CN105605748A - Wind-water joint adjusting control method and system for air conditioning system - Google Patents
Wind-water joint adjusting control method and system for air conditioning system Download PDFInfo
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- CN105605748A CN105605748A CN201610146682.6A CN201610146682A CN105605748A CN 105605748 A CN105605748 A CN 105605748A CN 201610146682 A CN201610146682 A CN 201610146682A CN 105605748 A CN105605748 A CN 105605748A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
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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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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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
- F24F11/70—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
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/50—Air quality properties
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Mechanical Engineering (AREA)
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- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Quality & Reliability (AREA)
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- Air Conditioning Control Device (AREA)
Abstract
The invention relates to the field of air conditioning, in particular to a wind-water joint adjusting control method and system for an air conditioning system. The wind-water joint adjusting control system comprises a controller, a water valve adjuster, a draught fan adjuster, a surface cooler and a temperature and air quality detection device. When the wind-water joint adjusting control system is used for treating indoor air, the heat exchange effect of the surface cooler is changed by adjusting the chilled water flow and the air output at the same time, the detection device acquires temperature and air quality information of the indoor air and feeds the temperature and air quality information of the indoor air back to the controller, and the controller generates an instruction according to checking information, adjusts the opening degree of a water valve of the surface cooler and the air output of the surface cooler, and controls the indoor temperature within a given range. By the adoption of the wind-water joint adjusting control method, on the premise of meeting the requirement of an indoor environment, energy consumption of an air blower of the surface cooler and running energy consumption of an air conditioning water system are effectively reduced, running stability of the central air conditioning system is improved, adjusting time is shortened, and conform for a user is improved.
Description
Technical field
The present invention relates to filed of air conditioning, be specifically related to a kind of air-conditioning system geomantic omen uniting and adjustment control method and beSystem.
Background technology
The energy-conservation annual developmental research report statistics data of Chinese architecture show, end equipment of central air conditioner system fortuneRow energy consumption, higher than chilled water pump, cooling water pump and cooling tower energy consumption, accounts for the ratio of system energy consumption up to 1/3, hasThe operation energy consumption of effect reduction end equipment of central air conditioner system is significant to air conditioner system energy saving.
Surface-cooler is the vitals of end equipment of central air conditioner system, and outdoor air is through surface-coolerAfter hot wet process, send into user indoor, meet the requirement of user's comfortableness, change the current of the surface-cooler of flowing throughAmount and air output all can change the air supply parameter of heat exchanger output; If changing end-equipment surface coolWhen device chilled-water flow, also can change the air quantity of the heat exchanger of flowing through, can obtain better energy-saving effectAnd comfortableness; But because chilled-water flow and the air quantity of while reconciliation statement aerator are complicated heat exchangeProcess, degree of coupling is high each other, realizes physics decoupling zero control very difficult, for avoiding the coupling of adjustment processClosing property, adopts the single parameter pattern of regulating at present substantially, in engineering application general adopt air output constant,The mode of the chilled-water flow of reconciliation statement aerator; In the time of operation at part load, by regulating surface coolThe chilled-water flow of device changes air supply parameter, is meeting under the prerequisite of user to fixed temperature, reduces chilled water flowAmount, and then reduce air-conditioning system refrigeration host computer energy consumption and water pump conveying energy consumption.
Theory analysis shows, surface-cooler heat transfer process has saturation nonlinearity characteristic, if air output is notBecome, after discharge increases to a certain degree, affect hardly surface-cooler wind pushing air temperature; IfDischarge is constant, after air mass flow increases to a certain degree, also affects hardly air exit temp, adoptsBy the mode that regulates chilled-water flow, if equipment operates in saturation region, regulate chilled-water flow to air-supplyThe impact of parameter is slow, and the adjusting time is long, affects user's comfortableness; If chilled-water flow is reduced to lineProperty district, although can reduce air-conditioner water system transmission energy consumption, may there is cooling deficiency, and frequentlyRegulate end-equipment chilled-water flow, be unfavorable for system stable operation, can affect the performance of refrigeration host computer, fallInefficient.
Before address, regulate the air output of surface-cooler of flowing through also can change surface-cooler air supply parameter;Chilled-water flow is different from regulating, and regulates air output only to relate to end-equipment itself, and other are established not affect systemStandby and pipe network water dynamic balance is less on system stable operation impact; In the time of operation at part load, if adoptedFrequency control way control pressure fan, according to similarity law, reduces end-equipment air output and can obtain obviouslyEnergy-saving benefit; If regulate call by pattern to work as, in regulating end-equipment chilled-water flow, also regulateAir output, both can obtain the energy saving profit that reduces chilled-water flow, also can obtain and reduce the energy-conservation of air outputIncome, and can improve the stability of a system, reduce the adjusting time, promote user's comfortableness.
Along with energy saving in running requires to improve and control technology development, frequency control way is very universal, withTime to regulate chilled-water flow and air output be that further to reduce the operation of end-equipment operation energy consumption, improvement system steadyApproach qualitatively. Realize this target, key is to seek suitable, feasible solution surface-cooler currentAmount and the control method of air output at the coupled problem of heat transfer process.
Summary of the invention
For above-mentioned defect, the object of the invention is to propose a kind of air-conditioning system geomantic omen uniting and adjustment control method andSystem, regulate chilled-water flow and air output is further to reduce end-equipment operation energy consumption, improve to be simultaneouslyThe approach of system operation stability.
For reaching this object, the present invention by the following technical solutions:
A kind of air-conditioning system geomantic omen uniting and adjustment control method, comprises the steps:
1) initial parameter is set: initial parameter comprises that given temperature T and temperature allow difference △ T, alsoSet given air quality parameters C, met the minimum rotation speed of fan that air-supply requires;
2) start and regulate cooling water valve and blower fan: the cooling water valve of air conditioner surface cooler is reached to maximumValue, and the rotation speed of fan of air conditioner surface cooler is reached to maximum;
3) detect and obtain indoor temperature Ts and IAQ Cs;
4) be Ta with regard to given temperature T with the absolute value of the difference of actual measurement indoor temperature Ts, and compare Ta and △ TContrast;
5) when Ta >=△ T: and actual measurement indoor temperature Ts is more than or equal to given temperature T-△ T and TsPoor, regulate chilled water valve opening F and rotation speed of fan N;
Further, described step 4) also comprise step 6): in the time of Ta < △ T, first keep cooling water to work asFront aperture, afterwards according to the poor rotation speed of fan that regulates of T and Ts, and detects IAQ Cs and givesWhether the relation of determining between air quality C is Cs >=C, when Cs < C repeats this step, until after Cs >=CMaintain current rotation speed of fan.
Preferably, described step 4) also comprise step 7): when Ta >=△ T, when actual measurement indoor temperature, Ts is littleIn given temperature T, and rotation speed of fan is not greater than or equal to minimum speed, according to (T-△ T) and Ts'sThe poor chilled water valve opening that regulates.
Further, described step 4) also comprise step 8): when Ta >=△ T, as actual measurement indoor temperature TsBe less than given temperature T, rotation speed of fan is more than or equal to minimum speed, indoor with actual measurement according to given temperature TThe poor rotation speed of fan that regulates of temperature T s, and detect between IAQ Cs and given air quality CRelation whether be Cs >=C, when Cs < C repeats this step, until maintain current rotation speed of fan after Cs >=C.
A kind of air-conditioning system geomantic omen uniting and adjustment control system, is characterized in that, comprising:
Master controller: allow difference △ T and given temperature T for design temperature, and there is Data Collection fortuneCalculate and instruction sending function;
Water valve adjuster: for receiving and carry out the instruction of master controller, and have and adjust water valve apertureFunction;
Fan Regulation device: for receiving and carry out the instruction of master controller, and there is continuous adjusting blower fan and turnThe function of speed;
Surface-cooler: produce temperature also by the chilled water of processing water valve output and the wind of blower fan outputBe delivered in air-conditioned room;
Temperature and air detecting device: the temperature in real-time collecting air-conditioned room and the state of air quality, and willData are reacted in master controller, so that master controller generates suitable control data timely;
Said system and for the method for this system in the time adjusting temperature, adopted and regulated chilled-water flow simultaneouslyWith the mode of air output, this measure is in order further to reduce end-equipment operation energy consumption, the operation of improvement system surelyQualitative.
Brief description of the drawings
Fig. 1 is the air-conditioning system geomantic omen uniting and adjustment control system block diagram of an embodiment of the present invention;
The flow chart of the air-conditioning system geomantic omen uniting and adjustment control method of Fig. 2 embodiment of the present invention.
Detailed description of the invention
Further illustrate technical scheme of the present invention below in conjunction with accompanying drawing and by detailed description of the invention.
With reference to accompanying drawing 2, a kind of air-conditioning system geomantic omen uniting and adjustment control method, comprises the steps:
1) initial parameter is set: initial parameter comprises that given temperature T and temperature allow difference △ T, alsoSet given air quality parameters C, and rotation speed of fan is low gear;
2) start and regulate cooling water valve and blower fan: the cooling water valve of air conditioner surface cooler is reached to maximumValue, and the rotation speed of fan of air conditioner surface cooler is reached to maximum;
3) detect and obtain indoor temperature Ts and IAQ Cs;
4) be Ta with regard to given temperature T with the absolute value of the difference of actual measurement indoor temperature Ts, and compare Ta and △ TContrast;
5) when Ta >=△ T: and actual measurement indoor temperature Ts is more than or equal to given temperature T, according to indoorThe difference of temperature T s regulate cooling water valve until indoor temperature Ts in given temperature T.
6): when Ta < △ T: first keep the current aperture of cooling water, afterwards according to the poor blower fan that regulates of T and TsRotating speed, until detect that Ta is in the scope of △ T.
7): when Ta >=△ T, when actual measurement indoor temperature, Ts is less than given temperature T, and rotation speed of fan is littleIn or equal minimum speed, the poor chilled water valve opening that regulates with Ts according to (T-△ T).
8): when Ta >=△ T, when actual measurement indoor temperature, Ts is less than given temperature T, and rotation speed of fan is greater thanOr equal minimum speed, regulate rotation speed of fan according to given temperature T and the difference of actual measurement indoor temperature Ts.
Preferably, described step 1) also set given air quality parameters C; Described step 3) in also inspectionSurvey and obtained IAQ Cs.
Further, described step 6) in the time of Ta < △ T: first keep the current aperture of cooling water, basis afterwardsThe poor rotation speed of fan that regulates of T and Ts, and detect between IAQ Cs and given air quality CRelation whether be Cs >=C, when Cs < C repeats this step, until maintain current rotation speed of fan after Cs >=C.
Further, described step 8) when Ta >=△ T, when actual measurement indoor temperature, Ts is less than given temperature T,Rotation speed of fan is more than or equal to minimum speed, poor adjusting the with actual measurement indoor temperature Ts according to given temperature TRotation speed of fan, and whether the relation detecting between IAQ Cs and given air quality C is Cs>=C, when Cs < C repeats this step, until maintain current rotation speed of fan after Cs >=C.
Single argument negative feedback mode regulates respectively chilled-water flow and air output, obtains better comfortableness and jointCan effect, reach 60% when above of design discharge at chilled-water flow, the heat exchange amount of surface exchanger reaches80% left and right of metered flow, continue increase chilled-water flow less on the impact of wind pushing temperature, and air-supplyTemperature changes corresponding slower to chilled-water flow, preferentially regulate chilled-water flow, complies with as controlling taking indoor temperatureAccording to, indoor temperature is remained in the target temperature range of permission; Then utilize surface cooler heat exchange amount to air-supplyThe feature of quantitative change fast response time, regulates air output, makes indoor temperature reach target temperature. Can be oneDetermine in scope, can adopt single argument negative feedback mode to regulate respectively chilled-water flow and air output, obtain moreGood comfortableness and energy-saving effect.
With reference to accompanying drawing 2, a kind of air-conditioning system geomantic omen uniting and adjustment control method, comprising:
Master controller: allow difference △ T and given temperature T for design temperature, and there is Data Collection fortuneCalculate and instruction sending function;
Water valve adjuster: for receiving and carry out the instruction of master controller, and have and adjust water valve apertureFunction;
Fan Regulation device: for receiving and carry out the instruction of master controller, and there is continuous adjusting blower fan and turnThe function of speed;
Surface-cooler: produce temperature also by the chilled water of processing water valve output and the wind of blower fan outputBe delivered in air-conditioned room;
Temperature and air detecting device: the temperature in real-time collecting air-conditioned room and the state of air quality, and willData are reacted in master controller, so that master controller generates suitable control data timely, theseThe combination of device can also be entered to IAQ whole system in having possessed temp regulating functionRow is adjusted, and to adjust the adjustment mode of equipment be that variable feedback is adjusted automatically, after input user ideal value, establishesFor working at once, thereby make indoor temperature effect and air quality can allow user feel comfortably cool.
Embodiment 1
As shown in Figure 1-2, air-conditioning system geomantic omen uniting and adjustment control method and system, system comprises: master controller,Allow difference △ T and given temperature T for design temperature, and there is Data Collection computing and instruction transmission meritCan; Water valve adjuster, for receiving and carry out the instruction of master controller, fill order is adjusted water valve aperture;Fan Regulation device, for receiving and carry out the instruction of master controller, for adjusting rotation speed of fan; Surface coolDevice, is produced temperature and is delivered to air-conditioned room by the chilled water of processing water valve output and the wind of blower fan outputIn; Temperature and air detecting device, the temperature in real-time collecting air-conditioned room and the state of air quality, and willData are reacted in master controller, so that master controller generates suitable control data timely; In fortuneWith in, step 1) for initial parameter is set: 1) initial parameter is set: initial parameter comprises to fixed temperatureT and temperature allow difference △ T, have also set given air quality parameters C, and rotation speed of fan is low gear,These parameters need to be inputted in master controller, and master controller calculates for controlling it taking this parameter as benchmarkThe parameter of his device; Step 2) in start and regulate cooling water valve and blower fan: cold by air conditioner surface coolerBut penstock reaches maximum, and the rotation speed of fan of air conditioner surface cooler is reached to maximum, and surface is coldBut device starts to export cold air with this; Step 3) detect and obtain indoor temperature Ts and IAQ Cs,The actual indoor temperature situation that current needs refrigeration detected, this step is by being arranged at indoor and connecting and masterThe temperature of controller and Detection of Air Quality module realize; Step 4) with regard to given temperature T and actual measurement Indoor TemperatureThe absolute value of difference of degree Ts is Ta, and relatively Ta contrasts with △ T, master controller by contrast Ta and△ T determines that actual temperature difference Ta is whether in the scope in temperature franchise △ T; Step 5) in as Ta >=△ TTime, and actual measurement indoor temperature Ts is more than or equal to given temperature T, and master controller is according to indoor temperature TsDifference order water valve adjuster regulate cooling water valve until indoor temperature Ts in given temperature T, if notBe greater than and enter next step; In step 6) in the time of Ta < △ T, first keep the current aperture of cooling water, afterwardsMaster controller is according to the poor rotation speed of fan that regulates of T and Ts, and detection IAQ Cs and given skyWhether the relation between makings amount C is Cs >=C, when Cs < C repeats this step, until maintain after Cs >=CCurrent rotation speed of fan, otherwise repeat this step; In step 7) in, when Ta >=△ T, when actual measurement indoor temperatureTs is less than given temperature T, and rotation speed of fan is not greater than or equal to minimum speed, and master controller is according to (T-△ T) regulate chilled water valve opening with the poor of Ts, and this step of master controller cycle detection is until (T-△ T)Mate with Ts; Step 8): when Ta >=△ T, when actual measurement indoor temperature, Ts is less than given temperature T, and blower fan turnsSpeed is more than or equal to minimum speed, turns according to given temperature T and the poor blower fan that regulates of actual measurement indoor temperature TsSpeed, and whether the relation detecting between IAQ Cs and given air quality C be Cs >=C, whenCs < C repeats this step, until after Cs >=C, maintain current rotation speed of fan, because survey in this case chamberThe given temperature T of interior temperature T s is low, can make user feel cold, so master controller can circulate in this stepDetect until the temperature difference between Ts and T in the scope that allows difference △ T after, and maintain current state;Chilled water valve opening in system and the regulative mode of rotation speed of fan all adopt PI mode to adjust.
Reach 60% when above of design discharge at chilled-water flow, the heat exchange amount of surface exchanger has reached volume80% left and right of constant flow, continues to increase chilled-water flow less on the impact of wind pushing temperature, and wind pushing temperatureChange corresponding slower to chilled-water flow; Under same operating mode, regulate surface exchanger air output to surface coolerThe impact of output load is larger, and wind pushing temperature is very fast to air output variation response speed; Therefore, oneUnder fixed service condition, can utilize wind pushing temperature to change and response speed chilled-water flow and air outputDifference, design suitable control strategy, adopt single argument negative feedback mode to reduce chilled-water flow and air-supplyThe coupling influence of amount effects on surface heat exchanger heat exchange, regulates indoor load to be divided into two stages, preferentially regulates coldFreeze discharge, taking indoor temperature as controlling foundation, indoor temperature is remained in the target temperature range of permission;Then utilize surface cooler heat exchange amount air output to be changed to the feature of fast response time, regulate air output, make indoorTemperature reaches target temperature. Can within the specific limits, can adopt single argument negative feedback mode to regulate respectivelyChilled-water flow and air output, obtain better comfortableness and energy-saving effect.
Know-why of the present invention has below been described in conjunction with specific embodiments. These are described just in order to explain thisThe principle of invention, and can not be interpreted as by any way limiting the scope of the invention. Based on hereinExplain, those skilled in the art does not need to pay performing creative labour can associate other tool of the present inventionBody embodiment, within these modes all will fall into protection scope of the present invention.
Claims (5)
1. an air-conditioning system geomantic omen uniting and adjustment control method, comprises the steps:
1) initial parameter is set: initial parameter comprises that given temperature T and temperature allow difference △ T, has also set given air quality parameters C, meets the minimum rotation speed of fan that air-supply requires;
2) start and regulate cooling water valve and blower fan: the cooling water valve of air conditioner surface cooler is reached to maximum, and the rotation speed of fan of air conditioner surface cooler is reached to maximum;
3) detect and obtain indoor temperature Ts and IAQ Cs;
4) be Ta with regard to given temperature T with the absolute value of the difference of actual measurement indoor temperature Ts, and relatively Ta and △ T contrast;
It is characterized in that:
5) when Ta >=△ T: and actual measurement indoor temperature Ts is more than or equal to the poor of given temperature T-△ T and Ts, adjusting chilled water valve opening F and rotation speed of fan N.
2. air-conditioning system according to claim 1 geomantic omen uniting and adjustment control method, it is characterized in that, described step 4) also comprise step 6): in the time of Ta < △ T, first keep the current aperture of cooling water, afterwards according to the poor rotation speed of fan that regulates of T and Ts, and whether the relation detecting between IAQ Cs and given air quality C is Cs >=C, when Cs < C repeats this step, until maintain current rotation speed of fan after Cs >=C.
3. air-conditioning system according to claim 1 geomantic omen uniting and adjustment control method, it is characterized in that, described step 4) also comprise step 7): when Ta >=△ T, when actual measurement indoor temperature, Ts is less than given temperature T, and rotation speed of fan is not greater than or equal to minimum speed, the poor chilled water valve opening that regulates with Ts according to (T-△ T).
4. air-conditioning system according to claim 1 geomantic omen uniting and adjustment control method, it is characterized in that, described step 4) also comprise step 8): when Ta >=△ T, when actual measurement indoor temperature, Ts is less than given temperature T, rotation speed of fan is more than or equal to minimum speed, the poor rotation speed of fan that regulates with actual measurement indoor temperature Ts according to given temperature T, and whether the relation detecting between IAQ Cs and given air quality C is Cs >=C, when Cs < C repeats this step, until maintain current rotation speed of fan after Cs >=C.
5. an air-conditioning system geomantic omen uniting and adjustment control system, is characterized in that, comprising:
Master controller: allow difference △ T and given temperature T for design temperature, and there is Data Collection computing and instruction sending function;
Water valve adjuster: for receiving and carry out the instruction of master controller, and there is the function of adjusting water valve aperture;
Fan Regulation device: for receiving and carry out the instruction of master controller, and there is the function of continuous adjusting rotation speed of fan;
Surface-cooler: produce temperature and be delivered in air-conditioned room by the chilled water of processing water valve output and the wind of blower fan output;
Temperature and air detecting device: the temperature in real-time collecting air-conditioned room and the state of air quality, and data are reacted in master controller, so that master controller generates suitable control data timely.
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| CN108317685A (en) * | 2018-01-31 | 2018-07-24 | 深圳市奥宇节能技术股份有限公司 | A kind of air conditioning control method and air-conditioning equipment terminal |
| CN108317685B (en) * | 2018-01-31 | 2021-02-05 | 深圳市奥宇节能技术股份有限公司 | Air conditioner control method and air conditioner terminal |
| CN113074434A (en) * | 2021-05-13 | 2021-07-06 | 南京天加环境科技有限公司 | Control method for direct-current brushless fan coil unit |
| CN113074434B (en) * | 2021-05-13 | 2023-02-24 | 南京天加环境科技有限公司 | Control method for direct-current brushless fan coil unit |
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