CN108826587A - A kind of central air-conditioning o controller and its control method - Google Patents
A kind of central air-conditioning o controller and its control method Download PDFInfo
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- CN108826587A CN108826587A CN201810378837.8A CN201810378837A CN108826587A CN 108826587 A CN108826587 A CN 108826587A CN 201810378837 A CN201810378837 A CN 201810378837A CN 108826587 A CN108826587 A CN 108826587A
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- compressor
- central air
- conditioning
- predetermined value
- room temperature
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/54—Control or safety arrangements characterised by user interfaces or communication using one central controller connected to several sub-controllers
-
- 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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
-
- 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
- F24F11/64—Electronic processing using pre-stored data
-
- 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
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
-
- 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
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/20—Humidity
-
- 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
- F24F2110/50—Air quality properties
- F24F2110/64—Airborne particle content
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2221/00—Details or features not otherwise provided for
- F24F2221/34—Heater, e.g. gas burner, electric air heater
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Human Computer Interaction (AREA)
- Thermal Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The present invention provides a kind of central air-conditioning o controller and its control method, including master controller, soft activator, compressor set, human-computer interaction interface, the master controller is electrically connected with the soft activator and the human-computer interaction interface respectively, the soft activator is electrically connected with the compressor set, the compressor set includes several compressors, the compressor set is controlled by the soft activator to be started, and is also electrically connected with temperature sensor and heater with the master controller；When central air-conditioning starts, when room temperature is higher than predetermined value, starting compressor set work, the partial shrinkage machine when room temperature reaches predetermined value, in close compressor group.The present invention overcomes the problems, such as that existing variable-frequency central air conditioner use cost is high, the compressor service life is short, and solves and determine frequency central air-conditioning compressor hard reboot, and can not adapt to environmental change and adjust the problem of output power is to reduce energy consumption to be classified.
Description
Technical field
The present invention relates to central air-conditioning export control technology field, in particular to a kind of central air-conditioning o controller and its
Control method.
Background technique
The control of temperature is critically important for the production of high quality liquor.Its influence since raw material maturation, and
And it is extended to the bottling of fermentation, ageing and white wine.If it can not be maintained to ensure Quality of Liquors in the brewing process of white wine
Temperature will not spawn first-chop wine, even also useless with the raw material of the high quality of best kind.Currently, alcoholic vehicle
Between temperature control is carried out using central air-conditioning substantially, and for many years, each enterprises and institutions of China compare central air conditioning managing
Extensive, air-conditioner temperature setting is unreasonable, causes efficiency not high, energy resources is caused to waste, increase environmental pressure, with construction
The target of resource-conserving and environment-friendly society is incompatible.
Central air-conditioning, which is generally divided into, at present determines frequency and frequency conversion, and the compressor rotary speed of fixed frequency air conditioner is basically unchanged, by continuous
Compressor " opens, stops " in ground to adjust room temperature, and more electric energy is consumed between one open-one close, when due to compressor start, electricity
The direct power frequency startup of machine, dash current is big, seriously affects service life of equipment, and fixed frequency air conditioner can not be defeated to output power progress
It adjusts out, the variation of environment temperature can not be adapted to；The host of convertible frequency air-conditioner can automatically provide required cold according to room availability
(heat) amount, after room temperature reaches desired value, sky withers host then can accurately keep the constant speed of this temperature to operate,
It realizes " not shutting down operating ", to guarantee the stabilization of environment temperature.Frequency conversion and the maximum difference of fixed frequency air conditioner are exactly that product is being pressed
Utilization principle on contracting machine is different.Although variable-frequency central air conditioner can adjust output power depending on changes in ambient temperature, by
Limited in by variable-frequency central air conditioner manufacturing cost, variable-frequency central air conditioner it is on the high side, and due to the pressure of variable-frequency central air conditioner
Contracting machine is easier to break down always in operation than traditional air conditioner, and compressor damage is the common event of variable-frequency central air conditioner
Barrier, once damage, replacement price is higher.In addition, frequency conversion machine control system is more much more complex than determining frequency machine, therefore computer control panel
Failure is higher, and maintenance cost is higher.In addition, many workshops can generate dust during production, and dust is to central hollow
Tune and a kind of pollution and destruction, can if things go on like this reduce the operational energy efficiency of central air-conditioning, shorten the working life.
Therefore, it is necessary to a kind of central air-conditioning o controllers, do not use converter technique, reduce central air-conditioning use cost,
The problem of extending the service life of compressor of air conditioner, and can solve fixed frequency air conditioner compressor hard reboot, and it is suitable for the variation of environment,
Classification adjusting is carried out to central air-conditioning output power, to achieve the purpose that reduce energy consumption, and there can be dedusting, with
Reduce influence of the dust to central air-conditioning, extends the service life of central air-conditioning.
Summary of the invention
In consideration of it, the present invention proposes a kind of central air-conditioning o controller and its control method, it is therefore intended that overcome existing
The problem that variable-frequency central air conditioner use cost is high, the compressor service life is short, and solve and determine frequency central air-conditioning compressor hard reboot, and nothing
Method adapts to environmental change and adjusts the problem of output power is to reduce energy consumption to be classified, and reduces dust to the shadow of central air-conditioning
It rings, extends the service life of central air-conditioning.
The technical proposal of the invention is realized in this way：
A kind of central air-conditioning o controller, including master controller, soft activator, compressor set, human-computer interaction interface, institute
It states master controller to be electrically connected with the soft activator and the human-computer interaction interface respectively, the soft activator and the compressor
Group electrical connection, the compressor set include several compressors, and the compressor set is controlled by the soft activator to be started, with
The master controller is also electrically connected with temperature sensor and heater；When central starting of air conditioner, the temperature sensor detection
Room temperature, when room temperature is higher than predetermined value, room is worked as in the main controller controls soft activator starting compressor set work
Partial shrinkage machine when interior temperature reaches predetermined value, in the main controller controls soft activator close compressor group；Work as interior
When temperature is lower than predetermined value, the compressor set is closed, the main controller controls start the heater and heated.
Further, the compressor set includes the first compressor, the second compressor, third compressor and the 4th compression
Machine, first compressor, the second compressor, third compressor, the 4th compressor are electrically connected with the soft activator respectively.
Further, control method includes：
When S1, central air-conditioning starting, predetermined temperature and humidity are set in human-computer interaction interface, when temperature sensor detects
The first compressor, the second compression when room temperature is higher than predetermined value, in main controller controls soft activator starting compressor set
Machine, third compressor and the 4th compressor operating；
S2, when temperature sensor detects that room temperature reaches predetermined value, main controller controls soft activator is by first
Compressor and the second compressor are closed, at this point, central air-conditioning output power is P1；
S3, when temperature sensor detect room temperature rise when, main controller controls soft activator starting first compression
Room temperature is maintained predetermined value by machine, and central air-conditioning output power is P2, P2 at this time>P1；
S4, when temperature sensor detect room temperature continue rise when, main controller controls soft activator starting second
Compressor operating, central air-conditioning output power is 100% at this time；
S5, when room temperature reaches predetermined value again, then close third compressor and the 4th compressor；
S6, step S1~S5 is repeated, successively back and forth.
Further, control method further includes：
When temperature sensor detects room temperature lower than predetermined value, then close compressor group, starting heater carry out
Heating, when temperature rises to predetermined value, heater stops working.
Further, further include humidifier and humidity sensor, the humidifier and humidity sensor respectively with the master
Controller electrical connection then starts humidifier and is humidified, when wet when humidity sensor detects indoor humidity lower than predetermined value
When degree reaches predetermined value, humidifier stops working.
Further, further include dust sensor and deduster, the dust sensor and deduster respectively with the master
Controller electrical connection, when dust sensor detects that indoor dust content is more than predetermined value, master controller will start dedusting
Device is dusted interior；When dust sensor detects indoor dust content lower than predetermined value, deduster stops working.
Compared with prior art, the beneficial effects of the invention are as follows：
(1) present invention overcomes the problems, such as that existing variable-frequency central air conditioner use cost is high, the compressor service life is short, does not use frequency conversion
Device realizes the control to central compressor of air conditioner, and solves and determine frequency central air-conditioning compressor hard reboot, causes rush of current big,
The higher problem of energy consumption, the present invention are suitable for environmental change, carry out classification to central air-conditioning and adjust output power, are reduced with reaching
The purpose of energy consumption, and by taking turns starting compressor operating, integrally extend the service life of central air-conditioning.
(2) present invention has the function of dedusting, reduces influence of the dust to central air-conditioning, and extend central air-conditioning uses the longevity
Life.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is only the preferred embodiment of the present invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is the overall schematic of the embodiment of the present invention 1；
Fig. 2 is the overall schematic of the embodiment of the present invention 2；
In figure, 1 it is master controller, 2 is soft activator, 3 is compressor set, 31 is the first compressor, 32 is the second compression
Machine, 33 be third compressor, 34 be the 4th compressor, 4 be human-computer interaction interface, 5 be temperature sensor, 6 be heater, 7 be
Humidifier, 8 be humidity sensor, 9 be deduster, 10 be dust sensor.
Specific embodiment
In order to be best understood from the technology of the present invention content, two specific embodiments are provided below, and in conjunction with attached drawing to the present invention
It is described further.
Embodiment 1
Referring to Fig. 1, a kind of central air-conditioning o controller, including it is master controller 1, soft activator 2, compressor set 3, man-machine
Interactive interface 4, the master controller 1 are electrically connected with the soft activator 2 and the human-computer interaction interface 4 respectively, described soft to open
Dynamic device 2 is electrically connected with the compressor set 3, and the compressor set 3 includes several compressors, and the compressor set 3 passes through institute
The control starting of soft activator 2 is stated, is also electrically connected with temperature sensor 5 and heater 6 with the master controller 1；Human-computer interaction circle
Face 4 is used for the soft start of compressor set 3, avoids rush of current for controlling master controller 1, soft activator 2.When central air-conditioning opens
When dynamic, the temperature sensor 5 detects room temperature, and when room temperature is higher than predetermined value, the master controller 1 controls soft open
Dynamic device 2 starts compressor set 3 and works, and compressor all in compressor set 3 starts work at this time, when room temperature reaches in advance
When definite value, the master controller 1 controls the partial shrinkage machine in 2 close compressor group 3 of soft activator；When temperature sensor 5 is examined
When measuring room temperature rising, master controller 1 controls the compressor that the starting of soft activator 2 stops, and starts the number of units root of compressor
Judged according to the ascensional range of room temperature, realizes classification output power, it is energy-saving to achieve the purpose that.Work as room temperature
When lower than predetermined value, the compressor set 3 is closed, the control of master controller 1 starts the heater 6 and heated, guaranteed
Room temperature it is constant.During central air-conditioning continuous service, compressor set 3 controls pressure therein by master controller 1
Contracting machine carries out circuiting sequentially start and stop, avoids the occurrence of a wherein compressor and integrally prolongs since long time continuous working causes to damage
The service life of long central air-conditioning.
Preferably, the compressor set 3 includes the first compressor 31, the second compressor 32, third compressor 33 and the 4th
Compressor 34, first compressor 31, the second compressor 32, third compressor 33, the 4th compressor 34 respectively with it is described soft
Starter 2 is electrically connected.By the way that compressor set 3 is set as four compressors, when starting wherein two compressor, export at this time
Power is 50%, when starting wherein three compressor simultaneously, output power 75%, and when starting four compressors simultaneously,
The power exported at this time is 100%, is suitable for environmental change, carries out classification to central air-conditioning and adjusts output power, to reach drop
The purpose of low energy consumption.
Control method of the present invention：
When S1, central air-conditioning starting, predetermined temperature and humidity are set in human-computer interaction interface 4, when temperature sensor 5 detects
When being higher than predetermined value to room temperature, master controller 1 controls soft activator 2 and starts the first compressor 31 in compressor set 3, the
Two compressors 32, third compressor 33 and the work of the 4th compressor 34；
S2, when temperature sensor 5 detects that room temperature reaches predetermined value, master controller 1 controls soft activator 2 for the
One compressor 31 and the second compressor 32 are closed, at this point, central air-conditioning output power is 50%；
S3, when temperature sensor 5 detect room temperature rise when, master controller 1 control soft activator 2 starting first pressure
Room temperature is maintained predetermined value by contracting machine 31, and central air-conditioning output power is 75% at this time；
S4, when temperature sensor 5 detects that room temperature continues to rise, master controller 1 controls the starting of soft activator 2 the
The work of two compressors 32, central air-conditioning output power is 100% at this time；
S5, when room temperature reaches predetermined value again, then close third compressor 33 and the 4th compressor 34；
S6, step S1~S5 is repeated, successively back and forth.
When temperature sensor 5 detects room temperature lower than predetermined value, then close compressor group 3, starting heater 6 into
Row heating, when temperature rises to predetermined value, heater 6 stops working.
Preferably, further include humidifier 7 and humidity sensor 8, the humidifier 7 and humidity sensor 8 respectively with it is described
Master controller 1 is electrically connected, and humidity sensor 8 feeds back to master controller 1 for detecting indoor humidity, when humidity sensor 8
When detecting indoor humidity lower than predetermined value, then starts humidifier 7 and humidified, when humidity reaches predetermined value, humidifier 7 stops
It only works, to guarantee indoor moisture constant.
A kind of central air-conditioning o controller proposed by the invention and its control method, overcome existing variable-frequency central air conditioner
The problem that use cost is high, the compressor service life is short does not use frequency converter, realizes the control to central compressor of air conditioner, and solve
Determining frequency central air-conditioning compressor hard reboot, causes rush of current big, the higher problem of energy consumption, the present invention is suitable for environmental change,
Classification is carried out to central air-conditioning and adjusts output power, to achieve the purpose that reduce energy consumption, and by taking turns starting compressor operating,
Entirety extends the service life of central air-conditioning.
Embodiment 2
Referring to fig. 2, the present embodiment the difference from embodiment 1 is that, further include dust sensor 10 and deduster 9, it is described
Dust sensor 10 and deduster 9 are electrically connected with the master controller 1 respectively, when dust sensor 10 detects indoor dust
When content is more than predetermined value, master controller 1 is dusted 9 pairs of interiors of deduster are started；When dust sensor 10 detects room
When interior dust content is lower than predetermined value, deduster 9 stops working.
A kind of central air-conditioning o controller proposed by the invention and its control method, have the function of dedusting, reduce
Influence of the dust to central air-conditioning, extends the service life of central air-conditioning.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (6)
1. a kind of central air-conditioning o controller, which is characterized in that including master controller, soft activator, compressor set, man-machine friendship
Mutual interface, the master controller are electrically connected with the soft activator and the human-computer interaction interface respectively, the soft activator with
The compressor set electrical connection, the compressor set includes several compressors, and the compressor set passes through the soft activator
Control starting, is also electrically connected with temperature sensor and heater with the master controller；When central starting of air conditioner, the temperature
Sensor detects room temperature, and when room temperature is higher than predetermined value, the main controller controls soft activator starts compressor
Group work, the part pressure when room temperature reaches predetermined value, in the main controller controls soft activator close compressor group
Contracting machine；When room temperature is lower than predetermined value, close the compressor set, the main controller controls start the heater into
Row heating.
2. a kind of central air-conditioning o controller according to claim 1, which is characterized in that the compressor set includes the
One compressor, the second compressor, third compressor and the 4th compressor, first compressor, the second compressor, third compression
Machine, the 4th compressor are electrically connected with the soft activator respectively.
3. a kind of central air-conditioning o controller according to claim 2, which is characterized in that its control method includes：
When S1, central air-conditioning starting, predetermined temperature and humidity are set in human-computer interaction interface, when temperature sensor detects interior
When temperature is higher than predetermined value, main controller controls soft activator starts the first compressor, the second compressor, the in compressor set
Three compressors and the 4th compressor operating；
S2, when temperature sensor detects that room temperature reaches predetermined value, main controller controls soft activator by first compression
Machine and the second compressor are closed, at this point, central air-conditioning output power is P1；
S3, when temperature sensor detect room temperature rise when, main controller controls soft activator start the first compressor, will
Room temperature maintains predetermined value, and central air-conditioning output power is P2, P2 at this time>P1；
S4, when temperature sensor detect room temperature continue rise when, main controller controls soft activator starting second compression
Machine work, central air-conditioning output power is 100% at this time；
S5, when room temperature reaches predetermined value again, then close third compressor and the 4th compressor；
S6, step S1~S5 is repeated, successively back and forth.
4. a kind of central air-conditioning o controller according to claim 1, which is characterized in that its control method further includes：
When temperature sensor detects room temperature lower than predetermined value, then close compressor group, starting heater are heated,
When temperature rises to predetermined value, heater stops working.
5. a kind of central air-conditioning o controller according to claim 1, which is characterized in that further include humidifier and humidity
Sensor, the humidifier and humidity sensor are electrically connected with the master controller respectively, when humidity sensor detects interior
When humidity is lower than predetermined value, then starts humidifier and humidified, when humidity reaches predetermined value, humidifier stops working.
6. a kind of central air-conditioning o controller according to claim 2, which is characterized in that further include dust sensor and
Deduster, the dust sensor and deduster are electrically connected with the master controller respectively, when dust sensor detects interior
Dust content be more than predetermined value when, master controller by start deduster interior is dusted；When dust sensor detects
When indoor dust content is lower than predetermined value, deduster stops working.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810378837.8A CN108826587B (en) | 2018-04-25 | 2018-04-25 | A kind of central air-conditioning o controller and its control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810378837.8A CN108826587B (en) | 2018-04-25 | 2018-04-25 | A kind of central air-conditioning o controller and its control method |
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| Publication Number | Publication Date |
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| CN108826587A true CN108826587A (en) | 2018-11-16 |
| CN108826587B CN108826587B (en) | 2019-08-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110726209A (en) * | 2019-10-29 | 2020-01-24 | 珠海格力电器股份有限公司 | Air conditioner control method and device, storage medium and processor |
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| CN1782617A (en) * | 2004-11-04 | 2006-06-07 | 维尼亚曼多株式会社 | Air conditioner and its control method |
| JP2011202891A (en) * | 2010-03-25 | 2011-10-13 | Daikin Industries Ltd | Air conditioner |
| CN206410293U (en) * | 2017-01-17 | 2017-08-15 | 北京世纪佰特节能技术有限公司 | A kind of controllable indoor PM2.5 fan coil intelligence control system |
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2018
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|---|---|---|---|---|
| CN2628967Y (en) * | 2003-04-02 | 2004-07-28 | 海尔集团公司 | Multi-compressor variable capacity fixed frequency one with one air conditioner |
| CN1680756A (en) * | 2004-04-08 | 2005-10-12 | 东莞市广大制冷有限公司 | Precisive module regulating method of air conditioner |
| CN1782617A (en) * | 2004-11-04 | 2006-06-07 | 维尼亚曼多株式会社 | Air conditioner and its control method |
| JP2011202891A (en) * | 2010-03-25 | 2011-10-13 | Daikin Industries Ltd | Air conditioner |
| CN206410293U (en) * | 2017-01-17 | 2017-08-15 | 北京世纪佰特节能技术有限公司 | A kind of controllable indoor PM2.5 fan coil intelligence control system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110726209A (en) * | 2019-10-29 | 2020-01-24 | 珠海格力电器股份有限公司 | Air conditioner control method and device, storage medium and processor |
| CN110726209B (en) * | 2019-10-29 | 2020-12-11 | 珠海格力电器股份有限公司 | Air conditioner control method and device, storage medium and processor |
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| Publication number | Publication date |
|---|---|
| CN108826587B (en) | 2019-08-27 |
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