i.e. Tm=(T2min+T2max)/2.
Specifically, the first kind length is more than 150 meters, the Equations of The Second Kind length is 100 meters, the 3rd class length
It is less than 50 meters.
Specifically, adjustment compressor of outdoor unit rotating speed is realized by controlling constant speed compressor to open and close.
Further, before compressor of outdoor unit rotating speed is adjusted, each protection value of outdoor unit will be according to step for step (5)
(2) refrigeration described in, heat control targe and be adjusted.
The beneficial effects of the invention are as follows：The present invention weighed with the characteristic value difference of indoor and outdoor machine judge indoor and outdoor machine it
Between pipe arrangement length, control outdoor unit control targe more accurate to the interior space to realize according to different judged results
The matching of cooling and warming demand, and distance to multiple indoor sets apart from outdoor unit classifies, to realize to each indoor set
The amendment of control targe, realizes the power balance between different indoor sets.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, the present invention is done further retouch in detail below
State.
In multi-connected machine convertible frequency air-conditioner debugging process, connected machine outdoor machine system is connected using X platforms module, indoor set
Number of units is Z.
(1) system sets pipe arrangement recognition mode, and all indoor sets are opened, the operation of outdoor unit full load；Indoor set heat exchanger
The degree of superheat be all higher than 1 DEG C and less than 2 DEG C of judgement systems stabilization, now：
Collection outdoor unit characteristic value is each module low pressure value, minimal pressure force value Pmin is drawn after being compared, and turn
It is changed to the saturation temperature Tsatmin corresponding to refrigerator.
The heat exchanger coils temperature that each outdoor unit characteristic value is indoor set is gathered, Tei (i is 1 to Z) is respectively labeled as, it is right
Tei is ranked up, and obtains Temin and Temax, further obtains indoor set global feature value Tm=(Temin+Temax)/2.
(2) the difference Td=Tm-Tsatmin of indoor set global feature value and outdoor unit characteristic value is obtained.
(3) piping length of indoor and outdoor machine is judged according to the Td for obtaining.8 DEG C of Td ＜, piping length is more than 150 meters；8℃≤
5 DEG C of piping lengths of Td ＜ are 100 meters；5 DEG C≤Td ＜, 3 DEG C of piping lengths are 50 meters；
(4) saturation temperature Tsatlp corresponding to selection outdoor machine system low pressure is control targe when freezing, when heating
Saturation temperature Tsathp corresponding to selection outdoor machine system high-pressure is control targe, according to the pipe arrangement that step (3) is obtained
Length, the control targe for outdoor mechanism cold is obtained as follows, heating：When piping length is more than 150 meters, refrigeration control target
Tsatlp is 1 DEG C, heats control targe Tsathp for 50 DEG C；When piping length is 100 meters, refrigeration control target Tsatlp is
3 DEG C, control targe Tsathp is heated for 48 DEG C；When piping length is 50 meters, refrigeration control target Tsatlp is 6 DEG C, is heated
Control targe Tsathp is 46 DEG C；
(5) each outdoor unit protection value is adjusted accordingly according to the change of its control targe；
(6) compressor rotary speed of outdoor unit is adjusted, with the control targe for reaching described outdoor mechanism cold, heat.Specifically
Can open and close what is realized by controlling constant speed compressor, with the control targe for reaching described outdoor mechanism cold, heat
(7) difference Tdi, i.e. Tdi=Tei-Tsatmin between each indoor set characteristic value and outdoor unit characteristic value are calculated.
(8) Tdi is ranked up, obtains Tdimin and Tdimax, and each indoor set is marked, and according to such as lower section
Formula is marked to each indoor set：Indoor set mark for Tdimin≤Tdi ＜ (Tdimin+ (Tdimax-Tdimin)/3)
It is S, i.e. pipe arrangement is nearer away from outdoor unit；For Tdimin+ (Tdimax-Tdimin)/3≤Tdi ＜ (Tdimin+ (Tdimax-
Tdimin) indoor set 2/3) is intermediate distance away from outdoor unit labeled as M, i.e. pipe arrangement；For Tdimin+ (Tdimax-
Tdimin) indoor set of 2/3≤Tdi ＜ Tdimax is more remote away from outdoor unit labeled as L, i.e. pipe arrangement.
(9) according to the mark result to indoor set piping length, indoor mechanism cold, the control targe for heating：It is to mark
Indoor set, during refrigeration the degree of superheat be TC-1 DEG C, when heating degree of supercooling be TH-2 DEG C；For the indoor set labeled as M, during refrigeration
The degree of superheat is TC DEG C, and degree of supercooling is TH DEG C when heating；For the indoor set labeled as S, the degree of superheat is TC+1 DEG C during refrigeration, is heated
When degree of supercooling be TH+2 DEG C.
(10) electronic expansion valve of indoor unit is adjusted, with the control targe for reaching described indoor mechanism cold, heat.
General principle of the invention and main feature are the foregoing described, the description of specification is explanation original of the invention
Reason, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes and improvements
All fall within the protetion scope of the claimed invention.
Claims (8)
1. the control method of multi-gang air-conditioner, it is characterised in that comprise the following steps：
(1) after multiple on-line system installation, whole indoor sets are in start refrigeration operational state；
(2) when the target superheat that whole electronic expansion valve of indoor unit control heat exchanger reaches user preset is spent, outdoor unit is detected
Characteristic value T1 and each indoor set characteristic value T2i, and obtain the global feature value Tm of indoor set；
(3) the difference Td, i.e. Td=Tm-T1 of indoor set global feature value Tm and outdoor unit characteristic value T1 are calculated；According to what is obtained
Td judges the overall piping length between indoor set and outdoor unit：As 8 DEG C of Td ＜, piping length is default first kind length；
When 8 DEG C≤Td ＜, 5 DEG C of piping lengths are default Equations of The Second Kind length；When 5 DEG C≤Td ＜, 3 DEG C of piping lengths are default 3rd class
Length；
(4) saturation temperature Tsatlp corresponding to selection outdoor machine system low pressure is control targe when freezing, and is selected when heating
Saturation temperature Tsathp corresponding to outdoor machine system high-pressure is control targe, according to the piping length that step (3) is obtained,
The control targe for obtain outdoor mechanism cold as follows, heating：When piping length is first kind length, refrigeration control target
Tsatlp is 1 DEG C, heats control targe Tsathp for 50 DEG C；When piping length is for Equations of The Second Kind length, refrigeration control target
Tsatlp is 3 DEG C, heats control targe Tsathp for 48 DEG C；When piping length is for the 3rd class length, refrigeration control target
Tsatlp is 6 DEG C, heats control targe Tsathp for 46 DEG C；
(5) compressor rotary speed of outdoor unit is adjusted, with the control targe for reaching described outdoor mechanism cold, heat；
(6) difference Tdi, i.e. Tdi=T2i-T1 between each indoor set characteristic value and outdoor unit characteristic value are calculated；Tdi is arranged
Sequence, obtains Tdimin and Tdimax, and each indoor set is marked according to following manner：For Tdimin≤Tdi ＜
The indoor set of (Tdimin+ (Tdimax-Tdimin)/3) is nearer away from outdoor unit labeled as S, i.e. pipe arrangement；For Tdimin+
(Tdimax-Tdimin) indoor set of/3≤Tdi ＜ (Tdimin+ (Tdimax-Tdimin) 2/3) is labeled as M, i.e., pipe arrangement is away from room
Outer machine is intermediate distance；Indoor set for Tdimin+ (Tdimax-Tdimin) 2/3≤Tdi ＜ Tdimax is labeled as L, that is, match somebody with somebody
Pipe is more remote away from outdoor unit；
(7) foundation step (6) is to the mark result of indoor set, the control targe for obtain indoor mechanism cold, heating：It is to mark
Indoor set, during refrigeration the degree of superheat of heat exchanger be TC-1 DEG C, when heating the degree of supercooling of heat exchanger be TH-2 DEG C；For being labeled as
The indoor set of M, the degree of superheat of heat exchanger is TC DEG C during refrigeration, and the degree of supercooling of heat exchanger is TH DEG C when heating；For labeled as S's
Indoor set, the degree of superheat of heat exchanger is TC+1 DEG C during refrigeration, and the degree of supercooling of heat exchanger is TH+2 DEG C when heating；
(8) electronic expansion valve of indoor unit is adjusted, with the control targe for reaching described indoor mechanism cold, heat.
2. the control method of multi-gang air-conditioner according to claim 1, it is characterised in that user preset in step (2)
Target superheat degree is more than 1 DEG C and less than 2 DEG C.
3. the control method of multi-gang air-conditioner according to claim 1, it is characterised in that outdoor unit characteristic value is each outdoor
Refrigerator saturation temperature value in the low pressure value that pressure sensor is detected on machine corresponding to minimum.
4. the control method of the multi-gang air-conditioner according to claim 1 or 3, it is characterised in that each indoor set characteristic value is
The heat exchanger coils temperature value of each indoor set.
5. the control method of multi-gang air-conditioner according to claim 4, it is characterised in that the global feature value of indoor set is
The average value of the maxima and minima in the heat exchanger coils temperature of indoor set.
6. the control method of multi-gang air-conditioner according to claim 1, it is characterised in that the first kind length be more than
150 meters, the Equations of The Second Kind length is 100 meters, and the 3rd class length is less than 50 meters.
7. the control method of multi-gang air-conditioner according to claim 6, it is characterised in that adjustment compressor of outdoor unit rotating speed
It is to be realized by controlling constant speed compressor to open and close.
8. the control method of the multi-gang air-conditioner according to claim 1 or 7, it is characterised in that step (5) is outdoor in adjustment
Before machine compressor rotary speed, each protection value of outdoor unit by according to the refrigeration described in step (2), heat control targe and adjusted
It is whole.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611150226.5A CN106765931B (en) | 2016-12-14 | 2016-12-14 | The control method of multi-gang air-conditioner |
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| CN201611150226.5A CN106765931B (en) | 2016-12-14 | 2016-12-14 | The control method of multi-gang air-conditioner |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108613336A (en) * | 2018-05-15 | 2018-10-02 | 青岛海尔空调电子有限公司 | It is a kind of for controlling the method and apparatus of air conditioner, air conditioner, computer readable storage medium |
| CN111623473A (en) * | 2020-06-08 | 2020-09-04 | 珠海格力电器股份有限公司 | Adaptive debugging method of air conditioner |
| CN113739337A (en) * | 2021-09-13 | 2021-12-03 | 南京天加环境科技有限公司 | Multi-split control method suitable for different pipe lengths |
| CN114110994A (en) * | 2020-08-25 | 2022-03-01 | 广东美的制冷设备有限公司 | Air conditioning system throttling control method and device based on pipe length |
| CN114198807A (en) * | 2021-11-19 | 2022-03-18 | 青岛海尔空调电子有限公司 | Self-adaptive control method and device for multi-connected air conditioning unit, air conditioning unit and medium |
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| JPH11337236A (en) * | 1998-05-29 | 1999-12-10 | Matsushita Refrig Co Ltd | Air conditioner |
| CN103162385A (en) * | 2013-04-02 | 2013-06-19 | 四川长虹电器股份有限公司 | Device and method of adjusting electronic expansion valve of refrigeration equipment |
| CN105423978A (en) * | 2015-11-23 | 2016-03-23 | 珠海格力电器股份有限公司 | Detection method, apparatus and system for engineering piping length of multi-split system |
| CN106196495A (en) * | 2016-08-08 | 2016-12-07 | 珠海格力电器股份有限公司 | Control device, control method and the multi-gang air-conditioner of a kind of multi-gang air-conditioner |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11337236A (en) * | 1998-05-29 | 1999-12-10 | Matsushita Refrig Co Ltd | Air conditioner |
| CN103162385A (en) * | 2013-04-02 | 2013-06-19 | 四川长虹电器股份有限公司 | Device and method of adjusting electronic expansion valve of refrigeration equipment |
| CN105423978A (en) * | 2015-11-23 | 2016-03-23 | 珠海格力电器股份有限公司 | Detection method, apparatus and system for engineering piping length of multi-split system |
| CN106196495A (en) * | 2016-08-08 | 2016-12-07 | 珠海格力电器股份有限公司 | Control device, control method and the multi-gang air-conditioner of a kind of multi-gang air-conditioner |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108613336A (en) * | 2018-05-15 | 2018-10-02 | 青岛海尔空调电子有限公司 | It is a kind of for controlling the method and apparatus of air conditioner, air conditioner, computer readable storage medium |
| CN111623473A (en) * | 2020-06-08 | 2020-09-04 | 珠海格力电器股份有限公司 | Adaptive debugging method of air conditioner |
| CN114110994A (en) * | 2020-08-25 | 2022-03-01 | 广东美的制冷设备有限公司 | Air conditioning system throttling control method and device based on pipe length |
| CN114110994B (en) * | 2020-08-25 | 2023-04-11 | 广东美的制冷设备有限公司 | Air conditioning system throttling control method and device based on pipe length |
| CN113739337A (en) * | 2021-09-13 | 2021-12-03 | 南京天加环境科技有限公司 | Multi-split control method suitable for different pipe lengths |
| CN114198807A (en) * | 2021-11-19 | 2022-03-18 | 青岛海尔空调电子有限公司 | Self-adaptive control method and device for multi-connected air conditioning unit, air conditioning unit and medium |
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| Publication number | Publication date |
|---|---|
| CN106765931B (en) | 2019-07-12 |
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