A variable frequency power frequency switching method, device, electronic equipment and storage medium

Abstract

The present application relates to the field of inverter data analysis and control technology, and in particular to a method, device, electronic device, and storage medium for switching between variable frequency and industrial frequency. The method includes obtaining the current cooling temperature; if the current cooling temperature is lower than the set temperature, adjusting the current variable frequency power multiple times; recording the variable frequency power change value and the cooling temperature change value before and after each adjustment, and judging whether there is an abnormality in the change ratio based on the change ratio of each power change value to the temperature change value and the preset standard ratio; if there is an abnormality in the change ratio, generating a warning signal and obtaining the industrial frequency signal corresponding to the current moment; adjusting the variable frequency signal corresponding to the current variable frequency power based on the industrial frequency signal; when it is detected that the variable frequency signal is consistent with the industrial frequency signal, closing the variable frequency power supply path of the air conditioner and controlling the industrial frequency power supply path to open. The present application can promptly detect abnormalities in the operation of the air conditioner compressor, thereby reducing the probability of failure of the air conditioner during operation.

Description

Technical Field

[0001] The present application relates to the technical field of inverter data analysis and control, and in particular to a variable frequency power frequency switching method, device, electronic equipment and storage medium. Background Art

[0002] Air conditioning is an indispensable part of our lives, especially in the hot summer. The heat in the room is discharged through the air conditioning refrigeration cycle. In the traditional refrigeration cycle, a temperature limit is usually set before starting the refrigeration cycle. When the indoor temperature drops to the set temperature limit, the air conditioning compressor is automatically shut down. After the indoor temperature rises, the refrigeration cycle is started again by restarting the air conditioning compressor to cool down. However, since the air conditioning compressor, air conditioning condenser and air conditioning evaporator need to be started at the same time each time the air conditioning is started, each start-up consumes a lot of power, which may result in more electricity consumption. In order to save energy when using air conditioning, variable frequency air conditioners are gradually being chosen by more consumers.

[0003] Inverter air conditioners can automatically adjust the speed of the air conditioner compressor according to changes in indoor temperature, thereby maintaining a stable indoor temperature and avoiding the waste of electricity caused by frequent start and stop. However, when using an inverter air conditioner for cooling or heating, the air conditioner compressor may be in working condition for a long time, so the air conditioner compressor is prone to failure. Once the air conditioner compressor fails, the entire air conditioner will not be able to operate normally. Therefore, there is an urgent need for a method to reduce the probability of failure during the operation of the air conditioner. Summary of the Invention

[0004] In order to promptly detect abnormalities in the operation of an air-conditioning compressor, thereby reducing the probability of failure of the air-conditioning during operation, the present application provides a variable frequency power frequency switching method, device, electronic equipment and medium.

[0005] In a first aspect, the present application provides a variable frequency power frequency switching method, which adopts the following technical solution:

[0006] A variable frequency power frequency automatic switching method, comprising:

[0007] Get the current cooling temperature;

[0008] If the current cooling temperature is lower than the set temperature, the current variable frequency power is adjusted multiple times;

[0009] Record the variable frequency power change value and the cooling temperature change value before and after each adjustment, and determine the change ratio of the power change value to the temperature change value each time;

[0010] According to the change ratio of each power change value to the temperature change value and the preset standard ratio, determine whether the change ratio is abnormal;

[0011] If the change ratio is abnormal, a warning signal is generated and the power frequency signal corresponding to the current moment is obtained;

[0012] adjusting the frequency conversion signal corresponding to the current frequency conversion power according to the power frequency signal;

[0013] When it is detected that the variable frequency signal is consistent with the industrial frequency signal, the variable frequency power supply path of the air conditioner is closed, and the industrial frequency power supply path is controlled to be opened.

[0014] By adopting the above technical solution, since the variable frequency air conditioner can automatically adjust the working power of the internal inverter according to the indoor temperature, instead of making the inverter always run at maximum power, energy saving is achieved by automatically adjusting the operating power of the inverter. When the inverter is working normally, there is a corresponding relationship between the power change of the inverter and the temperature change. Therefore, the health of the inverter inside the variable frequency air conditioner can be monitored by the ratio of the power change to the temperature change. If the current cooling temperature is not matched with the current power, it indicates that the inverter may be working abnormally. However, since the corresponding relationship between the power change and the temperature change is not only related to the state of the inverter, but also to the current power, the inverter may also be working abnormally. It is also related to the stability of the power supply bus. Therefore, when the current cooling temperature does not meet the standard, the adjusted power change value is compared with the temperature change value to improve the accuracy of judging whether the inverter has potential abnormalities. If it is determined that the inverter may have potential abnormalities based on the change ratio, the variable frequency power supply mode is switched to the industrial frequency power supply mode in time, instead of repairing the air conditioner when the air conditioner stops cooling due to inverter damage. When the power supply mode is switched, the variable frequency signal is adjusted to be consistent with the industrial frequency signal, and then the industrial frequency signal is used to power the air conditioner, so as to reduce the impact current generated when the power supply mode is switched, thereby reducing the probability of failure of the air conditioner during operation.

[0015] In one possible implementation, before determining whether the change ratio is abnormal based on the change ratio of each power change value to the temperature change value and a preset standard ratio, the method further includes:

[0016] Generate multiple groups of change value arrays based on the variable frequency power change values ​​and the refrigeration temperature change values ​​after multiple adjustments, wherein each data includes a variable frequency power change value and a corresponding refrigeration temperature change value;

[0017] Performing unsupervised anomaly detection on the multiple groups of change value arrays to obtain a deviation degree value corresponding to each change value array;

[0018] Comparing the deviation value corresponding to each change value array with a preset deviation limit to obtain a noise reduction change value array; wherein, judging whether the change ratio is abnormal based on the change ratio of each power change value to the temperature change value and the preset standard ratio includes:

[0019] Based on the power change value and temperature change value contained in each noise reduction array, the change ratio corresponding to each noise reduction data is determined; the change ratio corresponding to each noise reduction array is matched with the preset standard ratio, and based on the matching degree between the change ratio corresponding to the noise reduction array and the preset standard ratio, it is determined whether the change ratio corresponding to each noise reduction array is abnormal.

[0020] By adopting the above technical solution, by analyzing the change ratio between multiple groups of power change values ​​and temperature change values, it is determined whether there is a potential abnormality in the inverter, which is convenient for reducing data randomness. By analyzing multiple change value arrays, it is convenient to improve the accuracy of the judgment result. Since there may be errors when adjusting the power multiple times and recording the adjusted temperature, if the error is large, it may affect the judgment result. Therefore, before analyzing and judging based on multiple groups of data, the abnormal data in the multiple groups of data can be eliminated through noise reduction processing, which is convenient for further improving the accuracy of the judgment result.

[0021] In one possible implementation, adjusting the variable frequency signal corresponding to the current variable frequency power according to the power frequency signal includes:

[0022] Identify the power frequency phase sequence and power frequency phase corresponding to the power frequency signal, and the frequency conversion phase sequence and frequency conversion phase of the frequency conversion signal corresponding to the current frequency conversion power;

[0023] Comparing the power frequency phase sequence and the power frequency phase of the power frequency signal with the variable frequency phase sequence and the variable frequency phase of the variable frequency signal to determine a phase sequence difference and a phase difference;

[0024] The frequency conversion signal is adjusted according to the phase sequence difference and the phase difference.

[0025] By adopting the above technical solution, since the variable frequency power of the inverter is greatly different from the industrial frequency power, when switching between variable frequency and industrial frequency, the variable frequency signal and the industrial frequency signal can be adjusted to be consistent, thereby reducing the current impact generated during power switching, and thus facilitating the reduction of damage to the air conditioner caused by the current impact during power switching. When adjusting the variable frequency signal, the phase sequence difference and phase difference between the variable frequency signal and the industrial frequency signal can be calculated for rapid adjustment, thereby facilitating the improvement of the switching rate between variable frequency and industrial frequency.

[0026] In one possible implementation, before obtaining the power frequency signal corresponding to the moment when the adjustment is completed, the method further includes: determining a second preset time period based on the current moment, and obtaining associated operation information of the air conditioner within the preset time period, the associated operation information including the operating power and energy conversion amount of an associated device of the air conditioner within the second preset time period; and determining whether the associated device has an operating abnormality based on a ratio between the operating power of the associated device and the energy conversion amount and a preset standard energy ratio corresponding to the associated device;

[0027] If there is no operating abnormality in the associated equipment, a power frequency signal is obtained to perform a switching operation.

[0028] By adopting the above technical solution, after detecting that there is an abnormality in the change ratio between the power change value and the temperature change value corresponding to the air conditioner, it is also possible to detect whether there is an operation abnormality in the associated equipment of the air conditioner, so as to judge whether the abnormality in the change ratio corresponding to the air conditioner is related to the power supply bus. If there is no operation abnormality in the associated equipment, the abnormality of the power supply bus can be ruled out. By judging whether there is an operation abnormality in the associated equipment, the probability of incorrect switching between variable frequency and industrial frequency can be reduced.

[0029] In one possible implementation, after controlling the power frequency power supply path to be opened, the method further includes:

[0030] Record the working time of the power frequency power supply path;

[0031] Compare the working time with the preset standard time. If the working time is longer than the standard time, determine whether a maintenance completion signal has been received. If so, control the original frequency conversion path to open.

[0032] If not, the frequency conversion path corresponding to the standby frequency converter is controlled to be opened.

[0033] By adopting the above technical solution, when the air conditioner is powered by industrial frequency, the operating power of the air conditioner will not change due to changes in the cooling temperature. Instead, when the cooling temperature reaches the set temperature, the air conditioner stops running and restarts after the temperature rises to a certain temperature value. Since a large power is required at the moment of starting and stopping, frequent starting and stopping will lead to increased power consumption, and the inrush current generated at the moment of starting and stopping may shorten the service life of the air conditioner. Therefore, when a potential abnormality of the air conditioner inverter is detected and the power supply path is switched to the industrial frequency power supply path, the power consumption of the air conditioner is saved by switching from the industrial frequency power supply to the variable frequency power supply within the standard time, and the performance of the air conditioner is ensured. If the working time of the industrial frequency power supply path has exceeded the preset standard time, but the original inverter has not yet completed maintenance or has not yet been repaired, a spare inverter can be connected to the power supply path to realize industrial frequency variable frequency switching. By promptly connecting the spare inverter to the power supply path, the damage to the air conditioner caused by long-term trial use of industrial frequency power supply can be reduced.

[0034] In one possible implementation, the method further includes:

[0035] Acquire historical power supply data and determine the current power supply phase type, where the power supply phase type includes busy and non-busy;

[0036] Determining a target variable frequency power frequency switching frequency corresponding to the current power supply stage type according to a correspondence between the power supply stage type and the variable frequency power frequency switching frequency;

[0037] The working states of the variable frequency power supply path and the power frequency power supply path are controlled according to the target variable frequency power supply switching frequency, and the working states include open and closed.

[0038] By adopting the above technical solution and setting different switching frequencies, the air conditioner can realize automatic switching between variable frequency and industrial frequency during operation. In addition, since the probability of potential abnormality of the inverter of the air conditioner is different in different power supply stages, the actual switching frequency is determined by the historical power supply data of the air conditioner, rather than using the same switching frequency to switch in different power supply stages. This is convenient for improving the accuracy of the variable frequency and industrial frequency switching, thereby facilitating reducing the probability of failure of the air conditioner during busy working stages.

[0039] In one possible implementation, after generating the warning signal, the method further includes:

[0040] Obtaining the operating power of the inverter in the air conditioner during the first preset time period, where the operating power of the inverter includes the operating power of each component in the inverter during the first preset time period;

[0041] Determining a maximum operating power change value of each component within the first preset time period based on the historical operating power of the inverter;

[0042] Determine as an abnormal component a component whose maximum operating power variation value exceeds a preset standard variation value;

[0043] The warning signal is optimized according to the abnormal component.

[0044] By adopting the above technical solution, when it is determined that there may be a potential abnormality in the inverter, the operating information of each component in the inverter is analyzed to determine the abnormal component that causes the potential abnormality in the inverter, and the abnormal component is written into the warning signal so that relevant personnel can repair the abnormal component as soon as possible after receiving the warning signal, thereby facilitating the improvement of the speed of repairing the inverter with potential abnormality.

[0045] In a second aspect, the present application provides a variable frequency power frequency switching device, which adopts the following technical solution:

[0046] A variable frequency power frequency switching device, comprising:

[0047] Get temperature module, used to get current cooling temperature;

[0048] a power adjustment module, configured to adjust the current variable frequency power multiple times within a first preset time period if the current cooling temperature is lower than a set temperature;

[0049] A change ratio determination module is used to record the variable frequency power change value and the refrigeration temperature change value before and after each adjustment, and determine the change ratio of the power change value to the temperature change value each time;

[0050] An abnormality judgment module is used to judge whether there is an abnormality in the change ratio based on the change ratio of each power change value to the temperature change value and a preset standard ratio;

[0051] A power frequency signal acquisition module is used to generate a warning signal if there is an abnormality in the change ratio, and to acquire the power frequency signal corresponding to the moment when the adjustment is completed;

[0052] A signal adjustment module, configured to adjust the frequency conversion signal corresponding to the current frequency conversion power according to the power frequency signal;

[0053] The control switching module is used to close the variable frequency power supply path of the air conditioner and control the power frequency power supply path to open when it is detected that the variable frequency signal is consistent with the power frequency signal.

[0054] By adopting the above technical solution, since the variable frequency air conditioner can automatically adjust the working power of the internal inverter according to the indoor temperature, instead of making the inverter always run at maximum power, energy saving is achieved by automatically adjusting the operating power of the inverter. When the inverter is working normally, there is a corresponding relationship between the power change of the inverter and the temperature change. Therefore, the health of the inverter inside the variable frequency air conditioner can be monitored by the ratio of the power change to the temperature change. If the current cooling temperature is not matched with the current power, it indicates that the inverter may be working abnormally. However, since the corresponding relationship between the power change and the temperature change is not only related to the state of the inverter, but also to the current power, the inverter may also be working abnormally. It is also related to the stability of the power supply bus. Therefore, when the current cooling temperature does not meet the standard, the adjusted power change value is compared with the temperature change value to improve the accuracy of judging whether the inverter has potential abnormalities. If it is determined that the inverter may have potential abnormalities based on the change ratio, the variable frequency power supply mode is switched to the industrial frequency power supply mode in time, instead of repairing the air conditioner when the air conditioner stops cooling due to inverter damage. When the power supply mode is switched, the variable frequency signal is adjusted to be consistent with the industrial frequency signal, and then the industrial frequency signal is used to power the air conditioner, so as to reduce the impact current generated when the power supply mode is switched, thereby reducing the probability of failure of the air conditioner during operation.

[0055] In one possible implementation, the device further includes:

[0056] An array determination module is used to generate multiple groups of change value arrays according to the variable frequency power change values ​​and the refrigeration temperature change values ​​after multiple adjustments, wherein each data includes a variable frequency power change value and a corresponding refrigeration temperature change value;

[0057] a deviation degree determination module, configured to perform unsupervised anomaly detection on the plurality of change value arrays to obtain a deviation degree value corresponding to each change value array;

[0058] A noise reduction module is used to compare the deviation value corresponding to each change value array with a preset deviation limit to obtain a noise reduction change value array;

[0059] The abnormality judgment module is specifically used to judge whether there is an abnormality in the change ratio based on the change ratio of each power change value to the temperature change value and the preset standard ratio:

[0060] Based on the power change value and temperature change value contained in each noise reduction array, the change ratio corresponding to each noise reduction data is determined; the change ratio corresponding to each noise reduction array is matched with the preset standard ratio, and based on the matching degree between the change ratio corresponding to the noise reduction array and the preset standard ratio, it is determined whether the change ratio corresponding to each noise reduction array is abnormal.

[0061] In one possible implementation, when the signal adjustment module adjusts the frequency conversion signal corresponding to the current frequency conversion power according to the power frequency signal, it is specifically configured to:

[0062] Identify the power frequency phase sequence and power frequency phase corresponding to the power frequency signal, and the frequency conversion phase sequence and frequency conversion phase of the frequency conversion signal corresponding to the current frequency conversion power;

[0063] Comparing the power frequency phase sequence and the power frequency phase of the power frequency signal with the variable frequency phase sequence and the variable frequency phase of the variable frequency signal to determine a phase sequence difference and a phase difference;

[0064] The frequency conversion signal is adjusted according to the phase sequence difference and the phase difference.

[0065] In one possible implementation, the device further includes:

[0066] an associated operation information acquisition module, configured to determine a second preset time period based on the current moment, and acquire associated operation information of the air conditioner within the preset time period, the associated operation information including operating power and energy conversion amount of associated devices of the air conditioner within the second preset time period;

[0067] an operation abnormality judgment module, configured to judge whether the associated device has an operation abnormality based on a ratio between the operating power of the associated device and the energy conversion amount and a preset standard energy ratio corresponding to the associated device;

[0068] The execution module is used to obtain a power frequency signal to perform a switching operation if there is no operating abnormality in the associated equipment.

[0069] In one possible implementation, the device further includes:

[0070] The duration recording module is used to record the working duration of the power frequency power supply path;

[0071] The maintenance judgment module is used to compare the working time with the preset standard time. If the working time is longer than the standard time, it is judged whether the maintenance completion signal has been received. If so, the original frequency conversion path is controlled to open;

[0072] The control module is used to control the frequency conversion path corresponding to the standby frequency converter to open if the maintenance completion signal is not received.

[0073] In one possible implementation, the device further includes:

[0074] A module for obtaining historical power supply data, configured to obtain historical power supply data and determine the current power supply phase type, wherein the power supply phase type includes busy and non-busy;

[0075] A switching frequency determination module is used to determine a target variable frequency power frequency switching frequency corresponding to the current power supply stage type according to a correspondence between the power supply stage type and the variable frequency power frequency switching frequency;

[0076] The control switching module is used to control the working states of the variable frequency power supply path and the power frequency power supply path according to the target variable frequency power supply switching frequency, and the working states include open and closed.

[0077] In one possible implementation, the device further includes:

[0078] an operating power acquisition module, configured to acquire the operating power of the inverter in the air conditioner during the first preset time period, wherein the operating power of the inverter includes the operating power of each component in the inverter during the first preset time period;

[0079] a power change value determining module, configured to determine a maximum operating power change value of each component within the first preset time period based on the historical operating power of the inverter;

[0080] The abnormal component judgment module is used to determine the component whose maximum operating power change value exceeds the preset standard change value as an abnormal component; the optimization information module is used to optimize the warning signal according to the abnormal component.

[0081] In a third aspect, the present application provides an electronic device, which adopts the following technical solution:

[0082] An electronic device, comprising:

[0083] at least one processor;

[0084] Memory;

[0085] At least one application, wherein the at least one application is stored in a memory and configured to be executed by at least one processor, and the at least one application is configured to: execute the above-mentioned variable frequency and industrial frequency switching method.

[0086] In a fourth aspect, the present application provides a computer-readable storage medium, which adopts the following technical solution:

[0087] A computer-readable storage medium includes: a computer program stored therein that can be loaded by a processor and execute the variable frequency and power frequency switching method.

[0088] In summary, this application includes at least one of the following beneficial technical effects:

[0089] 1. Since the inverter air conditioner can automatically adjust the working power of the internal inverter according to the indoor temperature, instead of making the inverter run at maximum power all the time, energy saving is achieved by automatically adjusting the operating power of the inverter. When the inverter is working normally, there is a corresponding relationship between the power change of the inverter and the temperature change. Therefore, the health of the inverter inside the inverter air conditioner can be monitored by the ratio of the power change to the temperature change. If the current cooling temperature is not matched with the current power, it indicates that the inverter may be working abnormally. However, the corresponding relationship between the power change and the temperature change is not only related to the state of the inverter, but also to the supply. It is related to the stability of the electrical bus. Therefore, when the current cooling temperature does not meet the standard, the adjusted power change value is compared with the temperature change value to improve the accuracy of judging whether the inverter has potential abnormalities. If it is determined that the inverter may have potential abnormalities based on the change ratio, the variable frequency power supply mode is switched to the industrial frequency power supply mode in time, instead of repairing the air conditioner when the air conditioner stops cooling due to inverter damage. When the power supply mode is switched, the variable frequency signal is adjusted to be consistent with the industrial frequency signal, and then the industrial frequency signal is used to power the air conditioner, so as to reduce the impact current generated when the power supply mode is switched, thereby reducing the probability of failure of the air conditioner during operation.

[0090] 2. By analyzing the change ratio between multiple sets of power change values ​​and temperature change values, it is determined whether there is a potential abnormality in the inverter, which is convenient for reducing data randomness. By analyzing multiple change value arrays, it is convenient to improve the accuracy of the judgment results. Since there may be errors when adjusting the power multiple times and recording the adjusted temperature, if the error is large, it may affect the judgment result. Therefore, before analyzing and judging based on multiple sets of data, the abnormal data in the multiple sets of data can be eliminated through noise reduction processing to further improve the accuracy of the judgment result. BRIEF DESCRIPTION OF THE DRAWINGS

[0091] Figure 1 This is a flow chart of a variable frequency power frequency switching method in an embodiment of the present application;

[0092] Figure 2 This is a structural diagram of a variable frequency power frequency switching device in an embodiment of the present application.

[0093] Figure 3 It is a structural diagram of an electronic device in an embodiment of the present application. DETAILED DESCRIPTION

[0094] The following is combined with Figure 1-3 This application is described in further detail.

[0095] After reading this specification, those skilled in the art may make non-creative modifications to this embodiment as needed, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

[0096] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0097] Specifically, embodiments of the present application provide a variable frequency power frequency switching method, which is performed by an electronic device, which can be a server or a terminal device. The server can be an independent physical server, a server cluster or distributed system composed of multiple physical servers, or a cloud server providing cloud computing services. The terminal device can be a smartphone, tablet computer, laptop computer, desktop computer, etc., but is not limited to these. The terminal device and the server can be directly or indirectly connected via wired or wireless communication, which is not limited in the embodiments of the present application.

[0098] refer to Figure 1 , Figure 1 1 is a flow chart of a variable frequency power frequency switching method in an embodiment of the present application, the method comprising steps S110 to S170, wherein:

[0099] Step S110: obtaining the current cooling temperature.

[0100] Specifically, the current cooling temperature is the cooling temperature corresponding to the current moment. The current cooling temperature can be collected by a temperature collection device set in the cooling area and uploaded to the electronic device by the temperature collection device. The cooling area is the area where the air conditioner is set, and the corresponding cooling temperature is also used to characterize the temperature in the cooling area.

[0101] Step S120: If the current cooling temperature is lower than the set temperature, the current variable frequency power is adjusted multiple times within a first preset time period.

[0102] Specifically, during the air conditioning refrigeration process, the air conditioning compressor sucks in low-temperature, low-pressure refrigerant, compresses it into high-temperature, high-pressure refrigerant, and then transmits it to the air conditioning condenser. The heat dissipation effect of the air conditioning condenser cools the high-temperature, high-pressure refrigerant into high-temperature, low-pressure refrigerant. Finally, the high-temperature, low-pressure refrigerant enters the air conditioning evaporator through the air conditioning expansion valve to absorb indoor heat, thereby lowering the indoor temperature. Therefore, by controlling the switch of the air conditioning compressor, it is possible to control whether the air conditioning starts the refrigeration cycle. After controlling whether to start cooling by controlling the switch of the air conditioning compressor, the cooling effect can be adjusted according to the variable frequency power. Under the premise of a stable power grid, different variable frequency powers correspond to different cooling temperatures. If the current cooling temperature is lower than the set temperature, it means that the variable frequency power corresponding to the current moment is lower than the set variable frequency power corresponding to the set temperature. At this time, the variable frequency power can be increased or decreased to determine whether there is a potential abnormality in the inverter.

[0103] Among them, the first preset time period can be 2 minutes after the current moment, or 5 minutes after the current moment. There is no specific limitation in the embodiment of the present application, as long as the variable frequency power can be adjusted multiple times within the first preset time period.

[0104] Step S130: Record the variable frequency power change value and the cooling temperature change value before and after each adjustment, and determine the change ratio of the power change value to the temperature change value each time.

[0105] Specifically, the variable frequency power change value is used to characterize the difference between the power of the inverter before and after adjustment. For example, the input power of the air conditioner with a specification of 1 horsepower during cooling operation before adjustment is 700 watts, and the corresponding input power after adjusting the fixed incremental speed is 740 watts. At this time, the variable frequency power change value before and after adjustment is 40 watts (740-700=40 watts); the refrigeration temperature change value is used to characterize the difference between the temperature in the refrigeration area before and after adjustment. For example, the refrigeration temperature in the refrigeration area before adjustment is 24 degrees, and the refrigeration temperature in the refrigeration area after adjustment is 23 degrees. At this time, the refrigeration temperature change value before and after adjustment is 1 degree (24 degrees-23 degrees=1 degree).

[0106] Among them, since the inverter works in conjunction with the motor, the speed of the motor is adjusted to increase or decrease the cooling power of the inverter. The fixed incremental speed can be increased or decreased by 50 revolutions per second, or increased or decreased by 60 revolutions per second. The specific fixed incremental speed is not specifically limited in the embodiment of this application and can be set and modified by relevant technical personnel.

[0107] The ratio of power change to temperature change is: in:

[0108] ΔPower is used to represent the power change before and after adjustment;

[0109] ΔTemperature is used to represent the temperature change before and after adjustment.

[0110] The power change value and temperature change value must be recorded before and after each adjustment, and the corresponding change ratio before and after each adjustment must be determined in the above manner.

[0111] Step S140: judging whether the change ratio is abnormal based on the change ratio of each power change value to the temperature change value and a preset standard ratio.

[0112] Specifically, when the power grid is in a normal power supply state, there is a corresponding relationship between the power change value and the temperature change value, that is, the change in power corresponds to the change in temperature. If the change ratio of the power change value to the temperature change value is higher than the corresponding preset standard ratio, or lower than the corresponding preset standard ratio, it indicates that the change ratio is abnormal. Among them, the preset standard ratio is obtained by sorting out historical record data, and the historical record data contains power values ​​and temperature values ​​before and after multiple adjustments. According to the above method, it is judged whether there is an abnormality in the corresponding sub-change ratio before and after the multiple adjustments, and finally, it is determined whether there is an abnormality in the change ratio based on the abnormal judgment result corresponding to the sub-change ratio before and after the multiple adjustments.

[0113] Step S150: If there is an abnormality in the change ratio, a warning signal is generated, and the power frequency signal corresponding to the adjustment completion time is obtained.

[0114] Specifically, the generated warning signal is used to remind relevant staff to inspect or maintain the working status of the inverter. The warning signal can be in the form of generating a prompt message and sending the generated prompt message to the terminal device of the relevant staff, or it can be through broadcasting an early warning. The specific form of the warning message number is not specifically limited in the embodiment of this application, as long as it can remind the relevant staff.

[0115] The power frequency signal corresponding to the current moment is the signal in the power supply grid at the current moment. The signal phase and phase sequence corresponding to the power frequency power supply path can be determined through the power frequency signal. Among them, the phase (phase) refers to the position of a wave in the cycle at a specific moment, the scale at the peak, trough or a point in between; the phase sequence refers to the arrangement order of the brushless motor coils, which is the order in which the instantaneous value of the alternating current changes from negative to positive through zero. The phase sequence mainly affects the operation of the motor. If the phase sequence is connected in reverse, the motor will reverse.

[0116] The adjustment completion time is the last time in the first preset time period. For example, if the current time is 10:10 and the first preset time period is 10:10-10:12, the adjustment completion time is 10:12.

[0117] Step S160: adjusting the frequency conversion signal corresponding to the current frequency conversion power according to the power frequency signal.

[0118] Specifically, when adjusting the variable frequency signal according to the industrial frequency signal, that is, adjusting the phase and phase sequence of the variable frequency signal according to the phase and phase sequence corresponding to the industrial frequency signal, so that the phase and phase sequence of the variable frequency signal are consistent with the phase and phase sequence corresponding to the industrial frequency signal, since the power supply grid may have different industrial frequency signals corresponding to different power consumption periods, when switching the variable frequency signal to the industrial frequency signal, it is necessary to adjust the variable frequency signal according to the industrial frequency signal corresponding to the moment the adjustment is completed, rather than adjusting according to the industrial frequency signal obtained at any time.

[0119] Among them, when adjusting the variable frequency signal according to the phase and phase sequence corresponding to the industrial frequency signal, the phase sequence of the industrial frequency signal can be compared with the phase sequence of the variable frequency signal to determine the phase sequence difference between the two signals, and then the industrial frequency signal and the variable frequency signal are measured to determine the phase difference between the two signals. Finally, an adjustment signal is generated based on the phase sequence difference and the phase difference, so that relevant technicians can adjust the variable frequency signal according to the generated adjustment signal.

[0120] Step S170: When it is detected that the variable frequency signal is consistent with the industrial frequency signal, the variable frequency power supply path of the air conditioner is closed, and the industrial frequency power supply path is controlled to be opened.

[0121] Specifically, when it is detected that the variable frequency signal is consistent with the industrial frequency signal, that is, the phase sequence and phase of the variable frequency signal are consistent with the phase sequence and phase of the industrial frequency signal, by adjusting the variable frequency signal to be consistent with the industrial frequency signal, it is convenient to reduce the current impact caused by switching the variable frequency power supply path to the industrial frequency power supply path. When it is detected that the variable frequency signal is consistent with the industrial frequency signal, the electronic device generates a closing instruction, the closing instruction is used to control the closing of the variable frequency power supply path, and the generated opening instruction is used to control the opening of the industrial frequency power supply path. When controlling the opening or closing of the variable frequency power supply path or the industrial frequency power supply path, the path switch can be automatically controlled to open or close, or the generated opening or closing instruction can be sent to the terminal device of the relevant staff, so that the relevant staff can perform manual switching when receiving the opening or closing instruction. The specific switching method is not specifically limited in the embodiment of the present application, as long as the switching between variable frequency and industrial frequency can be achieved.

[0122] In the embodiment of the present application, since the variable frequency air conditioner can automatically adjust the working power of the internal inverter according to the indoor temperature, instead of making the inverter always run at maximum power, energy saving is achieved by automatically adjusting the operating power of the inverter. When the inverter is working normally, there is a corresponding relationship between the power change and the temperature change of the inverter. Therefore, the health of the inverter inside the variable frequency air conditioner can be monitored by the ratio of the power change to the temperature change. If the current cooling temperature is monitored to be mismatched with the current power, it indicates that the inverter may be working abnormally. However, since the corresponding relationship between the power change and the temperature change is not only related to the state of the inverter, It is also related to the stability of the power supply bus. Therefore, when the current cooling temperature does not meet the standard, the adjusted power change value is compared with the temperature change value to improve the accuracy of judging whether the inverter has potential abnormalities. If it is determined based on the change ratio that the inverter may have potential abnormalities, the variable frequency power supply mode is switched to the industrial frequency power supply mode in time, instead of repairing the air conditioner when the air conditioner stops cooling due to inverter damage. When the power supply mode is switched, the variable frequency signal is adjusted to be consistent with the industrial frequency signal, and then the industrial frequency signal is used to power the air conditioner, so as to reduce the impact current generated when the power supply mode is switched, thereby reducing the probability of failure of the air conditioner during operation.

[0123] Furthermore, since the determination of whether the change ratio is abnormal is based on the sub-change ratios recorded after multiple adjustments, the data after each adjustment will affect the final judgment result. Before determining whether the change ratio is abnormal based on the change ratio of each power change value to the temperature change value and the preset standard ratio, the method further includes:

[0124] Based on the variable frequency power change values ​​and the refrigeration temperature change values ​​after multiple adjustments, multiple groups of change value arrays are generated, wherein each data includes a variable frequency power change value and a corresponding refrigeration temperature change value; the multiple groups of change value arrays are subjected to unsupervised anomaly detection to obtain a deviation degree value corresponding to each change value array; the deviation degree value corresponding to each change value array is compared with a preset deviation degree limit to obtain a noise reduction change value array;

[0125] Among them, according to the change ratio of each power change value and temperature change value and the preset standard ratio, it is judged whether the change ratio is abnormal, including: determining the change ratio corresponding to each noise reduction data according to the power change value and temperature change value contained in each noise reduction array; matching the change ratio corresponding to each noise reduction array with the preset standard ratio, and determining whether the change ratio corresponding to each noise reduction array is abnormal according to the matching degree between the change ratio corresponding to the noise reduction array and the preset standard ratio.

[0126] Specifically, when converting the variable frequency power change values ​​and the cooling temperature change values ​​before and after multiple adjustments into arrays, the variable frequency power change values ​​and the cooling temperature change values ​​before and after each adjustment can be imported into a pre-established coordinate system. The variable frequency power change value can be determined as the horizontal coordinate, or the cooling temperature change value can be used as the horizontal coordinate, and the coordinates of each point in the coordinate system can be determined as an array. The process of unsupervised anomaly detection for the unchanged value array can be to perform linear fitting on the determined multiple coordinates, calculate the deviation value of each coordinate point, determine the coordinate point whose deviation value exceeds the preset deviation limit as an outlier, and remove the outlier from the multiple arrays, thus completing anomaly detection and noise reduction processing. For example, there are four arrays, array a, array b, array c, and array d, and the corresponding deviation values ​​of each array are 6, 5, 7, and 15, respectively. At this time, if the preset deviation limit is 8, array d is determined to be an outlier array and is removed.

[0127] Determining whether the inverter has a potential abnormality by using multiple arrays contained in the noise reduction change value array improves the accuracy of the judgment result. Since the array deviation value is obtained by fitting the data of multiple arrays, and the change ratio corresponding to each array is obtained by comparing the power change value with the temperature change value, the corresponding deviation value of the array and the corresponding change ratio of the array may be different. For example, the deviation value of array a is 6, and the change ratio may be 35 (the power change value before and after adjustment is 70, and the temperature change value is 2); the deviation value of array b is 5, and the change ratio may be 40 (the power change value before and after adjustment is 120, and the temperature change value is 3); the deviation value of array c is 7, and the change ratio may be 45 (the power change value before and after adjustment is 180, and the temperature change value is 4). If the preset standard ratio is 50, since the change ratios corresponding to multiple arrays are all lower than the preset standard ratio, it can be determined that the inverter has a potential abnormality. When there are change ratios higher than the preset standard ratio and change ratios lower than the preset standard ratio in multiple arrays after noise reduction processing, it can be judged whether there is a potential abnormality in the inverter based on the proportion of the change ratios higher than the preset standard ratio in multiple arrays. When the proportion of the change ratios higher than the preset standard ratio in multiple arrays is higher than the preset proportion, it is determined that the inverter has a potential abnormality, where the preset proportion can be 50% or 80%. The specific value is not limited in the embodiments of the present application and can be set by relevant technical personnel.

[0128] Furthermore, in the method provided in the present application, when adjusting the frequency conversion signal corresponding to the current frequency conversion power according to the power frequency signal, the method includes:

[0129] Identify the power frequency phase sequence and power frequency phase corresponding to the power frequency signal, as well as the frequency conversion phase sequence and frequency conversion phase of the frequency conversion signal corresponding to the current frequency conversion power; compare the power frequency phase sequence and power frequency phase of the power frequency signal with the frequency conversion phase sequence and frequency conversion phase of the frequency conversion signal to determine the phase sequence difference and phase difference; and adjust the frequency conversion signal according to the phase sequence difference and phase difference.

[0130] Among them, when adjusting the variable frequency signal according to the phase and phase sequence corresponding to the industrial frequency signal, the phase sequence of the industrial frequency signal can be compared with the phase sequence of the variable frequency signal first. If the phase sequences are different, an instruction for adjusting the phase sequence is generated. The method of adjusting the signal phase sequence can be to sample the sinusoidal wave signals of the industrial frequency signal and the variable frequency signal through a phase sequence detection circuit and convert them into square wave signals, and input the signal into the single-chip microcomputer control circuit. The single-chip microcomputer control circuit then analyzes and compares the zero crossing points of the two square wave signals and makes a phase sequence judgment to obtain the phase sequence difference between the industrial frequency signal and the variable frequency signal. Finally, the phase sequence of the industrial frequency signal and the variable frequency signal is adjusted to be consistent according to the phase sequence difference. The specific method of adjusting the signal phase sequence is not specifically limited in the embodiment of the present application, as long as the phase sequence of the variable frequency signal can be adjusted to the phase sequence of the industrial frequency signal.

[0131] If the phases of the industrial frequency signal and the variable frequency signal are different, the industrial frequency signal and the variable frequency signal are measured by an oscilloscope to determine the phase difference between the two signals, and then the phase of the variable frequency signal is adjusted according to the phase difference. The specific method of adjusting the signal phase is not specifically limited in the embodiment of the present application, as long as the phase of the variable frequency signal can be adjusted to the phase of the industrial frequency signal.

[0132] Furthermore, since a large amount of calculations are required to keep the variable frequency signal consistent with the power frequency signal when switching from the variable frequency power supply path to the power frequency power supply path, accuracy in determining whether switching is required is particularly important. In the embodiment of the present application, after determining that the inverter may have a potential abnormality based on the ratio between the power change value and the temperature change value before and after adjustment, the following steps are further included:

[0133] A second preset time period is determined based on the current moment, and associated operating information of the air conditioner within the preset time period is obtained, the associated operating information including the operating power and energy conversion amount of associated equipment of the air conditioner within the second preset time period; based on a ratio between the operating power and the energy conversion amount of the associated equipment and a preset standard energy ratio corresponding to the associated equipment, it is determined whether the associated equipment has an operating abnormality; if the associated equipment does not have an operating abnormality, an industrial frequency signal is obtained to perform a switching operation.

[0134] Specifically, the second preset time period is different from the first preset time period, wherein the first preset time period can be 2 minutes after the current moment, or 5 minutes after the current moment, while the second preset time period is 5 minutes or 10 minutes after the current moment. The specific second preset time period is not specifically limited in the embodiment of the present application, as long as the second preset time period can include the first preset time period. The associated equipment of the air conditioner can be a device that uses the same power supply circuit as the air conditioner but a different inverter, such as a blower installed in the refrigeration area. The operating power of the associated equipment during the second preset time period can be measured by a power meter installed in the power supply circuit of the associated equipment and uploaded to the electronic device. When the blower is working, it can convert electrical energy into wind energy, and when the heater is working, it can convert electrical energy into thermal energy. The energy conversion amount is the ratio of the blower to convert electrical energy into wind energy, or the ratio of the heater to convert electrical energy into thermal energy. The wind energy can be measured by a wind energy collection device installed at the blower, and the thermal energy can be measured by a heat collection device installed at the heater.

[0135] The ratio between the operating power and energy conversion amount corresponding to the associated device is compared with the preset standard energy ratio to determine whether the associated device has any operating abnormality. Refer to the embodiment corresponding to the above step 140, which will not be repeated here. The preset standard energy ratio can be set by relevant technical personnel and is not specifically limited in the embodiment of this application.

[0136] If there is no abnormal operation of the associated equipment, it means that there is no abnormality in the total power supply path of the air conditioner and the associated equipment, and there is no abnormality in the inverter of the associated equipment. Therefore, it can be confirmed from another perspective that there may be potential abnormality in the inverter of the air conditioner.

[0137] In the embodiment of the present application, by detecting whether there are any operational abnormalities in the associated equipment of the air conditioner, it is determined whether the abnormality in the change ratio corresponding to the air conditioner is related to the power supply bus. If there are no operational abnormalities in the associated equipment, the abnormality in the power supply bus can be ruled out. By determining whether there are any operational abnormalities in the associated equipment, the probability of incorrect switching between variable frequency and industrial frequency can be reduced.

[0138] Furthermore, since long-term use of the power supply path may consume a lot of energy due to the frequent start and stop of the inverter, if the air conditioner has a backup inverter, after controlling the power supply path to be opened, it also includes:

[0139] Record the working time of the industrial frequency power supply path; compare the working time with the preset standard time. If the working time is longer than the standard time, determine whether the maintenance completion signal has been received. If so, control the original frequency conversion path to open; if not, control the frequency conversion path corresponding to the standby frequency converter to open.

[0140] Specifically, the timing can be started when the power supply path switching is completed to record the working time of the power frequency power supply path. When the working time of the power frequency power supply path exceeds the preset standard time, it is determined whether the frequency converter corresponding to the variable frequency power supply path has completed the maintenance work. If the original frequency converter has completed the maintenance work, then when the working time of the power frequency power supply path is higher than the preset standard time, the power frequency power supply path is switched to the variable frequency power supply path corresponding to the original frequency converter; if the original frequency converter has not completed the maintenance work, then when the working time of the power frequency power supply path is higher than the preset standard time, the power frequency power supply path is switched to the standby variable frequency power supply path corresponding to the standby frequency converter.

[0141] As the inverter's usage time increases, the possibility of inverter failure increases. Therefore, when the air conditioner has a backup inverter, it also includes:

[0142] Obtain historical power supply data and determine the current power supply stage type, which includes busy and non-busy. Based on the correspondence between the power supply stage type and the variable frequency and industrial frequency switching frequency, determine the target variable frequency and industrial frequency switching frequency corresponding to the current power supply stage type. Control the working status of the variable frequency power supply path and the industrial frequency power supply path according to the target variable frequency and industrial frequency switching frequency. The working status includes open and closed.

[0143] Specifically, the historical power supply data includes the power usage of the air conditioner in different historical power supply stages, wherein the power supply stage type can be determined based on the total power consumption of different power supply nodes. If the total power consumption corresponding to a certain power supply stage is higher than the preset total power consumption, the type corresponding to the power supply stage is determined to be busy; if the total power consumption corresponding to a certain power supply stage is not higher than the preset total power consumption, the type corresponding to the power supply stage is determined to be non-busy, wherein the preset total power consumption can be set by relevant technical personnel and is not specifically limited in the embodiments of the present application.

[0144] The variable frequency power frequency switching frequency is the frequency at which the variable frequency power supply path is switched to the power frequency power supply path, or vice versa. Different power supply stage types correspond to different variable frequency power frequency switching frequencies. When determining the variable frequency power frequency switching frequencies corresponding to different power supply stage types, the corresponding relationship between the power supply stage type and the variable frequency power frequency switching frequency can be determined. When switching the variable frequency power supply path and the power frequency power supply path according to the determined target variable frequency power frequency switching frequency, a target switching instruction can be generated based on the target variable frequency power frequency switching power, and the generated target switching instruction can be sent to the terminal device of the relevant staff to remind the relevant staff to switch. The generated target switching instruction can also be sent to the switches of the variable frequency power supply path and the power frequency power supply path to control the corresponding switches to open or close. The specific switching method is not specifically limited in the embodiment of the present application, as long as the variable frequency power supply path and the power frequency power supply path can be switched to each other. Before switching to each other, the variable frequency signal and the power frequency signal must be kept consistent. The adjustment method can refer to the embodiment corresponding to step 160 above and will not be repeated here.

[0145] Since the maintenance rate of the original inverter may affect the switching between the variable frequency power supply path and the industrial frequency power supply path, the maintenance efficiency of the original inverter is particularly important. The method also includes:

[0146] Obtain the operating power of the inverter in the air conditioner during a first preset time period, where the operating power of the inverter includes the operating power of each component in the inverter during the first preset time period; determine the maximum operating power change value of each component during the first preset time period based on the historical operating power of the inverter; determine the component whose maximum operating power change value exceeds the preset standard change value as an abnormal component; and optimize the warning signal based on the abnormal component.

[0147] Specifically, there are multiple components within the inverter. When a potential abnormality occurs in the inverter, the abnormal component can be identified by eliminating and screening the multiple components within the inverter for potential abnormalities. The abnormal component can then be sent along with the warning signal to relevant personnel, allowing them to quickly locate the maintenance point, thereby facilitating the maintenance of the original inverter. When determining the abnormal component from the multiple components, the determination can be made by analyzing whether the operating power of each component has changed within a first preset time period. If the operating power of a component changes significantly compared to the historical operating power within the first preset time period, the component is determined to be an abnormal component; if the operating power of a component changes less than the historical operating power within the first preset time period, the component is determined to be a normal component.

[0148] Among them, the first preset time period is the stage of multiple adjustments to the inverter, so each component will generate multiple sets of operating power. Using the operating power of each component in the first preset time period, it is more accurate to judge whether there is an abnormal component among multiple components.

[0149] Since each adjustment of the inverter within the first preset time period will cause the operating power of each component in the inverter to change, there may be multiple operating powers corresponding to each component within the first preset time period, and there are also multiple operating power change values ​​corresponding to each component, where the operating power change value is the difference between the operating power and the historical operating power. When judging whether each component has an abnormality, the maximum value of the operating power change values ​​among the multiple operating powers corresponding to the component can be used, or the average value of the operating power change values ​​among the multiple operating powers can be used, or the mode value of the operating power change values ​​among the multiple operating powers can be used. No specific limitation is made in the embodiments of the present application, as long as it can be determined whether the component has an abnormality. The preset standard change value can be set by relevant technical personnel and is not specifically limited in the embodiments of the present application.

[0150] The above embodiment introduces a variable frequency power frequency switching method from the perspective of method flow, and the following embodiment introduces a variable frequency power frequency switching device from the perspective of a virtual module or a virtual unit. For details, please refer to the following embodiment.

[0151] The embodiment of the present application provides a variable frequency power frequency switching device, such as Figure 2 As shown, the device may specifically include a temperature acquisition module 210, a power adjustment module 220, a change ratio determination module 230, an abnormality judgment module 240, a power frequency signal acquisition module 250, a signal adjustment module 260, and a first control switching module 270, wherein:

[0152] Get temperature module 210, used to obtain the current cooling temperature;

[0153] The power adjustment module 220 is configured to adjust the current variable frequency power multiple times within a first preset time period if the current cooling temperature is lower than the set temperature;

[0154] A change ratio determination module 230 is configured to record the variable frequency power change value and the cooling temperature change value before and after each adjustment, and determine the change ratio of the power change value to the temperature change value each time;

[0155] The abnormality judgment module 240 is used to judge whether there is an abnormality in the change ratio based on the change ratio of each power change value to the temperature change value and a preset standard ratio;

[0156] The power frequency signal acquisition module 250 is used to generate a warning signal if there is an abnormality in the change ratio, and to acquire the power frequency signal corresponding to the moment when the adjustment is completed;

[0157] The signal adjustment module 260 is used to adjust the frequency conversion signal corresponding to the current frequency conversion power according to the power frequency signal;

[0158] The first control switching module 270 is used to close the variable frequency power supply path of the air conditioner and control the power frequency power supply path to open when it is detected that the variable frequency signal is consistent with the power frequency signal.

[0159] In one possible implementation, the device further includes:

[0160] An array determination module is used to generate multiple groups of change value arrays according to the variable frequency power change values ​​and the refrigeration temperature change values ​​after multiple adjustments, wherein each data includes a variable frequency power change value and a corresponding refrigeration temperature change value;

[0161] A deviation degree determination module is used to perform unsupervised anomaly detection on multiple groups of change value arrays to obtain a deviation degree value corresponding to each change value array;

[0162] A noise reduction module is used to compare the deviation value corresponding to each change value array with a preset deviation limit to obtain a noise reduction change value array;

[0163] The abnormality determination module 240 is specifically configured to determine whether the change ratio is abnormal based on the change ratio of each power change value to the temperature change value and the preset standard ratio:

[0164] Based on the power change value and temperature change value contained in each noise reduction array, the change ratio corresponding to each noise reduction data is determined; the change ratio corresponding to each noise reduction array is matched with the preset standard ratio, and based on the matching degree between the change ratio corresponding to the noise reduction array and the preset standard ratio, it is determined whether the change ratio corresponding to each noise reduction array is abnormal.

[0165] In one possible implementation, when adjusting the frequency conversion signal corresponding to the current frequency conversion power according to the power frequency signal, the signal adjustment module 260 is specifically configured to:

[0166] Identify the power frequency phase sequence and power frequency phase corresponding to the power frequency signal, as well as the frequency conversion phase sequence and frequency conversion phase of the frequency conversion signal corresponding to the current frequency conversion power;

[0167] Compare the power frequency phase sequence and power frequency phase of the power frequency signal with the variable frequency phase sequence and variable frequency phase of the variable frequency signal to determine the phase sequence difference and phase difference;

[0168] The frequency conversion signal is adjusted according to the phase sequence difference and the phase difference.

[0169] In one possible implementation, the device further includes:

[0170] an associated operation information acquisition module, configured to determine a second preset time period based on the current moment, and acquire associated operation information of the air conditioner within the preset time period, the associated operation information including the operating power and energy conversion amount of the associated equipment of the air conditioner within the second preset time period;

[0171] An operation abnormality judgment module is used to judge whether an associated device has an operation abnormality based on the ratio between the operating power and the energy conversion amount of the associated device and the preset standard energy ratio corresponding to the associated device;

[0172] The execution module is used to obtain the power frequency signal to perform the switching operation if there is no operating abnormality in the associated equipment.

[0173] In one possible implementation, the device further includes:

[0174] The duration recording module is used to record the working duration of the power frequency power supply path;

[0175] The maintenance judgment module is used to compare the working time with the preset standard time. If the working time is longer than the standard time, it is determined whether the maintenance completion signal has been received. If so, the original frequency conversion path is controlled to open;

[0176] The control module is used to control the frequency conversion path corresponding to the standby frequency converter to open if the maintenance completion signal is not received.

[0177] In one possible implementation, the device further includes:

[0178] A module for obtaining historical power supply data is used to obtain historical power supply data and determine the current power supply stage type, which includes busy and non-busy stages;

[0179] The switching frequency determination module is used to determine the target variable frequency power frequency switching frequency corresponding to the current power supply stage type according to the corresponding relationship between the power supply stage type and the variable frequency power frequency switching frequency;

[0180] The second control switching module is used to control the working states of the variable frequency power supply path and the power frequency power supply path according to the target variable frequency power supply switching frequency, and the working states include open and closed.

[0181] In one possible implementation, the device further includes:

[0182] An operating power acquisition module is used to acquire the operating power of the inverter in the air conditioner within a first preset time period, where the operating power of the inverter includes the operating power of each component in the inverter within the first preset time period;

[0183] A power change value determination module, configured to determine a maximum operating power change value of each component within a first preset time period based on the historical operating power of the inverter;

[0184] The abnormal component judgment module is used to determine the component whose maximum operating power change value exceeds the preset standard change value as an abnormal component; the optimization information module is used to optimize the warning signal according to the abnormal component.

[0185] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0186] An electronic device is provided in an embodiment of the present application, such as Figure 3 As shown, Figure 3 The electronic device 300 shown includes a processor 301 and a memory 303. The processor 301 and the memory 303 are connected, for example, via a bus 302. Optionally, the electronic device 300 may further include a transceiver 304. It should be noted that in actual applications, the number of transceivers 304 is not limited to one, and the structure of the electronic device 300 does not constitute a limitation on the embodiments of the present application.

[0187] The processor 301 may be a CPU (Central Processing Unit), a general-purpose processor, a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It may implement or execute the various exemplary logic blocks, modules, and circuits described in conjunction with the disclosure of this application. The processor 301 may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and the like.

[0188] The bus 302 may include a path for transmitting information between the above components. The bus 302 may be a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus. The bus 302 may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 3 Only one thick line is used in the diagram, but this does not mean that there is only one bus or one type of bus.

[0189] The memory 303 may be a ROM (Read Only Memory) or other type of static storage device that can store static information and instructions, a RAM (Random Access Memory) or other type of dynamic storage device that can store information and instructions, or an EEPROM (Electrically Erasable Programmable Read Only Memory), a CD-ROM (Compact Disc Read Only Memory) or other optical disk storage, optical disk storage (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto.

[0190] The memory 303 is used to store application code for executing the solution of the present application, and the execution is controlled by the processor 301. The processor 301 is used to execute the application code stored in the memory 303 to implement the content shown in the above method embodiment.

[0191] The electronic devices include, but are not limited to, mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (personal digital assistants), PADs (tablet computers), PMPs (portable multimedia players), and in-vehicle terminals (e.g., in-vehicle navigation terminals), as well as fixed terminals such as digital TVs and desktop computers. Servers and the like are also possible. Figure 3 The electronic device shown is merely an example and should not limit the functions and scope of use of the embodiments of the present application.

[0192] An embodiment of the present application provides a computer-readable storage medium having a computer program stored thereon. When the computer-readable storage medium is run on a computer, the computer can execute the corresponding contents of the aforementioned method embodiment.

[0193] It should be understood that although the steps in the flowcharts of the accompanying drawings are shown in sequence as indicated by the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some of the steps in the flowcharts of the accompanying drawings may include multiple sub-steps or multiple stages, and these sub-steps or stages are not necessarily executed at the same time, but can be executed at different times, and their execution order is not necessarily sequential, but can be executed in turn or alternately with other steps or at least a portion of the sub-steps or stages of other steps.

[0194] The above description is only a partial implementation method of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A variable frequency power frequency switching method, characterized in that: include: Get the current cooling temperature; If the current cooling temperature is lower than the set temperature, adjusting the current variable frequency power multiple times within a first preset time period; Record the variable frequency power change value and the cooling temperature change value before and after each adjustment, and determine the change ratio of the power change value to the temperature change value each time; According to the change ratio of each power change value to the temperature change value and the preset standard ratio, determine whether the change ratio is abnormal; If the change ratio is abnormal, a warning signal is generated, and the power frequency signal corresponding to the moment when the adjustment is completed is obtained; adjusting the frequency conversion signal corresponding to the current frequency conversion power according to the power frequency signal; When it is detected that the variable frequency signal is consistent with the industrial frequency signal, the variable frequency power supply path of the air conditioner is closed and the industrial frequency power supply path is controlled to be opened; The adjusting the frequency conversion signal corresponding to the current frequency conversion power according to the power frequency signal includes: Identify the power frequency phase sequence and power frequency phase corresponding to the power frequency signal, and the frequency conversion phase sequence and frequency conversion phase of the frequency conversion signal corresponding to the current frequency conversion power; Comparing the power frequency phase sequence and the power frequency phase of the power frequency signal with the variable frequency phase sequence and the variable frequency phase of the variable frequency signal to determine a phase sequence difference and a phase difference; adjusting the frequency conversion signal according to the phase sequence difference and the phase difference; Before obtaining the power frequency signal corresponding to the adjustment completion moment, the method further includes: determining a second preset time period based on the current moment, and acquiring associated operation information of the air conditioner within the preset time period, the associated operation information including operating power and energy conversion amount of associated equipment of the air conditioner within the second preset time period; determining whether the associated device has an operating abnormality based on a ratio between the operating power of the associated device and the energy conversion amount and a preset standard energy ratio corresponding to the associated device; If there is no operating abnormality in the associated equipment, a power frequency signal is obtained to perform a switching operation.

2. A variable frequency power frequency switching method according to claim 1, characterized in that: Before determining whether the change ratio is abnormal based on the change ratio of each power change value to the temperature change value and the preset standard ratio, the method further includes: Generate multiple groups of change value arrays based on the variable frequency power change values ​​and the refrigeration temperature change values ​​after multiple adjustments, wherein each data includes a variable frequency power change value and a corresponding refrigeration temperature change value; Performing unsupervised anomaly detection on the multiple groups of change value arrays to obtain a deviation degree value corresponding to each change value array; Compare the deviation value corresponding to each change value array with the preset deviation limit to obtain a noise reduction change value array; The step of judging whether the change ratio is abnormal based on the change ratio of each power change value to the temperature change value and a preset standard ratio includes: Determine the change ratio corresponding to each noise reduction data according to the power change value and the temperature change value contained in each noise reduction array; The change ratio corresponding to each denoising array is matched with a preset standard ratio, and whether the change ratio corresponding to each denoising array is abnormal is determined based on the matching degree between the change ratio corresponding to the denoising array and the preset standard ratio.

3. The variable frequency power frequency switching method according to claim 1, characterized in that: After the power frequency power supply path is controlled to be opened, the method further includes: Record the working time of the power frequency power supply path; Compare the working time with the preset standard time. If the working time is longer than the standard time, determine whether a maintenance completion signal has been received. If so, control the original frequency conversion path to open. If not, the frequency conversion path corresponding to the standby frequency converter is controlled to be opened.

4. A variable frequency power frequency switching method according to claim 3, characterized in that: Also includes: Acquire historical power supply data and determine the current power supply phase type, where the power supply phase type includes busy and non-busy; Determining a target variable frequency power frequency switching frequency corresponding to the current power supply stage type according to a correspondence between the power supply stage type and the variable frequency power frequency switching frequency; The working states of the variable frequency power supply path and the power frequency power supply path are controlled according to the target variable frequency power supply switching frequency, and the working states include open and closed.

5. The variable frequency power frequency switching method according to claim 1, characterized in that: After the warning signal is generated, the method further includes: Obtaining the operating power of the inverter in the air conditioner during the first preset time period, where the operating power of the inverter includes the operating power of each component in the inverter during the first preset time period; Determining a maximum operating power change value of each component within the first preset time period based on the historical operating power of the inverter; Determine as an abnormal component a component whose maximum operating power variation value exceeds a preset standard variation value; The warning signal is optimized according to the abnormal component.

6. A variable frequency power frequency switching device, characterized in that: include: Get temperature module, used to get current cooling temperature; a power adjustment module, configured to adjust the current variable frequency power multiple times within a first preset time period if the current cooling temperature is lower than a set temperature; A change ratio determination module is used to record the variable frequency power change value and the refrigeration temperature change value before and after each adjustment, and determine the change ratio of the power change value to the temperature change value each time; An abnormality judgment module is used to judge whether there is an abnormality in the change ratio based on the change ratio of each power change value to the temperature change value and a preset standard ratio; A power frequency signal acquisition module is used to generate a warning signal if there is an abnormality in the change ratio, and to acquire the power frequency signal corresponding to the moment when the adjustment is completed; A signal adjustment module, configured to adjust the frequency conversion signal corresponding to the current frequency conversion power according to the power frequency signal; a control switching module, configured to close the variable frequency power supply path of the air conditioner and control the power frequency power supply path to open when detecting that the variable frequency signal is consistent with the power frequency signal; The signal adjustment module is specifically used to adjust the frequency conversion signal corresponding to the current frequency conversion power according to the power frequency signal: Identify the power frequency phase sequence and power frequency phase corresponding to the power frequency signal, and the frequency conversion phase sequence and frequency conversion phase of the frequency conversion signal corresponding to the current frequency conversion power; Comparing the power frequency phase sequence and the power frequency phase of the power frequency signal with the variable frequency phase sequence and the variable frequency phase of the variable frequency signal to determine a phase sequence difference and a phase difference; adjusting the frequency conversion signal according to the phase sequence difference and the phase difference; The device further comprises: an associated operation information acquisition module, configured to determine a second preset time period based on the current moment, and acquire associated operation information of the air conditioner within the preset time period, the associated operation information including operating power and energy conversion amount of associated devices of the air conditioner within the second preset time period; an operation abnormality judgment module, configured to judge whether the associated device has an operation abnormality based on a ratio between the operating power of the associated device and the energy conversion amount and a preset standard energy ratio corresponding to the associated device; The execution module is used to obtain a power frequency signal to perform a switching operation if there is no operating abnormality in the associated equipment.

7. An electronic device, characterized in that: The electronic device includes: at least one processor; Memory; At least one application, wherein the at least one application is stored in a memory and configured to be executed by at least one processor, and the at least one application is configured to: execute a variable frequency power frequency switching method according to any one of claims 1-5.

8. A computer-readable storage medium, characterized in that include: A computer program is stored which can be loaded by a processor and executes a variable frequency power frequency switching method according to any one of claims 1 to 5.

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