Frequency raising rate control method of compressor motor, air conditioner and storage medium

Abstract

The invention provides a frequency raising rate control method of a compressor motor, an air conditioner and a storage medium. The method comprises the steps that the compressor motor is controlled to enter a frequency raising state; acquiring input current of a compressor motor; when it is confirmed that the motor surge phenomenon occurs according to the input current, the current surge level is obtained; and determining the current frequency raising rate according to the surge level, and controlling the compressor motor to operate according to the current frequency raising rate. By applying the frequency raising rate control method of the compressor motor, the problem that the motor is prone to shutdown when reaching the surge point can be solved, the running stability of the motor is improved, hardware cost does not need to be increased, and the response speed is high.

Description

Technical Field

[0001] The present invention relates to the field of compressor control technology, and more specifically, to a frequency increase rate control method for a compressor motor, an air conditioner using the frequency increase rate control method for a compressor motor, and a computer-readable storage medium using the frequency increase rate control method for a compressor motor. Background Art

[0002] Variable frequency is the core function and main selling point of variable frequency air conditioners. At present, variable frequency air conditioners mostly use fixed frequency acceleration to increase the frequency. When the fixed frequency increase rate is too slow, it will easily cause surge when reaching the surge point, resulting in shutdown and irreversible damage to the motor. The surge point is an inherent property of the compressor and cannot be avoided.

[0003] At present, the main methods to solve the surge shutdown are changing the guide vane opening, adding a balancing valve, etc. The principle of changing the guide vane opening and adding a balancing valve is to reduce the suction and exhaust pressure difference when surge occurs, thereby solving the surge problem. However, changing the guide vane opening increases the complexity of control, and the response speed is slow and cannot produce results in time. Adding a balancing valve requires additional hardware and increases the complexity of control.

[0004] Therefore, it is necessary to consider a control method that does not require additional hardware and has simple control and fast response speed to adjust the motor frequency to solve the problem of surge shutdown. Summary of the invention

[0005] The first object of the present invention is to provide a frequency acceleration adjustment method which can solve the problem that the motor is prone to shutdown when it reaches the surge point, improve the stability of the motor operation, and has a fast response speed without increasing the hardware cost.

[0006] The second object of the present invention is to provide an air conditioner with a fast response speed that can solve the problem that the motor is prone to shut down when it reaches the surge point, improve the stability of the motor operation, and does not increase the hardware cost.

[0007] The third object of the present invention is to provide a computer-readable storage medium with a fast response speed that can solve the problem that the motor is prone to shutdown when it reaches the surge point, improve the stability of the motor operation, and does not increase the hardware cost.

[0008] In order to achieve the first purpose of the present invention, the frequency increase rate control method of the compressor motor provided by the present invention includes: controlling the compressor motor to enter the frequency increase state; obtaining the input current of the compressor motor; when the motor surge phenomenon is confirmed according to the input current, obtaining the current surge level; determining the current frequency increase rate according to the current surge level, and controlling the operation of the compressor motor according to the current frequency increase rate.

[0009] It can be seen from the above scheme that the frequency increase rate control method of the compressor motor of the present invention confirms whether surge occurs by obtaining the input current of the compressor motor when the compressor motor is in the frequency increase state, and the input current can reflect the operating state of the compressor motor in real time. When surge is about to occur or has occurred, the current of the motor will fluctuate significantly. By real-time monitoring of the input current, this change can be captured in time and responded quickly, thereby effectively avoiding further aggravation of surge or eliminating surge in time. Compared with some methods based on other indirect parameters or requiring complex calculations to judge surge, it has a shorter response time. At the same time, the input current of the motor can be directly measured, and there is no need to install additional complex sensors specifically for monitoring surge. This not only reduces the cost and complexity of the system, but also reduces the risk of misjudgment or control failure caused by sensor failure, and improves the reliability and stability of the system. In addition, by determining the current frequency increase rate according to the current surge level, it is possible to achieve refined control of the frequency increase process and improve control accuracy.

[0010] In a further solution, the step of confirming the occurrence of motor surge according to the input current includes: obtaining the peak-to-peak value of the input current, and confirming the occurrence of motor surge when the peak-to-peak value of the input current is greater than a first preset value.

[0011] It can be seen that under normal operation, the input current of the compressor motor is usually relatively stable, and its peak-to-peak value will remain within a small range. This is because stable motor operation means stable magnetic field and torque, which makes the current change relatively smooth. However, when the motor surges, the magnetic field and torque inside the motor will be strongly disturbed by the unstable airflow. This interference will cause large fluctuations in the motor current, which is manifested as an increase in the peak-to-peak value of the current. Surge will cause the periodic reverse and positive flow of the airflow inside the compressor to alternate, causing the motor load to change dramatically, and then causing the peak-to-peak value of the current to exceed the normal range. Therefore, confirming whether the motor surge phenomenon occurs by the peak-to-peak value of the current can quickly and accurately confirm the occurrence of surge phenomenon, which helps to improve the stability and reliability of the compressor system.

[0012] In a further embodiment, the step of obtaining the input current of the compressor motor includes obtaining the three-phase input current of the compressor motor.

[0013] It can be seen that by obtaining the three-phase input current of the compressor motor, when judging whether the motor has surge or other faults, it is possible to avoid missing some important information or even drawing wrong diagnostic conclusions by observing a single phase current.

[0014] In a further solution, when the motor surge phenomenon is confirmed based on the input current, when the peak-to-peak value of any phase input current of the three-phase input current is greater than a first preset value, the motor surge phenomenon is confirmed to occur.

[0015] It can be seen that the peak-to-peak value of any phase input current in the three-phase input current is used as the judgment basis, taking into account the surge judgment of the motor under complex conditions such as three-phase imbalance, and enhancing the reliability of the judgment method. As long as one of the phase currents is obviously abnormal, the surge phenomenon can be discovered in time, avoiding problems caused by the neglect of a single phase fault.

[0016] In a further scheme, the step of confirming the occurrence of motor surge based on the input current includes: obtaining the peak-to-peak value of the input current and obtaining the speed fluctuation value of the compressor motor. When the peak-to-peak value of the current is greater than a first preset value and the speed fluctuation value is greater than the first preset speed fluctuation value, the occurrence of motor surge is confirmed.

[0017] It can be seen that there may be misjudgments when judging surge only by the peak-to-peak value of the current. For example, when there is a short-term strong interference in the power grid or the motor itself has some non-surge-related electromagnetic transient processes, the peak-to-peak value of the current may briefly exceed the first preset value, but the motor may not necessarily surge at this time. The speed fluctuation value of the compressor motor can reflect the operating status of the motor from another perspective. When surge occurs, due to the unstable impact of the airflow, the load of the motor will show periodic and drastic changes, which will inevitably lead to fluctuations in the motor speed. When the peak-to-peak value of the current and the speed fluctuation value are combined for judgment at the same time, the accuracy and reliability of the surge judgment can be improved, and the occurrence of misjudgments can be effectively reduced.

[0018] In a further solution, the step of obtaining the current surge level includes: determining the current surge level according to a range of a peak-to-peak value of the input current.

[0019] It can be seen that the magnitude of the current peak-to-peak value can reflect the severity of the surge. When the motor surges, the more severe the surge, the greater the interference to the internal magnetic field and torque of the motor, the more severe the current fluctuation, and thus the greater the current peak-to-peak value. Therefore, the current surge level is determined according to the range of the current peak-to-peak value of the input current, and the surge level can be quickly determined according to the range in which it is located, providing a quick decision-making basis for taking corresponding control measures in a timely manner.

[0020] In a further scheme, the step of determining the current surge level according to the range of the peak-to-peak value of the input current includes: when the peak-to-peak value of the current is greater than the first preset value and less than or equal to the second preset value, the current surge level is the first level surge; when the peak-to-peak value of the current is greater than the second preset value and less than or equal to the third preset value, the current surge level is the second level surge; when the peak-to-peak value of the current is greater than the third preset value, the current surge level is the third level surge.

[0021] It can be seen that by determining the current surge level according to different ranges of the current peak-to-peak value, the surge problem can be dealt with more efficiently.

[0022] In a further solution, the step of determining the current frequency increase rate according to the current surge level includes: the frequency increase rates corresponding to the first level surge, the second level surge and the third level surge are gradually increased.

[0023] It can be seen that gradually increasing the frequency increase rate according to the surge level can achieve accurate response to surge phenomena of different severity. Different surge levels reflect the different operating crisis states of the compressor motor. By adjusting the frequency increase rate accordingly, the problem can be solved in a targeted manner, improving the effectiveness of the control strategy. Compared with the practice of using a fixed frequency increase rate or arbitrarily adjusting the frequency increase rate without considering the surge level, this method is more in line with the actual operating conditions and can better balance the relationship between suppressing surge and maintaining stable system operation.

[0024] In order to achieve the second objective of the present invention, the present invention provides an air conditioner including a processor and a memory, wherein the memory stores a computer program, and when the computer program is executed by the processor, the steps of the above-mentioned compressor motor frequency increase rate control method are implemented.

[0025] In order to achieve the third objective of the present invention, the present invention provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a controller, the steps of the above-mentioned compressor motor frequency increase rate control method are implemented. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a flow chart of an embodiment of a frequency increase rate control method of a compressor motor of the present invention.

[0027] The present invention is further described below in conjunction with the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0028] Embodiment of the frequency increase rate control method of the compressor motor:

[0029] The frequency increase rate control method of the compressor motor of the present invention is a computer program applied to the air conditioner and used for controlling the compressor.

[0030] like Figure 1 As shown, in this embodiment, when the frequency increase rate control method of the compressor motor is working, first, step S1 is executed to control the compressor motor to enter the frequency increase state. When it is necessary to control the compressor motor to enter the frequency increase state, the controller can send a gradually increasing frequency command value to the inverter to make the compressor motor run at the frequency increase rate. Preferably, the frequency increase rate is 3Hz / s.

[0031] After the compressor motor enters the frequency-increasing state, step S2 is executed to obtain the input current of the compressor motor. The input current of the compressor motor can reflect the operating state of the compressor motor in real time. When surge is about to occur or has occurred, the current of the motor will fluctuate significantly. Therefore, by real-time monitoring of the input current, such changes can be captured in time, so that whether the compressor motor has surge can be detected in time.

[0032] In this embodiment, the step of obtaining the input current of the compressor motor includes: obtaining the three-phase input current of the compressor motor. The compressor motor is usually powered by three phases, and each of the three-phase currents carries key information about the motor's operating status. The three-phase currents are interrelated and synergistic, and jointly determine the magnetic field distribution, torque generation, and overall energy conversion inside the motor. By obtaining the three-phase input current, it is equivalent to observing the operating status of the motor from multiple angles. Compared with monitoring only the single-phase current, it can more comprehensively and accurately reflect the actual working status of the motor. For example, whether the three-phase current is balanced can intuitively reflect whether there is a phase-to-phase fault in the motor, whether the load is evenly distributed, etc., which is crucial for judging whether the motor is operating normally and whether abnormal phenomena such as surge will occur. By obtaining the three-phase input current of the compressor motor, when judging whether the motor has surge or other faults, it can avoid observing a single phase current alone, which may miss some important information or even draw a wrong diagnostic conclusion.

[0033] After obtaining the input current of the compressor motor, step S3 is executed to determine whether motor surge occurs based on the input current.

[0034] In this embodiment, the step of determining whether the motor surge phenomenon occurs according to the input current includes: obtaining the peak-to-peak value of the input current, and confirming the motor surge phenomenon when the peak-to-peak value of the current is greater than a first preset value. Among them, the first preset value can be preset according to experimental data, and preferably, the first preset value is 10A. Under normal operation, the input current of the compressor motor is usually relatively stable, and its peak-to-peak value will also remain in a small range. This is because stable motor operation means stable magnetic field and torque, so that the current changes relatively smoothly. However, when the motor surges, the magnetic field and torque inside the motor will be strongly disturbed by the unstable airflow. This interference will cause the motor current to fluctuate greatly, which is manifested as an increase in the peak-to-peak value of the current. Surge can cause the periodic reverse flow and positive flow of the airflow inside the compressor to alternate, causing the motor load to change dramatically, and then causing the peak-to-peak value of the current to exceed the normal range. Therefore, confirming whether the motor surge phenomenon occurs by the peak-to-peak value of the current can quickly and accurately confirm the occurrence of the surge phenomenon, which helps to improve the stability and reliability of the compressor system.

[0035] In this embodiment, when judging whether the motor surge phenomenon occurs according to the input current, when the peak-to-peak value of any phase input current in the three-phase input current is greater than the first preset value, the motor surge phenomenon is confirmed to occur. The peak-to-peak value of any phase input current in the three-phase input current is used as the judgment basis, taking into account the surge judgment of the motor under complex conditions such as three-phase imbalance, and enhancing the reliability of the judgment method. As long as one of the phase currents is obviously abnormal, the surge phenomenon can be discovered in time, avoiding problems caused by the single-phase fault being ignored.

[0036] In an optional embodiment, the step of determining whether the motor surge phenomenon occurs according to the input current includes: obtaining the peak-to-peak value of the input current and obtaining the speed fluctuation value of the compressor motor, and when the peak-to-peak value of the current is greater than a first preset value and the speed fluctuation value is greater than the first preset speed fluctuation value, the motor surge phenomenon is confirmed to occur. The first preset speed fluctuation value can be preset according to experimental data.

[0037] The surge phenomenon is confirmed only when the current peak-to-peak value is greater than the first preset value and the speed fluctuation value is greater than the first preset speed fluctuation value. This dual-condition judgment logic can further exclude single parameter abnormalities caused by other non-surge factors. For example, slight wear of the motor bearing may cause a certain fluctuation in the motor current but a small fluctuation in the speed; or a small fluctuation in the grid frequency may cause a small fluctuation in the motor speed but the current peak-to-peak value does not exceed the surge threshold. Only when these two parameters meet the preset conditions at the same time can it be more reliably determined that the motor has surged, thereby providing an accurate basis for the subsequent effective surge control measures to ensure the stable, safe and efficient operation of the compressor system. There may be misjudgments when judging surge only by the current peak-to-peak value. For example, when there is a short-term strong interference in the grid or the motor itself has some non-surge-related electromagnetic transient processes, the current peak-to-peak value may briefly exceed the first preset value, but the motor may not surge at this time. The speed fluctuation value of the compressor motor can reflect the operating state of the motor from another perspective. When surge occurs, due to the unstable impact of the airflow, the load of the motor will show periodic and drastic changes, which will inevitably lead to fluctuations in the motor speed. When the current peak-to-peak value and the speed fluctuation value are combined for judgment, the accuracy and reliability of surge judgment can be improved, and the occurrence of misjudgment can be effectively reduced. The speed fluctuation value of the compressor motor can be monitored in real time by a speed sensor (such as a photoelectric encoder, a Hall sensor, etc.) installed on the motor shaft. By collecting and processing the speed data over a period of time, the speed fluctuation is calculated. For example, the speed fluctuation value can be characterized by calculating the standard deviation, range and other statistics of the speed. This is a well-known technology for those skilled in the art and will not be described in detail here.

[0038] If the motor surge phenomenon is not confirmed according to the input current, then continue to execute step S2 to continuously detect the input current of the compressor motor. When the motor surge phenomenon is confirmed according to the input current, execute step S4 to obtain the current surge level. In order to confirm the severity of the surge phenomenon, it is necessary to obtain the current surge level so as to make corresponding control strategies and improve the control accuracy.

[0039] In this embodiment, the step of obtaining the current surge level includes: determining the current surge level according to the range of the peak-to-peak value of the input current. The magnitude of the peak-to-peak value of the current can reflect the severity of the surge. When the motor surges, the more severe the surge, the greater the interference to the internal magnetic field and torque of the motor, the more severe the current fluctuation, and thus the greater the peak-to-peak value of the current. Therefore, by determining the current surge level according to the range of the peak-to-peak value of the input current, the surge level can be quickly determined according to the range in which it is located, providing a quick decision-making basis for taking corresponding control measures in a timely manner.

[0040] The current surge level number can be set as needed. In this embodiment, the step of determining the current surge level according to the range of the current peak-to-peak value of the input current includes: when the current peak-to-peak value is greater than the first preset value and less than or equal to the second preset value, the current surge level is the first level surge; when the current peak-to-peak value is greater than the second preset value and less than or equal to the third preset value, the current surge level is the second level surge; when the current peak-to-peak value is greater than the third preset value, the current surge level is the third level surge. Among them, the second preset value and the third preset value can be pre-set according to experimental data. Preferably, the second preset value is 30A and the third preset value is 50A.

[0041] After the current surge level is obtained, step S5 is executed to determine the current frequency increase rate according to the current surge level, and the operation of the compressor motor is controlled according to the current frequency increase rate.

[0042] After the surge level is determined, the corresponding frequency increase rate can be obtained according to the surge level. The corresponding frequency increase rate obtained by the surge level can be preset according to experimental data. In this embodiment, the step of determining the current frequency increase rate according to the current surge level includes: the frequency increase rates corresponding to the first-level surge, the second-level surge and the third-level surge are gradually increased. When it is determined to be the first-level surge, it means that the surge phenomenon is relatively mild. At this time, the operating state of the compressor motor is less affected, and the corresponding frequency increase rate is relatively low. In this case, it is possible to gradually restore the compressor to a stable operating state by adjusting the motor frequency in a small and slow manner, avoiding further aggravation of the surge or causing other unstable factors due to the excessively fast frequency increase rate. For example, a small increase in the frequency increase rate can allow the airflow inside the compressor to have enough time to adapt to the change in the motor frequency, so that the flow state of the airflow gradually tends to be stable, thereby alleviating the surge phenomenon. For the second-level surge, the corresponding frequency increase rate is increased compared to the first-level surge. At this time, relying solely on a lower frequency increase rate may not be able to effectively suppress the surge, and it is necessary to speed up the frequency adjustment to change the working state of the compressor. A moderate frequency increase rate can adjust the operating parameters of the compressor more quickly without excessively impacting the system, so as to improve the airflow state and get out of the surge area as soon as possible. For example, by moderately accelerating the frequency increase, the working speed of the impeller can be changed, the airflow transmission between the various components inside the compressor can be optimized, and the unstable effect caused by surge can be reduced. When the third-level surge occurs, it indicates that the surge situation is already very serious and poses a great threat to the normal operation of the motor and the compressor. In this emergency situation, a relatively high frequency increase rate is required to quickly change the operating state of the compressor, get rid of the surge state as quickly as possible, and prevent more serious damage to the equipment. Because in severe surge, the airflow inside the compressor is highly turbulent. If the frequency increase rate is too slow, it may not be possible to restore the stable airflow and normal working state in time. Therefore, the frequency increase should be increased, and the motor frequency should be adjusted quickly so that the compressor can resume normal operation as soon as possible to ensure the safety of the entire system. Preferably, the frequency increase rate corresponding to the first-level surge is 4Hz / s; the frequency increase rate corresponding to the second-level surge is 5Hz / s; and the frequency increase rate corresponding to the third-level surge is 8Hz / s.

[0043] After determining the current frequency increase rate, the compressor motor can be controlled to operate according to the current frequency increase rate. The control system sends the corresponding frequency change command to the inverter according to the determined current frequency increase rate. For example, if the current frequency increase rate is 4Hz / s, the inverter will gradually increase the power supply frequency output to the motor within a unit time at this rate, so that the motor speed increases at the corresponding rhythm. At the same time, the inverter itself also has some protection functions and feedback adjustment mechanisms. It can monitor the operating status of the motor (such as current, voltage and other parameters) in real time. When an abnormal situation occurs (such as excessive current exceeding the set threshold), it will automatically adjust the output frequency or take corresponding protection measures to ensure that the motor will not be damaged during operation at the established frequency increase rate. When controlling the motor to operate at the current frequency increase rate, it is not a constant frequency increase, but a dynamic adjustment based on a variety of real-time monitoring data. On the one hand, continue to pay attention to the motor's input current, speed fluctuation and other parameters to determine whether the surge situation has improved. If the surge level is reduced after running at the current frequency increase rate for a period of time, it means that the adjustment is effective, and the motor can continue to be controlled at this rate or by fine-tuning the frequency increase rate appropriately; on the contrary, if the surge does not improve or even worsens, it is necessary to re-evaluate the frequency increase rate or take other auxiliary control measures (such as adjusting the inlet and outlet valves of the compressor, etc.). On the other hand, other operating status indicators of the motor should also be considered, such as the temperature of the motor. If the temperature rises too quickly and approaches the overheating protection threshold during the frequency increase process, even if the surge has not been completely eliminated, it is necessary to suspend the frequency increase or appropriately slow down the frequency increase rate to ensure the safe operation of the motor first, and then continue to adjust after the temperature drops to a reasonable range. Through this dynamic control method based on multi-parameter feedback, the compressor motor can operate as smoothly and safely as possible under different surge conditions, and finally get rid of the surge state and return to a normal and stable operating state.

[0044] As can be seen from the above, the frequency increase rate control method of the compressor motor of the present invention confirms whether surge occurs by obtaining the input current of the compressor motor when the compressor motor is in the frequency increase state, and the input current can reflect the operating state of the compressor motor in real time. When surge is about to occur or has occurred, the current of the motor will fluctuate significantly. By real-time monitoring of the input current, this change can be captured in time and responded quickly, thereby effectively avoiding further aggravation of surge or eliminating surge in time. Compared with some methods based on other indirect parameters or requiring complex calculations to judge surge, it has a shorter response time. At the same time, the input current of the motor can be directly measured, and there is no need to install additional complex sensors specifically for monitoring surge. This not only reduces the cost and complexity of the system, but also reduces the risk of misjudgment or control failure caused by sensor failure, and improves the reliability and stability of the system. In addition, by determining the current frequency increase rate according to the current surge level, it is possible to achieve refined control of the frequency increase process and improve control accuracy.

[0045] Air conditioner embodiment:

[0046] The air conditioner of this embodiment includes a controller, and when the controller executes a computer program, the steps in the above-mentioned compressor motor frequency increase rate control method embodiment are implemented.

[0047] For example, the computer program can be divided into one or more modules, one or more modules are stored in the memory and executed by the controller to complete the present invention. One or more modules can be a series of computer program instruction segments that can complete specific functions, and the instruction segments are used to describe the execution process of the computer program in the motor.

[0048] The air conditioner may include, but is not limited to, a controller and a memory. Those skilled in the art will appreciate that the motor may include more or fewer components, or a combination of certain components, or different components, for example, the air conditioner may also include input and output devices, network access devices, buses, etc.

[0049] For example, the controller may be a central processing unit (CPU), other general controllers, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general controller may be a microcontroller or any conventional controller, etc. The controller is the control center of the motor, and uses various interfaces and lines to connect the various parts of the entire motor.

[0050] The memory can be used to store computer programs and / or modules. The controller realizes various functions of the motor by running or executing the computer programs and / or modules stored in the memory, and calling the data stored in the memory. For example, the memory can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, an application required for at least one function (such as a sound receiving function, a sound conversion to text function, etc.), etc.; the data storage area can store data created according to the use of the mobile phone (such as audio data, text data, etc.), etc. In addition, the memory can include a high-speed random access memory, and can also include a non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), at least one disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0051] Computer readable storage medium embodiment:

[0052] If the air conditioner integrated module of the above embodiment is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the above compressor motor frequency increase rate control method embodiment can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by the controller, the steps of the above compressor motor frequency increase rate control method embodiment can be implemented. 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 storage medium can include: any entity or device that can carry computer program code, recording medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electrical carrier signal, telecommunication signal and software distribution medium. It should be noted that the content contained in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable media does not include electrical carrier signals and telecommunications signals.

[0053] It should be noted that the above are only preferred embodiments of the present invention, but the design concept of the invention is not limited thereto, and any non-substantial modifications made to the present invention using this concept also fall within the protection scope of the present invention.

Claims

1. A method for controlling the frequency increase rate of a compressor motor, characterized in that: include: Control the compressor motor to enter the frequency increase state; Obtaining an input current of the compressor motor; When the motor surge phenomenon is confirmed according to the input current, a current surge level is obtained; A current frequency increase rate is determined according to the current surge level, and the operation of the compressor motor is controlled according to the current frequency increase rate.

2. The method for controlling the frequency increase rate of a compressor motor according to claim 1, characterized in that: The steps of confirming the occurrence of motor surge according to the input current include: The peak-to-peak value of the input current is obtained, and when the peak-to-peak value of the current is greater than a first preset value, it is confirmed that a motor surge phenomenon occurs.

3. The method for controlling the frequency increase rate of a compressor motor according to claim 2, characterized in that: The step of obtaining the input current of the compressor motor comprises: The three-phase input current of the compressor motor is obtained.

4. The method for controlling the frequency increase rate of a compressor motor according to claim 3, characterized in that: When the motor surge phenomenon is confirmed according to the input current, when the peak-to-peak value of the input current of any phase of the three-phase input current is greater than a first preset value, the motor surge phenomenon is confirmed to occur.

5. The method for controlling the frequency increase rate of a compressor motor according to claim 1, characterized in that: The steps of confirming the occurrence of motor surge according to the input current include: The peak-to-peak value of the input current and the speed fluctuation value of the compressor motor are obtained. When the peak-to-peak value of the current is greater than a first preset value and the speed fluctuation value is greater than the first preset speed fluctuation value, it is confirmed that motor surge occurs.

6. The method for controlling the frequency increase rate of a compressor motor according to any one of claims 1 to 5, characterized in that: The steps to obtain the current surge level include: The current surge level is determined according to a range of a peak-to-peak value of the input current.

7. The method for controlling the frequency increase rate of a compressor motor according to claim 6, characterized in that: The step of determining the current surge level according to the range of the peak-to-peak value of the input current comprises: When the peak-to-peak value of the current is greater than the first preset value and less than or equal to the second preset value, the current surge level is the first level surge; When the peak-to-peak value of the current is greater than the second preset value and less than or equal to the third preset value, the current surge level is the second level surge; When the current peak-to-peak value is greater than the third preset value, the current surge level is the third level surge.

8. The method for controlling the frequency increase rate of a compressor motor according to claim 7, characterized in that: The step of determining the current frequency increase rate according to the current surge level comprises: The frequency increase rates corresponding to the first-level surge, the second-level surge, and the third-level surge are gradually increased.

9. An air conditioner, comprising a processor and a memory, characterized in that: The memory stores a computer program, and when the computer program is executed by the processor, the steps of the frequency increase rate control method of the compressor motor as claimed in any one of claims 1 to 8 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by the controller, the steps of the frequency increase rate control method of the compressor motor as claimed in any one of claims 1 to 8 are implemented.

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