CN106052215A - Control method of electronic expansion valve of outdoor unit of air conditioner - Google Patents
Control method of electronic expansion valve of outdoor unit of air conditioner Download PDFInfo
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- CN106052215A CN106052215A CN201610515017.XA CN201610515017A CN106052215A CN 106052215 A CN106052215 A CN 106052215A CN 201610515017 A CN201610515017 A CN 201610515017A CN 106052215 A CN106052215 A CN 106052215A
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- frequency
- real time
- integral coefficient
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Classifications
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- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
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- 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
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- 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
- F25B2313/031—Sensor arrangements
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The invention discloses a control method of an electronic expansion valve of an outdoor unit of an air conditioner. The control method comprises the steps of obtaining real-time operating frequency and real-time discharge temperature of a compressor after the compressor is started to operate, and comparing the real-time operating frequency with first set frequency; obtaining an integral coefficient of a PID algorithm according to a first set rule if the real-time operating frequency is not greater than the first set frequency; obtaining the integral coefficient of the PID algorithm according to a second set rule if the real-time operating frequency is greater than the first set frequency; taking a difference value between the real-time discharge temperature and a set target discharge temperature as a deviation and performing PID control on the opening of the electronic expansion valve based on the deviation. By adopting the control method, the opening of the electronic expansion valve can be accurately and stably adjusted.
Description
Technical field
The invention belongs to air-conditioning technique field, specifically, relate to the control of air-conditioning, more specifically, be to relate to
And the control method of outdoor machine of air-conditioner electronic expansion valve.
Background technology
Electric expansion valve, as a kind of novel control element, is widely used in air conditioner coolant blood circulation.By right
The aperture of electric expansion valve is adjusted, the refrigerant circulation in regulation system, it is possible to meet operation of air conditioner performance requirement.Cause
How this, control effectively to electric expansion valve, is the key weighing air conditioning system Energy Efficiency Ratio.
In prior art, can use pid algorithm that the aperture of electric expansion valve is controlled.Specifically, it is with pressure
The actual exhaust air temperature of contracting machine and the difference of target exhaust temperature, as deviation, carry out PID arithmetic based on this deviation, it is achieved to electricity
The regulation of sub-expansion valve opening controls, and can make the control of valve more rapidly, and the followability changed to external world improves.But, existing
In having PID to adjust valve to control, pid parameter value immobilizes so that the regulation of valve opening can not the change of adaptation condition, valve opening is adjusted
Save the most accurate, it is difficult to reach the Energy Efficiency Ratio of preferable air conditioner coolant blood circulation.
Summary of the invention
It is an object of the invention to provide the control method of a kind of outdoor machine of air-conditioner electronic expansion valve, reach electric expansion valve
Accurate, the stable regulation of aperture and the technical purpose of the Energy Efficiency Ratio of raising air conditioner coolant blood circulation.
For achieving the above object, the present invention uses following technical proposals to be achieved:
A kind of control method of outdoor machine of air-conditioner electronic expansion valve, described method includes:
After compressor start runs, obtain real time execution frequency and the real time exhaust gas temperature of compressor, by described real time execution frequency
Rate is made comparisons with the first setpoint frequency；
If described real time execution frequency is not more than described first setpoint frequency, set the long-pending of Rule pid algorithm according to first
Divide coefficient, if described real time execution frequency is more than described first setpoint frequency, set the long-pending of Rule pid algorithm according to second
Divide coefficient；And set rule according to the integral coefficient of the described first pid algorithm setting Rule less than according to described second
The integral coefficient of the pid algorithm obtained；
Using the difference of described real time exhaust gas temperature and target setting delivery temperature as deviation, based on described deviation to electronic expansion
The aperture of valve carries out PID control；Described first setting rule or institute according to the integral coefficient of pid algorithm in described PID control
State the integral coefficient of the second setting Rule.
Preferably, described first set rule as: integral coefficient is as first integral coefficient；
The described integral coefficient according to the first setting Rule pid algorithm is particularly as follows: compose the integral coefficient of described pid algorithm
Value is described first integral coefficient.
Preferably, described second rule is set as integration system when described real time execution frequency is not more than the second setpoint frequency
Number becomes positive correlation with described real time execution frequency, and described real time execution frequency is more than integration system during described second setpoint frequency
Number is second integral coefficient；
Described set the integral coefficient of Rule pid algorithm particularly as follows: by described real time execution frequency with described according to second
Second setpoint frequency is made comparisons, if described real time execution frequency is not more than described second setpoint frequency, closes according to described positive correlation
System determines the integral coefficient corresponding with the described real time execution frequency integral coefficient as pid algorithm；If described real time execution
Frequency is more than described second setpoint frequency, and the integral coefficient of described pid algorithm is entered as described second integral coefficient；
Described second integral coefficient is not more than integral coefficient during described second setpoint frequency not less than described real time execution frequency,
Described second setpoint frequency is more than described first setpoint frequency.
It is furthermore preferred that described positive correlation is: Ki=A*f+B, in formula, f is described real time execution frequency, Ki for institute
Stating the integral coefficient that real time execution frequency is corresponding, A and B is constant.
Preferably, described B value is described first integral coefficient.
Preferably, described first setpoint frequency is 25-32Hz, and described second setpoint frequency is 35-40Hz.
Method as above, described target setting delivery temperature determines according to described real time execution frequency.
Preferably, described target setting delivery temperature is linear with described real time execution frequency.
Compared with prior art, advantages of the present invention and good effect are: use the method for the present invention to electric expansion valve
When carrying out PID regulation control, in the compressor low-frequency operation stage, the integral coefficient of selection of small is as the integration system of pid algorithm
Number so that adjust regulated value during valve less during low-frequency operation, reduces fluctuation and the fluctuation of valve opening regulation of delivery temperature；
And in the compressor non-low-frequency operation stage, select bigger integral coefficient as the integral coefficient of pid algorithm so that non-low frequency is transported
During row, regulated value is relatively big, adjusts valve speed fast.Thus, during whole compressor operating, electronic expansion valve opening regulates
Accurately, stablize, the beneficially lifting of air conditioner coolant blood circulation Energy Efficiency Ratio.
After reading in conjunction with the accompanying the detailed description of the invention of the present invention, the other features and advantages of the invention will become more clear
Chu.
Accompanying drawing explanation
Fig. 1 is the flow chart of one embodiment of control method of outdoor machine of air-conditioner electronic expansion valve of the present invention.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below with reference to drawings and Examples,
The present invention is described in further detail.
Referring to Fig. 1, this figure show one embodiment of control method of outdoor machine of air-conditioner electronic expansion valve of the present invention
Flow chart, specifically, is the embodiment being controlled the electronic expansion valve opening in air conditioner coolant blood circulation
Flow chart.
As it is shown in figure 1, the method that this embodiment realizes electronic expansion valve controls comprises the steps:
Step 11: after compressor start runs, obtains real time execution frequency and the real time exhaust gas temperature of compressor, by real time execution
Frequency is made comparisons with the first setpoint frequency.
In this step, after the real time execution frequency of compressor refers to compressor start, gathered according to setting sample frequency
The real time execution frequency of compressor.Owing to the running frequency of compressor is to be controlled by the controller on air-conditioning computer plate,
Therefore, real time execution frequency when controller can obtain compressor operating easily.And real time exhaust gas temperature refers to compressor
The real time exhaust gas temperature of the compressor gathered after startup, according to setting sample frequency, can be by setting at exhaust outlet of compressor
Put temperature sensor to detect, and obtain real time exhaust gas temperature by controller.
After getting real time execution frequency, it is made comparisons with the first setpoint frequency, compare both sizes.Wherein,
First setpoint frequency is to pre-set and store a frequency values in controller of air conditioner, and can be modified by mandate,
It is used to the threshold frequency reflecting compressor low-frequency operation with non-low-frequency operation.Preferably, the first setpoint frequency is 25-
32Hz, and change with the difference of Air conditioner refrigerating capacity.General, air conditioner refrigerating amount is the biggest, and the first setpoint frequency is the least, otherwise
As the same.
Step 12: judge whether real time execution frequency is not more than the first setpoint frequency.If so, step 13 is performed；If it has not,
Perform step 14.
Step 13: if step 12 judges that real time execution frequency is not more than the first setpoint frequency, it is determined that compressor low frequency is transported
OK, then according to the first integral coefficient setting Rule pid algorithm.Then, step 15 is performed.
Step 14: if step 12 judges that real time execution frequency is more than the first setpoint frequency, it is determined that the non-low frequency of compressor is transported
OK, then according to the second integral coefficient setting Rule pid algorithm.Then, step 15 is performed.
Wherein, it is all in the controller pre-setting and being stored in air-conditioner that the first setting rule and second sets rule,
And can be modified by mandate.And, in step 13, the integral coefficient according to the first pid algorithm setting Rule is less than step
According to the second integral coefficient of pid algorithm setting Rule in rapid 14.That is, the PID obtained during compressor low-frequency operation
The integral coefficient of algorithm is less than the integral coefficient of pid algorithm acquired during the non-low-frequency operation of compressor.
Step 15: using the difference of real time exhaust gas temperature and target setting delivery temperature as deviation, based on deviation to electronics
The aperture of expansion valve carries out PID control.
This step 15 is transferred by step 13 or step 14, that is, obtain and real time execution frequency in step 13 or step 14
After the integral coefficient of the pid algorithm that rate is corresponding, based on acquired integral coefficient, the integral coefficient in pid algorithm is composed
Value, then performs PID and adjusts the process of valve.For the proportionality coefficient in pid algorithm and the assignment of differential coefficient, the most specifically limit
Fixed, can be fixed value.
PID adjusts the process of valve particularly as follows: real time exhaust gas temperature acquired in calculation procedure 11 and target setting aerofluxus temperature
The difference of degree is as deviation, using this deviation as the deviation in PID control, and the integration system obtained based on step 13 or step 14
Number, as parameter, performs PID and controls, it is achieved the PID of electronic expansion valve opening is controlled process.Wherein, target setting aerofluxus temperature
Degree refers to the delivery temperature expecting to reach, and can preset, it is also possible to determine in real time.Such as, the most true according to cold medium flux
Fixed, or, determine according to compressor operating frequency.Preferably, target setting delivery temperature is according to compressor real time execution frequency
Rate determines.Such as, pre-set and store the corresponding table of compressor operating frequency and target exhaust temperature, a frequency band pair
Answer a target exhaust temperature.During PID control, table look-up according to compressor real time execution frequency, find compressor real-time
Target exhaust temperature corresponding to running frequency, as target setting delivery temperature.As preferred embodiment, set mesh
Mark delivery temperature Td is linear with compressor real time execution frequency f, is expressed as with formula: Td=m*f+n.Wherein, m and n is
Constant known, that prestore.Linear relationship according to compressor real time execution frequency determines target setting aerofluxus temperature
Degree, it is possible to obtain maximum air-conditioning Energy Efficiency Ratio.
When using said method that electric expansion valve carries out PID regulation control, it is not more than in compressor real time execution frequency
In the low-frequency operation stage of the first setpoint frequency, the integral coefficient of selection of small is as the integral coefficient of pid algorithm so that low frequency is transported
Adjust regulated value during valve less during row, reduce fluctuation and the fluctuation of valve opening regulation of delivery temperature.And it is real at compressor
Time running frequency more than non-low-frequency operation stage of the first setpoint frequency, selects bigger integral coefficient amassing as pid algorithm
Divide coefficient so that during non-low-frequency operation, regulated value is relatively big, adjust valve speed fast.Thus, during whole compressor operating,
Electronic expansion valve opening regulation is accurate, stable, the beneficially lifting of air conditioner coolant blood circulation Energy Efficiency Ratio.
As preferred embodiment, first in step 13 set rule as: integral coefficient is as first integral coefficient.And
And, set the integral coefficient of Rule pid algorithm particularly as follows: the integral coefficient of pid algorithm is entered as first according to first
Integral coefficient.That is, in the case of compressor real time execution frequency is not more than the first setpoint frequency, the integration system of pid algorithm
Number is a fixed value.It is so designed that, preferably regulating effect can be obtained with simple processing mode.
And the second setting rule in step 14 is preferably: integration system when real time execution frequency is not more than the second setpoint frequency
Number becomes positive correlation with real time execution frequency, and when real time execution frequency is more than the second setpoint frequency, integral coefficient is second long-pending
Divide coefficient.And set the integral coefficient of Rule pid algorithm particularly as follows: first real time execution frequency set with second according to second
Determine frequency to make comparisons, if real time execution frequency is not more than the second setpoint frequency, determine and real time execution frequency according to positive correlation
The corresponding integral coefficient of rate is as the integral coefficient of pid algorithm；If real time execution frequency is more than the second setpoint frequency, by PID
The integral coefficient of algorithm is entered as second integral coefficient.Wherein, second integral coefficient is not more than the not less than real time execution frequency
Integral coefficient during two setpoint frequencies, the second setpoint frequency is more than the first setpoint frequency.
That is, the second setting rule includes two parts, a part is to be not more than the second setting frequency in real time execution frequency
During rate, integral coefficient becomes positive correlation, Part II to be more than the second setting frequency in real time execution frequency with real time execution frequency
During rate, integral coefficient is the second integral coefficient of a fixed value.If real time execution frequency is more than the first setpoint frequency but little
In the second setpoint frequency, the integral coefficient corresponding with real time execution frequency will be determined according to positive correlation, and as pid algorithm
Integral coefficient；If real time execution frequency is more than the second setpoint frequency, directly the integral coefficient of pid algorithm is entered as second and amasss
Divide coefficient.
Wherein, the second setpoint frequency is also to pre-set and store a frequency values in controller of air conditioner, and can
It is modified by mandate, is used to reflect the frequency that compressor running frequency when non-low-frequency operation is on the low side.And this second
Setpoint frequency is more than the first setpoint frequency.Preferably, the second setpoint frequency is 35-40Hz, and with the difference of Air conditioner refrigerating capacity
And change.General, air conditioner refrigerating amount is the biggest, and the second setpoint frequency is the least, and vice versa.And second integral coefficient is also one
Fixed value, and this value not less than when real time execution frequency is not more than the second setpoint frequency according to long-pending determined by positive correlation
Divide coefficient.That is, during whole compressor operating, second integral coefficient is the maximum integral coefficient in pid algorithm, and the
One integral coefficient is the minimum integration coefficient in pid algorithm, and the integral coefficient determined according to positive correlation is between first integral
Between coefficient and second integral coefficient.
As preferred embodiment, above-mentioned positive correlation is: Ki=A*f+B.In formula, f is real time execution frequency,
Ki is the integral coefficient corresponding with real time execution frequency, A and B is constant.Wherein, the value of f between the first setpoint frequency and
Between second setpoint frequency.It is furthermore preferred that B value is first integral coefficient, when f is the second setpoint frequency, according to Ki=A*f+
The integral coefficient Ki value that B determines is second integral coefficient.Thus, during whole compressor operating, integration in pid algorithm
The value of coefficient is continuous, it is to avoid integral coefficient jumps the fluctuation of the valve opening regulation caused.
And, for avoiding in particular cases occurring that electronic expansion valve opening is excessive or too small, open at whole electric expansion valve
During the control of degree, whether the aperture of real-time judge electric expansion valve limits in maximum allowable aperture and minimum permission aperture
In allowed band.If in allowed band, control electric expansion valve according to realistic objective aperture；If not in allowed band,
The aperture then controlling electric expansion valve is maximum allowable aperture (when realistic objective aperture is more than maximum allowable aperture) or minimum
Allow aperture (when realistic objective aperture is less than maximum allowable aperture).Wherein, maximum allowable aperture and minimum permission aperture are
Value known, that determine according to the performance parameter of air conditioner coolant blood circulation.
Above example is only in order to illustrate technical scheme, rather than is limited；Although with reference to aforementioned reality
Execute example the present invention has been described in detail, for the person of ordinary skill of the art, still can be to aforementioned enforcement
Technical scheme described in example is modified, or wherein portion of techniques feature is carried out equivalent；And these are revised or replace
Change, do not make the essence of appropriate technical solution depart from the spirit and scope of claimed technical solution of the invention.
Claims (8)
1. the control method of an outdoor machine of air-conditioner electronic expansion valve, it is characterised in that described method includes:
After compressor start runs, obtain real time execution frequency and the real time exhaust gas temperature of compressor, by described real time execution frequency
Rate is made comparisons with the first setpoint frequency；
If described real time execution frequency is not more than described first setpoint frequency, set the long-pending of Rule pid algorithm according to first
Divide coefficient, if described real time execution frequency is more than described first setpoint frequency, set the long-pending of Rule pid algorithm according to second
Divide coefficient；And set rule according to the integral coefficient of the described first pid algorithm setting Rule less than according to described second
The integral coefficient of the pid algorithm obtained；
Using the difference of described real time exhaust gas temperature and target setting delivery temperature as deviation, based on described deviation to electronic expansion
The aperture of valve carries out PID control；Described first setting rule or institute according to the integral coefficient of pid algorithm in described PID control
State the integral coefficient of the second setting Rule.
Method the most according to claim 1, it is characterised in that described first sets rule amasss as: integral coefficient as first
Divide coefficient；
The described integral coefficient according to the first setting Rule pid algorithm is particularly as follows: compose the integral coefficient of described pid algorithm
Value is described first integral coefficient.
Method the most according to claim 2, it is characterised in that described second sets rule as described real time execution frequency
When being not more than the second setpoint frequency, integral coefficient becomes positive correlation with described real time execution frequency, and described real time execution frequency is big
When described second setpoint frequency, integral coefficient is second integral coefficient；
Described set the integral coefficient of Rule pid algorithm particularly as follows: by described real time execution frequency with described according to second
Second setpoint frequency is made comparisons, if described real time execution frequency is not more than described second setpoint frequency, closes according to described positive correlation
System determines the integral coefficient corresponding with the described real time execution frequency integral coefficient as pid algorithm；If described real time execution
Frequency is more than described second setpoint frequency, and the integral coefficient of described pid algorithm is entered as described second integral coefficient；
Described second integral coefficient is not more than integral coefficient during described second setpoint frequency not less than described real time execution frequency,
Described second setpoint frequency is more than described first setpoint frequency.
Method the most according to claim 3, it is characterised in that described positive correlation is: Ki=A*f+B, in formula, f is institute
Stating real time execution frequency, Ki is the integral coefficient corresponding with described real time execution frequency, A and B is constant.
Method the most according to claim 4, it is characterised in that described B value is described first integral coefficient.
Method the most according to claim 3, it is characterised in that described first setpoint frequency is 25-32Hz, described second sets
Determining frequency is 35-40Hz.
Method the most according to any one of claim 1 to 6, it is characterised in that described target setting delivery temperature according to
Described real time execution frequency determines.
Method the most according to claim 7, it is characterised in that described target setting delivery temperature and described real time execution frequency
Rate is linear.
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| CN201610515017.XA CN106052215B (en) | 2016-07-04 | 2016-07-04 | The control method of outdoor machine of air-conditioner electronic expansion valve |
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| CN201610515017.XA CN106052215B (en) | 2016-07-04 | 2016-07-04 | The control method of outdoor machine of air-conditioner electronic expansion valve |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106642843A (en) * | 2017-02-20 | 2017-05-10 | 珠海格力电器股份有限公司 | Air conditioning unit and operation control method and device thereof |
| CN107036256A (en) * | 2017-05-31 | 2017-08-11 | 广东美的制冷设备有限公司 | The control method of delivery temperature, the control device of delivery temperature and air conditioner |
| CN110030676A (en) * | 2019-04-28 | 2019-07-19 | 广东美的暖通设备有限公司 | Air conditioning control method, device and computer readable storage medium |
| CN111023511A (en) * | 2019-12-25 | 2020-04-17 | Tcl空调器(中山)有限公司 | Air conditioner control method, air conditioner and storage medium |
| CN112283903A (en) * | 2020-09-11 | 2021-01-29 | 海信（山东）空调有限公司 | Air conditioner and control method of expansion valve |
| WO2022198979A1 (en) * | 2021-03-23 | 2022-09-29 | 青岛海尔空调器有限总公司 | Control method and apparatus for air conditioner, and air conditioner |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106642843A (en) * | 2017-02-20 | 2017-05-10 | 珠海格力电器股份有限公司 | Air conditioning unit and operation control method and device thereof |
| CN107036256A (en) * | 2017-05-31 | 2017-08-11 | 广东美的制冷设备有限公司 | The control method of delivery temperature, the control device of delivery temperature and air conditioner |
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| CN111023511A (en) * | 2019-12-25 | 2020-04-17 | Tcl空调器(中山)有限公司 | Air conditioner control method, air conditioner and storage medium |
| CN111023511B (en) * | 2019-12-25 | 2021-08-24 | Tcl空调器(中山)有限公司 | Air conditioner control method, air conditioner and storage medium |
| CN112283903A (en) * | 2020-09-11 | 2021-01-29 | 海信（山东）空调有限公司 | Air conditioner and control method of expansion valve |
| CN112283903B (en) * | 2020-09-11 | 2022-03-01 | 海信（山东）空调有限公司 | Air conditioner and control method of expansion valve |
| WO2022198979A1 (en) * | 2021-03-23 | 2022-09-29 | 青岛海尔空调器有限总公司 | Control method and apparatus for air conditioner, and air conditioner |
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| CN106052215B (en) | 2019-07-23 |
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