Constant air volume control method and device for multi-motor system

Abstract

The invention relates to the technical field of motor control, and discloses a multi-motor system constant air volume control method and device, and the method comprises the steps: building a constant air volume model based on the total power value and torque value of a multi-motor system under different static pressures and different target air volumes; according to the current target air volume, target bus power is calculated through a constant air volume model; the total power value of the multi-motor system under the current target air volume is compared with the target bus power; and the torque of each motor is adjusted according to the constant air volume model and the comparison result. According to the method, by establishing a constant air volume model, based on power and torque data of a multi-motor system under different working conditions, accurate calculation of the target bus power is achieved, and the motor torque can be adjusted according to the difference between the actual total power and the target value. By means of the whole process, the automation degree and the precision degree of constant air volume control of the multi-motor system are remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of motor control, and in particular to a method and device for controlling constant air volume in a multi-motor system. Background Art

[0002] In complex systems with multiple motors operating in concert, existing control solutions have significant limitations. DC motors often employ constant speed or constant torque control strategies, while AC motors typically operate in open-loop control. These solutions result in a sharp decrease in fan airflow during system operation once static pressure increases, severely impacting the user's cooling and heating experience. Current market-proven constant airflow motor control technologies, such as those from brands like RBC and Nidec, are generally only suitable for single-duct systems, meaning each motor corresponds to a single, independent system.

[0003] Traditional constant air volume control algorithms usually collect parameters such as the air volume and motor electrical performance of the target load under different static pressure conditions to build a constant air volume mathematical model, which is then imported into the motor driver for control. This solution performs well in single-fan systems such as air conditioners and heating furnaces, but it is difficult to work in multi-fan systems (such as fresh air exchangers). Taking the fresh air exchanger as an example, it contains multiple fans such as the air intake motor and the exhaust motor. Although the fans are separated by filters, they still interact significantly when running at the same time, resulting in complex changes in key parameters such as static pressure, air volume, speed, torque, current and power. Therefore, for such complex systems with multiple fans operating in coordination, it is urgent to develop a new constant air volume control solution to meet actual application needs. Summary of the Invention

[0004] In view of this, the present invention provides a method and device for controlling constant air volume in a multi-motor system to solve the problem of how to achieve constant air volume control in a multi-electrode system.

[0005] In the first aspect, the present invention provides a constant air volume control method for a multi-motor system, comprising: establishing a constant air volume model based on the total power value and torque value of the multi-motor system under different static pressures and different target air volumes; calculating the target bus power through the constant air volume model according to the current target air volume; comparing the total power value of the multi-motor system under the current target air volume with the target bus power; and adjusting the torque of each motor according to the constant air volume model and the comparison result.

[0006] This method establishes a constant air volume model based on the power and torque data of the multi-motor system under different operating conditions, accurately calculating the target bus power and adjusting the motor torque according to the difference between the actual total power and the target value. This complete process significantly improves the automation and precision of constant air volume control in multi-motor systems, enabling the system to automatically adapt to different static pressure and target air volume requirements under complex operating conditions, ensuring constant air volume output, reducing manual intervention, labor costs, and the risk of operational errors, while also improving system operational efficiency and stability.

[0007] In an optional embodiment, the process of establishing a constant air volume model includes: controlling each motor to operate at a target air volume under a target static pressure; collecting the bus power and torque of each motor; adjusting the target air volume, and returning to the step of "controlling each motor to operate at a target air volume under a target static pressure" until the bus power and torque of each motor under the current target static pressure and different target air volumes are collected; adjusting the target static pressure, and returning to the step of "controlling each motor to operate at a target air volume under a target static pressure" until the bus power and torque of each motor under different target static pressures and different target air volumes are collected; taking the bus power and value of each motor as the total power value of the multi-motor system; performing curve fitting based on the total power value of the multi-motor system and the torque value of each motor under different target static pressures and different target air volumes to generate a constant air volume model.

[0008] This process systematically collects the bus power and torque of each motor at different target static pressures and target air volumes, sums the motor power as the total system power, and finally generates a model through curve fitting. This operation enables the constant air volume model to comprehensively and accurately reflect the operating characteristics of the multi-motor system under various operating conditions, providing a reliable basis for subsequent target bus power calculations and motor torque adjustments.

[0009] In an optional embodiment, the process of adjusting the torque of each motor includes: if the total power value of the multi-motor system is greater than the target bus power at the current target air volume, then reducing the torque of each motor at the same time with a first adjustment step; if the total power value of the multi-motor system is less than the target bus power at the current target air volume, then increasing the torque of each motor at the same time with a second adjustment step; and repeating the above steps until the total power value of the multi-motor system is equal to the target bus power at the current target air volume.

[0010] By setting different adjustment steps, the motor torque is dynamically adjusted according to the relationship between the total system power and the target bus power until the two are equal. This closed-loop adjustment mechanism optimizes the motor's operating status in real time, ensuring that the multi-motor system maintains power balance at the target air volume. This avoids energy waste and equipment overheating caused by excess power. It also prevents problems such as unstable air volume and abnormal equipment operation caused by insufficient power, thereby extending equipment life, improving energy efficiency, and ensuring the reliability and cost-effectiveness of system operation.

[0011] In an optional implementation, the absolute values of the adjustment amounts of the first adjustment step and the second adjustment step are equal.

[0012] In an optional embodiment, before comparing the total power value of the multi-motor system under the current static pressure with the target bus power, the method further includes: setting the current target air volume and controlling each motor to start at the lowest torque.

[0013] Starting the motor at minimum torque before power comparison and torque adjustment can effectively reduce the current surge and mechanical stress at the moment of motor startup. This not only reduces damage to the motor itself and related electrical equipment, extending equipment life, but also reduces energy consumption during startup and improves energy efficiency. Furthermore, starting at minimum torque provides a stable starting state for subsequent precise torque adjustment based on the target air volume. This prevents excessive or insufficient torque at startup from affecting normal system regulation and stable operation, laying a solid foundation for constant air volume control across the entire multi-motor system.

[0014] In a second aspect, the present invention provides a constant air volume control device for a multi-motor system, comprising: a model establishment module for establishing a constant air volume model based on the total power value and torque value of the multi-motor system under different static pressures and different target air volumes; a calculation module for calculating the target bus power according to the current target air volume through the constant air volume model; a comparison module for comparing the total power value of the multi-motor system under the current static pressure with the target bus power; and an adjustment module for adjusting the torque of each motor according to the constant air volume model and the comparison result.

[0015] The constant air volume model constructed by the model building module provides core data support for system operation; the calculation module accurately calculates the target bus power based on the model and sets precise targets for system operation; the comparison module monitors the difference between the total system power and the target power in real time to provide a basis for adjustment; the adjustment module adjusts the motor torque in a timely manner according to the comparison results to achieve closed-loop control of the system. Each module has a clear division of labor and works in coordination, breaking down the entire constant air volume control process into multiple functional units, making the system structure clear and the logic rigorous, which facilitates the design, development, maintenance and upgrade of the system. At the same time, the modular design improves the reliability and scalability of the system. When system requirements change or failures occur, the problem module can be quickly located and targeted processing can be carried out, reducing system maintenance costs and downtime, and improving the overall performance of the system.

[0016] In a third aspect, the present invention provides a computer device comprising: a memory and a processor, the memory and the processor being communicatively connected to each other, the memory storing computer instructions, and the processor executing the multi-motor system constant air volume control method of the first aspect or any corresponding embodiment thereof by executing the computer instructions.

[0017] In a fourth aspect, the present invention provides a computer-readable storage medium having computer instructions stored thereon, the computer instructions being used to enable a computer to execute the multi-motor system constant air volume control method of the first aspect or any corresponding embodiment thereof.

[0018] In a fifth aspect, the present invention provides a computer program product comprising computer instructions for causing a computer to execute the multi-motor system constant air volume control method according to the first aspect or any corresponding embodiment thereof. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 is a flow chart of a method for controlling constant air volume in a multi-motor system according to an embodiment of the present invention;

[0021] Figure 2 is a flow chart of another method for controlling constant air volume in a multi-motor system according to an embodiment of the present invention;

[0022] Figure 3 is a flow chart of another method for controlling constant air volume in a multi-motor system according to an embodiment of the present invention;

[0023] Figure 4 is a structural block diagram of a constant air volume control device for a multi-motor system according to an embodiment of the present invention;

[0024] Figure 5 Schematic diagram of the hardware structure of a computer device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0025] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0026] According to an embodiment of the present invention, an embodiment of a constant air volume control method for a multi-motor system is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0027] In this embodiment, a method for controlling constant air volume of a multi-motor system is provided, which can be used in the above-mentioned mobile terminals, such as mobile phones, tablet computers, etc. Figure 1 FIG. 1 is a flow chart of a method for controlling a constant air volume in a multi-motor system according to an embodiment of the present invention. Figure 1 As shown, the process includes the following steps:

[0028] Step S1: Establish a constant air volume model based on the total power value and torque value of the multi-motor system under different static pressures and different target air volumes.

[0029] Specifically, to ensure stable static pressure balance across the entire load system and avoid unfavorable conditions where fans pull or draw air from each other, the wind pressure of the two fans must be consistent. This means the operating torques of the two motors driving the fans must be identical. Furthermore, to achieve optimal operating results, the deviation in the actual torques of the two motors must be strictly controlled to the minimum possible. Therefore, a constant air volume model is established using the total power and torque values of the multi-motor system at different static pressures and target air volumes.

[0030] For example, the static pressure can be 0Pa, 50Pa, 100Pa, 150Pa, 2000Pa, 2500Pa, and the target air volume can be 400CFM, 800CFM, 1200CFM. Therefore, when the static pressure is 0Pa and the target air volume is 400CFM, 800CFM, and 1200CFM respectively, the total power value of the multi-motor system and the torque value of each motor can be collected and matched one by one to establish a constant air volume model.

[0031] Step S2: Calculate the target bus power according to the current target air volume through the constant air volume model.

[0032] Specifically, the constant air volume model is a relationship model in which the total power value of the system corresponds to the torque value of each motor under different static pressures and different target air volumes. Therefore, in the constant air volume module, the total power value corresponding to the current target air volume under the current static pressure can be found and used as the target bus power.

[0033] Step S3: Compare the total power value of the multi-motor system at the current target air volume with the target bus power.

[0034] Step S4: adjusting the torque of each motor according to the constant air volume model and the comparison result.

[0035] In the field of ventilation system control, constant air volume control systems use torque as the core target for automatic adjustment. Compared to traditional speed regulation methods, their air volume control stability is significantly superior. This is because the system's static pressure is directly positively correlated with the speed. Any fluctuation in speed will directly cause a dramatic change in static pressure, which in turn leads to significant fluctuations in air volume. When torque is used as the regulation target, the system can effectively mitigate the impact of external interference on air volume through precise control of the motor's output torque, ensuring stable air volume output even under complex operating conditions.

[0036] Specifically, if the total power value of the multi-motor system under the current target air volume is less than the target bus power, it means that the current output of each motor is small and the torque of each motor needs to be increased; if the total power value of the multi-motor system under the current target air volume is greater than the target bus power, it means that the current output of each motor is large and the torque of each motor needs to be reduced; if the total power value of the multi-motor system under the current target air volume is equal to the target bus power, the current operating torque of each motor is maintained.

[0037] In some optional embodiments, such as Figure 2 As shown in Figure 2, the process of establishing a constant air volume model includes:

[0038] Step S11: Under the target static pressure, control each motor to operate under the target air volume.

[0039] Step S12: Collect the bus power and torque of each motor.

[0040] Step S13: Adjust the target air volume and return to the step of "controlling each motor to operate at the target air volume under the target static pressure" until the bus power and torque of each motor under the current target static pressure and different target air volumes are collected.

[0041] Step S14: Adjust the target static pressure and return to the step of "controlling each motor to operate at the target air volume under the target static pressure" until the bus power and torque of each motor under different target static pressures and different target air volumes are collected.

[0042] Step S15: The sum of the bus power of each motor is used as the total power value of the multi-motor system.

[0043] Step S16: Based on the total power value of the multi-motor system and the torque value of each motor under different target static pressures and different target air volumes, curve fitting is performed to generate a constant air volume model.

[0044] Specifically, all motors in the multi-motor system are tested as a whole to collect air volume information. The actual air volume collected is the sum of the air volumes of all motors; the bus power collected is the sum of the power Ps of all motors.

[0045] To ensure static pressure balance across the entire load and prevent mutual suction and exhaust, there must be no pressure difference between the two fans. This means the operating torques of the two motors must be identical, and the actual torque deviation between the two motors must be as small as possible. For example, the following table shows data collection examples: At three target air volumes (400 / 800 / 1200 CFM, high, medium, and low), the total power and torque values at six different static pressures were collected.

[0046] Table 1

[0047]

[0048]

[0049] Based on the collected data (bus power Ps, torque t), a curve is fitted to generate a constant air volume model, where the constant air volume model formula is Ps = f(t). If only one set of air volume is required, a single set of air volume can be fitted, represented by a quadratic polynomial (Ps = A + B*t + C*t*t), where t represents the actual torque. If multiple sets of air volume are required, the required air volume can be fitted and the corresponding curve can be selected for fitting.

[0050] In some optional implementations, the process of adjusting the torque of each motor includes:

[0051] If the total power value of the multi-motor system at the current target air volume is greater than the target bus power, the torque of each motor is simultaneously reduced by the first adjustment step; if the total power value of the multi-motor system at the current target air volume is less than the target bus power, the torque of each motor is simultaneously increased by the second adjustment step; the above steps are repeated until the total power value of the multi-motor system at the current target air volume is equal to the target bus power.

[0052] Specifically, if the total power value of the multi-motor system at the current target air volume is equal to the target bus power, the operating torque of each current motor is maintained.

[0053] Specifically, this adjustment method can automatically adjust according to the actual power difference. No matter what operating conditions the system is in, as long as there is a mismatch between the total power and the target bus power, corresponding adjustments will be made, enabling the system to adapt to different working conditions and environmental changes, enhancing the adaptability of the multi-motor system to various complex working conditions, and improving the overall performance and flexibility of the system.

[0054] In some optional embodiments, the absolute values of the adjustment amounts of the first adjustment step and the second adjustment step are equal.

[0055] In some optional embodiments, before comparing the total power value of the multi-motor system at the current static pressure with the target bus power, it further includes: setting the current target air volume and controlling each motor to start with the lowest torque.

[0056] Based on the above embodiments, a specific flowchart of the constant air volume control method for the multi-motor system is now given, as Figure 3 shown below:

[0057] (1) Set the target air volume: Set a target air volume greater than the minimum value, and the multi-motor starts with the lowest torque.

[0058] (2) Calculate the target bus power: Based on the target air volume, calculate the corresponding target bus power Ps through the air volume model formula.

[0059] (3) Collect the actual power: Collect the actual power P1 + P2 +... + Pn of the multi-motor.

[0060] (4) Power comparison and judgment

[0061] If Ps > P1 + P2 +... + Pn, the set torque of each motor is increased by 0.1% * Tmax;

[0062] If Ps < P1 + P2 +... + Pn, the set torque of each motor is decreased by 0.1% * Tmax;

[0063] If the above two conditions are not met (i.e., approximately equal), the torque is not adjusted.

[0064] (5) PID torque loop processing: PID control processing is performed on the motor torque.

[0065] (6) System stability judgment: After multiple adjustments, Ps = P1 + P2 + ... + Pn, achieving system stability.

[0066] This embodiment also provides a multi-motor system constant air volume control device, which is used to implement the above-mentioned embodiments and preferred embodiments. Details already described will not be repeated here. As used below, the term "module" may refer to a combination of software and / or hardware that implements a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, implementation using hardware, or a combination of software and hardware, is also possible and contemplated.

[0067] This embodiment provides a multi-motor system constant air volume control device, such as Figure 4 Shown, including:

[0068] A model building module is used to establish a constant air volume model based on the total power and torque values of the multi-motor system under different static pressures and different target air volumes;

[0069] A calculation module is used to calculate the target bus power based on the current target air volume through a constant air volume model;

[0070] A comparison module, used for comparing the total power value of the multi-motor system under the current static pressure with the target bus power;

[0071] The regulating module is used to regulate the torque of each motor according to the constant air volume model and the comparison result.

[0072] The further functional description of each of the above modules and units is the same as that of the above corresponding embodiments and will not be repeated here.

[0073] The multi-motor system constant air volume control device in this embodiment is presented in the form of a functional unit, where the unit refers to an ASIC (Application Specific Integrated Circuit) circuit, a processor and memory that executes one or more software or fixed programs, and / or other devices that can provide the above functions.

[0074] The embodiment of the present invention also provides a computer device having the above Figure 4 The multi-motor system constant air volume control device shown.

[0075] See also Figure 5 , Figure 5 is a structural diagram of a computer device provided by an optional embodiment of the present invention, such as Figure 5As shown, the computer device includes: one or more processors 10, memory 20, and interfaces for connecting various components, including high-speed interfaces and low-speed interfaces. Various components utilize different buses to communicate with each other and can be installed on a common mainboard or installed in other ways as needed. The processor can process the instructions executed in the computer device, including instructions stored in the memory or on the memory to display the graphical information of the GUI on an external input / output device (such as, a display device coupled to the interface). In some optional embodiments, if necessary, multiple processors and / or multiple buses can be used together with multiple memories and multiple memories. Equally, multiple computer devices can be connected, and each device provides part of the necessary operations (for example, as a server array, a group of blade servers, or a multi-processor system). Figure 5 A processor 10 is taken as an example.

[0076] The processor 10 may be a central processing unit, a network processor, or a combination thereof. The processor 10 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit, a programmable logic device, or a combination thereof. The programmable logic device may be a complex programmable logic device, a field programmable gate array, a general purpose array logic, or any combination thereof.

[0077] The memory 20 stores instructions that can be executed by at least one processor 10, so as to enable at least one processor 10 to execute the method shown in the above embodiment.

[0078] The memory 20 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and application programs required for at least one function; the data storage area may store data created based on the use of the computer device, etc. In addition, the memory 20 may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage device. In some optional embodiments, the memory 20 may optionally include a memory remotely located relative to the processor 10, and these remote memories may be connected to the computer device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0079] The memory 20 may include a volatile memory, such as a random access memory; the memory may also include a non-volatile memory, such as a flash memory, a hard disk or a solid-state drive; the memory 20 may also include a combination of the above types of memory.

[0080] The computer device further includes an input device 30 and an output device 40. The processor 10, the memory 20, the input device 30 and the output device 40 may be connected via a bus or other means. Figure 5 The bus connection is taken as an example.

[0081] The input device 30 can receive input digital or character information and generate key signal input related to user settings and function control of the computer device, such as a touch screen, a keypad, a mouse, a trackpad, a touch pad, an indicator stick, one or more mouse buttons, a trackball, a joystick, etc. The output device 40 can include a display device, an auxiliary lighting device (e.g., an LED), and a tactile feedback device (e.g., a vibration motor). The above-mentioned display device includes but is not limited to a liquid crystal display, a light emitting diode, a display, and a plasma display. In some optional embodiments, the display device can be a touch screen.

[0082] The embodiment of the present invention also provides a computer-readable storage medium. The above-mentioned method according to the embodiment of the present invention can be implemented in hardware, firmware, or implemented as a computer code that can be recorded in a storage medium, or implemented as a computer code that is originally stored in a remote storage medium or a non-temporary machine-readable storage medium and downloaded through a network and will be stored in a local storage medium, so that the method described herein can be stored in such software processing on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. Among them, the storage medium can be a magnetic disk, an optical disk, a read-only storage memory, a random access memory, a flash memory, a hard disk or a solid-state drive, etc.; further, the storage medium can also include a combination of the above-mentioned types of memory. It can be understood that a computer, a processor, a microprocessor controller or programmable hardware includes a storage component that can store or receive software or computer code. When the software or computer code is accessed and executed by a computer, a processor or hardware, the method shown in the above embodiment is implemented.

[0083] A portion of the present invention may be applied as a computer program product, such as a computer program instruction, which, when executed by a computer, can call or provide the method and / or technical solution according to the present invention through the operation of the computer. Those skilled in the art should understand that the form in which the computer program instruction exists in a computer-readable medium includes, but is not limited to, a source file, an executable file, an installation package file, etc. Accordingly, the way in which the computer program instruction is executed by the computer includes, but is not limited to: the computer directly executes the instruction, or the computer compiles the instruction and then executes the corresponding compiled program, or the computer reads and executes the instruction, or the computer reads and installs the instruction and then executes the corresponding installed program. Here, the computer-readable medium may be any available computer-readable storage medium or communication medium that can be accessed by the computer.

[0084] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention. Such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A method for controlling constant air volume in a multi-motor system, characterized in that: include: A constant air volume model is established based on the total power and torque values of the multi-motor system under different static pressures and different target air volumes. Calculate the target bus power based on the current target air volume using the constant air volume model; Compare the total power value of the multi-motor system at the current target air volume with the target bus power; The torque of each motor is adjusted according to the constant air volume model and the comparison result.

2. The multi-motor system constant air volume control method according to claim 1, characterized in that: The process of establishing a constant air volume model includes: Under the target static pressure, control each motor to operate at the target air volume; Collect bus power and torque of each motor; Adjust the target air volume, and return to the step of "controlling each motor to operate at the target air volume under the target static pressure" until the bus power and torque of each motor under the current target static pressure and different target air volumes are collected; Adjust the target static pressure, and return to the step of "controlling each motor to operate at the target air volume under the target static pressure" until the bus power and torque of each motor under different target static pressures and different target air volumes are collected; The sum of the bus power of each motor is taken as the total power value of the multi-motor system; Based on the total power value of the multi-motor system and the torque value of each motor under different target static pressures and different target air volumes, curve fitting is performed to generate a constant air volume model.

3. The multi-motor system constant air volume control method according to claim 2, characterized in that: The process of adjusting the torque of each motor includes: If the total power value of the multi-motor system is greater than the target bus power at the current target air volume, the torque of each motor is reduced simultaneously with a first adjustment step size; if the total power value of the multi-motor system is less than the target bus power at the current target air volume, the torque of each motor is increased simultaneously with a second adjustment step size; The above steps are repeated until the total power value of the multi-motor system is equal to the target bus power at the current target air volume.

4. The multi-motor system constant air volume control method according to claim 2, characterized in that: The absolute values of the adjustment amounts of the first adjustment step and the second adjustment step are equal.

5. The multi-motor system constant air volume control method according to claim 1, characterized in that: Before comparing the total power value of the multi-motor system at the current static pressure with the target bus power, the following is also included: Set the current target air volume and control each motor to start at the lowest torque.

6. A multi-motor system constant air volume control device, characterized in that: include: A model building module is used to establish a constant air volume model based on the total power and torque values of the multi-motor system under different static pressures and different target air volumes; A calculation module, configured to calculate the target bus power according to the current target air volume through the constant air volume model; A comparison module, used for comparing the total power value of the multi-motor system under the current static pressure with the target bus power; The regulating module is used to regulate the torque of each motor according to the constant air volume model and the comparison result.

7. A computer device, characterized in that: include: A memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the multi-motor system constant air volume control method according to any one of claims 1 to 5 by executing the computer instructions.

8. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a computer to execute the multi-motor system constant air volume control method according to any one of claims 1 to 56.

9. A computer program product, characterized in that The method comprises computer instructions for causing a computer to execute the multi-motor system constant air volume control method according to any one of claims 1 to 5.

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