CN106052012A - Variable frequency air conditioner refrigeration control method and device based on distance - Google Patents
Variable frequency air conditioner refrigeration control method and device based on distance Download PDFInfo
- Publication number
- CN106052012A CN106052012A CN201610354101.8A CN201610354101A CN106052012A CN 106052012 A CN106052012 A CN 106052012A CN 201610354101 A CN201610354101 A CN 201610354101A CN 106052012 A CN106052012 A CN 106052012A
- Authority
- CN
- China
- Prior art keywords
- frequency
- temperature
- time
- real
- air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- 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
- F24F11/62—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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
-
- 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
- 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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/30—Velocity
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Atmospheric Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Signal Processing (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a variable frequency air conditioner refrigeration control method and device based on distance. The variable frequency air conditioner refrigeration control method comprises the steps that air conditioner refrigeration operation is conducted, specifically, room temperature PID operation is conducted according to the temperature difference between the real-time indoor environment temperature and the set target temperature, and a first frequency is obtained; a heat source of a room where an air conditioner is located is detected, the real-time distance between the heat source and the air conditioner is determined, the real-time air speed corresponding to the real-time distance is determined, and a frequency corresponding to the real-time air speed is determined to serve as a second frequency; if the real-time indoor environment temperature is not lower than the set comfortable temperature, the smaller one of the first frequency and the second frequency is selected as a target frequency; if the real-time indoor environment temperature is lower than the set comfortable temperature, a target frequency is selected according to fuzzy control based on the real-time coil temperature; and a compressor of the air conditioner is controlled to operate according to the target frequency. By means of the variable frequency air conditioner refrigeration control method and device based on the distance, energy saving and comfortable control over the air conditioner can be achieved.
Description
Technical field
The invention belongs to air-conditioning technique field, specifically, relate to regulate the air-conditioning equipment of room air, more
Say body, relate to realize, based on distance, the method and device that refrigerating of convertible frequency air conditioner controls.
Background technology
Air-conditioning can freeze summer, winter can heat, it is possible to regulation indoor temperature reaches cool in summer and warm in winter, provides the user
Comfortable environment.While air-conditioning provides the user comfortableness, incident is the contradiction with high energy consumption.Energy expenditure is not
Increase only user's financial burden, also opposing with the trend of energy-conserving and environment-protective.Therefore, how to utilize air-conditioning to provide the user comfortable
Reduce the energy consumption of air-conditioning while environment, be current air-conditioner producer have been working hard solve problem.
Existing convertible frequency air-conditioner can control compressor operating frequency according to indoor environment temperature and target setting temperature, reaches
To energy-saving and cost-reducing purpose.But, can not realize more excellent according to the control mode of temperature control compressor operating frequency merely
Energy Saving Control, especially wind speed mutually synthermal, different run in the case of, it is difficult to reach control the most energy-conservation, comfortable.
Summary of the invention
It is an object of the invention to provide a kind of method and device realizing refrigerating of convertible frequency air conditioner control based on distance, it is achieved empty
The control energy-conservation, comfortable adjusted.
For achieving the above object, what the present invention provided realizes, based on distance, the method employing that refrigerating of convertible frequency air conditioner controls
Following technical proposals is achieved:
A kind of method realizing refrigerating of convertible frequency air conditioner control based on distance, described method includes:
Air conditioner refrigerating runs, and obtains real-time indoor environment temperature and sets indoor objects temperature, calculating described real-time indoor environment
The temperature difference between temperature and described setting indoor objects temperature, as the most indoor temperature difference, enters according to the described real-time indoor temperature difference
Row room temperature PID computing, it is thus achieved that first frequency；Detect the indoor thermal source in air-conditioning place in real time and determine between described thermal source and air-conditioning
Real-time distance, determine the wind speed corresponding with described real-time distance with the corresponding relation of wind speed and as reality according to known distance
Time wind speed, obtain the frequency corresponding with described real-time wind speed according to known wind speed and the corresponding relation of frequency, as second frequently
Rate；
Described real-time indoor environment temperature is made comparisons with setting suitable temperature；
If described real-time indoor environment temperature is not less than described setting suitable temperature, perform the first following control: select described
First frequency controls the compressor operating of air-conditioning with the smaller value in described second frequency；
If described real-time indoor environment temperature is less than described setting suitable temperature, perform the second following control: obtain air-conditioning and steam
Send out the real-time coil temperature of device, described real-time coil temperature is made comparisons with setting coil pipe target temperature；If described real-time coil pipe
Temperature is more than described setting coil pipe target temperature, selects described first frequency and the smaller value in described second frequency as target
Frequency, controls the compressor operating of air-conditioning according to described target frequency；If described real-time coil temperature is not more than described setting dish
Pipe target temperature, reduces the current operation frequency of compressor and obtains the 3rd frequency, selects described first frequency, described second frequency
Smaller value in rate and described 3rd frequency controls the compressor operating of air-conditioning.
For realizing aforementioned invention purpose, what the present invention provided realizes, based on distance, the device employing that refrigerating of convertible frequency air conditioner controls
Following technical proposals is achieved:
A kind of device realizing refrigerating of convertible frequency air conditioner control based on distance, described device includes:
Indoor environment temperature acquiring unit, is used for obtaining real-time indoor environment temperature；
Coil temperature acquiring unit, for obtaining the real-time coil temperature of A/C evaporator；
Room temperature PID arithmetic element, for calculating described real-time indoor environment temperature and the temperature difference set between indoor objects temperature,
As the most indoor temperature difference, carry out PID arithmetic according to the described real-time indoor temperature difference, it is thus achieved that and export first frequency；
Thermal source determines and distance acquiring unit, and the thermal source indoor for detection air-conditioning place in real time also determines described thermal source and air-conditioning
Between real-time distance；
Wind speed acquiring unit in real time, for obtaining corresponding with described real-time distance according to known distance with the corresponding relation of wind speed
Wind speed, and as real-time wind speed；
Second frequency acquiring unit, for obtaining corresponding with described real-time wind speed according to known wind speed with the corresponding relation of frequency
Frequency, as second frequency；
Control model selection unit, for relatively described real-time indoor environment temperature and setting suitable temperature, and knot is compared in output
Fruit selects signal as control model；
First control unit, is described real-time indoor environment temperature for selecting the comparative result of unit output in described control model
When degree is not less than described setting suitable temperature, described first frequency is selected to control air-conditioning with the smaller value in described second frequency
Compressor operating；
Second control unit, is described real-time indoor environment temperature for selecting the comparative result of unit output in described control model
When degree is less than described setting suitable temperature, described real-time coil temperature is made comparisons with setting coil pipe target temperature；If described reality
Time coil temperature more than described setting coil pipe target temperature, select described first frequency to make with the smaller value in described second frequency
For target frequency, control the compressor operating of air-conditioning according to described target frequency；If described real-time coil temperature is not more than described
Set coil pipe target temperature, the current operation frequency of compressor is reduced obtaining the 3rd frequency, select described first frequency, described
Smaller value in second frequency and described 3rd frequency controls the compressor operating of air-conditioning.
Compared with prior art, advantages of the present invention and good effect are:
In the present invention, when the compressor of convertible frequency air-conditioner is carried out FREQUENCY CONTROL, temperature factor and wind speed factor are considered
Between cooperation so that drive during compressor operating heat exchange amount produced by coolant with should during the air-flow institute that drives of blower fan operating
The heat exchange amount formed matches, it is to avoid press frequency is too high or the too high produced meaningless energy consumption of rotation speed of fan, it is achieved empty
The energy-saving run adjusted.And, wind speed controls according to the distance of thermal source with air conditioning room, improves the comfort level of user, and can
Noise is reduced in low wind speeds.Additionally, in the temperature factor control to compressor frequency, according to indoor environment temperature with set
Determine the size of suitable temperature, select use room temperature PID to control or use fuzzy control based on evaporator coil temperature, Ji Neng
, reach purpose of freezing during room temperature height in time, quickly room is lowered the temperature, again can be by coil temperature stably in coil pipe target temperature
Degree so that air conditioning exhausting temperature pleasant, reaches cool and the coldest comfortable cooling effect.
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 that the present invention realizes the flow chart of one embodiment of method that refrigerating of convertible frequency air conditioner controls based on distance；
Fig. 2 is that the present invention realizes the structured flowchart of one embodiment of device that refrigerating of convertible frequency air conditioner controls based on distance.
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 the present invention and realizes, based on distance, method one enforcement that refrigerating of convertible frequency air conditioner controls
The flow chart of example.
As it is shown in figure 1, the method employing that this embodiment realizes refrigerating of convertible frequency air conditioner control based on distance has following step
Flow process realize:
Step 11: air conditioner refrigerating runs, obtains real-time indoor environment temperature, sets indoor objects temperature, meanwhile, detect sky in real time
Adjust the thermal source of indoor, place and determine the real-time distance of thermal source and air conditioning room.
Specifically, when air-conditioning start runs, the indoor environment temperature in room residing for detection air-conditioning, detects in real time in real time
Temperature as real-time indoor environment temperature.So-called real-time indoor environment temperature, refers to after air-conditioning start runs, according to setting
The indoor environment temperature that fixed temperature sample frequency constantly obtains and updates.The acquisition of indoor environment temperature in real time can use existing
Technology realizes.Such as, by being arranged on air-conditioning air inlet or the temperature sensor detection air intake temperature near air-conditioning air inlet
Degree, the master control borad of air-conditioning passes through the output signal of collecting temperature sensor and processes, thus getting inlet temperature, and will
This temperature is as real-time indoor environment temperature.
Set indoor objects temperature to refer to wish the target temperature that indoor environment can reach, this setting indoor objects temperature
Can be the temperature value that user passes through remote controller or control terminal for air conditioner or air-conditioning panel is inputted, it is also possible to be air-conditioning master
The setting value that control plate calls automatically.No matter which kind of mode this temperature value uses set, and all can be got by air-conditioning master control borad.
After air-conditioning start runs, except detecting the real-time indoor environment temperature in room residing for air-conditioning in real time, also to examine in real time
Survey the thermal source that air-conditioning place is indoor, and determine the real-time distance of thermal source and air conditioning room.So-called real-time distance, is to open at air-conditioning
After machine runs, constantly obtain and distance between the indoor airflow and the air-conditioning that update according to setting sample frequency.The detection of thermal source
And the determination of distance of thermal source and air conditioning room can use prior art to realize.Such as, by arranging infrared battle array on air-conditioning
Sensor or common infrared sensor, calculate in conjunction with certain algorithm.
As preferred embodiment, thermal source that detection air-conditioning place is indoor and determine between thermal source and air-conditioning real-time away from
From, use following technological means to obtain, specifically include:
The infrared sensor controlled in air-conditioning carries out rotary scanning, it is thus achieved that the temperature information in sweep limits, according to temperature information
Obtain heat source temperature curve.
Specifically, can arrange infrared sensor and rotating mechanism on air-conditioning, the controller of air-conditioning controls rotating machine
Structure drives infrared sensor to rotate in bigger angular range.The infrared sensor rotated is to the region in the range of scanning angle
It is scanned, the temperature information of Real-time Collection scanning area.The reflection of this temperature information is sweeping of currently gathering of infrared sensor
The radiant intensity of object in the range of retouching, radiant intensity is the strongest, then it represents that the temperature value that infrared sensor gathers is the highest.Therefore,
In the scanning process of infrared sensor, before scanning thermal source, arrive the process after scanning thermal source, infrared sensing again to source center
The temperature value of device sampling is to arrive a low process the most again, and this is the process scanning a thermal source.Air-conditioning receives red
The temperature information of outer sensor sampling, the analysis of the i.e. radiant intensity of temperature information by gathering infrared sensor generates indoor
The temperature curve of thermal source.
Infrared sensor is driven to rotate, so having only to single-point infrared sensor can realize whole sky by rotational structure
Between the temperature scanning of scope, it is not necessary to array infrared sensor, data process relatively simple, expend the time short.
Then, according to heat source temperature curve determine between thermal source and thermal source and the air-conditioning that air-conditioning place is indoor real-time away from
From.
Specifically, air-conditioner by the crest value in analysis temperature curve, the radiant intensity of crest value correspondence thermal source, according to
Crest value may determine that the number of thermal source in current environment, and wherein, the coordinate figure of crest value is the coordinate figure i.e. position of thermal source.
And, the temperature value of infrared sensor sampling has relation with the distance of object, when object distance air-conditioning is the most remote, and infrared sensing
The temperature value that device gathers is the lowest, otherwise, closer to object true temperature value.Specifically, can according to temperature in temperature curve
Difference between high level and minimum determines the distance between thermal source and air-conditioner, according to scan period mid-infrared sensor acquisition
The maximum of temperature value and the difference of minima can interpolate that the thermal source of Current Scan and the relative distance of background, difference is more
Little, illustrate that thermal source is close with background, i.e. thermal source is with air-conditioning farther out.
Step 12: calculate real-time indoor environment temperature and the temperature difference set between indoor objects temperature, as the most indoor
The temperature difference, carries out room temperature PID computing according to the most indoor temperature difference, it is thus achieved that first frequency；Corresponding with wind speed according to known distance
Relation determines the wind speed corresponding with distance in real time and as real-time wind speed, obtains according to the corresponding relation of known wind speed with frequency
The frequency corresponding with real-time wind speed, as second frequency.
Master control borad, after getting real-time indoor environment temperature and setting indoor objects temperature, calculates temperature between the two
Difference, as the most indoor temperature difference.Then, room temperature PID computing is carried out according to the most indoor temperature difference, it is thus achieved that compressor is controlled
A frequency, and this frequency is defined as first frequency.Wherein, carry out room temperature PID computing according to the temperature difference, obtain compressor
The concrete grammar of the target frequency being controlled can use prior art to realize, and is not elaborated at this and limits.
Meanwhile, the wind speed corresponding with distance in real time is obtained always according to known distance with the corresponding relation of wind speed, as reality
Time wind speed.Specifically, the memorizer of air-conditioning master control borad is previously stored with the corresponding relation of distance and wind speed, wherein, away from
From the distance referred between indoor airflow and air-conditioning, wind speed refers to the speed that indoor unit fan of air conditioner operates.For different away from
From, to there being wind speed that is incomplete same or that differ completely, and distance is the biggest, and wind speed is the lowest.Also, it is preferred that, distance with
The corresponding relation of wind speed by research staff under theoretical direction, obtained by substantial amounts of operation of air conditioner simulation experiment, energy
Enough take into account air-conditioning comfortableness and energy saving as far as possible.Therefore, obtaining in real time apart from afterwards, corresponding with wind speed from distance
Relation first finds real-time distance, then obtains this in real time apart from corresponding wind speed, and using this wind speed as real-time wind speed.
Then, the frequency corresponding with real-time wind speed is obtained according to known wind speed with the corresponding relation of frequency, as second frequency.
Specifically, the memorizer of air-conditioning master control borad is also previously stored with the corresponding relation of wind speed and frequency, wherein,
Wind speed refers to the speed that indoor unit fan of air conditioner operates, and frequency refers to the running frequency of compressor.For different wind speed, corresponding
There is different frequencies.Also, it is preferred that, wind speed and the corresponding relation of frequency be by research staff under theoretical direction, through excessive
Obtained by the operation of air conditioner simulation experiment of amount, it is possible to take into account air-conditioning comfortableness and energy saving as far as possible.Set up wind speed with
The starting point of the corresponding relation of frequency is: for air conditioning system, if indoor machine fan rotating speed is certain, blower fan operating is driven
Dynamic air-flow is certain, that is, air quantity is certain；Air quantity is certain, its heat exchange formed with heat exchanger through indoor set heat exchanger
Ability is certain.If compressor operating frequency is too small, refrigerant circulation is very few, can reduce the exchange capability of heat of indoor heat exchanger, make
Obtain indoor wind pushing temperature to be not suitable for.And if compressor operating frequency is excessive, refrigerant circulation is big, indoor heat exchanger exchange capability of heat
Greatly, but the air quantity owing to producing under certain interior machine rotating speed is too small, and heat exchanger heat exchange efficiency can be caused to decline, and the big merit of compressor
Rate runs waste energy consumption.Therefore, it is necessary to wind speed is made corresponding with frequency and limits.
Therefore, after obtaining real-time wind speed, from the wind speed corresponding relation with frequency, first find real-time wind speed, then
Obtain this frequency corresponding to real-time wind speed, and using this frequency as second frequency.
And, a possible corresponding frequency of wind speed, it is also possible to corresponding multiple frequencies.If a wind speed correspond to many
Individual frequency, namely a real-time wind speed is to there being multiple frequency, in the case of this, selects the peak frequency in multiple frequency as
Two frequencies.
Step 13: judge that whether real-time indoor environment temperature is less than setting suitable temperature.If so, step 15 is performed；If
No, perform step 14.
This step can be carried out with step 12 simultaneously, is divided into two steps at this merely to clearly state this reality
Execute the control process of example.After step 11 gets real-time indoor environment temperature, real-time indoor environment temperature is relaxed with setting
Thermophilic degree is made comparisons, and judges that whether real-time indoor environment temperature is less than setting suitable temperature, in order to perform according to comparative result
Step 14 or the control of step 15.Wherein, one default setting temperature of air-conditioning when suitable temperature can be to dispatch from the factory is set, it is possible to
To be a design temperature that is selected voluntarily by user and that arrange.If by user's sets itself, air-conditioning can provide one
Reference temperature value, for reference.Such as, it is proposed that this suitable temperature is set as 27 DEG C.
Step 14: if step 13 judges that real-time indoor environment temperature not less than setting suitable temperature, then performs following
First controls: selects first frequency and the smaller value in second frequency as target frequency, controls air-conditioning according to target frequency
Compressor operating.
If indoor environment temperature is not less than setting suitable temperature in real time, show that now indoor temperature is higher, need quickly
Cooling.In the case of this, first frequency that comparison step 12 obtains and second frequency, select the smaller value in both, as target
Frequency, controls the compressor operating of air-conditioning according to target frequency.
Step 15: if step 13 judges real-time indoor environment temperature less than setting suitable temperature, then perform following the
Two control: obtain the real-time coil temperature of A/C evaporator and make comparisons with setting coil pipe target temperature；If more than setting coil pipe
Target temperature, selects first frequency and the smaller value in second frequency as target frequency；Coil pipe target temperature is set if being not more than
Degree, reduces the current operation frequency of compressor and obtains the 3rd frequency, select in first frequency, second frequency and the 3rd frequency
Smaller value is as target frequency；The compressor operating of air-conditioning is controlled according to target frequency.
If step 13 judges that indoor temperature is less than suitable temperature, for avoiding the too fast decline of temperature to cause body-sensing uncomfortable,
Consider evaporator coil temperature further, in order to adjust compressor operating frequency in time so that evaporator coil temperature can be steady
Surely arrive coil pipe target temperature, to adjust air conditioning exhausting temperature, reach cool and the coldest comfortable air-out effect.
Specifically, first, obtain the real-time coil temperature of A/C evaporator and set coil pipe target temperature, by real-time dish
Pipe temperature is made comparisons with setting coil pipe target temperature, to judge that whether real-time coil temperature is more than setting coil pipe target temperature.Its
In, the detection of evaporator coil temperature can detect by arranging coil temperature sensor on an evaporator.Set coil pipe mesh
One default setting temperature of air-conditioning when mark temperature can be to dispatch from the factory, naturally it is also possible to be being selected voluntarily by user and arranging
Individual design temperature.If by user's sets itself, due to user's concept for coil temperature and the performance indications of representative thereof
It not very clear and definite, preferably provided a reference temperature value by air-conditioning, for reference selected.Such as, it is proposed that by this coil pipe target
Temperature is set as 14 DEG C.
If coil temperature is more than setting coil pipe target temperature in real time, show that air conditioning exhausting temperature will not be on the low side, thus, will
The adjustment of room temperature adjusts main target as temperature, select first frequency and the smaller value in second frequency as target frequency,
The compressor operating of air-conditioning is controlled according to target frequency.And if coil temperature is not more than setting coil pipe target in real time, showing now
Coil temperature is on the low side, is easily caused air conditioning exhausting temperature on the low side and send cold wind.For solving this problem, by the current fortune of compressor
Line frequency reduces and obtains the 3rd frequency.Then, select the smaller value in first frequency, second frequency and the 3rd frequency as mesh
Mark frequency, controls the compressor operating of air-conditioning according to target frequency.
Use said method that frequency of air condition compressor is controlled, considered between temperature factor and wind speed factor
Coordinate so that the air-flow that during driving heat exchange amount produced by coolant during compressor operating and being somebody's turn to do, blower fan operating drives is formed
Heat exchange amount match, it is to avoid press frequency is too high or the too high produced meaningless energy consumption of rotation speed of fan, it is achieved air-conditioning
Energy-saving run.And, wind speed controls according to the distance of thermal source with air conditioning room, also improves the comfortableness of air-supply and relaxing of user
Appropriateness.Additionally, in the temperature factor control to compressor frequency, according to indoor environment temperature with set the big of suitable temperature
Little, select use room temperature PID to control or use fuzzy control based on evaporator coil temperature, can when room temperature height in time,
Quickly room is lowered the temperature, reach purpose of freezing, again can be by stable for coil temperature at coil pipe target temperature so that air-conditioning goes out
Air temperature is comfortable, reaches cool and the coldest comfortable cooling effect.
It should be noted that when performing the fuzzy control during the second control, the most constantly obtain the most indoor
Ambient temperature, and compare itself and the size setting suitable temperature.Once indoor environment temperature is not less than setting suitable temperature in real time,
Then exit the second control process, be transferred to the first control process.
As preferred embodiment, the memorizer of air-conditioning master control borad is previously stored with one and sets highest frequency, as
Smaller value during really step 14 judges first frequency and second frequency is more than setting highest frequency, or step 15 judges the first frequency
Smaller value in rate, second frequency and the 3rd frequency more than setting highest frequency, then will set highest frequency as target frequency.
It is to say, no matter be according to which FREQUENCY CONTROL compressor, all ensure that the running frequency of compressor is less than setting high frequency
Rate.
As preferred embodiment, control for second, it is also possible to include following control process:
If it is determined that in real time coil temperature is not more than and sets coil pipe target temperature, then it is not more than first after determining whether start,
And perform different process according to judged result.
Specifically, if coil temperature is not more than setting coil pipe target temperature, the 3rd frequency after air-conditioning is started shooting first in real time
Rate is for setting refrigeration minimum frequency；If coil temperature non-being not more than first after air-conditioning is started shooting, sets coil pipe target temperature in real time,
3rd frequency is between current operation frequency and refrigeration minimum frequency.Wherein, refrigeration minimum frequency is that air conditioner refrigerating ran
The minimum frequency of the setting in journey.Usually, this refrigeration minimum frequency is the parameter i.e. set before air-conditioning dispatches from the factory.
If being not more than setting coil pipe target temperature first that is, non-after coil temperature start in real time, then read compressor
Current operation frequency, then the 3rd frequency is chosen to be between current operation frequency and refrigeration minimum frequency between a frequency
Rate value.
The purpose so processed is, if coil temperature is not more than setting coil pipe target temperature first in real time, for avoiding
The reduction of air conditioning exhausting temperature and to cause air-out be cold wind, first the frequency of compressor is construed as limiting so that coil temperature is gone up as early as possible
Rise to set coil pipe target temperature.And if real-time coil temperature non-being not more than first sets coil pipe target temperature, shown
Performed the fuzzy control of the second control process, then coil temperature will not be too less than setting coil pipe target temperature, now, and the 3rd frequency
Rate is unnecessary near minimum, but between current operation frequency and refrigeration minimum frequency, to take into account the speed of room temperature regulation.
For real-time coil temperature start shooting after non-first be not more than set coil pipe target temperature time the 3rd frequency determination, can
To have multiple method, it is preferred to use following method:
Obtain the current operation frequency of compressor, every setting the adjustment time, current operation frequency reduced setting adjustment frequency,
Frequency after reduction is the 3rd frequency.
Wherein, set and adjust a frequency values pre-set before frequency is dispatched from the factory as air-conditioning, or set voluntarily for user
A fixed frequency values, such as, is set as 5Hz.This frequency values adjusts step-length as a frequency, represents and runs current every time
The reduction amplitude of frequency.And, reduce frequency to use and reduce mode once every the setting adjustment time, it is achieved progressively adjust
Joint.
As preferred embodiment, current operation frequency reduces to set adjusting frequency as the 3rd frequency every time
After, first judge whether to set the coil pipe target temperature difference with real-time coil temperature not less than setting overshoot temperature value.If so, exist
Continue executing with after setting the arrival of adjustment time to reduce current operation frequency and set the process adjusting frequency as the 3rd mark frequency；
Otherwise, keep the 3rd frequency constant.Wherein, overshoot temperature value is also a temperature value set, and such as, is set as 1 DEG C.
The advantage using above-mentioned process is: if it is determined that the difference setting coil pipe target temperature and real-time coil temperature is more than
Overshoot temperature value, shows that coil temperature is far below setting coil pipe target temperature, it is still necessary to frequency reducing further.And, as it was previously stated,
Down conversion process process sets the reduction of adjustment time once for interval.The adjustment time is also a pre-set value, represents frequency
The interval time that rate adjusts.For example, it is possible to be set as 2min.That is, after adjusting once, first using the frequency after adjusting as
3rd frequency, when the adjustment time is not up to, keeps the 3rd frequency constant.Adjust the time arrive after, then read compressor work as
Front running frequency, based on current operation frequency, continues to adjust frequency according to setting and carries out frequency reducing.
And if step judges that the difference setting coil pipe target temperature and real-time coil temperature is not more than overshoot temperature value, shows
Though coil temperature does not also arrive setting coil pipe target temperature, but less with the difference setting coil pipe target temperature, no more than overshoot temperature
Angle value, now, the most no longer reduces frequency, to avoid the occurrence of the overshoot of coil temperature, and affects room temperature governing speed.Thus, protect
Hold the 3rd frequency constant.
Refer to Fig. 2, the figure shows the present invention and realize, based on distance, one, the device enforcement that refrigerating of convertible frequency air conditioner controls
The structured flowchart of example.
As in figure 2 it is shown, the air conditioner refrigerating of this embodiment controls the construction unit that comprised of device and function is as follows:
Indoor environment temperature acquiring unit 201, is used for obtaining real-time indoor environment temperature.
Room temperature PID arithmetic element 202, for calculating the real-time indoor environment that indoor environment temperature acquiring unit 201 obtains
Temperature and the temperature difference set between indoor objects temperature, as the most indoor temperature difference, carry out PID fortune according to the most indoor temperature difference
Calculate, it is thus achieved that and export first frequency.
Coil temperature acquiring unit 203, for obtaining the real-time coil temperature of A/C evaporator.
Thermal source determines and distance acquiring unit 204, the thermal source indoor in real time detection air-conditioning place and determine thermal source with
Real-time distance between air-conditioning.
Wind speed acquiring unit 205 in real time, for obtaining and real-time distance according to the corresponding relation of known distance with wind speed
Corresponding wind speed, and as real-time wind speed.
Second frequency acquiring unit 206, for obtaining and real-time wind speed according to the corresponding relation of known wind speed with frequency
Corresponding frequency, as second frequency.
Control model selects unit 207, for comparing the most indoor ring acquired in indoor environment temperature acquiring unit 201
Border temperature with set suitable temperature, and export comparative result and select signal as control model.
First control unit 208, is real-time indoor environment for selecting the comparative result of unit 207 output in control model
Temperature, not less than when setting suitable temperature, selects the first frequency of room temperature PID arithmetic element 202 output to obtain single with second frequency
Smaller value in the second frequency of unit 206 output, as target frequency, controls the compressor operating of air-conditioning according to target frequency.
Second control unit 209, is real-time indoor environment for selecting the comparative result of unit 207 output in control model
Real-time coil temperature, less than when setting suitable temperature, is made comparisons by temperature with setting coil pipe target temperature.If coil temperature in real time
More than setting coil pipe target temperature, selection first frequency and the smaller value in second frequency are as target frequency, according to target frequency
Rate controls the compressor operating of air-conditioning；If coil temperature is not more than setting coil pipe target temperature in real time, by the current fortune of compressor
Line frequency reduces and obtains the 3rd frequency, select the smaller value in first frequency, second frequency and the 3rd frequency as target frequency,
The compressor operating of air-conditioning is controlled according to target frequency.
Thermal source determines and distance acquiring unit 204 can use and can detect thermal source in prior art and determine the knot of distance
Structure realizes.As preferred embodiment, thermal source determines and distance acquiring unit 204 uses following structure to realize:
Including:
Infrared sensor, is arranged in air-conditioning；
Rotating mechanism, is used for driving infrared sensor to rotate；
Thermal source determines and distance obtains subelement, for obtaining the temperature information in infrared sensor sweep limits, according to temperature
Information acquisition heat source temperature curve, determines between thermal source and thermal source and the air-conditioning that air-conditioning place is indoor according to heat source temperature curve
Distance in real time.
Each construction unit in said apparatus runs corresponding software program, and according to the flow performing air conditioner refrigerating of Fig. 1
Control, it is achieved the energy-conservation comfortable control of air-conditioning.
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 (9)
1. the method realizing refrigerating of convertible frequency air conditioner control based on distance, it is characterised in that described method includes:
Air conditioner refrigerating runs, and obtains real-time indoor environment temperature and sets indoor objects temperature, calculating described real-time indoor environment
The temperature difference between temperature and described setting indoor objects temperature, as the most indoor temperature difference, enters according to the described real-time indoor temperature difference
Row room temperature PID computing, it is thus achieved that first frequency；Detect the indoor thermal source in air-conditioning place in real time and determine between described thermal source and air-conditioning
Real-time distance, determine the wind speed corresponding with described real-time distance with the corresponding relation of wind speed and as reality according to known distance
Time wind speed, obtain the frequency corresponding with described real-time wind speed according to known wind speed and the corresponding relation of frequency, as second frequently
Rate；
Described real-time indoor environment temperature is made comparisons with setting suitable temperature；
If described real-time indoor environment temperature is not less than described setting suitable temperature, perform the first following control: select described
First frequency controls the compressor operating of air-conditioning with the smaller value in described second frequency；
If described real-time indoor environment temperature is less than described setting suitable temperature, perform the second following control: obtain air-conditioning and steam
Send out the real-time coil temperature of device, described real-time coil temperature is made comparisons with setting coil pipe target temperature；If described real-time coil pipe
Temperature is more than described setting coil pipe target temperature, selects described first frequency and the smaller value in described second frequency as target
Frequency, controls the compressor operating of air-conditioning according to described target frequency；If described real-time coil temperature is not more than described setting dish
Pipe target temperature, reduces the current operation frequency of compressor and obtains the 3rd frequency, selects described first frequency, described second frequency
Smaller value in rate and described 3rd frequency controls the compressor operating of air-conditioning.
2. according to the method described in right 1, it is characterised in that thermal source that described detection air-conditioning place is indoor also determines described thermal source
And the real-time distance between air-conditioning, specifically includes:
The infrared sensor controlled in air-conditioning carries out rotary scanning, it is thus achieved that the temperature information in sweep limits, according to described temperature
Information acquisition heat source temperature curve；
The real-time distance between thermal source and described thermal source and the air-conditioning that air-conditioning place is indoor is determined according to described heat source temperature curve.
Method the most according to claim 1, it is characterised in that in the corresponding relation of described wind speed and frequency, a wind speed
Correspond to multiple frequency, described second frequency is the peak frequency that described real-time wind speed is corresponding.
Method the most according to claim 1, it is characterised in that if less with described second frequency of described first frequency
Value or described first frequency, described second frequency and described 3rd frequency in smaller value more than set highest frequency, then will
Described setting highest frequency, as described target frequency, controls the compressor operating of air-conditioning according to described target frequency.
Method the most according to any one of claim 1 to 4, it is characterised in that if described real-time coil temperature is at air-conditioning
Being not more than described setting coil pipe target temperature after start first, described 3rd frequency is for setting refrigeration minimum frequency；If described reality
Time coil temperature described air-conditioning start shooting after non-first be not more than described setting coil pipe target temperature, described 3rd frequency is between institute
State between current operation frequency and described refrigeration minimum frequency.
Method the most according to claim 5, it is characterised in that if described real-time coil temperature is non-after described air-conditioning is started shooting
Being not more than described setting coil pipe target temperature first, described 3rd frequency uses following method to determine:
Obtain the described current operation frequency of compressor, every setting the adjustment time, described current operation frequency is reduced setting tune
Whole frequency, the frequency after reduction is described 3rd frequency.
Method the most according to claim 6, it is characterised in that described current operation frequency is reduced described setting every time and adjusts
After whole frequency is as described 3rd frequency, first judge that described setting coil pipe target temperature with the difference of described real-time coil temperature is
No not less than setting overshoot temperature value；If so, continue executing with described current operation frequency after the described setting adjustment time arrives
Rate reduces the described process setting and adjusting frequency as described 3rd mark frequency, otherwise, keeps described 3rd frequency constant.
8. the device realizing refrigerating of convertible frequency air conditioner control based on distance, it is characterised in that described device includes:
Indoor environment temperature acquiring unit, is used for obtaining real-time indoor environment temperature；
Coil temperature acquiring unit, for obtaining the real-time coil temperature of A/C evaporator；
Room temperature PID arithmetic element, for calculating described real-time indoor environment temperature and the temperature difference set between indoor objects temperature,
As the most indoor temperature difference, carry out PID arithmetic according to the described real-time indoor temperature difference, it is thus achieved that and export first frequency；
Thermal source determines and distance acquiring unit, and the thermal source indoor for detection air-conditioning place in real time also determines described thermal source and air-conditioning
Between real-time distance；
Wind speed acquiring unit in real time, for obtaining corresponding with described real-time distance according to known distance with the corresponding relation of wind speed
Wind speed, and as real-time wind speed；
Second frequency acquiring unit, for obtaining corresponding with described real-time wind speed according to known wind speed with the corresponding relation of frequency
Frequency, as second frequency；
Control model selection unit, for relatively described real-time indoor environment temperature and setting suitable temperature, and knot is compared in output
Fruit selects signal as control model；
First control unit, is described real-time indoor environment temperature for selecting the comparative result of unit output in described control model
When degree is not less than described setting suitable temperature, described first frequency is selected to control air-conditioning with the smaller value in described second frequency
Compressor operating；
Second control unit, is described real-time indoor environment temperature for selecting the comparative result of unit output in described control model
When degree is less than described setting suitable temperature, described real-time coil temperature is made comparisons with setting coil pipe target temperature；If described reality
Time coil temperature more than described setting coil pipe target temperature, select described first frequency to make with the smaller value in described second frequency
For target frequency, control the compressor operating of air-conditioning according to described target frequency；If described real-time coil temperature is not more than described
Set coil pipe target temperature, the current operation frequency of compressor is reduced obtaining the 3rd frequency, select described first frequency, described
Smaller value in second frequency and described 3rd frequency controls the compressor operating of air-conditioning.
Device the most according to claim 8, it is characterised in that described thermal source determines and distance acquiring unit includes:
Infrared sensor, is arranged in air-conditioning；
Rotating mechanism, is used for driving described infrared sensor to rotate；
Thermal source determines and distance obtains subelement, for obtaining the temperature information in described infrared sensor sweep limits, according to
Described temperature information obtains heat source temperature curve, determines the indoor thermal source in air-conditioning place and described according to described heat source temperature curve
Real-time distance between thermal source and air-conditioning.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610354101.8A CN106052012B (en) | 2016-05-25 | 2016-05-25 | The method and device of refrigerating of convertible frequency air conditioner control is realized based on distance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610354101.8A CN106052012B (en) | 2016-05-25 | 2016-05-25 | The method and device of refrigerating of convertible frequency air conditioner control is realized based on distance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106052012A true CN106052012A (en) | 2016-10-26 |
| CN106052012B CN106052012B (en) | 2019-01-15 |
Family
ID=57175939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610354101.8A Active CN106052012B (en) | 2016-05-25 | 2016-05-25 | The method and device of refrigerating of convertible frequency air conditioner control is realized based on distance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106052012B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106610087A (en) * | 2016-12-01 | 2017-05-03 | 青岛海尔空调器有限总公司 | Air conditioner refrigeration control achieving method and device |
| CN106642549A (en) * | 2016-12-01 | 2017-05-10 | 青岛海尔空调器有限总公司 | Method and device for achieving refrigeration control of air conditioner based on distance |
| CN106679071A (en) * | 2016-12-01 | 2017-05-17 | 青岛海尔空调器有限总公司 | Method and device for realizing refrigeration control of air conditioner |
| CN106839256A (en) * | 2016-12-01 | 2017-06-13 | 青岛海尔空调器有限总公司 | The method and device of air conditioner refrigerating control is realized based on distance |
| CN107101328A (en) * | 2017-04-21 | 2017-08-29 | 青岛海尔空调器有限总公司 | Air-conditioning and its control method |
| CN114909787A (en) * | 2022-04-25 | 2022-08-16 | 宁波奥克斯电气股份有限公司 | Control method and device of air conditioner and air conditioner |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07280320A (en) * | 1994-04-14 | 1995-10-27 | Matsushita Electric Ind Co Ltd | Air conditioner and control method thereof |
| CN101726073A (en) * | 2009-09-30 | 2010-06-09 | 广东美的电器股份有限公司 | Method for controlling convertible frequency air-conditioner |
| JP2010276324A (en) * | 2009-06-01 | 2010-12-09 | Mitsubishi Electric Corp | Air conditioner |
| CN104251538A (en) * | 2014-09-12 | 2014-12-31 | 广东美的制冷设备有限公司 | Air conditioner and control method and control device thereof |
| CN104697119A (en) * | 2015-03-24 | 2015-06-10 | 广东美的制冷设备有限公司 | Adaptive air supply method of air conditioner and controller |
| CN104697109A (en) * | 2014-12-22 | 2015-06-10 | 青岛海尔空调器有限总公司 | Refrigeration control method, control device and variable frequency air conditioner |
-
2016
- 2016-05-25 CN CN201610354101.8A patent/CN106052012B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07280320A (en) * | 1994-04-14 | 1995-10-27 | Matsushita Electric Ind Co Ltd | Air conditioner and control method thereof |
| JP2010276324A (en) * | 2009-06-01 | 2010-12-09 | Mitsubishi Electric Corp | Air conditioner |
| CN101726073A (en) * | 2009-09-30 | 2010-06-09 | 广东美的电器股份有限公司 | Method for controlling convertible frequency air-conditioner |
| CN104251538A (en) * | 2014-09-12 | 2014-12-31 | 广东美的制冷设备有限公司 | Air conditioner and control method and control device thereof |
| CN104697109A (en) * | 2014-12-22 | 2015-06-10 | 青岛海尔空调器有限总公司 | Refrigeration control method, control device and variable frequency air conditioner |
| CN104697119A (en) * | 2015-03-24 | 2015-06-10 | 广东美的制冷设备有限公司 | Adaptive air supply method of air conditioner and controller |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106610087A (en) * | 2016-12-01 | 2017-05-03 | 青岛海尔空调器有限总公司 | Air conditioner refrigeration control achieving method and device |
| CN106642549A (en) * | 2016-12-01 | 2017-05-10 | 青岛海尔空调器有限总公司 | Method and device for achieving refrigeration control of air conditioner based on distance |
| CN106679071A (en) * | 2016-12-01 | 2017-05-17 | 青岛海尔空调器有限总公司 | Method and device for realizing refrigeration control of air conditioner |
| CN106839256A (en) * | 2016-12-01 | 2017-06-13 | 青岛海尔空调器有限总公司 | The method and device of air conditioner refrigerating control is realized based on distance |
| CN107101328A (en) * | 2017-04-21 | 2017-08-29 | 青岛海尔空调器有限总公司 | Air-conditioning and its control method |
| CN114909787A (en) * | 2022-04-25 | 2022-08-16 | 宁波奥克斯电气股份有限公司 | Control method and device of air conditioner and air conditioner |
| CN114909787B (en) * | 2022-04-25 | 2023-10-20 | 宁波奥克斯电气股份有限公司 | Air conditioner control method and device and air conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106052012B (en) | 2019-01-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106052012A (en) | Variable frequency air conditioner refrigeration control method and device based on distance | |
| CN106123239B (en) | Air conditioning control method | |
| CN106016600B (en) | Convertible frequency air-conditioner control method for frequency, control device and convertible frequency air-conditioner | |
| CN106196474B (en) | Air conditioner intelligent control method | |
| CN104713196B (en) | Control method and device for variable frequency air conditioner refrigeration and variable frequency air conditioner | |
| CN104697109B (en) | Refrigeration control method, control device and variable frequency air conditioner | |
| CN105928136A (en) | Air conditioner energy conservation control method, air conditioner energy conservation control device and air conditioner | |
| CN105157170A (en) | Method for controlling variable frequency air conditioner | |
| CN106196441A (en) | Realize the method and device that air conditioner refrigerating controls | |
| CN106052009A (en) | Variable frequency air conditioner frequency control method and device | |
| CN105042796A (en) | Air conditioner control method | |
| CN106052011B (en) | Air conditioner refrigerating control method and control device | |
| CN106642549A (en) | Method and device for achieving refrigeration control of air conditioner based on distance | |
| CN105135612A (en) | Variable frequency air conditioner control method | |
| CN109631250A (en) | Air conditioning control method, device and air-conditioning | |
| CN106066080A (en) | A kind of method and device realizing refrigerating of convertible frequency air conditioner control based on distance | |
| CN106016599B (en) | A kind of method and device for realizing air conditioner refrigerating control based on distance | |
| CN106610087A (en) | Air conditioner refrigeration control achieving method and device | |
| CN106052014A (en) | Air conditioner energy saving control method and device based on distance and air conditioner | |
| CN106839256A (en) | The method and device of air conditioner refrigerating control is realized based on distance | |
| CN106679071A (en) | Method and device for realizing refrigeration control of air conditioner | |
| CN106196440B (en) | Air conditioner energy saving control method, control device and air-conditioning | |
| CN105091243A (en) | Air conditioner control method | |
| CN105928158A (en) | Control method and control device for frequency of variable frequency air conditioner | |
| CN106052010A (en) | Variable frequency air conditioner refrigeration control method and device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |