WO2016065874A1 - 一种具有抽风或者送风功能的电器设备的恒风量控制方法 - Google Patents
一种具有抽风或者送风功能的电器设备的恒风量控制方法 Download PDFInfo
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- WO2016065874A1 WO2016065874A1 PCT/CN2015/077456 CN2015077456W WO2016065874A1 WO 2016065874 A1 WO2016065874 A1 WO 2016065874A1 CN 2015077456 W CN2015077456 W CN 2015077456W WO 2016065874 A1 WO2016065874 A1 WO 2016065874A1
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- air volume
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B17/00—Systems involving the use of models or simulators of said systems
- G05B17/02—Systems involving the use of models or simulators of said systems electric
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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
- F24F11/75—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 for maintaining constant 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
- 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
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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
Definitions
- the invention relates to a constant air volume control method for an electric appliance having a function of drawing air or blowing air.
- Constant air volume control can provide users with a constant air volume under these conditions, thus maintaining comfortable ventilation, cooling or heating effects under a wide range of static pressure conditions, and making the system operation energy efficient.
- the general constant air volume control method is to directly install the air flow meter, which not only increases the cost, but also brings potential control failure due to the failure of the air flow meter.
- air conditioner manufacturers usually adopt a constant air volume control method without a wind meter, and some have to monitor the static pressure. The change is to adjust the speed.
- Some calculation formulas involve logarithmic calculation or high-order polynomial, which requires the MCU of the motor controller to have a relatively large calculation capacity, which further increases the cost.
- the constant air volume control mainly relies on the motor controller inside the PM motor, the PM motor is the abbreviation of the DC brushless permanent magnet synchronous motor, which can also be called the ECM motor, the PM motor has the motor controller, and the motor controller is installed.
- the motor controller On the motor unit, the motor controller is installed in the air duct of the electrical equipment together with the motor unit, the motor controller will occupy part of the space inside the air duct, affecting the air supply efficiency of the electrical equipment, and the volume of the DC motor is relatively Larger, it will cause installation troubles, and the manufacturing cost of the motor controller is relatively high, which affects its market competitiveness.
- the object of the present invention is to provide a constant air volume control method for an electric appliance having a function of drawing or blowing air, using a motor unit without a controller, and the main constant air volume control method is concentrated on the system controller
- the main control circuit board, and the algorithm is simple, which greatly saves costs and simplifies product structure.
- a constant air volume control method for an electric appliance having a function of exhausting or blowing air the electric appliance comprises a motor, a wind wheel, a power supply part and a system controller, and the system controller has a main control circuit board for realizing the function of the electric equipment itself
- the main control circuit board driving motor drives the wind wheel to rotate, wherein: the motor unit is a motor unit without a controller, including a rotating shaft, a permanent magnet rotor assembly, a stator assembly and a casing assembly, and a permanent magnet rotor assembly.
- a permanent magnet is mounted thereon, the permanent magnet rotor assembly and the stator assembly form a magnetic coupling, and the stator assembly includes a stator core and a coil winding wound on the stator core;
- the main control circuit board is provided with a microprocessor and a reverse
- the variable circuit and the motor operating parameter detecting circuit, the operating parameter detecting circuit inputs the real-time running parameter of the motor to the microprocessor, the output end of the microprocessor controls the inverter circuit, and the output end of the inverter circuit is connected with the coil winding; the characteristic is:
- the control method includes the following steps:
- the plurality of air volume points CFMi described above include the maximum output air volume and the minimum output air volume.
- the speed point n1 corresponds to Q11, Q21
- the speed point n2 corresponds to Q12, Q22
- the speed point n3 corresponds to Q13, Q23;
- Step 2) Calculate the weight value: Using the weight value to calculate the values Q01, Q02 and Q03 of Q0 in the constant air volume control function of the three speed points n1, n2, n3 corresponding to the target air volume value IN-CFM,
- the above-mentioned electrical equipment is an air conditioning system
- the main control circuit board is the main control board of the air conditioner controller
- the main control board of the air conditioner controller is also connected with the compressor and the expansion valve and the like.
- the electrical equipment mentioned above is a range hood
- the main control circuit board is a main control panel of the range hood
- the main control panel of the range hood further comprises a display circuit and a key input circuit, a display circuit and a key input circuit and a microprocessor. connection.
- the M air volume points described above refer to at least five.
- the invention has the following effects:
- the algorithm is simple, and the motor unit without the controller is used.
- the main constant air volume control method is concentrated on the system controller.
- the main control circuit board which greatly saves costs and simplifies the product structure.
- Figure 1 is a schematic structural view of the present invention
- Figure 2 is a perspective view of the motor unit of the present invention
- Figure 3 is a cross-sectional view of the motor unit of the present invention
- FIG. 4 is a schematic view showing the installation of an air conditioner application according to Embodiment 1 of the present invention.
- FIG. 5 is a block diagram showing an implementation circuit of the present invention.
- Embodiment 6 is a control flow chart of Embodiment 1 of the constant air volume control method of the present invention.
- FIG. 9 is a diagram showing a constant air volume control function for solving an arbitrary input air volume by using an interpolation method according to an embodiment of the present invention.
- Figure 10 is a schematic view showing the installation of the second embodiment of the constant air volume control method of the present invention.
- Figure 11 is a schematic block diagram of a second embodiment of the present invention.
- Figure 12 is a curve fitting diagram of Embodiment 2 of the present invention.
- FIG. 13 is a detailed block schematic diagram of Embodiment 3 of the present invention.
- an air blowing system such as a gas stove or an air handler
- the figure is replaced by "motor unit + wind wheel" in the pipeline.
- the air filter When the motor starts, the air blows. Since the number of air outlets and air inlets is related to the number of rooms, there is no uniform standard for the design of the pipeline. At the same time, the air filter may have different pressure drops. A constant air volume must have a good technical solution.
- the invention relates to a constant air volume control method for an electric appliance with a ventilation or air supply function
- the electric appliance comprises a motor, a wind wheel, a power supply part and a system controller
- the system controller has a main function for realizing the function of the electric device itself
- Control circuit board the main control circuit board drive motor drives the wind wheel to rotate
- the motor unit is a motor unit without a controller, including a rotating shaft, a permanent magnet rotor assembly, a stator assembly and a casing assembly, forever
- a permanent magnet is mounted on the magnetic rotor assembly, the permanent magnet rotor assembly and the stator assembly form a magnetic coupling
- the stator assembly includes a stator core and a coil winding wound on the stator core
- the main control circuit board is arranged with a micro processing
- the inverter, the inverter circuit and the motor operating parameter detecting circuit, the operating parameter detecting circuit inputs the real-time running parameter of the motor to the microprocessor, the output end of the microprocessor
- the motor is a motor unit 1, and the motor unit 1 includes a stator assembly 12, a rotor assembly 13 and a casing assembly 11, and the stator assembly 13 is mounted on the casing assembly 11, the motor unit
- the body 1 is mounted with a Hall sensor 14 (shown in Figure 5) for detecting the position of the rotor.
- the rotor assembly 13 is assembled inside or outside the stator assembly 12.
- the rotor position measuring circuit detects the rotor position signal and inputs it to the microprocessor, bus current.
- the detecting circuit inputs the detected bus circuit to the microprocessor, the bus voltage detecting circuit inputs the DC bus voltage to the microprocessor, the microprocessor controls the inverter circuit, and the inverter circuit controls the on and off of the coil windings of the respective phases of the stator assembly 12. Electricity.
- the plurality of air volume points CFMi described above include the maximum output air volume and the minimum output air volume.
- Step 2) Calculate the weight value: Using the weight value to calculate the values Q01, Q02 and Q03 of Q0 in the constant air volume control function of the three speed points n1, n2, n3 corresponding to the target air volume value IN-CFM,
- the electrical equipment of the present invention is an air conditioner, which has an air conditioning system controller, the system controller has a main control circuit board for realizing the function of the air conditioner itself, and the main control circuit board is arranged with a microprocessor.
- the inverter circuit and the motor running parameter detecting circuit, the operating parameter detecting circuit inputs the real-time running parameter of the motor to the microprocessor, the output end of the microprocessor controls the inverter circuit, and the output end of the inverter circuit is connected with the coil winding.
- the air conditioning system controller adopts a direct power control constant air volume control method
- the motor drives the wind wheel and has a stator assembly and a permanent magnet rotor assembly
- the main control circuit board layout has a microprocessor, Inverter circuit, bus current detecting circuit, bus voltage detecting circuit and motor input power control circuit (not shown), rotor position measuring circuit detects rotor position signal and inputs it to microprocessor, and microprocessor calculates according to rotor position signal
- the real-time speed n of the motor, the bus current detecting circuit inputs the bus current to the microprocessor, the bus voltage detecting circuit inputs the DC bus voltage to the microprocessor, the microprocessor controls the inverter circuit, and the inverter circuit controls the stator components.
- the phase coil winding is turned off and on, and the control steps are as follows:
- Step F if the power increment value ⁇ P is greater than or equal to the set value P set ; the power/speed control logic will calculate whether the operation time of the speed loop is reached; if the operation time of the speed loop is not reached, the existing working point is maintained;
- the motor In the actual static pressure range, in the process of adjusting the static pressure, the motor is controlled at constant speed, and the air volume is kept as the target air volume by adjusting the motor speed n and the real-time input power of the motor Pi, and the steady state speed n of the motor and the corresponding are recorded.
- the interpolation function may be used to calculate a function corresponding to any external input target air volume value IN-CFM. f(n). The constant air volume control of the arbitrary target air volume is realized.
- a control model is developed that, when product control determines the air volume requirement, provides a constant air volume CFM at a specific static pressure by controlling power and speed.
- the characteristic curve represents the constant wind volume physical characteristics that maintain control power and speed.
- the process of curve fitting is to select a polynomial to describe the curve, and the coefficients of the polynomial can be obtained by the least squares method.
- Figure 8 is a plot of the experimental data of the direct power control constant air volume of a 1/3HP motor unit in a small pipe air conditioning system. For a given target airflow, the system selects some typical air volume CFM as a test point. A database is used to build a mathematical model. These typical points include the minimum and maximum air volume values, with some intermediate points added. According to the product specifications, the typical air volume CFM has five test points, 150/300/450/600 and 750 CFM.
- Table 2 shows an example of the test data results.
- the speed of the motor ranges from 200 to 1400 rpm; the static pressure of the system ranges from 0.1 to 1 H 2 O. Maintain the preset constant air volume CCFM output and obtain a value corresponding to the motor input power of Figure 10 to form a database.
- each predetermined CFM wind volume corresponds to a quadratic function of power and speed, obtained in a standard calculation method: these equations define the power and the speed of the operating point of any system at a particular static pressure.
- the motor system defines a function corresponding to it, and the trajectory of its working point follows the function definition. Equations (3) through (7) can be expressed as a standard equation, and C1, C2, and C3 are constants.
- Pi p 2i + w ⁇ (p 1i - p 2i ).
- the weight value W is calculated like this:
- the coefficients of C1, C2 and C3 can be calculated. Therefore, the power equation can be obtained for any required input air volume IN-CFM. Since this process is completed by the microprocessor---the microcontroller in the air-conditioning system controller, the power calculation does not need to consume more real-time CPU resources.
- direct power control DPC uses the speed control to achieve power control.
- the function of the power/speed control logic is to coordinate the power/speed loop time constant to ensure system stability. Control can be controlled by controlling the precise control of the motor and torque control.
- the input power is calculated from the DC bus voltage and the DC bus current.
- the power and speed will be limited to the maximum power P max and the speed n max .
- the electrical equipment of the present invention is a range hood, which has a range hood system controller, and the system controller has a main control circuit board for realizing the function of the range hood itself, and the main control circuit
- the board layout has a microprocessor, an inverter circuit, a motor operating parameter detecting circuit, an independent power supply circuit, a gear input circuit and a display circuit, a gear input circuit and a display circuit are connected to the microprocessor, and the operating parameter detecting circuit drives the motor.
- the real-time operating parameters are input to the microprocessor, and the output of the microprocessor controls the inverter circuit, and the output of the inverter circuit is connected to the coil winding.
- the motor operating parameter detection circuit in the figure is a 3-phase current detecting circuit.
- the position of the rotor can be derived by detecting the three-phase current, and the vector control method is adopted. These are described in the textbook and the existing patent documents, and are not described here. More details will be described.
- the independent power supply circuit supplies power to each part of the circuit.
- the wind wheel is installed in the air duct.
- the oil smoke filter is installed in the air duct.
- the air duct has an air inlet and an air outlet.
- the motor is a motor unit 1, and the motor unit 1 includes a stator assembly 12, a rotor assembly 13 and a casing assembly 11, and the stator assembly 13 is mounted on the casing assembly 11, the rotor assembly.
- the set of 13 is formed on the inside or the outside of the stator assembly 12.
- the method for controlling the constant air volume of the range hood of the present invention is as follows:
- the m coefficient, resulting in a functional relationship T f(n).
- a control model is developed that, when product control determines the air volume requirement, provides a constant air volume CFM at a specific static pressure by controlling the torque and speed.
- the characteristic curve represents the constant wind volume physical characteristics that maintain control torque and speed. For all motor rated power ranges, for any type of design of the airflow system manufacturer, torque based test results and speed curves can be obtained.
- the process of curve fitting is to select a polynomial to describe the curve, and the coefficients of the polynomial can be obtained by the least squares method.
- any one of the target air volumes corresponds to a set of C 1 , C 2 and C 3 coefficients and is stored.
- the microprocessor checks the table according to the input target air volume value IN-CFM.
- the method of the first embodiment is the same as the method of the first embodiment.
- the electrical equipment of the present invention is a range hood, which has a range hood system controller, and the system controller has a main control circuit board for realizing the function of the range hood itself, and the main control circuit board layout
- a microprocessor an inverter circuit, a motor operating parameter detecting circuit, an independent power supply circuit, a gear input circuit and a display circuit, a gear input circuit and a display circuit are connected with the microprocessor, and the operating parameter detecting circuit drives the motor in real time.
- Input to the microprocessor, the output of the microprocessor controls the inverter circuit,
- the output of the inverter circuit is connected to the coil winding.
- the motor running parameter detection circuit in the figure includes a Hall sensor.
- the Hall sensor is mounted on the motor unit to detect the rotor position.
- the motor running parameter detecting circuit can detect the position of the rotor, and the independent power circuit supplies power to each part of the circuit.
- the wheel is installed inside the air duct, and a fume filter net is installed in the air duct, and the air duct has an air inlet and an air outlet.
- the microprocessor is also connected to the bus current detecting circuit to perform constant air volume control by detecting the bus current.
- the motor is a motor unit 1, and the motor unit 1 includes a stator assembly 12, a rotor assembly 13 and a casing assembly 11, and the stator assembly 13 is mounted on the casing assembly 11, the rotor assembly.
- the set of 13 is formed on the inside or the outside of the stator assembly 12.
- the method for controlling the constant air volume of the range hood of the present invention is as follows:
- a control model is developed to provide a constant air volume CFM at a specific static pressure by controlling the DC bus current and speed when the product control determines the air volume requirement.
- the characteristic curve represents the constant air volume physical characteristics that maintain the DC bus current and speed.
- the rated power range of all motors can be concluded for any type of design of the airflow system manufacturer based on the DC bus current test results and speed curves.
- the process of curve fitting is to select a polynomial to describe the curve, and the coefficients of the polynomial can be obtained by the least squares method.
- the microprocessor obtains a corresponding set of C 1 according to the input target air volume value IN-CFM by table lookup.
- the method is the same as the method of the first embodiment.
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Air Conditioning Control Device (AREA)
- Control Of Positive-Displacement Air Blowers (AREA)
- Control Of Electric Motors In General (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
Description
CFM | C1 | C2 | C3 |
150 | 0.338 | -0.151 | 0.0458 |
300 | 0.4423 | -0.2113 | 0.0765 |
450 | 。。。 | 。。。 | 。。。 |
600 | 。。。 | 。。。 | 。。。 |
750 | 。。。 | 。。。 | 。。。 |
900 | 。。。 | 。。。 | 。。。 |
Claims (8)
- 一种具有抽风或者送风功能的电器设备的恒风量控制方法,所述的电器设备包括电机、风轮、电源部分和系统控制器,系统控制器带有实现电器设备本身功能的主控制线路板,主控制线路板驱动电机带动风轮转动,其中:所述的电机单体是一个不带控制器的电机单体,包括转轴、永磁转子组件、定子组件和机壳组件,永磁转子组件上安装永磁体,永磁转子组件和定子组件形成磁藕合,定子组件包括定子铁芯和卷绕在定子铁芯上的线圈绕组;所述的主控制线路板上布局有微处理器、逆变电路和电机运行参数检测电路,运行参数检测电路将电机实时运行参数输入到微处理器,微处理器的输出端控制逆变电路,逆变电路的输出端与线圈绕组连接;其特征在于:所述的控制方法包括如下步骤:A)在系统控制器的微处理器里面建立M个风量点CFMi对应的M个恒风量控制函数Qi=F(n),其中Q可以是输入功率或者是直流母线电流或者是力矩,n是电机的转速;i是整数,由1开始到M;B)微处理器接收或预设的目标风量值IN-CFM;C)启动电机,进入稳态后,比较M个风量点CFMi和目标风量值IN-CFM,确定目标风量值IN-CFM处于两个已知风量点CFMi和CFMi-1之间;D)利用确定的两个风量点CFMi和CFMi-1通过插值法计算出目标风量值IN-CFM对应的恒风量控制函数Q0=F(n);E)控制电机参数Q0和转速n,使电机按照恒风量控制函数Q0=F(n)的定义曲线运行,保证电器设备的风量吸入或者输出恒定。
- 根据权利要求1所述的一种具有抽风或者送风功能的电器设备的恒风量控制方法,其特征在于:上述所述的函数Qi=F(n)是这样获得的:先采集原始数据,在风道设备中,针对M个目标风量,从低静压一直调节到高静压,这个静压要能涵盖应用的实际静压范围,在调节静压的过程中,让电机处于恒转速控制,并通过调节电机转速n和参数Q保持风量为目标风量,并记录此时的电 机稳态转速n和对应的参数Q,这样,针对M个目标风量,都产生了一组转速n和参数Q,然后通过曲线拟合的方法产生M个目标风量中每一个目标风量对应一个函数Qi=F(n)。
- 根据权利要求1或2所述的一种具有抽风或者送风功能的电器设备的恒风量控制方法,其特征在于:若干个风量点CFMi包括最大的输出风量和最小的输出风量。
- 根据权利要求1或2所述的一种具有抽风或者送风功能的电器设备的恒风量控制方法,其特征在于:Qi=F(n)是一个二阶函数,每个目标风量点对应的函数Q=C1+C2×n+C3×n2。
- 根据权利要求4所述的一种具有抽风或者送风功能的电器设备的恒风量控制方法,其特征在于:目标风量值IN-CFM对应的恒风量控制函数Q0=F(n)是这样得到的:步骤一)选定3个转速点n1、n2、n3,这3个转速点n1、n2、n3代入两个风量点CFMi和CFMi-1对应的恒风量控制函数Qi=F(n)和Qi-1=F(n),得到6个值Q11、Q21、Q12、Q22、Q13、Q23,转速点n1对应Q11、Q21,转速点n2对应Q12、Q22,转速点n3对应Q13、Q23;Q01=Q21+W(Q11-Q21),Q02=Q22+W(Q12-Q22),Q03=Q23+W(Q13-Q23);步骤三)将3个转速点n1、n2、n3和与之对应的Q01、Q02和Q03代入函数Q=C1+C2×n+C3×n2,求解到系数C1、C2、C3。
- 根据权利要求1或2所述的一种具有抽风或者送风功能的电器设备的恒风量控制方法,其特征在于:所述的电器设备是一种空调系统,主控制线路板是空调控制器主控板,空调控制器主控板还与压缩机和膨胀阀等设备连接。
- 根据权利要求1或2所述的一种具有抽风或者送风功能的电器设备的恒风量控制方法,其特征在于:所述的电器设备是一种抽油烟机,主控制线路板是抽油烟机主控板,抽油烟机主控板还包括显示电路和按键输入电路,显示电路和按键输入电路与微处理器连接。
- 根据权利要求1或2所述的一种具有抽风或者送风功能的电器设备的恒风量控制方法,其特征在于:M个风量点指至少有5个。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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CA2950794A CA2950794C (en) | 2014-10-29 | 2015-04-24 | Method for controlling constant air volume of electrical device with air exhaust or air supply function |
MX2016016429A MX2016016429A (es) | 2014-10-29 | 2015-04-24 | Metodo para controlar el volumen constante de aire de un dispositivo electrico con funcion de salida de aire o de entrada de aire. |
US15/331,904 US10539939B2 (en) | 2014-10-29 | 2016-10-23 | Method for controlling constant air volume of electric device adapted to exhaust or supply air |
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CN201410598667.6 | 2014-10-29 | ||
CN201410598667.6A CN105629814B (zh) | 2014-10-29 | 2014-10-29 | 一种具有抽风或者送风功能的电器设备的恒风量控制方法 |
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US15/331,904 Continuation-In-Part US10539939B2 (en) | 2014-10-29 | 2016-10-23 | Method for controlling constant air volume of electric device adapted to exhaust or supply air |
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