Control method of compressor and air conditioner

Abstract

The embodiment of the present application provides a kind of compressor control method and air conditioner, and the compressor control method includes: in response to detecting that at least three phase lines supply power to the compressor, then determine the line voltage between each line;According to each line voltage, determine the power supply state;If the power supply state is power supply abnormality, then according to each line voltage, adjust the upper limit frequency of the compressor, obtain target frequency;Based on the target frequency, control the compressor to run.In the detection of the power supply abnormality of compressor, the upper limit frequency of the compressor is adjusted to target frequency, which can reduce the damage caused by the operation of compressor when power supply is abnormal, thereby improving the safety and reliability of compressor.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of intelligent control of air conditioners, and particularly relates to a control method of a compressor and an air conditioner. BACKGROUND

[0002] The air conditioner outdoor unit has a three-phase power supply model. The three-phase power supply air conditioner has significant advantages in power, voltage stability, energy saving effect, and maintenance difficulty, and is suitable for large areas and high power demand places.

[0003] However, the power supply may be abnormal during use of the machine. At this time, the alternating current is too large, which may affect the reliability of the air conditioner compressor. SUMMARY

[0004] The application provides a control method of a compressor and an air conditioner, which can adjust the operating parameters of the compressor when the power supply is abnormal, thereby improving the reliability of the compressor.

[0005] In a first aspect, the application provides a control method of a compressor, comprising:

[0006] In response to detecting that at least three lines supply power to the compressor, the line voltages between the lines are determined;

[0007] The power supply state is determined according to the line voltages;

[0008] If the power supply state is a power supply abnormality, the upper limit frequency of the compressor is adjusted according to the line voltages to obtain a target frequency;

[0009] The compressor is controlled to operate based on the target frequency.

[0010] Optionally, the power supply state is determined according to the line voltages, comprising:

[0011] The voltage difference between the line voltages is calculated;

[0012] The power supply state is determined according to the voltage difference and a voltage difference threshold.

[0013] Optionally, the power supply state is determined according to the voltage difference and a voltage difference threshold, comprising:

[0014] If the voltage difference is greater than or equal to the voltage difference threshold, the power supply abnormality is taken as the power supply state;

[0015] If the voltage difference is less than the voltage difference threshold, the power supply normality is taken as the power supply state.

[0016] Optionally, if the power supply state is a power supply abnormality, the upper limit frequency of the compressor is adjusted according to the line voltages to obtain a target frequency, comprising:

[0017] If the power supply state is a power supply abnormality, a frequency adjustment offset value is determined according to a preset strategy based on the line voltages.

[0018] The upper limit frequency of the compressor is adjusted according to the frequency adjustment offset value to obtain a target frequency.

[0019] Optionally, if the power supply state is a power supply abnormality, a frequency adjustment offset value is determined according to a preset strategy based on the line voltages, comprising:

[0020] If the power supply state is a power supply abnormality, an adjustment coefficient is determined based on a voltage difference of the line voltages, a voltage difference threshold value, and a voltage difference protection threshold value, wherein the voltage difference protection threshold value is greater than the voltage difference threshold value.

[0021] The frequency adjustment offset value is determined according to the adjustment coefficient and a preset correction frequency.

[0022] Optionally, if the power supply state is a power supply abnormality, an adjustment coefficient is determined based on a voltage difference of the line voltages, a voltage difference threshold value, and a voltage difference protection threshold value, wherein the voltage difference protection threshold value is greater than the voltage difference threshold value, comprising:

[0023] A first difference value is obtained based on a difference between the voltage difference protection threshold value and the voltage difference threshold value.

[0024] A second difference value is obtained based on a difference between the voltage difference and the voltage difference threshold value.

[0025] The adjustment coefficient is obtained according to a quotient of the second difference value and the first difference value.

[0026] Optionally, after the target frequency is used to control the operation of the compressor, the control method further comprises:

[0027] The line voltages between the lines are updated according to a preset sampling period.

[0028] In each sampling period, the target frequency is updated based on the updated line voltages, and the compressor is controlled to operate based on the updated target frequency.

[0029] Optionally, the control method further comprises:

[0030] If the power supply state is a power supply failure, the compressor is controlled to stop.

[0031] Optionally, after the compressor is stopped for protection when the power supply state is a power supply fault, the control method further comprises:

[0032] When the voltage difference between the line voltages is detected to be less than a preset voltage difference safety threshold, and the compressor is stopped for a preset length of time, the compressor is restarted.

[0033] In a second aspect, the embodiments of the present application further provide an air conditioner, comprising:

[0034] a compressor;

[0035] a processor, electrically connected to the compressor, configured to execute the control method of the compressor according to any one of the preceding aspects.

[0036] In the control method of the compressor and the air conditioner, when the power supply of the compressor is detected to be abnormal, the upper limit frequency of the compressor is adjusted to a target frequency, which can reduce the damage to the compressor caused by the operation of the compressor when the power supply is abnormal, thereby improving the safety and reliability of the compressor. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0038] In order to more completely understand the present application and its beneficial effects, the following will be described with reference to the drawings. In the following description, the same reference numerals represent the same parts.

[0039] Figure 1 The first flowchart of the control method of the compressor provided by the embodiments of the present application.

[0040] Figure 2 The structural block diagram of the power supply state detection circuit provided by the embodiments of the present application.

[0041] Figure 3 The second flowchart of the control method of the compressor provided by the embodiments of the present application.

[0042] Figure 4 The third flowchart of the control method of the compressor provided by the embodiments of the present application.

[0043] Figure 5 The fourth flowchart of the control method of the compressor provided by the embodiments of the present application.

[0044] Figure 6A structural block diagram of a control device of a compressor provided in an embodiment of the present application is shown.

[0045] Figure 7 A structural block diagram of an air conditioner provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0047] The outdoor unit of an air conditioner uses three-phase power supply. During use, the machine may have power supply abnormality caused by various reasons, such as power supply open-phase or power supply imbalance. Therefore, when the AC input voltage is open-phase or unbalanced, the AC current will be too large, which will affect the reliability of the compressor of the air conditioner.

[0048] In order to reduce the damage to the compressor under the power supply abnormality in the air conditioner, thereby improving the safety and stability of the compressor, the embodiments of the present application provide a control method of a compressor and an air conditioner, which will be described below with reference to the drawings.

[0049] Please refer to Figure 1 shown, Figure 1 A first flowchart of a control method of a compressor provided in an embodiment of the present application is shown. The control method of the compressor provided in the embodiments of the present application includes:

[0050] In step S110, in response to detecting that at least three-phase lines supply power to the compressor, the line voltages between the lines are determined.

[0051] The compressor plays a role of driving refrigerant in a refrigeration system. For an air conditioner, the compressor is generally installed in an outdoor unit. The air conditioner compressor extracts refrigerant from a low-pressure area, sends it to a high-pressure area after compression, cools and condenses it, releases heat to the air through the heat sink, and the refrigerant also changes from gas to liquid, and the pressure increases.

[0052] As a high-power electrical equipment, if a single-phase power supply is used, the risk of current overload is relatively large, which may cause damage to the equipment. Moreover, because three-phase power supply equipment has significant advantages in power, voltage stability, energy saving effect, and maintenance difficulty, etc., more and more air conditioners use three-phase power supply. Three-phase power is a power transmission method composed of three phases of AC power with a phase difference of 120 degrees. The embodiments of the present application take three-phase power supply as an example for description, but should not be understood as a limitation on the number of power supply lines.

[0053] However, machines such as air conditioners may experience power supply abnormalities during use, such as phase loss or power imbalance. In these cases, excessive AC current can affect the reliability of the air conditioner compressor. Phase loss refers to one phase in a three-phase circuit failing to operate, or the absence of a live wire. Power imbalance can be understood as a voltage deviation significantly from normal values. Both phase loss and power imbalance will affect the compressor's operation; therefore, it is necessary to check whether the compressor's power supply is experiencing phase loss or power imbalance.

[0054] Since a three-phase power supply is used, and the loss of a phase and imbalance of the power supply can be determined by the voltage of the three-phase line, when at least three-phase lines are detected to be supplying power to the compressor, the line voltage between each line can be determined, and the power supply status can be determined by the line voltage.

[0055] Step S120: Determine the power supply status based on the voltage of each line.

[0056] The power supply status can be normal or abnormal. The normal state is the normal power supply state without phase loss and without power imbalance; the abnormal state is the state where the voltage is abnormal due to phase loss or power imbalance.

[0057] The power supply status can be determined based on the line voltages, such as by determining the power supply status based on the voltage difference and voltage difference threshold between the line voltages.

[0058] It should be noted that, for ease of understanding, the following embodiments will be illustrated using a three-phase power supply line to power the compressor, and should not be construed as a limitation on the power supply line.

[0059] For example, such as Figure 2 As shown, Figure 2 This is a structural block diagram of the power supply status detection circuit provided in an embodiment of this application. The three-phase power supply line to the compressor includes a first phase line T, a second phase line R, and a third phase line S, which are three live wires. For example, the three-phase power R, S, and T can be connected to a filter circuit module to filter the three-phase power, removing noise and other noise from the circuit, resulting in filtered three-phase power T1, R1, and S1.

[0060] Calculate the line voltages between each line, such as the first line voltage U between the first phase line T and the second phase line R. RT The second line voltage U between the first phase line T and the third phase line S ST The third line voltage U between the second phase line R and the third phase line S RS .

[0061] It should be noted that only two line voltages in the three-phase power need to be detected, and the voltage of each phase line does not need to be detected, so the detection of the three phase lines is covered, and if there is an open phase or power imbalance, at least one of the first line voltage U RT and the second line voltage U ST can be derived. The circuit structure can be simplified, and the detection accuracy can be improved.

[0062] For example, the line voltage can be obtained by a differential sampling circuit module. For example, the filtered first phase line T1 and the second phase line R1 are connected to a differential sampling circuit module, and the first line voltage U RT can be output; the filtered first phase line T1 and the third phase line S1 are connected to another differential sampling circuit module, and the second line voltage U ST can be output. Of course, there are other ways to obtain the first line voltage U RT and the second line voltage U ST , which are only examples and should not be construed as a limitation on the manner in which the first line voltage U RT and the second line voltage U ST are obtained.

[0063] Referring to Figure 3 , a second flowchart of the control method of the compressor provided by the embodiment is shown. Figure 3 In an implementation, step S120 includes:

[0064] Step S121, calculating the voltage difference between the line voltages.

[0065] Step S122, determining the power supply state according to the voltage difference and the voltage difference threshold.

[0066] After obtaining the first line voltage U RT and the second line voltage U ST , the voltage difference between the first line voltage U RT and the second line voltage U ST is calculated, and the voltage difference can be positive to facilitate subsequent calculation. Comparing the voltage difference with the voltage difference threshold can determine the power supply state.

[0067] Since the error range of a single line voltage can be large, using it as a basis for judgment can result in low accuracy, therefore, the embodiment uses the voltage difference between the line voltages as a basis for judgment. The embodiment uses the difference between the line voltages to determine the power supply state, which can improve the accuracy of the power supply state determination compared to using only the line voltage.

[0068] Referring to Figure 4 ,Figure 4 A third flowchart of the control method of the compressor is provided for the embodiments of the present application. In an implementation, step S122 comprises:

[0069] Step S1220, if the voltage difference is greater than or equal to the voltage difference threshold, the power supply is abnormal as the power supply state.

[0070] Step S1222, if the voltage difference is less than the voltage difference threshold, the power supply is normal as the power supply state.

[0071] The voltage difference of the normal two-wire voltage fluctuates very little, within 60V. Therefore, the voltage difference threshold can be 60V. If the voltage difference is greater than or equal to 60V, the power supply is abnormal as the power supply state; if the voltage difference is less than 60V, the power supply is normal as the power supply state.

[0072] Step S130, if the power supply state is power supply abnormal, adjusting the upper limit frequency of the compressor according to the line voltages to obtain a target frequency.

[0073] In the case where the power supply state is power supply abnormal, if the compressor still operates at the frequency when the power supply is normal, it will cause the service life of the compressor to drop sharply, affecting the safety and reliability of the compressor. Therefore, when detecting that the power supply of the compressor is abnormal, after adjusting the upper limit frequency of the compressor according to the line voltages to obtain a target frequency, the compressor is controlled to operate at the target frequency, or in other words, the upper limit frequency of the compressor is adjusted to the target frequency, so as to reduce the damage to the compressor, thereby improving the safety and reliability of the compressor.

[0074] In an implementation, step S130 comprises:

[0075] Step S131, if the power supply state is power supply abnormal, determining a frequency adjustment offset value based on the line voltages according to a preset strategy.

[0076] The preset strategy can be understood as the calculation method of the adjustment offset value. In an implementation, step S131 comprises:

[0077] Step S1310, if the power supply state is power supply abnormal, determining an adjustment coefficient based on the voltage difference of the line voltages, the voltage difference threshold and a voltage difference protection threshold, wherein the voltage difference protection threshold is greater than the voltage difference threshold.

[0078] Step S1312, determining the frequency adjustment offset value according to the adjustment coefficient and a preset correction frequency.

[0079] For the voltage difference threshold and the voltage difference protection threshold: the voltage difference fluctuation of normal two-wire voltage is small, within 60V. When the voltage difference is greater than 100V, it indicates that there is a serious imbalance of input voltage. Therefore, the voltage difference threshold can be 60V, and the voltage difference protection threshold can be 100V.

[0080] When the voltage difference is in the range of 60V to 100V, although the power supply is abnormal, it does not reach the extent of failure, therefore, when the voltage difference is in the range of 60V to 100V, the frequency of the compressor can be corrected to improve the safety and reliability of the compressor.

[0081] In an implementation, the step S1310 comprises:

[0082] Based on the difference between the voltage difference protection threshold and the voltage difference threshold, a first difference value is obtained;

[0083] Based on the difference between the voltage difference and the voltage difference threshold, a second difference value is obtained;

[0084] According to the quotient of the second difference value and the first difference value, an adjustment coefficient is obtained.

[0085] The determination of the adjustment coefficient is according to the voltage difference ΔU of each line voltage, the voltage difference threshold U1 and the voltage difference protection threshold U2. Exemplarily, based on the difference between the voltage difference protection threshold U2 and the voltage difference threshold U1, a first difference value K1 is obtained, based on the difference between the voltage difference ΔU and the voltage difference threshold U1, a second difference value K2 is obtained, and according to the quotient of the second difference value K2 and the first difference value K1, an adjustment coefficient M is obtained.

[0086] The calculation formula of the adjustment coefficient M is:

[0087]

[0088] It can be understood that the adjustment coefficient M can be understood as the proportion of the deviation of the voltage difference ΔU and the voltage difference threshold U1 in the entire preset threshold range, and the preset threshold range is the range of the voltage difference threshold U1 to the voltage difference protection threshold U2. Among them, the greater the voltage difference ΔU, the greater the adjustment coefficient M.

[0089] The preset correction frequency F0 is also set in order to reduce damage to the compressor in the case of a missing phase of the power supply. The preset correction frequency F0 is inversely related to the displacement of the compressor, which refers to the volume of fluid suctioned or discharged per stroke or per cycle. For a compressor with large displacement, the current is also high, and the corresponding frequency is also large. In order to ensure the comfort of the air conditioner, the preset correction frequency F0 can be set to be small. Correspondingly, for a compressor with small displacement, the current is small, and the corresponding frequency is also small. Therefore, the preset correction frequency F0 can be set to be large. In addition, the setting of the preset correction frequency F0 also needs to consider the comfort of the air conditioner, and is comprehensively considered according to the displacement of the compressor and the comfort of the air conditioner. If a missing phase of the power supply occurs, the frequency of the compressor is greatly reduced, although it can ensure that the processor is not damaged, such as burning out, but the air conditioner at this time is also in an abnormal state, reducing the comfort of the user using the air conditioner. For example, the preset correction frequency F0 can be 30 Hz.

[0090] The frequency adjustment offset value ΔF is obtained according to the preset correction frequency F0 and the adjustment coefficient M. For example, the frequency adjustment offset value ΔF can be the product of the preset correction frequency F0 and the adjustment coefficient M, that is, ΔF = F0 * M.

[0091] The adjustment coefficient M is at most 1, that is, when the voltage difference ΔU reaches 100V, the linear maximum correction is the preset correction frequency F0.

[0092] In step S132, the upper limit frequency of the compressor is adjusted according to the frequency adjustment offset value, to obtain a target frequency.

[0093] The upper limit frequency F1 of the compressor is also the highest frequency allowed for the compressor to run in different working modes of the air conditioner. The air conditioner has different working modes corresponding to different external environment temperatures. The working modes are, for example, conventional refrigeration, rapid refrigeration, refrigeration mode, and heating mode. For example, the upper limit frequencies are different in the conventional refrigeration and rapid refrigeration, and the upper limit frequencies are different in the refrigeration mode and the heating mode. It can be understood that the upper limit frequency F1 of the compressor running in the set working mode is obtained at this time.

[0094] The target frequency Fd is also the highest frequency allowed for the compressor to run in the case of a missing phase or power imbalance.

[0095] The upper limit frequency F1 of the compressor is adjusted according to the frequency adjustment offset value ΔF, to obtain the target frequency Fd, such as Fd = F1 - ΔF.

[0096] It should be noted that when the upper limit frequency F1 is lower than the difference between the highest upper limit frequency point in the working mode of the air conditioner and the frequency adjustment offset value ΔF, no frequency correction is performed. The working mode is such as the refrigeration mode and the heating mode, and for example, the highest upper limit frequency point in the refrigeration mode can be the refrigeration frequency, and the highest upper limit frequency point in the heating mode can be the heating frequency. When the upper limit frequency F1 is lower than the difference between the refrigeration frequency and the frequency adjustment offset value ΔF, or lower than the difference between the heating frequency and the frequency adjustment offset value ΔF, that is, the upper limit frequency at this time is not high, that is, the compressor can work at this frequency, and therefore there is no need to adjust the frequency.

[0097] In some embodiments, the control method of the compressor further comprises that the frequency adjustment offset value ΔF is updated every preset time interval to avoid the fluctuation of the corrected frequency affecting the comfort of the air conditioner. The preset time interval can be, for example, 5 minutes, of course, which is not limited here.

[0098] Step S140, controlling the compressor to operate based on the target frequency.

[0099] Because the voltage value of the power supply deviates from the normal value, if the working frequency of the compressor when the voltage of the power supply is normal is used, problems such as compressor jamming are prone to occur, and the compressor is prone to be damaged.

[0100] Therefore, the embodiment of the present application controls the compressor to operate based on the target frequency after frequency correction, which can reduce the risk of compressor loss, and further improve the safety and reliability of the compressor.

[0101] Please refer to Figure 5 shown, Figure 5 The fourth flowchart of the control method of the compressor provided by the embodiment of the present application is shown.

[0102] Step S150, updating the line voltage between each line according to a preset sampling period.

[0103] Step S160, updating the target frequency based on the updated line voltage in each sampling period, and controlling the compressor to operate based on the updated target frequency.

[0104] Because the power supply uses alternating current, in order to avoid the fluctuation of the target frequency obtained after correction affecting the comfort of the air conditioner, the target frequency can be refreshed or updated.

[0105] For example, the preset sampling period can be 5 minutes, that is, the line voltage between each line is updated every 5 minutes, and the target frequency is updated based on the updated line voltage in each sampling period, and the compressor is controlled to operate based on the updated target frequency, so as to reduce the influence of frequency fluctuation on the comfort of the air conditioner.

[0106] The control method of the compressor provided in the embodiments of the present application can adjust the upper limit frequency of the compressor to the target frequency when detecting that the power supply of the compressor is abnormal, so as to reduce the damage of the operation of the compressor to the compressor when the power supply is abnormal, thereby improving the safety and reliability of the compressor.

[0107] The embodiments of the present application also provide a control method of a compressor, comprising:

[0108] In step S210, if the power supply state is power supply failure, the compressor is controlled to stop.

[0109] The difference of the normal two-line voltage fluctuates very little, within 60V. When the voltage difference exceeds 100V, it indicates that the input voltage is seriously unbalanced, at this time, it can be determined that the power supply state is power supply failure, in order to ensure the reliability of the compressor, the compressor is controlled to stop to protect the compressor.

[0110] It should be noted that the power supply failure is one form of power supply abnormality, when the voltage difference exceeds the voltage difference protection threshold such as 100V, the power supply failure is determined.

[0111] For example, when the voltage difference greater than 100V is detected for a continuous preset time period such as 30s, the AC input voltage open-phase protection is reported, and the compressor is immediately protected to stop.

[0112] In step S220, when the voltage difference between each line voltage is less than the preset voltage difference safety threshold, and the compressor stops for a preset time period, the compressor is controlled to restart.

[0113] The voltage difference safety threshold, that is, the voltage value at which the compressor can operate and the damage is small. Since the voltage difference exceeds 100V, it indicates that the input voltage is seriously unbalanced, therefore, a margin voltage can be reserved, such as obtaining the voltage difference safety threshold according to 100V and the margin voltage. For example, the margin voltage can be 10V, and the voltage difference safety threshold can be 90V.

[0114] On the one hand, the voltage difference needs to be less than the preset voltage difference safety threshold, and on the other hand, the compressor needs to stop for a preset time period such as 3 minutes, it can be considered that the fault is cleared, and the compressor has at least reduced the heating problem.

[0115] The voltage difference less than the preset voltage difference safety threshold indicates that the power supply has a phase loss or power supply imbalance, but will not cause fatal damage to the compressor, and thus is one of the conditions under which the compressor can be started. Moreover, after the compressor is stopped, if the compressor is directly started at this time, the compressor is likely to be damaged. Therefore, when the voltage difference is less than the preset voltage difference safety threshold and the compressor is stopped for more than a preset time length, such as 3 minutes, the compressor is controlled to restart. At this time, it can be understood that the compressor is started after a fault is cleared, and the safety and reliability of the compressor can be ensured.

[0116] The embodiment of the present application controls the compressor to stop when the power supply of the compressor fails, thereby protecting the compressor. Moreover, the compressor is restarted not only when the input voltage deviation is reduced, but also when the compressor is stopped for a preset time length, thereby improving the safety and reliability of the compressor operation.

[0117] To better implement the control method of the compressor of the embodiment of the present application, the embodiment of the present application further provides a control device of a compressor, which refers to Figure 6 , as shown in the figure. Figure 6 The structural block diagram of the control device of the compressor provided by the embodiment of the present application. The control device 400 of the compressor includes a first determination module 410, a second determination module 420, an adjustment module 430, and a control module 440.

[0118] The first determination module 410 is configured to determine the line voltage between each of the lines in response to detecting that at least three-phase lines supply power to the compressor.

[0119] The second determination module 420 is configured to determine the power supply state according to each of the line voltages.

[0120] The adjustment module 430 is configured to adjust the upper limit frequency of the compressor to obtain a target frequency according to each of the line voltages if the power supply state is a power supply abnormality.

[0121] The control module 440 is configured to control the operation of the compressor based on the target frequency.

[0122] All the technical solutions described above can be combined to form optional embodiments of the present application, which will not be described one by one here.

[0123] In the control device 400 of the compressor provided by the embodiment of the present application, when the power supply of the compressor is detected to be abnormal, the upper limit frequency of the compressor is adjusted to a target frequency, which can reduce the damage to the compressor caused by the operation of the compressor under the abnormal power supply, thereby improving the safety and reliability of the compressor.

[0124] Correspondingly, the embodiment of the present application also provides an air conditioner (the structure of the air conditioner is not shown in the figure). The air conditioner comprises a compressor, which is a component in a refrigeration cycle or a heating cycle of the air conditioner. The compressor is a driven fluid machine for lifting low-pressure gas to high-pressure gas, and is the heart of the refrigeration system. It sucks in low-temperature and low-pressure refrigerant gas from the suction pipe, and discharges high-temperature and high-pressure refrigerant gas to the exhaust pipe after compression by the motor operation to drive the piston, thereby providing power for the refrigeration cycle.

[0125] Of course, the air conditioner is not limited to the above-mentioned compressor, and also has an evaporator, an air conditioner outdoor unit and the like. The above is only an example and should not be understood as a limitation on the air conditioner.

[0126] Please refer to Figure 7 , Figure 7 The structural block diagram of the air conditioner provided by the embodiment of the present application is shown in the figure. The air conditioner 500 can also comprise a processor 510 having one or more processing cores, a memory 520 having one or more computer readable storage media, and a computer program stored on the memory 520 and executable on the processor 510. Among them, the processor 510 and the memory 520 are electrically connected. Those skilled in the art can understand that the structure of the air conditioner 500 shown in the figure does not constitute a limitation on the air conditioner, and can comprise more or fewer components than shown in the figure, or combine certain components, or different component arrangements.

[0127] The processor 510 is the control center of the air conditioner 500, and connects various parts of the entire air conditioner 500 through various interfaces and lines, such as the electrical connection between the processor 510 and the compressor. By running or loading the software program and / or module stored in the memory 520, and calling the data stored in the memory 520, the processor 510 executes various functions and processes data of the air conditioner 500, thereby overall monitoring the air conditioner 500.

[0128] In the embodiment of the present application, the processor 510 in the air conditioner 500 will load the instructions corresponding to the processes of one or more application programs into the memory 520, and run the application programs stored in the memory 520 by the processor 510, thereby realizing various functions according to the following steps:

[0129] In response to detecting that at least three phase lines supply power to the compressor, the line voltages between the lines are determined;

[0130] According to the line voltages, the power supply state is determined;

[0131] If the power supply state is abnormal, the upper limit frequency of the compressor is adjusted according to the line voltages to obtain a target frequency;

[0132] controlling the compressor based on the target frequency.

[0133] The specific implementation of each operation can refer to the foregoing embodiments, which will not be described here.

[0134] Those skilled in the art can understand that all or part of the steps in the various methods of the foregoing embodiments can be completed by an instruction, or by relevant hardware controlled by the instruction, which can be stored in a computer readable storage medium and loaded and executed by a processor.

[0135] To this end, the embodiment of the present application provides a computer readable storage medium, which stores a plurality of computer programs capable of being loaded by a processor to execute the steps in the control method of the compressor provided by the embodiment of the present application.

[0136] The storage medium can include a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various media capable of storing program codes.

[0137] Since the computer program stored in the storage medium can execute the steps in the control method of the compressor provided by the embodiment of the present application, the beneficial effects of any one of the control methods of the compressor provided by the embodiment of the present application can be achieved, which will be described in detail in the foregoing embodiments and will not be described here.

[0138] In the foregoing embodiments, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can refer to the related description of other embodiments.

[0139] In the description of the present application, the terms “first” and “second” are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with “first” and “second” can explicitly or implicitly include one or more features.

[0140] The control method of the compressor and the air conditioner provided by the embodiment of the present application are described in detail above, and the principle and implementation manner of the present application are described by applying specific examples in this paper, and the foregoing embodiment is only used to help understand the method and core idea of the present application; meanwhile, for those skilled in the art, the specific implementation manner and application range will be changed according to the idea of the present application, and in conclusion, the content of the specification should not be understood as limiting the present application.

Claims

1. A control method of a compressor, characterized by, The control method comprises: in response to detecting that at least three phase lines supply power to the compressor, determining line voltages between the lines; determining a power supply state according to the line voltages; if the power supply state is a power supply abnormality, adjusting an upper limit frequency of the compressor according to the line voltages to obtain a target frequency, comprising: if the power supply state is a power supply abnormality, determining a frequency adjustment offset value according to the line voltages and a preset strategy, comprising: if the power supply state is a power supply abnormality, determining an adjustment coefficient based on a voltage difference between the line voltages, a voltage difference threshold value and a voltage difference protection threshold value, wherein the voltage difference protection threshold value is greater than the voltage difference threshold value; determining a frequency adjustment offset value according to the adjustment coefficient and a preset correction frequency; adjusting the upper limit frequency of the compressor according to the frequency adjustment offset value to obtain the target frequency; controlling the compressor to operate based on the target frequency.

2. The control method according to claim 1, characterized by, The determination of the power supply state according to the line voltages comprises: calculating a voltage difference between the line voltages; determining the power supply state according to the voltage difference and a voltage difference threshold value.

3. The control method according to claim 2, characterized by, The determination of the power supply state according to the voltage difference and the voltage difference threshold value comprises: if the voltage difference is greater than or equal to the voltage difference threshold value, regarding a power supply abnormality as the power supply state; if the voltage difference is less than the voltage difference threshold value, regarding a power supply normality as the power supply state.

4. The control method according to claim 1, characterized by, The determination of the adjustment coefficient based on the voltage difference between the line voltages, the voltage difference threshold value and the voltage difference protection threshold value, wherein the voltage difference protection threshold value is greater than the voltage difference threshold value, comprises: obtaining a first difference value based on a difference between the voltage difference protection threshold value and the voltage difference threshold value; obtaining a second difference value based on a difference between the voltage difference and the voltage difference threshold value; obtaining the adjustment coefficient according to a quotient of the second difference value and the first difference value.

5. The control method according to claim 1, characterized by, After the control of the compressor based on the target frequency, the control method further comprises: updating the line voltages between the lines according to a preset sampling period; in each sampling period, updating the target frequency based on the updated line voltages, and controlling the compressor to operate based on the updated target frequency.

6. The control method according to claim 1, characterized by, The control method further comprises: if the power supply state is a power supply failure, controlling the compressor to shut down.

7. The control method according to claim 6, characterized by After the shutdown protection of the compressor when the power supply state is a power supply failure, the control method further comprises: controlling the compressor to restart when it is detected that the voltage difference between the line voltages is less than a preset voltage difference safety threshold value, and the compressor has been shut down for a preset time length.

8. An air conditioner characterized by comprising: comprise: a compressor; a processor electrically connected to the compressor, the processor being configured to execute the control method of the compressor according to any one of claims 1-7.

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