Fault restart control method of air conditioner, controller, air conditioner and storage medium

Abstract

The embodiment of the invention provides a fault restart control method of an air conditioner, a controller, the air conditioner and a storage medium, firstly, after it is determined that the air conditioner breaks down, the running time after a compressor is started is obtained; then, when the running time is smaller than or equal to the preset time, the compressor is controlled to stop; then, the starting parameters of the compressor can be adjusted to improve the starting capacity of the compressor, and the compressor is controlled to be restarted. According to the embodiment of the invention, when the air conditioner has a serious fault during starting, fault shutdown is not reported immediately, but a restart fault-tolerant mechanism is added, namely the compressor is stopped and then the starting parameters of the compressor are adjusted, so that the compressor is restarted after the starting capability is improved, the anti-interference capability during starting is improved, the starting success rate is further improved, and the starting time is shortened. The probability of fault code reporting of the indoor unit is reduced, the reworking and reworking cost of the market is reduced, the user experience is improved, and complaints are reduced.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioners, and in particular to a fault restart control method, a controller, an air conditioner and a storage medium for an air conditioner. Background Art

[0002] In the related art, when an air conditioner fails during startup, it will shut down for protection and restart. If the failure still occurs after multiple restarts, the air conditioner will display a fault code and the air conditioner's electronic control components will need to be returned to the factory for repair.

[0003] However, after the analysis of the returned parts after repair, the electronic control components with normal functions after re-inspection accounted for a large proportion of the total number of returned electronic control parts; this is because when the system is running stably, the anti-interference ability is strong and the probability of reporting faults is low; but during the period when the system starts from static to stable operation, the anti-interference ability is weak, and the probability of reporting faults under the interference of external abnormal factors is high. Since the existing fault restart control method only searches for the recurrence of the fault through repeated restarts, its anti-abnormal interference ability is weak, the fault tolerance rate is low, and it is easy to increase the probability of reporting fault codes, which will increase the market return and return of parts, and the user experience is poor. Summary of the invention

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a fault restart control method, controller, air conditioner and storage medium for an air conditioner, aiming to increase the restart fault tolerance mechanism, reduce the market return and return costs, and improve the user experience.

[0005] In a first aspect, an embodiment of the present application provides a fault restart control method for an air conditioner, comprising:

[0006] Determining that the air conditioner fails, and obtaining the running time of the compressor after startup;

[0007] When the running time is less than or equal to the preset time, controlling the compressor to stop;

[0008] The starting parameters of the compressor are adjusted to improve the starting capability of the compressor, and the compressor is controlled to restart.

[0009] According to some embodiments of the present application, the fault includes at least one of the following: compressor overcurrent fault, intelligent power module fault, power factor correction circuit switch fault, compressor stall fault, bus voltage undervoltage fault, compressor zero speed fault.

[0010] According to some embodiments of the present application, before controlling the compressor to stop, the fault restart control method further includes:

[0011] Obtaining the number of restarts of the compressor during startup;

[0012] When the restart number is less than or equal to the first preset number, the restart number is updated and the compressor is controlled to stop.

[0013] According to some embodiments of the present application, the startup process of the compressor includes a positioning stage, an open-loop control stage, and a closed-loop control stage; and adjusting the startup parameters of the compressor to improve the startup capability of the compressor includes at least one of the following:

[0015] Adjusting the starting parameters of the compressor during the positioning phase to improve the starting capability of the compressor;

[0016] Adjusting the starting parameters of the compressor during the open-loop control phase to improve the starting capability of the compressor;

[0017] The starting parameters of the compressor in the closed-loop control stage are adjusted to improve the starting capability of the compressor.

[0018] According to some embodiments of the present application, when the startup parameters of the compressor include the startup parameters of the positioning stage, adjusting the startup parameters of the compressor in the positioning stage includes at least one of the following:

[0019] increasing the positioning time of the compressor;

[0020] The positioning current of the compressor is increased.

[0021] According to some embodiments of the present application, when the startup parameters of the compressor include the startup parameters of the open-loop control stage, adjusting the startup parameters of the compressor in the open-loop control stage includes at least one of the following:

[0022] Increasing the current loop bandwidth of the compressor in the open-loop control stage to improve the proportional regulation coefficient and / or the integral regulation coefficient in the open-loop control stage;

[0023] The open-loop target frequency of the compressor in the open-loop control stage is reduced.

[0024] According to some embodiments of the present application, when the startup parameters of the compressor include the startup parameters of the closed-loop control stage, adjusting the startup parameters of the compressor in the closed-loop control stage includes at least one of the following:

[0025] adjusting the frequency increase rate of the compressor during the process of switching from the open-loop target frequency to the closed-loop target frequency during the closed-loop control phase;

[0026] The frequency reduction rate of the compressor during the process of switching from the open-loop target frequency to the closed-loop target frequency in the closed-loop control stage is adjusted.

[0027] According to some embodiments of the present application, the fault restart control method further includes:

[0028] When the running time is greater than the preset time or the restart times are greater than the first preset times, the compressor is controlled to stop and a fault is reported through the indoor unit, and a total number of faults reported by the indoor unit is obtained;

[0029] When the total number of faults is less than a second preset number, the restart number is reset to zero, and the compressor is controlled to restart.

[0030] According to some embodiments of the present application, after obtaining the total number of faults reported by the indoor unit, the fault restart control method further includes:

[0031] When the total number of faults is greater than or equal to the second preset number, the total number of faults is reset to zero, and the indoor unit is controlled to display a fault code.

[0032] In a second aspect, an embodiment of the present application provides a controller comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the fault restart control method for the air conditioner as described in the first aspect above when running the computer program.

[0033] In a third aspect, an embodiment of the present application provides an air conditioner, comprising a controller as described in the second aspect above.

[0034] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are used to execute the fault restart control method for the air conditioner as described in the first aspect above.

[0035] According to the technical solution of the embodiment of the present application, at least the following beneficial effects are achieved: first, after determining that the air conditioner has a fault, the embodiment of the present application will obtain the running time after the compressor is started; then, when the running time is less than or equal to the preset time, the embodiment of the present application will control the compressor to stop; then, the embodiment of the present application will adjust the starting parameters of the compressor to improve the starting ability of the compressor, and control the compressor to restart. Because the embodiment of the present application does not immediately report the fault and shut down when a serious fault occurs during the startup of the air conditioner, but adds a restart fault tolerance mechanism, that is, after stopping the compressor, the starting parameters of the compressor are adjusted to improve the starting ability of the compressor and then restart it, thereby improving the anti-interference ability during startup, and then improving the startup success rate, reducing the probability of the indoor unit reporting a fault code, reducing the market return and repair costs, improving user experience, and reducing complaints.

[0036] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings are used to provide further understanding of the technical solution of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present application and do not constitute a limitation on the technical solution of the present application.

[0038] Figure 1 is a flow chart of a fault restart control method for an air conditioner provided by an embodiment of the present application;

[0039] Figure 2 is a flow chart of a fault restart control method for an air conditioner provided by another embodiment of the present application;

[0040] Figure 3 is a flow chart of a fault restart control method for an air conditioner provided by another embodiment of the present application;

[0041] Figure 4 is a flow chart of a fault restart control method for an air conditioner provided by another embodiment of the present application;

[0042] Figure 5 is a flow chart of a fault restart control method for an air conditioner provided by another embodiment of the present application;

[0043] Figure 6 is a flow chart of a fault restart control method for an air conditioner provided by another embodiment of the present application;

[0044] Figure 7 is a flow chart of a fault restart control method for an air conditioner provided by another embodiment of the present application;

[0045] Figure 8 is a flow chart of a fault restart control method for an air conditioner provided by another embodiment of the present application;

[0046] Fig. 9 is a flow chart of a fault restart control method for an air conditioner provided by another embodiment of the present application;

[0047] Fig.10 is a flow chart of a fault restart control method for an air conditioner provided by another embodiment of the present application;

[0048] Fig.11 is a flow chart of a fault restart control method for an air conditioner provided by another embodiment of the present application;

[0049] Fig.12is a flow chart of a fault restart control method for an air conditioner provided by another embodiment of the present application;

[0050] Fig.13 is a flow chart of a fault restart control method for an air conditioner provided by another embodiment of the present application;

[0051] Fig.14 This is an overall flow chart of a fault restart control method for an air conditioner provided by an embodiment of the present application;

[0052] Fig.15 It is a schematic diagram of a controller for executing a fault restart control method for an air conditioner provided by an embodiment of the present application. DETAILED DESCRIPTION

[0053] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0054] In the description of the present application, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0055] In the description of this application, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0056] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0057] In some cases, when an air conditioner fails during startup, it will shut down for protection and restart. If the failure persists after multiple restarts, the air conditioner will display a fault code and the air conditioner's electronic control components will need to be returned to the factory for repair.

[0058] However, after the analysis of the returned parts after repair, the electronic control components with normal functions after re-inspection accounted for a large proportion of the total number of returned electronic control parts; this is because when the system is running stably, the anti-interference ability is strong and the probability of reporting faults is low; but during the period when the system starts from static to stable operation, the anti-interference ability is weak, and the probability of reporting faults under the interference of external abnormal factors is high. Since the existing fault restart control method only searches for the recurrence of the fault through repeated restarts, its anti-abnormal interference ability is weak, the fault tolerance rate is low, and it is easy to increase the probability of reporting fault codes, which will increase the market return and return of parts, and the user experience is poor.

[0059] Based on the above situation, the embodiment of the present application proposes a fault restart control method, controller, air conditioner and storage medium for an air conditioner, aiming to increase the restart fault tolerance mechanism, reduce market returns and repair costs, and improve user experience.

[0060] The following further describes various embodiments of the air conditioner fault restart control method of the present application in conjunction with the accompanying drawings.

[0061] like Figure 1 As shown, Figure 1 1 is a flow chart of a fault restart control method for an air conditioner provided by an embodiment of the present application. The fault restart control method for an air conditioner may include but is not limited to step S110, step S120 and step S130.

[0062] Step S110, determining that the air conditioner fails, and obtaining the running time of the compressor after starting;

[0063] Step S120: When the running time is less than or equal to the preset time, the compressor is controlled to stop;

[0064] Step S130: adjusting the startup parameters of the compressor to improve the startup capability of the compressor, and controlling the compressor to restart.

[0065] In one embodiment, the compressor starts and begins timing. When a serious fault occurs in the air conditioner, the timing time is used as the running time after the compressor is started. If the running time is less than or equal to the preset time, it indicates that the serious fault occurred during the startup of the compressor. In this case, it is necessary to control the compressor to stop running and adjust the startup parameters of the compressor to improve the startup ability of the compressor. Then, restart the compressor and determine whether the air conditioner will continue to have serious faults.

[0066] It should be noted that the above-mentioned fault type may refer to a serious fault requiring the air conditioner to shut down for protection, or may refer to a serious fault close to requiring the air conditioner to shut down for protection. The fault location in the embodiment of the present application may be located in the outdoor unit or in the indoor unit. The embodiment of the present application does not limit the fault type and fault location of the fault.

[0067] In addition, it should be noted that the above-mentioned serious fault may be a compressor overcurrent fault, an intelligent power module fault, a power factor correction circuit switch fault, a compressor stall fault, a bus voltage undervoltage fault, a compressor zero speed fault, or other faults, and the embodiments of the present application do not make specific limitations on this.

[0068] It can be understood that the above-mentioned preset time can be pre-set, and the preset time is used to distinguish the startup phase and stable operation phase of the compressor. Specifically, if the running time of the compressor is less than or equal to the preset time, then it can be considered that the compressor is currently in the startup phase; if the running time of the compressor is greater than the preset time, then it can be considered that the compressor is currently in the stable operation phase.

[0069] It should be noted that the startup parameters of the compressor refer to one or more operating parameters of the compressor during the startup phase. For example, the startup parameters of the compressor may be operating parameters of the positioning phase, operating parameters of the open-loop control phase, operating parameters of the closed-loop control phase, or operating parameters of at least two of the above phases. The embodiments of the present application do not make specific limitations on this.

[0070] It is worth noting that when a serious fault occurs during the startup of the air conditioner, the embodiment of the present application does not immediately report the fault and shut down, but instead adds a restart fault tolerance mechanism, that is, after stopping the compressor, the startup parameters of the compressor are adjusted to improve the compressor's startup ability and then restart it, thereby improving the anti-interference ability during startup, and then improving the startup success rate, reducing the probability of the indoor unit reporting a fault code, reducing the market return and repair costs, improving user experience, and reducing complaints.

[0071] In addition, if Figure 2 As shown, Figure 2 This is a flow chart of a fault restart control method for an air conditioner provided by another embodiment of the present application. The above step S120 may include but is not limited to step S210 and step S220.

[0072] Step S210: when the running time is less than or equal to the preset time, obtaining the number of restarts of the compressor during the startup period;

[0073] Step S220: When the restart number is less than or equal to the first preset number, update the restart number and control the compressor to stop.

[0074] In one embodiment, the embodiment of the present application can also increase the fault number fault tolerance mechanism. Specifically, if it is determined that the compressor has a serious fault during the startup phase, the embodiment of the present application will obtain the number of restarts of the compressor during the previous startup period. If the number of restarts is less than or equal to the first preset number, the embodiment of the present application will control the compressor to stop running and adjust the startup parameters of the compressor to improve the startup ability of the compressor, and then restart the compressor; if the number of restarts is greater than the first preset number, the embodiment of the present application will Fig.12 and Fig.13 Execute the method steps in .

[0075] It can be understood that the above-mentioned first preset number of times can be pre-set, and the first preset number of times is used to limit the number of times the compressor startup parameters are adjusted. Specifically, when the number of restarts is less than or equal to the first preset number of times, the embodiment of the present application can continue to try to restart by adjusting the startup parameters of the compressor; however, when the number of restarts is greater than the first preset number of times, the embodiment of the present application will no longer continue to try to restart by adjusting the startup parameters of the compressor.

[0076] It should be noted that the startup process of the compressor may include but is not limited to the following three stages: a positioning stage, an open-loop control stage and a closed-loop control stage; specifically, first, the compressor will enter the positioning stage after receiving the start command; then enter the open-loop control stage, and drag the compressor frequency to the open-loop target frequency through the open-loop control method; then, the compressor will switch to the closed-loop control stage, and adjust the compressor frequency to the closed-loop target frequency, that is, the required frequency, through the closed-loop control method.

[0077] Based on the three stages of the compressor startup process, the above step S130 may include but is not limited to: Figures 3 to 5 There are three implementation scenarios, as follows:

[0078] like Figure 3 As shown, Figure 3 This is a flow chart of a fault restart control method for an air conditioner provided by another embodiment of the present application. The above step S130 may include but is not limited to step S310 and step S320.

[0079] Step S310, adjusting the startup parameters of the compressor in the positioning phase to improve the startup capability of the compressor;

[0080] Step S320, controlling the compressor to restart.

[0081] like Figure 4 As shown, Figure 4This is a flow chart of a fault restart control method for an air conditioner provided by another embodiment of the present application. The above step S130 may include but is not limited to step S410 and step S420.

[0082] Step S410, adjusting the startup parameters of the compressor in the open-loop control stage to improve the startup capability of the compressor;

[0083] Step S420, controlling the compressor to restart.

[0084] like Figure 5 As shown, Figure 5 This is a flow chart of a fault restart control method for an air conditioner provided by another embodiment of the present application. The above step S130 may include but is not limited to step S510 and step S520.

[0085] Step S510, adjusting the startup parameters of the compressor in the closed-loop control stage to improve the startup capability of the compressor;

[0086] Step S520, controlling the compressor to restart.

[0087] In one embodiment, if it is determined that a serious fault occurs in the compressor during the startup phase, it is necessary to control the compressor to stop running and adjust the startup parameters of the compressor. Specifically, the embodiment of the present application can adjust the operating parameters of the positioning phase, the operating parameters of the open-loop control phase, the operating parameters of the closed-loop control phase, or the operating parameters of at least two phases at the same time. The embodiment of the present application does not make specific limitations on this. After adjusting the operating parameters of at least one phase of the compressor, the anti-interference ability of the compressor when restarting will be improved, thereby increasing the startup success rate, reducing the probability of the indoor unit reporting a fault code, reducing the market return and repair costs, improving user experience, and reducing complaints.

[0088] It should be noted that the startup parameters of the compressor at each stage may be time parameters, current parameters, voltage parameters, bandwidth parameters, frequency parameters, or other types of parameters. The embodiment of the present application does not specifically limit the types of startup parameters of the compressor at each stage.

[0089] It should be noted that, when the startup parameters of the compressor include the startup parameters of the positioning phase, the above steps S310 and S320 may include but are not limited to: Figure 6 or Figure 7 There are two implementation scenarios, as follows:

[0090] like Figure 6 As shown, Figure 6This is a flow chart of a fault restart control method for an air conditioner provided by another embodiment of the present application. The above steps S310 and S320 may include but are not limited to steps S610 and S620.

[0091] Step S610, increasing the positioning time of the compressor;

[0092] Step S620, controlling the compressor to restart.

[0093] like Figure 7 As shown, Figure 7 This is a flow chart of a fault restart control method for an air conditioner provided by another embodiment of the present application. The above steps S310 and S320 may include but are not limited to steps S710 and S720.

[0094] Step S710, increasing the positioning current of the compressor;

[0095] Step S720, control the compressor to restart.

[0096] In one embodiment, when it is necessary to adjust the operating parameters of the compressor during the positioning stage, the embodiment of the present application can increase the positioning time of the compressor during the positioning stage, so as to make the positioning more precise, and then improve the starting ability before attempting to restart the compressor; or, the embodiment of the present application can increase the positioning current of the compressor during the positioning stage, improve the output torque in the positioning stage and the open-loop control stage, and then improve the starting ability before attempting to restart the compressor; or, the embodiment of the present application can simultaneously increase the positioning time and positioning current of the compressor during the positioning stage, so as to make the positioning more precise, and improve the output torque in the positioning stage and the open-loop control stage, and then improve the starting ability before attempting to restart the compressor.

[0097] It should be noted that, when the startup parameters of the compressor include startup parameters of the open-loop control stage, the above steps S410 and S420 may include but are not limited to: Figure 8 or Fig. 9 There are two implementation scenarios, as follows:

[0098] like Figure 8 As shown, Figure 8 This is a flow chart of a fault restart control method for an air conditioner provided by another embodiment of the present application. The above steps S410 and S420 may include but are not limited to steps S810 and S820.

[0099] Step S810, increasing the current loop bandwidth of the compressor in the open-loop control stage to improve the proportional adjustment coefficient and / or the integral adjustment coefficient in the open-loop control stage;

[0100] Step S820, control the compressor to restart.

[0101] In one embodiment, when it is necessary to adjust the operating parameters of the compressor in the open-loop control stage, the embodiment of the present application can increase the current loop bandwidth of the compressor in the open-loop control stage. Since the increase in the current loop bandwidth will increase the proportional adjustment coefficient and the integral adjustment coefficient of the current loop control, the control system response speed is improved, and the starting capability is improved before trying to restart the compressor.

[0102] It should be noted that the proportional adjustment coefficient KP of the above-mentioned current loop control is calculated as follows: proportional adjustment coefficient KP = current loop bandwidth * compressor inductance. Therefore, the proportional adjustment coefficient KP is directly proportional to the current loop bandwidth, so increasing the current loop bandwidth will increase the proportional adjustment coefficient KP of the current loop control. In addition, the integral adjustment coefficient KI of the above-mentioned current loop control is calculated as follows: integral adjustment coefficient KI = current loop bandwidth * compressor resistance. Therefore, the integral adjustment coefficient KI is directly proportional to the current loop bandwidth, so increasing the current loop bandwidth will increase the integral adjustment coefficient KI of the current loop control.

[0103] like Fig. 9 As shown, Fig. 9 This is a flow chart of a fault restart control method for an air conditioner provided by another embodiment of the present application. The above steps S410 and S420 may include but are not limited to steps S910 and S920.

[0104] Step S910, reducing the open-loop target frequency of the compressor in the open-loop control stage;

[0105] Step S920, control the compressor to restart.

[0106] In one embodiment, when it is necessary to adjust the operating parameters of the compressor in the open-loop control stage, the embodiment of the present application can reduce the open-loop target frequency in the open-loop control stage, thereby reducing the open-loop torque requirement, and then improving the starting capability before attempting to restart the compressor.

[0107] It should be noted that, when the startup parameters of the compressor include startup parameters of the closed-loop control stage, the above steps S510 and S520 may include but are not limited to: Fig.10 or Fig.11 There are two implementation scenarios, as follows:

[0108] like Fig.10 As shown, Fig.10 This is a flow chart of a fault restart control method for an air conditioner provided by another embodiment of the present application. The above-mentioned step S510 and step S520 may include but are not limited to step S1010 and step S1020.

[0109] Step S1010, adjusting the frequency increase rate of the compressor during the process of switching from the open-loop target frequency to the closed-loop target frequency in the closed-loop control stage;

[0110] Step S1020, controlling the compressor to restart.

[0111] like Fig.11 As shown, Fig.11 This is a flow chart of a fault restart control method for an air conditioner provided by another embodiment of the present application. The above steps S510 and S520 may include but are not limited to steps S1110 and S1120.

[0112] Step S1110, adjusting the frequency reduction rate of the compressor during the process of switching from the open-loop target frequency to the closed-loop target frequency in the closed-loop control stage;

[0113] Step S1120, controlling the compressor to restart.

[0114] In one embodiment, when it is necessary to adjust the operating parameters of the compressor in the closed-loop control stage, the embodiment of the present application can change the frequency increase rate and / or frequency reduction rate in the process of switching from the open-loop target frequency to the closed-loop target frequency in the closed-loop control stage, thereby optimizing the system pressure change and then improving the starting capability before attempting to restart the compressor.

[0115] It is understandable that the adjustment of the above-mentioned frequency increase rate and / or frequency decrease rate may be to increase the rate or to decrease the rate, and the embodiments of the present application do not specifically limit this.

[0116] It should be noted that regarding the process of switching from the open-loop target frequency to the closed-loop target frequency in the above-mentioned closed-loop control stage, there may be one or more frequency-up stages in the process, and there may also be one or more frequency-down stages in the process, and the embodiments of the present application do not make specific limitations on this.

[0117] In addition, if Fig.12 As shown, Fig.12 1 is a flow chart of a fault restart control method for an air conditioner provided by another embodiment of the present application. The fault restart control method of the embodiment of the present application may also include but is not limited to step S1210 and step S1220.

[0118] Step S1210: When the running time is greater than the preset time or the number of restarts is greater than the first preset number, the compressor is controlled to stop and the fault is reported through the indoor unit, and the total number of faults reported by the indoor unit is obtained;

[0119] Step S1220: When the total number of faults is less than the second preset number, the restart number is reset to zero and the compressor is controlled to restart.

[0120] In addition, if Fig.13 As shown, Fig.13 13 is a flow chart of a fault restart control method for an air conditioner provided by another embodiment of the present application. The fault restart control method of the embodiment of the present application may also include but is not limited to step S1310 and step S1320.

[0121] Step S1310: When the running time is greater than the preset time or the number of restarts is greater than the first preset number, the compressor is controlled to stop and the fault is reported through the indoor unit, and the total number of faults reported by the indoor unit is obtained;

[0122] Step S1320: When the total number of faults is greater than or equal to the second preset number, the total number of faults is reset to zero, and the indoor unit is controlled to display a fault code.

[0123] In one embodiment, based on the above Fig.12 and Fig.13 If a serious fault occurs in the compressor during the stable operation stage or the number of serious faults of the compressor during the startup stage is greater than the first preset number, then the embodiment of the present application will control the compressor to stop running, and then the outdoor unit will report the fault to the indoor unit, and report the fault through the indoor unit.

[0124] In addition, it should be noted that the embodiment of the present application can also add a fault reporting number fault tolerance mechanism. Specifically, when the indoor unit reports a fault, the total number of faults reported by the current indoor unit will be recorded. If the total number of faults is less than the second preset number, then the embodiment of the present application will reset the restart number to 0 and restart the compressor; if the total number of faults is greater than or equal to the second preset number, then the embodiment of the present application will display the fault code through the indoor unit to inform the user that the air conditioner he is using has a serious fault and needs to be returned to the factory for repair, and will also reset the total number of faults to 0 and control the air conditioner to stop running.

[0125] Based on the fault restart control method of the air conditioner of each of the above-mentioned embodiments, specific embodiments of the fault restart control method of the air conditioner of the present application are respectively proposed below.

[0126] like Fig.14 As shown, Fig.14 This is an overall flow chart of a fault restart control method for an air conditioner provided by an embodiment of the present application. The fault restart control method for an air conditioner may include but is not limited to steps S1401 to S1418.

[0127] Step S1401, start;

[0128] Step S1402, setting the restart times n to 0;

[0129] Step S1403, the compressor starts;

[0130] Step S1404, calculating the running time T of the compressor;

[0131] Step S1405, determine whether a serious fault occurs, if yes, execute step S1407, if no, execute step S1406;

[0132] Step S1406: the outdoor unit operates normally;

[0133] Step S1407, determine whether the running time T is less than or equal to the threshold T1, if yes, execute step S1408, if no, execute step S1412;

[0134] Step S1408, determine whether the restart times n is less than or equal to the threshold m, if yes, execute step S1409, if no, execute step S1412;

[0135] Step S1409, setting the restart times n to n+1;

[0136] Step S1410, the compressor stops and delays for a time t1;

[0137] Step S1411, improving the starting capability of the compressor;

[0138] Step S1412, the compressor stops;

[0139] Step S1413: the outdoor unit reports a fault, and the fault is transmitted to the indoor unit;

[0140] Step S1414, total number of indoor unit failures N=N+1;

[0141] Step S1415, determine whether the total number of indoor unit failures N is greater than or equal to 3, if so, execute step S1417, if not, execute step S1416;

[0142] Step S1416, delay for 3 minutes;

[0143] Step S1417, the indoor unit displays a fault code, the air conditioner stops, N=0;

[0144] Step S1418, end.

[0145] Specifically, since the compressor needs a small pressure and load to start normally, but the system load and pressure will increase when the compressor is running, it is necessary to wait for 3 minutes after a fault shutdown, and wait for the system load to be unloaded and reduced before restarting. If the waiting time is short, the compressor startup capacity needs to be improved simultaneously to restart.

[0146] In this regard, based on the above Fig.14The method steps in the method include the following process: after starting up, the number of compressor restarts n is set to 0, and the running time T of the compressor is recorded after the compressor is started. When a serious fault occurs, if T≤threshold T1, it is considered that a fault occurred during the startup period, and then the number of restarts n is determined. If the number of restarts n≤m, the number of restarts n is increased by 1, and the compressor is controlled to stop and the t1 time is extended. Since the fault occurs due to abnormal interference during the startup period, the fault tolerance can be increased by improving the starting ability of the compressor, including but not limited to the following methods: 1. Increase the compressor positioning time; 2. Increase the compressor positioning current; 3. Increase the open-loop current loop bandwidth, thereby increasing the proportional adjustment coefficient KP and the integral adjustment coefficient KI; 4. Reduce the open-loop target speed; 5. Change the frequency increase and decrease rate of the compressor. Then, start the compressor again to determine whether there is a fault.

[0147] In addition, when the compressor startup time T>threshold T1 or the restart times n>m, the compressor stops, the outdoor unit reports a fault, and transmits the fault to the indoor unit.

[0148] It should be noted that different set values ​​can be set according to the air conditioner model, system load size, compressor model, environmental conditions and other conditions. In the embodiment of the present application, the values ​​in Table 1 below can be set but are not limited to:

[0149] Table 1

[0150]

[0151] In addition, it should be noted that the following methods can be used to improve the starting capability of the compressor: 1. Increasing the positioning time of the compressor can make the positioning more accurate, thereby improving the starting capability. 2. Increasing the positioning current of the compressor can increase the output torque in the positioning stage and the open-loop control stage, thereby improving the starting capability. 3. Since the proportional adjustment coefficient KP of the current loop control = current loop bandwidth * compressor inductance, and the integral adjustment coefficient KI of the current loop control = current loop bandwidth * compressor resistance, the current loop bandwidth in the open-loop control stage can be increased, thereby increasing the proportional adjustment coefficient KP and integral adjustment coefficient KI of the current loop control, thereby increasing the control system response speed and improving the starting capability. 4. Reducing the open-loop target frequency can reduce the open-loop torque demand, thereby improving the starting capability. 5. Changing the compressor frequency increase and decrease rate can optimize the system pressure change, thereby improving the starting capability.

[0152] Based on the fault restart control method of the air conditioner in each of the above-mentioned embodiments, various embodiments of the controller, the air conditioner and the computer-readable storage medium of the present application are respectively proposed below.

[0153] like Fig.15 As shown, Fig.151 is a schematic diagram of a controller for executing a fault restart control method for an air conditioner provided by an embodiment of the present application. The controller 100 implemented in the present application includes: a processor 110, a memory 120, and a computer program stored in the memory 120 and executable on the processor 110, wherein: Fig.15 In the figure, a processor 110 and a memory 120 are taken as an example.

[0154] The processor 110 and the memory 120 may be connected via a bus or other means. Fig.15 The example of connecting through bus is taken in the following.

[0155] The memory 120, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs and non-transitory computer executable programs. In addition, the memory 120 may include a high-speed random access memory, and may also include a non-transitory memory, such as at least one disk storage device, a flash memory device, or other non-transitory solid-state storage device. In some embodiments, the memory 120 may optionally include a memory 120 remotely arranged relative to the processor 110, and these remote memories 120 may be connected to the controller 100 via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0156] Those skilled in the art will understand that Fig.15 The device structure shown in the figure does not constitute a limitation on the controller 100, and may include more or less components than shown in the figure, or combine certain components, or arrange the components differently.

[0157] exist Fig.15 In the controller 100 shown, the processor 110 can be used to call the fault restart control program of the air conditioner stored in the memory 120, so as to implement the fault restart control method of the air conditioner described above. Specifically, the non-transient software program and instructions required to implement the fault restart control method of the air conditioner described above are stored in the memory 120, and when executed by the processor 110, the fault restart control method of the air conditioner described above is executed.

[0158] It is worth noting that since the controller 100 of the embodiment of the present application can execute the fault restart control method of the air conditioner in any of the above-mentioned embodiments, the specific implementation manner and technical effects of the controller 100 of the embodiment of the present application can refer to the specific implementation manner and technical effects of the fault restart control method of the air conditioner in any of the above-mentioned embodiments.

[0159] In addition, an embodiment of the present application further provides an air conditioner, comprising the controller of the above embodiment.

[0160] It is worth noting that since the air conditioner of the embodiment of the present application includes the controller of the above-mentioned embodiment, and the controller of the above-mentioned embodiment is capable of executing the fault restart control method of the air conditioner of any of the above-mentioned embodiments, the specific implementation manner and technical effects of the air conditioner of the embodiment of the present application can refer to the specific implementation manner and technical effects of the fault restart control method of the air conditioner of any of the above-mentioned embodiments.

[0161] In addition, an embodiment of the present application further provides a computer-readable storage medium, which stores computer-executable instructions, and the computer-executable instructions are used to execute the above-mentioned air conditioner fault restart control method. Figures 1 to 14 The method steps in .

[0162] It is worth noting that since the computer-readable storage medium of the embodiment of the present application can execute the fault restart control method of the air conditioner of any of the above-mentioned embodiments, the specific implementation manner and technical effects of the computer-readable storage medium of the embodiment of the present application can refer to the specific implementation manner and technical effects of the fault restart control method of the air conditioner of any of the above-mentioned embodiments.

[0163] It will be appreciated by those skilled in the art that all or some of the steps and systems in the disclosed method above may be implemented as software, firmware, hardware and appropriate combinations thereof. Some physical components or all physical components may be implemented as software executed by a processor, such as a central processing unit, a digital signal processor or a microprocessor, or may be implemented as hardware, or may be implemented as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer storage medium (or a non-transitory medium) and a communication medium (or a temporary medium). As known to those skilled in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules or other data). Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, disk storage or other magnetic storage devices, or any other medium that may be used to store desired information and may be accessed by a computer. Furthermore, it is well known to those skilled in the art that communication media generally include computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

[0164] The above is a specific description of the preferred implementation of the present application, but the present application is not limited to the above implementation mode. Technical personnel familiar with the field can also make various equivalent modifications or substitutions under the shared conditions without violating the spirit of the present application. These equivalent modifications or substitutions are all included in the scope defined by the claims of the present application.

Claims

1. A fault restart control method for an air conditioner, characterized in that: include: Determining that the air conditioner fails, and obtaining the running time of the compressor after startup; When the running time is less than or equal to the preset time, controlling the compressor to stop; The starting parameters of the compressor are adjusted to improve the starting capability of the compressor, and the compressor is controlled to restart.

2. The fault restart control method according to claim 1, characterized in that: The fault includes at least one of the following: compressor overcurrent fault, intelligent power module fault, power factor correction circuit switch fault, compressor stall fault, bus voltage undervoltage fault, compressor zero speed fault.

3. The fault restart control method according to claim 1, characterized in that: Before controlling the compressor to stop, the fault restart control method further includes: Obtaining the number of restarts of the compressor during startup; When the restart number is less than or equal to the first preset number, the restart number is updated and the compressor is controlled to stop.

4. The fault restart control method according to claim 1, characterized in that: The startup process of the compressor includes a positioning stage, an open-loop control stage and a closed-loop control stage; the adjusting the startup parameters of the compressor to improve the startup capability of the compressor includes at least one of the following: Adjusting the starting parameters of the compressor during the positioning phase to improve the starting capability of the compressor; Adjusting the starting parameters of the compressor during the open-loop control phase to improve the starting capability of the compressor; The starting parameters of the compressor in the closed-loop control stage are adjusted to improve the starting capability of the compressor.

5. The fault restart control method according to claim 4, characterized in that: In the case that the startup parameters of the compressor include the startup parameters of the positioning stage, the adjusting the startup parameters of the compressor in the positioning stage includes at least one of the following: increasing the positioning time of the compressor; The positioning current of the compressor is increased.

6. The fault restart control method according to claim 4, characterized in that: In the case where the startup parameters of the compressor include the startup parameters of the open-loop control stage, adjusting the startup parameters of the compressor in the open-loop control stage includes at least one of the following: Increasing the current loop bandwidth of the compressor in the open-loop control stage to improve the proportional regulation coefficient and / or the integral regulation coefficient in the open-loop control stage; The open-loop target frequency of the compressor in the open-loop control stage is reduced.

7. The fault restart control method according to claim 4, characterized in that: In the case where the startup parameters of the compressor include the startup parameters of the closed-loop control stage, adjusting the startup parameters of the compressor in the closed-loop control stage includes at least one of the following: adjusting the frequency increase rate of the compressor during the process of switching from the open-loop target frequency to the closed-loop target frequency during the closed-loop control phase; The frequency reduction rate of the compressor during the process of switching from the open-loop target frequency to the closed-loop target frequency in the closed-loop control stage is adjusted.

8. The fault restart control method according to claim 3, characterized in that: Also includes: When the running time is greater than the preset time or the restart times are greater than the first preset times, the compressor is controlled to stop and a fault is reported through the indoor unit, and a total number of faults reported by the indoor unit is obtained; When the total number of faults is less than a second preset number, the restart number is reset to zero, and the compressor is controlled to restart.

9. The fault restart control method according to claim 8, characterized in that: After obtaining the total number of faults reported by the indoor unit, the fault restart control method further includes: When the total number of faults is greater than or equal to the second preset number, the total number of faults is reset to zero, and the indoor unit is controlled to display a fault code.

10. A controller, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the fault restart control method according to any one of claims 1 to 9 when executing the computer program.

11. An air conditioner, characterized in that: Comprising a controller as claimed in claim 10.

12. A computer-readable storage medium, characterized in that: Computer executable instructions are stored, and the computer executable instructions are used to execute the fault restart control method according to any one of claims 1 to 9.

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