Method and device for determining current threshold of power factor correction module

Abstract

The present disclosure relates to a method and device for determining a start-up current threshold of a power factor correction module, which solves the technical problem in the related art that when the air conditioner is in a light-load condition, the power factor correction module cannot work normally because the start-up current threshold of the power factor correction module is too high or too low. The method includes: when the air conditioner is in a light-load condition, setting the start-up current threshold of the power factor correction module of the air conditioner according to a preset light-load current interval; obtaining the state parameter of the power factor correction module corresponding to the start-up current threshold; performing light-load start-up verification on the power factor correction module according to the state parameter to determine whether the state parameter meets the preset light-load start-up condition; when the light-load start-up condition is not met, adjusting the start-up current threshold of the power factor correction module until the state parameter of the power factor correction module corresponding to the adjusted start-up current threshold meets the light-load start-up condition.

Description

Technical Field

[0001] The present disclosure relates to the technical field of air-conditioning control, and in particular to a method and device for determining a start-up current threshold of a power factor correction module. Background Art

[0002] The air-conditioning system mainly controls the bus voltage through PFC (Power Factor Correction) so that loads such as the compressor can operate reliably. Therefore, the reliability of PFC plays an important role in the stable operation of the air-conditioning system. The air-conditioning system will set the corresponding PFC start-up current threshold according to work requirements.

[0003] When the air conditioner is under light load conditions, there is a high frequency and low current situation. If the PFC start-up current threshold is too large, the PFC will not be able to meet the high-frequency operation requirements of the air-conditioning system. If the PFC start-up current threshold is too small, the PFC control will be unstable and the bus voltage will fluctuate. Therefore, it is necessary to determine a reasonable PFC start-up current threshold when the air conditioner is lightly loaded. Summary of the invention

[0004] In order to overcome the problems existing in the related art, the present disclosure provides a method and device for determining a start-up current threshold of a power factor correction module.

[0005] According to a first aspect of an embodiment of the present disclosure, a method for determining a start-up current threshold of a power factor correction module is provided, comprising:

[0006] When the air conditioner is in a light-load condition, setting a start-up current threshold of the power factor correction module of the air conditioner according to a preset light-load current interval;

[0007] Acquire a state parameter of the power factor correction module corresponding to the start-up current threshold;

[0008] Performing light-load start-up verification on the power factor correction module according to the state parameter to determine whether the state parameter satisfies a preset light-load start-up condition;

[0009] When the light-load startup condition is not met, the startup current threshold of the power factor correction module is adjusted until the state parameter of the power factor correction module corresponding to the adjusted startup current threshold meets the light-load startup condition.

[0010] Optionally, the acquiring the state parameter of the power factor correction module corresponding to the start-up current threshold includes:

[0011] Adjusting the frequency of the air conditioner so that the power factor correction module is turned on when the current of the power factor correction module is greater than the turn-on current threshold;

[0012] The current waveform and the minimum bus voltage of the power factor correction module are obtained within a preset time after the power factor correction module is turned on, and the state parameters include the current waveform and the minimum bus voltage.

[0013] Optionally, performing light-load startup verification on the power factor correction module according to the state parameter to determine whether the state parameter satisfies a preset light-load startup condition includes:

[0014] Determine whether the current waveform has fluctuations and distortions and whether the minimum bus voltage is greater than the difference between a preset start-up bus voltage and a preset fluctuating bus voltage threshold;

[0015] When there is no fluctuation and distortion in the waveform of the current and the minimum bus voltage is greater than the difference between the preset start-up bus voltage and the preset fluctuating bus voltage threshold, it is determined that the power factor correction module meets the light load start-up condition.

[0016] Optionally, when the light load start-up condition is not met, adjusting the start-up current threshold of the power factor correction module until a state parameter of the power factor correction module corresponding to the adjusted start-up current threshold meets the light load start-up condition, including:

[0017] When the light load start-up condition is not met, starting from the light load current lower limit value of the preset light load current interval, the value of the preset start-up current threshold is increased according to the preset increase amount until the state parameter of the power factor correction module corresponding to the adjusted start-up current threshold meets the light load start-up condition, or until the preset start-up current threshold increases to the light load current upper limit value of the preset current interval.

[0018] Optionally, when the air conditioner is in a light-load condition, setting a start-up current threshold of a power factor correction module of the air conditioner according to a preset light-load current interval includes:

[0019] When the air conditioner is in a light-load condition, the start-up current threshold of the power factor correction module of the air conditioner is set to the light-load current lower limit value of the preset light-load current interval.

[0020] Optionally, the current and bus voltage of the power factor correction module are obtained in the following manner:

[0021] When the air conditioner is in a light-load condition, the initial current of the power factor correction module and the initial bus voltage corresponding to the initial current are obtained multiple times to obtain a preset number of initial currents and initial bus voltages;

[0022] Determine a first average value of the preset number of initial currents, and use the first average value as the current of the power factor correction module;

[0023] Determine a second average value of the preset number of initial bus voltages, and use the second average value as the bus voltage of the power factor correction module;

[0024] The current and the bus voltage are used as state parameters of the power factor correction module.

[0025] Optionally, the obtaining an initial current of the power factor correction module and an initial bus voltage corresponding to the initial current includes:

[0026] Acquire a current signal of the power factor correction module and a bus voltage signal corresponding to the current signal;

[0027] The current signal and the bus voltage signal are respectively subjected to deep filtering and analog-to-digital conversion processing to obtain an initial current of the power factor correction module and an initial bus voltage corresponding to the initial current.

[0028] According to a second aspect of an embodiment of the present disclosure, a device for determining a start-up current threshold of a power factor correction module is provided, comprising:

[0029] A setting module, configured to set a start-up current threshold of a power factor correction module of the air conditioner according to a preset light-load current interval, wherein the air conditioner is in a light-load condition;

[0030] An acquisition module, configured to acquire a state parameter of the power factor correction module corresponding to the start-up current threshold;

[0031] a verification module configured to perform light-load start-up verification on the power factor correction module according to the state parameter to determine whether the state parameter satisfies a preset light-load start-up condition;

[0032] The execution module is configured to adjust the start-up current threshold of the power factor correction module when the light load start-up condition is not met, until the state parameter of the power factor correction module corresponding to the adjusted start-up current threshold meets the light load start-up condition.

[0033] According to a third aspect of an embodiment of the present disclosure, there is provided an electronic device, including:

[0034] processor;

[0035] a memory for storing processor-executable instructions;

[0036] Wherein, the processor is configured to:

[0037] When the air conditioner is in a light-load condition, setting a start-up current threshold of the power factor correction module of the air conditioner according to a preset light-load current interval;

[0038] Acquire a state parameter of the power factor correction module corresponding to the start-up current threshold;

[0039] Performing light-load start-up verification on the power factor correction module according to the state parameter to determine whether the state parameter satisfies a preset light-load start-up condition;

[0040] When the light-load startup condition is not met, the startup current threshold of the power factor correction module is adjusted until the state parameter of the power factor correction module corresponding to the adjusted startup current threshold meets the light-load startup condition.

[0041] According to a fourth aspect of an embodiment of the present disclosure, a computer-readable storage medium is provided, on which computer program instructions are stored. When the program instructions are executed by a processor, the steps of the method for determining the start-up current threshold of a power factor correction module provided in the first aspect of the present disclosure are implemented.

[0042] The technical solution provided by the embodiments of the present disclosure may include the following beneficial effects: when the air conditioner is lightly loaded, the present disclosure sets the start-up current threshold of the power factor correction module of the air conditioner, obtains the state parameter of the power correction module corresponding to the start-up current threshold, performs start-up verification on the power factor correction module according to the state parameter to determine whether the state parameter meets the preset light load start-up condition, and when the light load start-up condition is not met, adjusts the start-up current threshold of the power factor until the state parameter corresponding to the adjusted start-up current threshold meets the light load start-up condition. This avoids the power factor correction module being unable to meet the high-frequency operation requirements of the air conditioning system due to an excessively large start-up current threshold, and the power factor correction module being unstable in control and bus voltage fluctuating due to an excessively small start-up current threshold.

[0043] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0045] Figure 1 is a flow chart showing a method for determining a start-up current threshold of a power factor correction module according to an exemplary embodiment;

[0046] Figure 2is another flow chart showing a method for determining a start-up current threshold of a power factor correction module according to an exemplary embodiment;

[0047] Figure 3 is a block diagram of a device for determining a start-up current threshold of a power factor correction module according to an exemplary embodiment;

[0048] Figure 4 It is a block diagram of an electronic device according to an exemplary embodiment. DETAILED DESCRIPTION

[0049] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0050] It should be noted that in the present disclosure, the terms "S101", "S102" and the like in the specification, claims and drawings are used to distinguish steps, and do not necessarily mean that the method steps are performed in a specific order or sequential sequence.

[0051] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0052] As mentioned in the background technology, when the air conditioner is under light load conditions, there is a high frequency and low current situation. If the set start-up current threshold of the power factor correction module is too large, the power factor correction module of the air conditioner will not be able to meet the high-frequency operation requirements of the air-conditioning system. If the set start-up current threshold of the power factor correction module is too small, the control of the power factor correction module of the air conditioner will be unstable and the bus voltage of the power factor correction module will fluctuate.

[0053] In view of this, the present disclosure provides a method and device for determining the start-up current of a power factor correction module. By adjusting the start-up current threshold of the power factor, it is avoided that the power factor correction module of the air conditioner cannot meet the high-frequency operation requirements of the air-conditioning system due to the start-up current threshold being too large, and it is also avoided that the power factor correction module of the air conditioner is unstable in control due to the start-up current threshold being too small.

[0054] Figure 1 is a flow chart showing a method for determining a current threshold for starting a power factor correction module according to an exemplary embodiment. Figure 1 As shown, the process includes the following steps.

[0055] In step S101, when the air conditioner is in a light-load condition, a start-up current threshold of a power factor correction module of the air conditioner is set according to a preset light-load current interval.

[0056] In step S102, the state parameter of the power factor correction module corresponding to the start-up current threshold is obtained.

[0057] In step S103, a light-load start-up verification is performed on the power factor correction module according to the state parameter to determine whether the state parameter satisfies a preset light-load start-up condition.

[0058] In step S104, when the light load start-up condition is not met, the start-up current threshold of the power factor correction module is adjusted until the state parameter of the power factor correction module corresponding to the adjusted start-up current threshold meets the light load start-up condition.

[0059] The present invention sets the start-up current threshold of the power factor correction module of the air conditioner when the air conditioner is lightly loaded, obtains the state parameter of the power correction module corresponding to the start-up current threshold, and performs start-up verification on the power factor correction module according to the state parameter to determine whether the state parameter meets the preset light-load start-up condition. When the light-load start-up condition is not met, the start-up current threshold of the power factor is adjusted until the state parameter corresponding to the adjusted start-up current threshold meets the light-load start-up condition. This avoids the power factor correction module being unable to meet the high-frequency operation requirements of the air-conditioning system due to an excessively large start-up current threshold, and the power factor correction module being unstable and the bus voltage fluctuating due to an excessively small start-up current threshold. The present invention does not require additional hardware and is not limited by the type of air conditioner. It can be used to determine the start-up power threshold of the power factor correction module of all air conditioners under light load, and has strong versatility.

[0060] In order to enable those skilled in the art to better understand the method for determining the start-up current threshold of the power factor correction module provided by the present disclosure, the above steps are described in detail with examples below.

[0061] In one embodiment, in step S102, the state parameter of the power factor correction module corresponding to the start-up current threshold is obtained, including:

[0062] Adjusting the frequency of the air conditioner so that the power factor correction module is turned on when the current of the power factor correction module is greater than the turn-on current threshold;

[0063] The current waveform and the minimum bus voltage of the power factor correction module within a preset time after the power factor correction module is turned on are obtained, and the state parameters include the current waveform and the minimum bus voltage.

[0064] Among them, the preset duration can be preset according to the actual operation duration of the power factor correction module under the light load condition of the air conditioner, and the present disclosure does not make specific limitations on this.

[0065] For example, when the air conditioner is in a light load condition, the start-up current threshold of the power factor correction module of the air conditioner is set to 0.3A, and the frequency of the air conditioner is adjusted to turn on the power factor correction module when the current of the power factor correction module is greater than 0.3A. The current waveform of the power factor correction module and the minimum bus voltage are obtained within 3 seconds after the power factor correction module is turned on.

[0066] The present invention obtains the current waveform and minimum bus voltage of the power factor correction module corresponding to the set start-up current threshold, and performs light-load start-up verification on the power factor correction module through the current waveform and the minimum bus voltage, thereby determining the start-up current threshold of the power factor correction module, thereby improving the working state reliability and stability of the power factor correction module when the air conditioner is in light-load conditions, and avoiding the situation where the power factor correction module cannot meet the operation requirements of the air-conditioning system when the air conditioner is in light-load conditions.

[0067] In one embodiment, in step S103, light load start verification is performed on the power factor correction module according to the state parameter to determine whether the state parameter meets a preset light load start condition, including:

[0068] Determine whether the current waveform has fluctuations and distortions and whether the minimum bus voltage is greater than the difference between a preset start-up bus voltage and a preset fluctuation bus voltage threshold;

[0069] When there is no fluctuation and distortion in the waveform of the current and the minimum bus voltage is greater than the difference between the preset start-up bus voltage and the preset fluctuating bus voltage threshold, it is determined that the power factor correction module meets the light load start-up condition.

[0070] Among them, the preset start-up bus voltage can be preset according to the bus voltage within a preset time after the power factor correction module of the air conditioner light load condition is turned on, and the preset fluctuating bus voltage threshold can be preset according to the bus voltage fluctuation value during the operation of the power factor correction module of the air conditioner light load condition. In the present disclosure, the preset start-up bus voltage is taken as 380V, and the preset fluctuating bus voltage threshold is taken as 20V.

[0071] For example, the preset start-up bus voltage is taken as 380V, and the preset fluctuating bus voltage threshold is 20V to determine whether there is fluctuation and distortion in the current waveform and whether the minimum bus voltage is greater than 360V; when the current waveform does not fluctuate and distort and the minimum bus voltage is greater than 360V, it is determined that the power factor correction module meets the light load start-up conditions.

[0072] The present disclosure implements light-load start-up verification of the power factor module by judging whether there is fluctuation and distortion in the current waveform and whether the minimum bus voltage is greater than the fluctuation margin, thereby avoiding setting the start-up current threshold of the power factor module to be too large or too small.

[0073] In one embodiment, in step S104, when the light load start condition is not met, the start current threshold of the power factor correction module is adjusted until the state parameter of the power factor correction module corresponding to the adjusted start current threshold meets the light load start condition, including:

[0074] When the light load start-up condition is not met, starting from the light load current lower limit value of the preset light load current interval, the value of the preset start-up current threshold is increased according to the preset increase amount until the state parameter of the power factor correction module corresponding to the adjusted start-up current threshold meets the light load start-up condition, or until the preset start-up current threshold increases to the light load current upper limit value of the preset current interval.

[0075] Among them, the preset light-load current range is preset by the upper and lower current limits corresponding to the light-load condition of the air-conditioning system. In the present disclosure, the preset light-load current range is [0.3A, 1.5A]. The preset increase amount can be preset according to the verification accuracy of the startup verification. In the present disclosure, the preset increase amount is 0.2A.

[0076] For example, when the air conditioner is in a light load condition, the start-up current threshold of the power factor correction module of the air conditioner is set to 0.3A. When the light load start-up condition is not met, the start-up current threshold of 0.3A is increased by 0.2A starting from the lower limit value 0.3A of the preset light load current interval [0.3A, 1.5A] until the current waveform of the power factor correction module corresponding to the start-up current threshold of 0.5A does not fluctuate or distort and the minimum bus voltage is greater than 360V, or until the corresponding start-up current threshold is increased to 1.5A.

[0077] The present invention performs light-load startup verification on the power factor correction module through the current waveform and the minimum bus voltage, thereby determining the startup current threshold of the power factor correction module, thereby improving the working state reliability and stability of the power factor correction module when the air conditioner is in light-load conditions, and avoiding the situation where the power factor correction module cannot meet the operating requirements of the air conditioning system when the air conditioner is in light-load conditions.

[0078] In one embodiment, in step S101, when the air conditioner is in a light load condition, setting a start current threshold of a power factor correction module of the air conditioner according to a preset light load current interval includes:

[0079] When the air conditioner is in a light-load condition, the start-up current threshold of the power factor correction module of the air conditioner is set to the light-load current lower limit value of the preset light-load current interval.

[0080] The present invention sets the start-up current threshold of the power factor correction module of the air conditioner to the light-load current lower limit value of a preset light-load current interval when the air conditioner is in a light-load operating condition, obtains the current waveform and the minimum bus voltage of the power factor correction module corresponding to the start-up current threshold, and then performs light-load start-up verification on the power factor correction module according to the current waveform and the minimum bus voltage, thereby shortening the verification time of the start-up current threshold of the power factor correction module within the preset light-load current interval and improving the efficiency of determining the start-up current threshold of the power factor correction module.

[0081] In one embodiment, the current and bus voltage of the power factor correction module are obtained in the following manner:

[0082] When the air conditioner is in a light-load condition, the initial current of the power factor correction module and the initial bus voltage corresponding to the initial current are obtained multiple times to obtain a preset number of initial currents and initial bus voltages;

[0083] Determine a first average value of the preset number of initial currents, and use the first average value as the current of the power factor correction module;

[0084] Determine a second average value of the preset number of initial bus voltages, and use the second average value as the bus voltage of the power factor correction module;

[0085] The current and the bus voltage are used as state parameters of the power factor correction module.

[0086] Among them, the preset number can be preset according to the verification accuracy of the light-load start-up verification of the power factor correction module, and the preset number in the present disclosure is 64.

[0087] For example, the initial current value of the power factor correction module is obtained multiple times to obtain 64 initial currents and the initial bus voltages corresponding to the initial currents. The average of the 64 initial currents is calculated and used as the current of the power factor correction module. The average of the 64 initial bus voltages is calculated and used as the bus voltage of the power factor correction module.

[0088] The present invention uses the average of the initial current sampled multiple times and the bus voltage corresponding to the initial current as the state parameter of the power factor correction module, which improves the accuracy of the sampling result and ensures the reliability of the verification result.

[0089] In one embodiment, obtaining an initial current of a power factor correction module and an initial bus voltage corresponding to the initial current includes:

[0090] Acquire a current signal of the power factor correction module and a bus voltage signal corresponding to the current signal;

[0091] The current signal and the bus voltage signal are respectively subjected to deep filtering and analog-to-digital conversion processing to obtain an initial current of the power factor correction module and an initial bus voltage corresponding to the initial current.

[0092] The filtering depth of the deep filtering may be determined according to the control data actually required by the air-conditioning system for the power factor correction module, and the present disclosure does not make any specific limitation on this.

[0093] The present disclosure can avoid the interference of harmonics in the line on the acquired current signal and bus voltage signal by performing deep filtering on the current signal and the bus voltage signal, and can convert the current signal and the bus voltage signal in the line from analog signals to digital signals by performing analog-to-digital conversion processing on the current signal and the bus voltage signal, thereby obtaining the initial current and initial bus voltage of the power form correction module to facilitate subsequent switch verification.

[0094] Figure 2 is another flow chart of a method for determining a current threshold for starting a power factor correction module according to an exemplary embodiment. Figure 2 , the method comprising:

[0095] In step S201, a current signal of a power factor correction module and a bus voltage signal corresponding to the current signal are obtained multiple times.

[0096] In step S202, metal depth filtering and mode conversion processing are performed on the current signal and the bus voltage signal respectively to obtain a preset number of initial currents and initial bus voltages of the power factor correction module.

[0097] In step S203, a first mean value of a preset number of initial currents is determined and used as the current of the power factor correction module; a second mean value of a preset number of initial bus voltages is determined and used as the bus voltage of the power factor correction module.

[0098] Specifically, the initial current value of the power factor correction module is obtained multiple times to obtain 64 initial currents and the initial bus voltages corresponding to the initial currents, the average of the 64 initial currents is calculated, and the average is used as the current of the power factor correction module, the average of the 64 initial bus voltages is calculated, and the average is used as the bus voltage of the power factor correction module.

[0099] In step S204, when the air conditioner is in a light-load condition, a start-up current threshold of a power factor correction module of the air conditioner is set according to a preset light-load current interval.

[0100] Specifically, when the air conditioner is in a light load condition, the start-up current threshold of the power factor correction module of the air conditioner is set to the light load current lower limit value 0.3A of the preset light load current interval according to the preset light load current interval [0.3A, 1.5A].

[0101] In step S205, the state parameter of the power factor correction module corresponding to the start-up current threshold is obtained.

[0102] Specifically, the frequency of the air conditioner is adjusted to turn on the power factor correction module when the current of the power factor correction module is greater than 0.3A, and the current waveform of the power factor correction module and the minimum bus voltage are obtained within 3 seconds after the power factor correction module is turned on.

[0103] In step S206, a light-load start-up verification is performed on the power factor correction module according to the state parameter.

[0104] Specifically, the preset start-up bus voltage is taken as 380V, and the preset fluctuating bus voltage threshold is taken as 20V to determine whether there is fluctuation and distortion in the current waveform and whether the minimum bus voltage is greater than 360V; when there is no fluctuation and distortion in the current waveform and the minimum bus voltage is greater than 360V, it is determined that the power factor correction module meets the light load start-up conditions.

[0105] In step S207, when the state parameter satisfies the preset light-load start condition, it is determined that the start-up current threshold is the start-up current threshold of the power factor correction module.

[0106] In step S208, when the light load start-up condition is not met, the start-up current threshold of the power factor correction module is adjusted until the state parameter of the power factor correction module corresponding to the adjusted start-up current threshold meets the light load start-up condition.

[0107] Specifically, when the light load start-up condition is not met, starting from the lower limit value 0.3A of the preset light load current interval [0.3A, 1.5A], the start-up current threshold of 0.3A is increased by 0.2A until the current waveform of the power factor correction module corresponding to the start-up current threshold of 0.5A does not fluctuate or distort and the minimum bus voltage is greater than 360V, or until the corresponding start-up current threshold is increased to 1.5A.

[0108] Based on the same inventive concept, the present disclosure further provides a device 300 for determining a start-up current threshold of a power factor correction module. The device 300 includes a setting module 310 , an acquisition module 320 , a verification module 330 and an execution module 340 .

[0109] The setting module 310 is configured to set a start-up current threshold of a power factor correction module of the air conditioner according to a preset light-load current interval, wherein the air conditioner is in a light-load condition.

[0110] The acquisition module 320 is configured to acquire a state parameter of the power factor correction module corresponding to the start-up current threshold.

[0111] The verification module 330 is configured to perform light-load start-up verification on the power factor correction module according to the state parameter to determine whether the state parameter satisfies a preset light-load start-up condition.

[0112] The execution module 340 is configured to adjust the start-up current threshold of the power factor correction module until the state parameter of the power factor correction module corresponding to the adjusted start-up current threshold satisfies the light-load start-up condition.

[0113] The present invention sets the start-up current threshold of the power factor correction module of the air conditioner when the air conditioner is lightly loaded, obtains the state parameter of the power correction module corresponding to the start-up current threshold, and performs start-up verification on the power factor correction module according to the state parameter to determine whether the state parameter meets the preset light-load start-up condition. When the light-load start-up condition is not met, the start-up current threshold of the power factor is adjusted until the state parameter corresponding to the adjusted start-up current threshold meets the light-load start-up condition. This avoids the power factor correction module being unable to meet the high-frequency operation requirements of the air-conditioning system due to an excessively large start-up current threshold, and the power factor correction module being unstable and the bus voltage fluctuating due to an excessively small start-up current threshold. The present invention does not require additional hardware and is not limited by the type of air conditioner. It can be used to determine the start-up power threshold of the power factor correction module of all air conditioners under light load, and has strong versatility.

[0114] Further, the acquisition module 320 is configured to adjust the frequency of the air conditioner so that the power factor correction module is turned on when the current of the power factor correction module is greater than the start-up current threshold;

[0115] The current waveform and the minimum bus voltage of the power factor correction module within a preset time after the power factor correction module is turned on are obtained, and the state parameters include the current waveform and the minimum bus voltage.

[0116] Further, the verification module 330 is configured to determine whether the waveform of the current has fluctuations and distortions and whether the minimum bus voltage is greater than the difference between the preset start-up bus voltage and the preset fluctuation bus voltage threshold;

[0117] When there is no fluctuation and distortion in the waveform of the current and the minimum bus voltage is greater than the difference between the preset start-up bus voltage and the preset fluctuating bus voltage threshold, it is determined that the power factor correction module meets the light load start-up condition.

[0118] Furthermore, the execution module 340 is configured to increase the value of the preset start-up current threshold according to a preset increase amount, starting from the light-load current lower limit value of the preset light-load current interval, until the state parameter of the power factor correction module corresponding to the adjusted start-up current threshold satisfies the light-load start-up condition, or until the preset start-up current threshold increases to the light-load current upper limit value of the preset current interval.

[0119] Furthermore, the setting module 310 is configured to set the start-up current threshold of the power factor correction module of the air conditioner to the light-load current lower limit value of the preset light-load current interval, wherein the air conditioner is in a light-load operating condition.

[0120] Further, the acquisition module 320 is further configured to acquire the initial current of the power factor correction module and the initial bus voltage corresponding to the initial current for multiple times, and obtain a preset number of initial currents and initial bus voltages, wherein the air conditioner is in a light load condition;

[0121] Determine a first average value of the preset number of initial currents, and use the first average value as the current of the power factor correction module;

[0122] Determine a second average value of the preset number of initial bus voltages, and use the second average value as the bus voltage of the power factor correction module;

[0123] The current and the bus voltage are used as state parameters of the power factor correction module.

[0124] Furthermore, the acquisition module 320 is also configured to acquire the current signal of the power factor correction module and the bus voltage signal corresponding to the current signal;

[0125] The current signal and the bus voltage signal are respectively subjected to deep filtering and analog-to-digital conversion processing to obtain an initial current of the power factor correction module and an initial bus voltage corresponding to the initial current.

[0126] In addition, it is worth noting that for the convenience and simplicity of description, the embodiments described in the specification are all preferred embodiments, and the parts involved are not necessarily necessary for the present invention. For example, the setting module and the acquisition module can be independent devices or the same device in specific implementation, and the present disclosure does not limit this.

[0127] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0128] The present disclosure also provides a computer-readable storage medium having computer program instructions stored thereon. When the program instructions are executed by a processor, the steps of the method for determining a start-up current threshold of a power factor correction module provided by the present disclosure are implemented.

[0129] Based on the same inventive concept, the present disclosure also provides an electronic device, including:

[0130] processor;

[0131] a memory for storing processor-executable instructions;

[0132] The processor is configured as follows:

[0133] When the air conditioner is in a light-load condition, setting a start-up current threshold of the power factor correction module of the air conditioner according to a preset light-load current interval;

[0134] Obtaining a state parameter of the power factor correction module corresponding to the start-up current threshold;

[0135] Performing light-load start-up verification on the power factor correction module according to the state parameter to determine whether the state parameter meets a preset light-load start-up condition;

[0136] When the light-load start-up condition is not met, the start-up current threshold of the power factor correction module is adjusted until the state parameter of the power factor correction module corresponding to the adjusted start-up current threshold meets the light-load start-up condition.

[0137] Figure 4 8 is a block diagram of an electronic device 800 according to an exemplary embodiment. For example, the electronic device 800 may be a computer, a messaging device, a tablet device, a personal digital assistant, and the like.

[0138] Reference Figure 4 , the electronic device 800 may include one or more of the following components: a processing component 802 , a memory 804 , a power component 806 , a multimedia component 808 , an audio component 810 , an input / output (I / O) interface 812 , a sensor component 814 , and a communication component 816 .

[0139] The processing component 802 generally controls the overall operation of the electronic device 800, such as operations associated with display, phone calls, data communications, camera operations, and recording operations. The processing component 802 may include one or more processors 820 to execute instructions to complete all or part of the steps of the above-mentioned method. In addition, the processing component 802 may include one or more modules to facilitate the interaction between the processing component 802 and other components. For example, the processing component 802 may include a multimedia module to facilitate the interaction between the multimedia component 808 and the processing component 802.

[0140] The memory 804 is configured to store various types of data to support operations on the electronic device 800. Examples of such data include instructions for any application or method operating on the electronic device 800, preset light-load current intervals, currents, bus voltages, current waveforms, minimum bus voltages, etc. The memory 804 may be implemented by any type of volatile or nonvolatile storage device or a combination thereof, such as a static random access memory (SRAM), an electrically erasable programmable read-only memory (EEPROM), an erasable programmable read-only memory (EPROM), a programmable read-only memory (PROM), a read-only memory (ROM), a magnetic memory, a flash memory, a magnetic disk, or an optical disk.

[0141] The power component 806 provides power to the various components of the electronic device 800. The power component 806 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the electronic device 800.

[0142] The multimedia component 808 includes a screen that provides an output interface between the electronic device 800 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundaries of the touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 808 includes a front camera and / or a rear camera. When the electronic device 800 is in an operating mode, such as a shooting mode or a video mode, the front camera and / or the rear camera may receive external multimedia data. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.

[0143] The audio component 810 is configured to output and / or input audio signals. For example, the audio component 810 includes a microphone (MIC), and when the electronic device 800 is in an operating mode, such as a call mode, a recording mode, and a voice recognition mode, the microphone is configured to receive an external audio signal. The received audio signal can be further stored in the memory 804 or sent via the communication component 816. In some embodiments, the audio component 810 also includes a speaker for outputting audio signals.

[0144] I / O interface 812 provides an interface between processing component 802 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include but are not limited to: home button, volume button, start button, and lock button.

[0145] The sensor assembly 814 includes one or more sensors for providing various aspects of status assessment for the electronic device 800. For example, the sensor assembly 814 can detect the open / closed state of the electronic device 800, the relative positioning of the components, such as the display and keypad of the electronic device 800, and the sensor assembly 814 can also detect the position change of the electronic device 800 or a component of the electronic device 800, the presence or absence of contact between the user and the electronic device 800, the orientation or acceleration / deceleration of the electronic device 800, and the temperature change of the electronic device 800. The sensor assembly 814 may include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The sensor assembly 814 may also include an optical sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 814 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

[0146] The communication component 816 is configured to facilitate wired or wireless communication between the electronic device 800 and other devices. The electronic device 800 can access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 816 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 816 also includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.

[0147] In an exemplary embodiment, the electronic device 800 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the above-mentioned method for determining the start-up current threshold of the power factor correction module.

[0148] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 804 including instructions, and the instructions can be executed by a processor 820 of an electronic device 800 to complete the above method of determining the power factor correction module start-up current threshold. For example, the non-transitory computer-readable storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.

[0149] In an exemplary embodiment, the electronic device 800 may be applied to an air conditioner or an air conditioner with an IFD (Intense Field Dielectric, air purification) function.

[0150] In another exemplary embodiment, a computer program product is also provided. The computer program product includes a computer program executable by a programmable device. The computer program has a code portion for executing the above method for determining a start-up current threshold of a power factor correction module when executed by the programmable device.

[0151] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the present disclosure. This application is intended to cover any variations, uses or adaptations of the present disclosure, which follow the general principles of the present disclosure and include common knowledge or customary technical means in the art that are not disclosed in the present disclosure. The specification and examples are to be considered as exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0152] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A method for determining a current threshold for a power factor correction module, characterized in that: include: When the air conditioner is in a light-load condition, setting a start-up current threshold of the power factor correction module of the air conditioner according to a preset light-load current interval; Acquire a state parameter of the power factor correction module corresponding to the start-up current threshold; Performing light-load start-up verification on the power factor correction module according to the state parameter to determine whether the state parameter satisfies a preset light-load start-up condition; When the light-load startup condition is not met, the startup current threshold of the power factor correction module is adjusted until the state parameter of the power factor correction module corresponding to the adjusted startup current threshold meets the light-load startup condition.

2. The method according to claim 1, characterized in that The obtaining of the state parameter of the power factor correction module corresponding to the start-up current threshold comprises: Adjusting the frequency of the air conditioner so that the power factor correction module is turned on when the current of the power factor correction module is greater than the turn-on current threshold; The current waveform and the minimum bus voltage of the power factor correction module are obtained within a preset time after the power factor correction module is turned on, and the state parameters include the current waveform and the minimum bus voltage.

3. The method according to claim 2, characterized in that The performing light load start verification on the power factor correction module according to the state parameter to determine whether the state parameter satisfies a preset light load start condition includes: Determine whether the current waveform has fluctuations and distortions and whether the minimum bus voltage is greater than the difference between a preset start-up bus voltage and a preset fluctuating bus voltage threshold; When there is no fluctuation and distortion in the waveform of the current and the minimum bus voltage is greater than the difference between the preset start-up bus voltage and the preset fluctuating bus voltage threshold, it is determined that the power factor correction module meets the light load start-up condition.

4. The method according to claim 1, characterized in that: When the light load start-up condition is not met, adjusting the start-up current threshold of the power factor correction module until the state parameter of the power factor correction module corresponding to the adjusted start-up current threshold meets the light load start-up condition, including: When the light load start-up condition is not met, starting from the light load current lower limit value of the preset light load current interval, the value of the start-up current threshold is increased according to a preset increase amount until the state parameter of the power factor correction module corresponding to the adjusted start-up current threshold meets the light load start-up condition, or until the start-up current threshold increases to the light load current upper limit value of the preset light load current interval.

5. The method according to claim 1, characterized in that When the air conditioner is in a light load condition, setting a start current threshold of the power factor correction module of the air conditioner according to a preset light load current interval includes: When the air conditioner is in a light-load condition, the start-up current threshold of the power factor correction module of the air conditioner is set to the light-load current lower limit value of the preset light-load current interval.

6. The method according to claim 1, characterized in that The current and bus voltage of the power factor correction module are obtained in the following manner: When the air conditioner is in a light-load condition, the initial current of the power factor correction module and the initial bus voltage corresponding to the initial current are obtained multiple times to obtain a preset number of initial currents and initial bus voltages; Determine a first average value of the preset number of initial currents, and use the first average value as the current of the power factor correction module; Determine a second average value of the preset number of initial bus voltages, and use the second average value as the bus voltage of the power factor correction module; The current and the bus voltage are used as state parameters of the power factor correction module.

7. The method according to claim 6, characterized in that The obtaining of the initial current of the power factor correction module and the initial bus voltage corresponding to the initial current includes: Acquire a current signal of the power factor correction module and a bus voltage signal corresponding to the current signal; The current signal and the bus voltage signal are respectively subjected to deep filtering and analog-to-digital conversion processing to obtain an initial current of the power factor correction module and an initial bus voltage corresponding to the initial current.

8. A device for determining a current threshold for a power factor correction module, characterized in that: include: A setting module, configured to set a start-up current threshold of a power factor correction module of the air conditioner according to a preset light-load current interval, wherein the air conditioner is in a light-load condition; An acquisition module, configured to acquire a state parameter of the power factor correction module corresponding to the start-up current threshold; a verification module configured to perform light-load start-up verification on the power factor correction module according to the state parameter to determine whether the state parameter satisfies a preset light-load start-up condition; The execution module is configured to adjust the start-up current threshold of the power factor correction module when the light load start-up condition is not met, until the state parameter of the power factor correction module corresponding to the adjusted start-up current threshold meets the light load start-up condition.

9. An electronic device, characterized in that: include: processor; a memory for storing processor-executable instructions; Wherein, the processor is configured to: When the air conditioner is in a light-load condition, setting a start-up current threshold of the power factor correction module of the air conditioner according to a preset light-load current interval; Acquire a state parameter of the power factor correction module corresponding to the start-up current threshold; Performing light-load start-up verification on the power factor correction module according to the state parameter to determine whether the state parameter satisfies a preset light-load start-up condition; When the light-load startup condition is not met, the startup current threshold of the power factor correction module is adjusted until the state parameter of the power factor correction module corresponding to the adjusted startup current threshold meets the light-load startup condition.

10. A computer-readable storage medium having computer program instructions stored thereon, characterized in that: When the computer program instructions are executed by a processor, the steps of the method described in any one of claims 1 to 7 are implemented.

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