Air conditioner constant air volume control method, electronic equipment, air conditioner and storage medium

Abstract

The invention relates to the technical field of air conditioners, particularly provides an air conditioner constant air volume control method, electronic equipment, an air conditioner and a storage medium, and aims to solve the technical problem of how to carry out constant air volume control on the air conditioner. In order to achieve the purpose, the method comprises the steps of obtaining the power and / or current of a fan, obtaining the actual air volume of an air outlet based on the power and / or current of the fan, judging whether the actual air volume is the same as the set air volume or not, and selectively adjusting the rotating speed of the fan based on the judgment result. Through the implementation mode, the air volume can be reversely checked according to the running power and / or current of the fan, and the air speed is timely adjusted when the actual air volume is different from the set air volume, so that the constant air volume control of the air conditioner is realized, and the use embodiment of a user is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to an air conditioning constant air volume control method, electronic equipment, an air conditioner and a storage medium. Background Art

[0002] With the improvement of living standards, the use of air conditioners is becoming more and more popular. However, air conditioners with ventilation ducts may become dirty and clogged over time and with the accumulation of dust, resulting in a decrease in the air intake of the air conditioner, which in turn causes the air output of the air conditioner fan to change at the same wind speed. In addition, due to space reasons, a longer duct may be required for air supply, which increases the loss along the way of air supply, reduces the amount of air reaching the air, and leads to user dissatisfaction.

[0003] Accordingly, the art needs a new technical solution to solve the above problems. Summary of the invention

[0004] In order to overcome the above-mentioned defects, the present invention is proposed to provide an air conditioner constant air volume control method, electronic device, air conditioner and storage medium that solve or at least partially solve the technical problem of how to control the constant air volume of an air conditioner.

[0005] In a first aspect, a method for controlling a constant air volume of an air conditioner is provided, the method comprising:

[0006] Obtain the power and / or current of the fan;

[0007] Obtaining actual air volume at an air outlet based on the power and / or current of the fan;

[0008] Determining whether the actual air volume is the same as the set air volume;

[0009] The fan speed is selectively adjusted based on the judgment result.

[0010] In a technical solution of the above-mentioned air conditioner constant air volume control method, the actual air volume of the air outlet is obtained based on the power and / or current of the fan, including:

[0011] Obtaining the actual air volume corresponding to the power and / or current of the fan based on an air volume control model or an air volume correspondence table;

[0012] Among them, the air volume control model is used to predict the relationship between the power and / or current of the fan, the outlet air volume and the fan speed; the air volume correspondence table includes multiple groups of the power and / or current of the fan, the outlet air volume and the fan speed.

[0013] In a technical solution of the above-mentioned air conditioner constant air volume control method, the method further includes:

[0014] Obtaining the relationship between the power and / or current of the fans, the air volume at the air outlets and the speed of the fans;

[0015] The air volume control model is established based on multiple groups of the relationships, or the air volume correspondence table is generated.

[0016] In a technical solution of the above-mentioned air conditioner constant air volume control method, the relationship between the power and / or current of the plurality of groups of fans, the air volume at the air outlet and the fan speed is obtained, including:

[0017] Based on the first preset static pressure value, obtaining a first fan speed, a first power and / or a first current corresponding to a plurality of preset air outlet air volumes;

[0018] Based on the plurality of preset air outlet air volumes and the corresponding first fan speeds, obtaining other multiple powers and / or currents corresponding to other multiple preset static pressure values;

[0019] Based on the other multiple preset static pressure values, the fan speed is adjusted and the outlet air volume is obtained. When the outlet air volume reaches the multiple preset outlet air volumes, the other multiple fan speeds corresponding to the multiple preset outlet air volumes are obtained.

[0020] In a technical solution of the above-mentioned air conditioner constant air volume control method, the selective adjustment of the fan speed based on the judgment result includes:

[0021] If the actual air volume is different from the set air volume, obtaining the air volume difference between the actual air volume and the set air volume, and adjusting the fan speed based on the air volume difference;

[0022] If the actual air volume is the same as the set air volume, the fan speed is not adjusted.

[0023] In a technical solution of the above-mentioned air conditioner constant air volume control method, the method further includes:

[0024] Using the multiple groups of the power and / or current of the fan, the air volume at the air outlet and the fan speed as training data sets;

[0025] The air volume control model is trained based on the training data set.

[0026] In a second aspect, the present invention provides an air conditioner constant air volume control device, the device comprising:

[0027] A first acquisition module, configured to acquire power and / or current of the wind turbine;

[0028] A second acquisition module, configured to acquire an actual air volume at an air outlet based on the power and / or current of the fan;

[0029] A determination module, configured to determine whether the actual air volume is the same as the set air volume;

[0030] The adjustment module is configured to selectively adjust the fan speed based on the determination result.

[0031] In a third aspect, a control device is provided, which includes a processor and a storage device, wherein the storage device is suitable for storing multiple program codes, and the program codes are suitable for being loaded and run by the processor to execute the air conditioning constant air volume control method described in any one of the technical solutions of the above-mentioned air conditioning constant air volume control method.

[0032] In a fourth aspect, an air conditioner is provided, which includes an air conditioner body and the electronic device described in the technical solution of the above electronic device.

[0033] In a fifth aspect, a computer-readable storage medium is provided, which stores a plurality of program codes, wherein the program codes are suitable for being loaded and run by a processor to execute the air conditioning constant air volume control method described in any one of the technical solutions of the above-mentioned air conditioning constant air volume control method.

[0034] The above one or more technical solutions of the present invention have at least one or more of the following Beneficial effects:

[0035] In the technical solution of the present invention, the power and / or current of the fan is first obtained, and the actual air volume at the air outlet is obtained based on the power and / or current of the fan, and then it is determined whether the actual air volume is the same as the set air volume, and the fan speed is selectively adjusted based on the determination result. Through the above implementation, the air volume can be checked according to the power and / or current of the fan operation, and the wind speed can be adjusted in time when the actual air volume is different from the set air volume, thereby realizing the control of the constant air volume of the air conditioner and improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The disclosure of the present invention will become more easily understood with reference to the accompanying drawings. It is easy for those skilled in the art to understand that these drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present invention. In addition, similar numbers in the figures are used to represent similar components, among which:

[0037] Figure 1 is a flow chart of main steps of a method for controlling constant air volume of an air conditioner according to an embodiment of the present invention;

[0038] Figure 2 is a control principle diagram of a permanent magnet synchronous motor driven by a position sensorless fan according to an embodiment of the present invention;

[0039] Figure 3is a schematic diagram of air conditioning control principle according to an embodiment of the present invention;

[0040] Figure 4 is a flow chart of main steps of a method for controlling constant air volume of an air conditioner according to another embodiment of the present invention;

[0041] Figure 5 It is a flowchart of main steps for obtaining the relationship between the power and / or current of multiple groups of fans, the air volume at the air outlet and the fan speed according to one embodiment of the present invention;

[0042] Figure 6 is a schematic diagram of an automated testing tool according to an embodiment of the present invention;

[0043] Figure 7 is a flow chart of main steps of a method for controlling constant air volume of an air conditioner according to another embodiment of the present invention;

[0044] Figure 8 is a schematic diagram of a constant air volume control principle of an air conditioner according to an embodiment of the present invention;

[0045] Fig. 9 is a main structural block diagram of an air conditioner constant air volume control device according to an embodiment of the present invention;

[0046] Fig.10 It is a schematic diagram of the main structure of an electronic device according to an embodiment of the present invention.

[0047] List of reference numerals:

[0048] 301: controller; 3011: fan control module; 3012: fan drive module; 302: fan; 601; test equipment; 602: static pressure control equipment; 603: controller; 604: fan; 605: air volume meter; 901: first acquisition module; 902: second acquisition module; 903: judgment module; 904: adjustment module; 1001: processor; 1002: storage device. DETAILED DESCRIPTION

[0049] Some embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0050] In the description of the present invention, "module" and "processor" may include hardware, software or a combination of the two. A module may include hardware circuits, various suitable sensors, communication ports, and memories, and may also include software parts, such as program codes, or a combination of software and hardware. The processor may be a central processing unit, a microprocessor, an image processor, a digital signal processor, or any other suitable processor. The processor has data and / or signal processing functions. The processor may be implemented in software, hardware, or a combination of the two. Non-temporary computer-readable storage media include any suitable medium that can store program codes, such as a magnetic disk, a hard disk, an optical disk, a flash memory, a read-only memory, a random access memory, and the like. The term "A and / or B" means all possible combinations of A and B, such as only A, only B, or A and B. The term "at least one A or B" or "at least one of A and B" has a similar meaning to "A and / or B", and may include only A, only B, or A and B. The singular terms "one" and "the" may also include plural forms.

[0051] Here we first explain some terms involved in the present invention.

[0052] Static pressure: In the ventilation system, the static pressure at the air outlet refers to the pressure of air when it flows out of the ventilation duct or equipment and enters the room. It is a pressure value calculated from the air volume output by the fan and the outlet area, usually expressed in Pascal (Pa). The static pressure at the air outlet can reflect the relationship between the speed and pressure of air flow, and is an important indicator to measure the working effect of the ventilation system.

[0053] Drag coefficient: It describes the amount of resistance an object encounters when moving in the air.

[0054] Position sensorless: refers to a sensor that uses motor characteristics to estimate and determine the motor rotor position.

[0055] Permanent magnet synchronous motor (PMSM): a synchronous motor that uses permanent magnets as the source of the rotor magnetic field. It uses the principle that permanent magnets generate magnetic fields on the rotor and interact with the stator windings through electromagnetic fields to achieve energy conversion.

[0056] Space Vector Pulse Width Modulation (SVPWM): The main idea is to use the ideal stator flux circle of a three-phase symmetrical motor when powered by a three-phase symmetrical sinusoidal voltage as a reference standard, and to make appropriate switches in different switching modes of the three-phase inverter to form a PWM wave, and to use the actual flux vector formed to track its accurate flux circle.

[0057] As described in the background technology, air conditioners that use ventilation ducts may have problems with dirty and clogged air ducts over time and with the accumulation of dust, resulting in a decrease in the air intake of the air conditioner, which in turn causes the air output of the air conditioner fan to change at the same wind speed. It may also be necessary to use a longer duct for air supply due to space reasons, which increases the loss along the way of air supply, reduces the amount of air reaching the air, and causes dissatisfaction among users.

[0058] Therefore, it is crucial to perform constant air volume control on the air conditioner. In the constant air volume control technology, the most critical thing is to judge the static pressure at the air outlet of the air conditioner in order to correct the fan speed and achieve constant air volume control.

[0059] Existing constant air volume control methods include the design and implementation of a constant air volume controller for a wind turbine without a wind speed sensor and dynamic constant air volume control based on a load torque observer.

[0060] Among them, the design and implementation of the constant air volume controller for the fan without wind speed sensor mainly include: when a constant output power is given, the motor speed is a constant value. If the drag coefficient is changed, the fan motor speed will change at the same output power. The fan motor speed at the same output power can reflect the wind resistance coefficient of the air duct. Since the wind resistance coefficient and the fan motor speed are not linearly related, after knowing the wind resistance coefficient, it can be obtained by checking N test -N out The required fan motor speed is obtained by using the table method, and the preset air volume output is achieved by adjusting the fan motor speed. test is the actual speed, N out is the set speed, N test -N out The table is a comparison table between the tested fan motor speed and the actual required speed. The table is different for different fans. test -N out The data in the table can be obtained through calculation according to the specific fan, and the calculated value can be appropriately corrected by experiment when necessary, which can generally meet the requirements of constant air volume control accuracy of the fan.

[0061] Furthermore, under the premise that the duct characteristics remain relatively unchanged during each operation of the fan, that is, the system's wind resistance coefficient is constant and the preset air volume output is also a single value, experimental data show that when the change in the duct characteristics causes the output air volume to decrease, the output air volume is adjusted to the preset value after the monitoring program detects and processes the real-time operating status and parameters of the system and adjusts the fan motor speed, that is, the output air volume remains basically constant.

[0062] The dynamic constant air volume control based on the load torque observer mainly includes: making the working characteristic curve of the fan and the air duct under various air volume Q conditions, and then finding the corresponding curve according to the Q value, obtaining the real-time air volume through the speed n feedback, and performing PI control to obtain the target speed by making the difference with the target air volume, and achieving the control purpose of constant air volume by adjusting the motor speed.

[0063] This method realizes the real-time observation of fan load torque and air duct parameters by constructing a reduced-order Romberg load torque observer, and further calculates the wind pressure and air volume. The real-time calculated air volume is controlled by closed-loop PI, forming a three-loop control of air volume-speed-current, and finally realizing high-precision dynamic constant air volume control.

[0064] At present, some air conditioner fan drives use position sensorless permanent magnet synchronous motors to achieve constant air volume control of air conditioner indoor units. Experiments have found that when the air outlet of the duct air conditioner is restricted, that is, the air intake is greater than the air outlet, the fan phase current detected by the permanent magnet synchronous motor controlled by the position sensorless in its drive circuit is different from that of the indoor unit fan at the same speed under normal circumstances, which may cause the actual air volume at the air outlet to be different from the set air volume.

[0065] In order to solve the above problems, the present invention provides an air conditioner constant air volume control method, an electronic device, an air conditioner and a storage medium.

[0066] See attached Figure 1 , Figure 1 FIG. 1 is a flow chart showing the main steps of a method for controlling a constant air volume of an air conditioner according to an embodiment of the present invention. Figure 1 As shown, the air conditioner constant air volume control method in the embodiment of the present invention mainly includes the following steps S101 to S104.

[0067] Step S101: Obtain the power and / or current of the wind turbine.

[0068] Step S102: obtaining the actual air volume at the air outlet based on the power and / or current of the fan.

[0069] Step S103: Determine whether the actual air volume is the same as the set air volume.

[0070] Step S104: selectively adjusting the fan speed based on the determination result.

[0071] Based on the method described in steps S101 to S103 above, the air volume can be checked according to the power and / or current of the fan operation, and the wind speed can be adjusted in time when the actual air volume is different from the set air volume, thereby realizing constant air volume control of the air conditioner and improving user experience.

[0072] The above steps S101 to S104 are further explained below.

[0073] In the air conditioner constant air volume control method provided by the present invention, refer to the attached Figure 2 , Figure 2 It is a control principle diagram of a permanent magnet synchronous motor driven by a position sensorless fan according to an embodiment of the present invention.

[0074] like Figure 2 As shown, the figure includes a permanent magnet synchronous motor PMSM, a PI controller (a first PI controller, a second PI controller and a third PI controller), an IPARK transformation module, a Clark transformation module, a PARK transformation module, a space vector modulation module, an inverter and a SMO observation module.

[0075] Among them, the PI controller is a linear controller, which forms a control deviation based on the given value and the actual output value, and forms a control quantity through a linear combination of the proportion and integral of the deviation to control the controlled object.

[0076] IPARK transformation module, Clark transformation module and PARK transformation module are all coordinate transformation modules used to analyze motor operation.

[0077] Among them, the IPARK transformation represents the transformation from two phases stationary relative to the rotor to two phases stationary relative to the stator; the Clark transformation represents the transformation from stationary three coordinates to stationary two coordinates, and the Park transformation represents the transformation from stationary coordinate axes to rotating coordinate axes.

[0078] The space vector modulation module SVPWM is used for field oriented control of induction permanent magnet synchronous motor.

[0079] Inverters are used to convert direct current (DC) into alternating current (AC).

[0080] The SMO observation module is used to estimate the induced electromotive force, speed and rotor position of the motor.

[0081] The parameter identification module is used to calculate the motor parameters.

[0082] Furthermore, ia, ib, ic are the stator currents of phases a, b, c; iα, iβ are the currents of axes α and β; id, iq are the actual current values ​​of axes d and q; wr* is the given speed value of the motor; wr is the actual speed value of the motor; iq*, id* are the given current values ​​of axes q and d; Uq, Ud are the voltages of axes q and d; Uα, Uβ are the voltages of axes α and β; 1 / s is the integration circuit; θr is the rotor position.

[0083] In the air conditioner constant air volume control method provided by the present invention, the air conditioner electric controller comprises at least a fan control module and a fan drive module. Figure 3 , Figure 3Schematic diagram of air conditioning control principle according to an embodiment of the present invention.

[0084] like Figure 3 As shown, the controller 301 of the air conditioner includes a fan control module 3011 and a fan drive module 3012. The fan control module 3011 controls the fan drive module 3012 to perform space vector pulse width modulation to control the operation of the fan 302. The controller 301 obtains the parameters fed back by the fan 302, thereby forming a control loop.

[0085] Furthermore, in some implementations of step S101, the power and / or current of the fan may be acquired based on a controller of the air conditioner.

[0086] In some implementations of step S102, the actual air volume corresponding to the power and / or current of the fan may be obtained based on an air volume control model or an air volume correspondence table.

[0087] Among them, the air volume control model is used to predict the relationship between the power and / or current of the fan, the air volume at the air outlet and the fan speed; the air volume correspondence table includes multiple groups of fan power and / or current, air volume at the air outlet and fan speed.

[0088] For further information, see Appendix Figure 4 , Figure 4 FIG. 1 is a flow chart showing the main steps of a method for controlling a constant air volume of an air conditioner according to another embodiment of the present invention. Figure 4 As shown, it mainly includes the following steps S401 to S402.

[0089] Step S401: Obtain the relationship between the power and / or current of multiple groups of fans, the air volume at the air outlet, and the fan speed.

[0090] In some embodiments, the air conditioner may include multiple air volume gears. The air volume gear of the air conditioner is realized by controlling the fan speed inside the air conditioner. The fan speed inside the air conditioner is controlled by a motor, and the motor speed can be realized by changing the current size. Therefore, by controlling the current size, the fan speed inside the air conditioner can be controlled, thereby realizing different air volume gears.

[0091] Among them, each air volume level can correspond to multiple air outlet static pressure values. In the ventilation system, the air outlet static pressure value refers to the pressure corresponding to the air when it flows out of the ventilation duct or equipment and enters the room, that is, a pressure value calculated from the air volume and outlet area output by the fan, usually expressed in Pascal (Pa) as the unit. Among them, the air duct unit of the air conditioner indoor unit determines the air duct volume and air inlet and outlet area according to the model. The air duct volume and air inlet and outlet area can be determined by determining the model. The air outlet static pressure can reflect the relationship between the air flow speed and pressure, and is an important indicator to measure the working effect of the ventilation system.

[0092] For further information, see Appendix Figure 5 , Figure 5 1 is a flow chart of the main steps of obtaining the relationship between the power and / or current, the air volume at the air outlet and the fan speed of multiple groups of fans according to an embodiment of the present invention. Figure 5 As shown, step S401 mainly includes the following steps S4011 to S4013.

[0093] Step S4011: Based on a first preset static pressure value, obtain a first fan speed, a first power and / or a first current corresponding to a plurality of preset air outlet air volumes.

[0094] In some embodiments, five air volume of air outlets may be preset, namely L1, L2, L3, L4, and L5, with the air volume increasing in sequence. Further, the fan speed, power, and / or current corresponding to the air volume of each air outlet under a normal static pressure of 0 Pa (i.e., the first static pressure value) may be measured.

[0095] Step S4012: Based on a plurality of preset air outlet air volumes and corresponding first fan speeds, obtain a plurality of other powers and / or currents corresponding to a plurality of other preset static pressure values.

[0096] In the long-term operation of the indoor duct unit, the air intake of the air conditioner will decrease due to the dirty and blocked air duct, which will cause the air outlet of the air conditioner fan to change at the same wind speed, or because the space requires a longer duct for air supply, the loss along the way of air supply will increase, resulting in a decrease in the air volume. Therefore, multiple static pressure values ​​can be set to simulate the situation of a long air supply duct or dirty and blocked filters, and obtain the relationship between the fan power and / or current, outlet air volume and fan speed under different static pressure values.

[0097] Specifically, when the air volume at the air outlet and the fan speed are fixed, the first preset static pressure value can be adjusted, for example, adjusted to 10Pa, 20Pa, 30Pa or other multiple preset static pressure values, and the power and / or current of the fan can be measured.

[0098] Step S4013: Based on other multiple preset static pressure values, adjust the fan speed and obtain the outlet air volume. When the outlet air volume reaches multiple preset outlet air volumes, obtain other multiple fan speeds corresponding to the multiple preset outlet air volumes.

[0099] In some embodiments, the fan speed corresponding to the air volume at the air outlet can be obtained under a fixed static pressure value. Specifically, the fan speed can be adjusted, and the air volume at the air outlet can be tested using a device such as an air volume meter. When the air volume reaches multiple preset air volume at the air outlet, the current fan speed corresponding to the multiple preset air volume at the air outlet is recorded.

[0100] It should be pointed out that the above examples of multiple preset outlet air volumes, the first preset static pressure value and other preset static pressure values ​​are only for suitability description. In actual applications, technical personnel in this field can make settings according to specific scenarios, and no limitation is made here.

[0101] Through the method described in steps S4011 to S4013, the relationship between the power and / or current, the air volume at the air outlet and the fan speed of multiple groups of fans can be obtained. Further, in some embodiments, an automated test tool can be established according to the method described above.

[0102] See attached Figure 6 , Figure 6 FIG. 1 is a schematic diagram of an automated testing tool according to an embodiment of the present invention. Figure 6 As shown, it mainly includes a testing device 601, a static pressure control device 602, a controller 603, a fan 604, and an air volume meter 605.

[0103] Among them, the test equipment 601 can obtain the fan speed, outlet air volume and motor power and / or current; the static pressure control equipment 602 can control the outlet static pressure value; the controller 603 can obtain the fan 604 speed; the air volume meter 605 can obtain the outlet air volume.

[0104] based on Figure 6 The automated testing fixture shown can automatically test the relationship between the output power and / or current of multiple groups of fans, the air volume at the air outlet, and the fan speed.

[0105] The above is a further description of step S401.

[0106] Step S402: establishing an air volume control model based on multiple sets of relationships, or generating an air volume correspondence table.

[0107] Specifically, after obtaining the relationship between the power and / or current of multiple sets of fans, the air volume at the air outlet and the fan speed, an air volume control model can be established based on the multiple sets of relationships, or an air volume correspondence table can be generated.

[0108] In some implementations of the above step S402, see the attached Figure 7 , Figure 7 FIG. 1 is a flow chart showing the main steps of a method for controlling a constant air volume of an air conditioner according to another embodiment of the present invention. Figure 7 As shown, it mainly includes step S701 to step S702.

[0109] Step S701: taking multiple groups of the power and / or current, air outlet air volume and fan speed of the fan as training data sets.

[0110] Step S702: training the air volume control model based on the training data set.

[0111] Specifically, multiple groups of fan power and / or current, outlet air volume and fan speed data can be summarized, and the summarized data can be imported into Matlab as a data training set. Curve fitting tools in Matlab, such as polynomial fitting, are used to fit fan and pipeline characteristic curves according to multiple groups of data, establish an air volume control model, and train the model.

[0112] Among them, Matlab is a commercial mathematical software used in data analysis, wireless communications, deep learning, image processing and computer vision, signal processing, quantitative finance and risk management, robotics, control systems and other fields.

[0113] Matlab is a combination of the two words matrix & laboratory, which means matrix factory (matrix laboratory). The software is mainly a high-tech computing environment for scientific computing, visualization and interactive programming. It integrates many powerful functions such as numerical analysis, matrix calculation, scientific data visualization, and modeling and simulation of nonlinear dynamic systems in an easy-to-use window environment, providing a comprehensive solution for scientific research, engineering design and many scientific fields that must perform effective numerical calculations, and to a large extent getting rid of the editing mode of traditional non-interactive programming languages ​​(such as C, Fortran).

[0114] Furthermore, the mathematical formula used in the air volume control model is: AirFlow = F (Speed, Power) where AirFlow is the actual air volume of the air outlet; Speed ​​is the fan speed, which in actual applications is the fan speed corresponding to the set air volume; Power is the power of the fan. If the data obtained is the current of the fan, the power is calculated based on the current first, and then the actual air volume of the air outlet is obtained based on the power.

[0115] In some other embodiments of the above-mentioned step S402, an air volume correspondence table can be generated according to the power and / or current of multiple groups of fans, the air volume of the air outlet and the fan speed. Furthermore, after obtaining the power and / or current of the fan, the actual air volume of the air outlet is obtained by looking up the table.

[0116] The air volume correspondence table may be shown in Table 1 below.

[0117] Table 1 Power / Current Air volume at air outlet Fan speed <![CDATA[P1 / I1]]> <![CDATA[Q1]]> <![CDATA[N1]]> <![CDATA[P2 / I2]]> <![CDATA[Q2]]> <![CDATA[N2]]> <![CDATA[P3 / I3]]> <![CDATA[Q3]]> <![CDATA[N3]]> <![CDATA[P4 / I4]]> <![CDATA[Q4]]> <![CDATA[N4]]> ... ... ... <![CDATA[P n / I n ]]> <![CDATA[Q n ]]> <![CDATA[N n ]]>

[0118] Furthermore, in some embodiments, the air volume control model or the air volume correspondence table can be transplanted into the fan control module of the air conditioning controller. After the controller obtains the power and / or current of the fan, the actual air volume of the outlet is obtained according to the air volume control model or the air volume correspondence table in the fan control module.

[0119] The above is a further description of step S102.

[0120] In some implementations of the above step S103, after the actual air volume of the air outlet is obtained, it can be determined whether the actual air volume is the same as the set air volume.

[0121] Furthermore, in some implementations of the above step S104, if the actual air volume is different from the set air volume, the air volume difference between the actual air volume and the set air volume is obtained, and the fan speed is adjusted based on the air volume difference.

[0122] When the air volume changes due to dirty or clogged air ducts, or when the air volume decreases due to air supply through longer ducts, the drag coefficient will change, causing the power and / or current of the fan to change, which in turn causes the actual air volume at the air outlet to be different from the set air volume. At this time, the air volume difference between the actual air volume and the set air volume can be obtained, and the fan speed can be adjusted based on the air volume difference to achieve stepless constant air volume control.

[0123] For details, see the attached Figure 8 , Figure 8 1 is a schematic diagram of a constant air volume control principle of an air conditioner according to an embodiment of the present invention.

[0124] like Figure 8 As shown, it includes a calculation unit, a PI controller, an observer, an acquisition unit and a wind turbine. Specifically, the power and / or current of the wind turbine can be acquired based on the observer.

[0125] Furthermore, in some embodiments, the acquisition unit includes an air volume control model. If the acquired data is the current of the fan, the power is first calculated based on the current. Furthermore, the observer can input the acquired data and the fan speed corresponding to the set air volume of the air conditioner into the acquisition unit. The air volume control model predicts the actual air volume at this time and sends the actual air volume to the calculation unit.

[0126] In other embodiments, the acquisition unit includes an air volume correspondence table, and the observer can input the power and / or current of the fan, and the fan speed corresponding to the set air volume of the air conditioner into the acquisition unit, obtain the actual air volume at this time according to the air volume correspondence table, and send the actual air volume to the calculation unit.

[0127] Furthermore, the calculation unit compares the user's set air volume with the actual air volume to determine whether the actual air volume is the same as the set air volume. If the actual air volume is different from the set air volume, the air volume difference between the set air volume and the set air volume is obtained, and the air volume difference is sent to the PI controller. The PI controller adjusts the fan speed according to the air volume difference.

[0128] For example, if the set air volume is 1000 and the actual air volume is 800, and the air volume difference is 200, the PI controller will increase the fan speed to make the actual air volume reach 1000.

[0129] In some other implementations of the above step S104, if the actual air volume is the same as the set air volume, the fan speed is not adjusted.

[0130] The above is a further explanation of step S104.

[0131] Through the above implementation, the air volume can be checked according to the power and / or current of the fan operation, and the wind speed can be adjusted in time when the actual air volume is different from the set air volume, thereby realizing constant air volume control of the air conditioner and improving the user experience.

[0132] It should be pointed out that although the various steps in the above embodiments are described in a specific order, those skilled in the art can understand that in order to achieve the effects of the present invention, different steps do not have to be performed in such an order. They can be performed simultaneously (in parallel) or in other orders. These changes are within the scope of protection of the present invention.

[0133] Furthermore, the present invention also provides an air conditioner constant air volume control device.

[0134] See attached Fig. 9 , Fig. 9 FIG. 1 is a main structural block diagram of an air conditioner constant air volume control device according to an embodiment of the present invention. Fig. 9 As shown, the air conditioner constant air volume control device in the embodiment of the present invention mainly includes a first acquisition module 901, a second acquisition module 902, a judgment module 903 and an adjustment module 904.

[0135] In some embodiments, the first acquisition module 901 can be configured to acquire the power and / or current of the fan. The second acquisition module 902 can be configured to acquire the actual air volume of the air outlet based on the power and / or current of the fan. The judgment module 903 can be configured to judge whether the actual air volume is the same as the set air volume. The adjustment module 904 can be configured to selectively adjust the fan speed based on the judgment result. In one embodiment, the description of the specific implementation function can be referred to steps S101 to S104.

[0136] Further, it should be understood that since the setting of each module is only for illustrating the functional units of the device of the present invention, the physical devices corresponding to these modules may be the processor itself, or a part of the software in the processor, a part of the hardware, or a part of the combination of software and hardware. Therefore, the number of each module in the figure is only schematic.

[0137] Those skilled in the art will appreciate that the modules in the device can be adaptively split or merged. Such splitting or merging of specific modules will not cause the technical solution to deviate from the principle of the present invention, and therefore, the technical solutions after splitting or merging will fall within the protection scope of the present invention.

[0138] The above-mentioned air conditioner constant air volume control device is used to execute Figure 1 The embodiment of the air-conditioning constant air volume control method shown in the figure has similar technical principles, technical problems solved and technical effects produced. Technicians in this technical field can clearly understand that for the convenience and conciseness of description, the specific working process and related instructions of the air-conditioning constant air volume control device can refer to the contents described in the embodiment of the air-conditioning constant air volume control method, which will not be repeated here.

[0139] It is understood by those skilled in the art that the present invention implements all or part of the processes in the method of the above embodiment, and can also be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned various method embodiments when executed by the processor. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable storage medium may include: any entity or device, medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory, random access memory, electric carrier signal, telecommunication signal and software distribution medium, etc. that can carry the computer program code.

[0140] Furthermore, the present invention also provides an electronic device. Fig.10 , Fig.10 FIG. 1 is a schematic diagram of the main structure of an electronic device according to an embodiment of the present invention. Fig.10As shown, the electronic device in the embodiment of the present invention mainly includes a processor 1001 and a storage device 1002, the storage device 1002 can be configured to store a program for executing the air conditioner constant air volume control method of the above method embodiment, and the processor 1001 can be configured to execute the program in the storage device 1002, which includes but is not limited to the program for executing the air conditioner constant air volume control method of the above method embodiment. For ease of explanation, only the part related to the embodiment of the present invention is shown, and for specific technical details not disclosed, please refer to the method part of the embodiment of the present invention.

[0141] In some possible implementations of the present invention, the electronic device may include multiple processors 1001 and multiple storage devices 1002. The program for executing the air conditioning constant air volume control method of the above method embodiment may be divided into multiple subprograms, and each subprogram may be loaded and run by the processor 1001 to execute different steps of the air conditioning constant air volume control method of the above method embodiment. Specifically, each subprogram may be stored in different storage devices 1002, and each processor 1001 may be configured to execute the program in one or more storage devices 1002 to jointly implement the air conditioning constant air volume control method of the above method embodiment, that is, each processor 1001 executes different steps of the air conditioning constant air volume control method of the above method embodiment, to jointly implement the air conditioning constant air volume control method of the above method embodiment.

[0142] The above-mentioned multiple processors 1001 may be processors deployed on the same device. For example, the above-mentioned electronic device may be a high-performance device composed of multiple processors, and the above-mentioned multiple processors 1001 may be processors configured on the high-performance device. In addition, the above-mentioned multiple processors 1001 may also be processors deployed on different devices. For example, the above-mentioned electronic device may be a server cluster, and the above-mentioned multiple processors 1001 may be processors on different servers in the server cluster.

[0143] Furthermore, the present invention also provides an air conditioner. In an embodiment of an air conditioner according to the present invention, the air conditioner may include an air conditioner body and the electronic device described in the above electronic device embodiment.

[0144] Furthermore, the present invention also provides a computer-readable storage medium. In a computer-readable storage medium embodiment according to the present invention, the computer-readable storage medium can be configured to store a program for executing the air conditioning constant air volume control method of the above-mentioned method embodiment, and the program can be loaded and run by the processor to implement the above-mentioned air conditioning constant air volume control method. For ease of explanation, only the parts related to the embodiment of the present invention are shown. For specific technical details not disclosed, please refer to the method part of the embodiment of the present invention. The computer-readable storage medium can be a storage device formed by various electronic devices. Optionally, the computer-readable storage medium in the embodiment of the present invention is a non-temporary computer-readable storage medium.

[0145] It should be noted that the user information (including but not limited to user device information, user personal information, object information corresponding to air conditioner usage data, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, usage data, etc.) involved in the embodiments of the present disclosure are all information and data authorized by the user or fully authorized by all parties.

[0146] The data acquisition, collection and other actions involved in the embodiments of the present disclosure are all performed after authorization by the user or the object or after full authorization by all parties.

[0147] So far, the technical solution of the present invention has been described in conjunction with an embodiment shown in the accompanying drawings, but it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A method for controlling constant air volume of an air conditioner, characterized in that: The method comprises: Obtain the power and / or current of the fan; Obtaining the actual air volume at the air outlet based on the power and / or current of the fan; Determining whether the actual air volume is the same as the set air volume; The fan speed is selectively adjusted based on the judgment result.

2. The air conditioning constant air volume control method according to claim 1, characterized in that: The obtaining of the actual air volume at the air outlet based on the power and / or current of the fan comprises: Obtaining the actual air volume corresponding to the power and / or current of the fan based on an air volume control model or an air volume correspondence table; Among them, the air volume control model is used to predict the relationship between the power and / or current of the fan, the outlet air volume and the fan speed; the air volume correspondence table includes multiple groups of the power and / or current of the fan, the outlet air volume and the fan speed.

3. The air conditioning constant air volume control method according to claim 2, characterized in that: The method further comprises: Obtaining the relationship between the power and / or current of the fans, the air volume at the air outlets and the speed of the fans; The air volume control model is established based on multiple groups of the relationships, or the air volume correspondence table is generated.

4. The air conditioning constant air volume control method according to claim 3, characterized in that: The acquiring of the relationship between the power and / or current of the plurality of fans, the air volume at the air outlet and the speed of the fan comprises: Based on the first preset static pressure value, obtaining a first fan speed, a first power and / or a first current corresponding to a plurality of preset air outlet air volumes; Based on the multiple preset air outlet air volumes and the corresponding first fan speeds, obtaining multiple other powers and / or currents corresponding to multiple other preset static pressure values; Based on the other multiple preset static pressure values, the fan speed is adjusted and the outlet air volume is obtained. When the outlet air volume reaches the multiple preset outlet air volumes, the other multiple fan speeds corresponding to the multiple preset outlet air volumes are obtained.

5. The air conditioning constant air volume control method according to claim 1, characterized in that: The selective adjustment of the fan speed based on the judgment result includes: If the actual air volume is different from the set air volume, obtaining the air volume difference between the actual air volume and the set air volume, and adjusting the fan speed based on the air volume difference; If the actual air volume is the same as the set air volume, the fan speed is not adjusted.

6. The air conditioning constant air volume control method according to claim 4, characterized in that: The method further comprises: Using the multiple groups of the power and / or current of the fan, the air volume at the air outlet and the fan speed as training data sets; The air volume control model is trained based on the training data set.

7. An air conditioner constant air volume control device, characterized in that: The device comprises: A first acquisition module, configured to acquire power and / or current of the wind turbine; A second acquisition module, configured to acquire an actual air volume at an air outlet based on the power and / or current of the fan; A determination module, configured to determine whether the actual air volume is the same as the set air volume; The adjustment module is configured to selectively adjust the fan speed based on the determination result.

8. An electronic device comprising a processor and a storage device, wherein the storage device is suitable for storing a plurality of program codes, characterized in that: The program code is suitable for being loaded and run by the processor to execute the air conditioning constant air volume control method according to any one of claims 1 to 6.

9. An air conditioner, characterized in that: The air conditioner comprises an air conditioner body and the electronic device according to claim 8.

10. A computer-readable storage medium storing a plurality of program codes, characterized in that: The program code is suitable for being loaded and run by a processor to execute the air conditioning constant air volume control method according to any one of claims 1 to 6.

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