Fault detection method and device, air conditioner and computer readable storage medium

Abstract

The embodiment of the invention provides a fault detection method and device, an air conditioner and a computer readable storage medium, the air conditioner comprises an indoor fan, the indoor fan comprises indoor fan blades and an indoor motor, and the indoor motor is used for driving the indoor fan blades to rotate; the fault detection method comprises the following steps: determining a set rotating speed range of an indoor motor according to a set wind gear of an indoor fan; determining whether the operation rotating speed of the indoor motor is within a set rotating speed range; when it is determined that the running rotating speed of the indoor motor is out of the set rotating speed range, whether the rotating speed adjusting times of the indoor motor are larger than an adjusting time threshold value or not is determined; when it is determined that the rotating speed adjusting times of the indoor motor are smaller than or equal to the adjusting time threshold value, the indoor motor is controlled to conduct rotating speed adjustment once so that the running rotating speed of the indoor motor can be within the set rotating speed range, and the rotating speed adjusting times of the indoor motor are updated; and when it is determined that the rotating speed adjusting times of the indoor motor are larger than the adjusting time threshold value, the air conditioner is controlled to stop.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioners, in particular to a fault detection method and device, an air conditioner and a computer readable storage medium. BACKGROUND

[0002] The air conditioner is provided with an indoor fan for driving indoor air to circulate and flow. When the indoor fan has a fault such as serious dirt, structural damage, etc., the air conditioner cannot work normally. In the related art, the air conditioner cannot accurately and timely detect the fault state of the indoor fan, which leads to the air conditioner not being able to timely shut down for safety, and thus running in the fault state to cause further structural damage. SUMMARY

[0003] The embodiments of the present application provide a fault detection method, device, air conditioner and computer readable storage medium, which can accurately and timely detect the fault state of the indoor fan, so as to timely control the air conditioner to shut down for safety and ensure the operation safety of the air conditioner.

[0004] In a first aspect, the embodiments of the present application provide a fault detection method applied to an air conditioner, wherein the air conditioner comprises an indoor fan, the indoor fan comprises an indoor fan blade and an indoor motor, and the indoor motor is used to drive the indoor fan blade to rotate; the fault detection method comprises the following steps: determining a set speed range of the indoor motor according to a set wind gear of the indoor fan; determining whether the running speed of the indoor motor is located in the set speed range; when it is determined that the running speed of the indoor motor is located outside the set speed range, determining whether the speed adjustment times of the indoor motor are greater than an adjustment times threshold; when it is determined that the speed adjustment times of the indoor motor are less than or equal to the adjustment times threshold, controlling the indoor motor to perform a speed adjustment once so that the running speed of the indoor motor is located in the set speed range, and updating the speed adjustment times of the indoor motor; and when it is determined that the speed adjustment times of the indoor motor are greater than the adjustment times threshold, controlling the air conditioner to shut down.

[0005] In some embodiments, the fault detection method comprises: when it is determined that the running speed of the indoor motor is located in the set speed range, determining whether the air conditioner is dirty and blocked according to the running electrical parameter of the indoor motor; and the running electrical parameter comprises at least one of the running voltage and the running current of the indoor motor.

[0006] In some embodiments, determining whether the air conditioner is dirty and blocked according to an operating electrical parameter of the indoor motor includes: obtaining the operating electrical parameter of the indoor motor, the operating electrical parameter including at least one of an operating voltage and an operating current of the indoor motor; determining whether the operating electrical parameter of the indoor motor is greater than a dirty and blocked threshold, the dirty and blocked threshold including at least one of a dirty and blocked voltage threshold and a dirty and blocked current threshold; and determining that the air conditioner is dirty and blocked when it is determined that the operating electrical parameter of the indoor motor is greater than the dirty and blocked threshold.

[0007] In some embodiments, after determining that the air conditioner is dirty and blocked, the fault detection method includes: determining whether the operating electrical parameter of the indoor motor is greater than a dangerous threshold, the dangerous threshold including at least one of a dangerous voltage threshold and a dangerous current threshold, the dangerous threshold being greater than the dirty and blocked threshold; and controlling the air conditioner to shut down when it is determined that the operating electrical parameter of the indoor motor is greater than the dangerous threshold.

[0008] In some embodiments, when controlling the air conditioner to shut down, the fault detection method includes: controlling the air conditioner to alarm.

[0009] In some embodiments, after determining that the air conditioner is dirty and blocked, the fault detection method includes: controlling the air conditioner to display dirty and blocked early warning information.

[0010] In some embodiments, before determining whether the operating electrical parameter of the indoor motor is greater than the dirty and blocked threshold, the fault detection method includes: setting different layers of filter screens at an air return inlet of the air conditioner to form a plurality of dirty simulation scenarios; controlling the air conditioner to operate under the plurality of dirty simulation scenarios and measuring the operating electrical parameter of the indoor motor and the air inlet amount of the air return inlet; and determining the dirty and blocked threshold according to the measurement data of the operating electrical parameter of the indoor motor and the measurement data of the air inlet amount of the air return inlet.

[0011] In a second aspect, the embodiments of the present application provide a fault detection device, applied to an air conditioner, the air conditioner comprising an indoor fan, the indoor fan comprising an indoor fan blade and an indoor motor, the indoor motor being configured to drive the indoor fan blade to rotate; the fault detection device comprising: a rotating speed calculation module configured to determine a set rotating speed range of the indoor motor according to a set wind speed of the indoor fan; a rotating speed comparison module configured to determine whether a running rotating speed of the indoor motor is within the set rotating speed range; a threshold comparison module configured to, when it is determined that the running rotating speed of the indoor motor is outside the set rotating speed range, determine whether a rotating speed adjustment frequency of the indoor motor is greater than a frequency threshold; a rotating speed adjustment module configured to, when it is determined that the rotating speed adjustment frequency of the indoor motor is less than or equal to the frequency threshold, control the indoor motor to perform a rotating speed adjustment once so that the running rotating speed of the indoor motor is within the set rotating speed range, and update the rotating speed adjustment frequency of the indoor motor; and a shutdown control module configured to, when it is determined that the rotating speed adjustment frequency of the indoor motor is greater than the frequency threshold, control the air conditioner to shut down.

[0012] In a third aspect, the embodiments of the present application provide an air conditioner, comprising: an indoor fan comprising an indoor fan blade and an indoor motor, the indoor motor being configured to drive the indoor fan blade to rotate; a memory storing a computer program; and a processor, the computer program being executed by the processor to implement the fault detection method according to any one of the above embodiments.

[0013] In a fourth aspect, the embodiments of the present application provide a computer readable storage medium, storing a computer program, the computer program being loaded by a processor to perform the steps of the fault detection method described above.

[0014] The fault detection method provided by the embodiments of the present application can accurately determine whether the air conditioner is dirty and blocked according to the running electrical parameter of the indoor motor and the dirty and blocked threshold, so as to clean the dirt in time when the air conditioner is dirty and blocked, so that the air conditioner returns to a clean state, and the efficient and clean operation requirements of the air conditioner are better met. BRIEF DESCRIPTION OF DRAWINGS

[0015] 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 any creative effort.

[0016] Figure 1 is a flowchart of the fault detection method provided by some embodiments of the present application; Figure 2is a partial flow chart of the fault detection method provided by some embodiments of the present application; Figure 3 is another partial flow chart of the fault detection method provided by some embodiments of the present application; Figure 4 is a parameter relationship diagram of the fault detection method provided by some embodiments of the present application; Figure 5 is still another partial flow chart of the fault detection method provided by some embodiments of the present application; Figure 6 is a structural diagram of the air conditioner provided by some embodiments of the present application.

[0017] Main element symbol explanation: 1-air conditioner, 10-processor, 20-memory. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0019] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements indicated thereby must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated thereby. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0020] "A and / or B" includes the following three combinations: only A, only B, and a combination of A and B.

[0021] The use of "applies to" or "configured to" in this application implies open and inclusive language, which does not exclude the applicability to or configuration to devices performing additional tasks or steps. Additionally, the use of "based on" implies openness and inclusivity, because processes, steps, calculations, or other actions "based on" one or more of the stated conditions or values ​​may in practice be based on additional conditions or values ​​beyond those stated.

[0022] In this application, the term "exemplary" is used to mean "used as an example, illustration, or description." Any embodiment described as "exemplary" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use this application. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that this application can be made without using these specific details. In other instances, well-known structures and processes are not described in detail to avoid obscuring the description of this application with unnecessary detail. Therefore, this application is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0023] like Figure 1 As shown, in a first aspect, embodiments of this application provide a fault detection method applied to an air conditioner 1. This fault detection method includes steps S10-S50, which can accurately and promptly detect the fault status of the indoor fan, thereby enabling timely control of the air conditioner to shut down and avoid hazards, ensuring the safe operation of the air conditioner.

[0024] The air conditioner 1 includes an indoor fan, which comprises indoor fan blades and an indoor motor. The indoor motor drives the indoor fan blades to rotate. The type of air conditioner 1 can be determined according to actual needs, and may be, for example, a wall-mounted air conditioner, a cabinet air conditioner, a window air conditioner, a ceiling-mounted air conditioner, etc. This application embodiment does not limit this type.

[0025] S10: Determine the set speed range of the indoor motor based on the set fan speed of the indoor fan.

[0026] Here, the set fan speed of the indoor fan can be set by the user through a control terminal such as a remote control, control panel, or smart terminal, or it can be automatically set by the air conditioner 1 according to the user's usage habits. This embodiment of the application does not limit this. Different set fan speeds have different set speed ranges. After determining the set fan speed, the set speed range of that set fan speed can be determined, thereby determining the set speed range of the indoor motor.

[0027] S20: Determine whether the operating speed of the indoor motor is within the set speed range.

[0028] Here, the running speed of the indoor motor can be measured in real time by a speed sensor arranged on the indoor motor, or can be determined in real time based on other related parameters.

[0029] S30: When it is determined that the running speed of the indoor motor is outside the set speed range, it is determined whether the speed adjustment frequency of the indoor motor is greater than a frequency threshold.

[0030] When it is determined that the running speed of the indoor motor is outside the set speed range, the indoor motor cannot drive the indoor fan blade to operate at a set wind level, and cannot meet the fan operation requirements of the air conditioner 1. At this time, the speed adjustment frequency of the indoor motor during the current operation of the air conditioner 1 can be obtained, and it is determined whether the speed adjustment frequency of the indoor motor is greater than a frequency threshold, to determine whether the indoor motor is temporarily not adjusted to the set speed range, or is unable to be adjusted to the set speed range due to various factors such as reaching a dangerous state of being unable to operate normally, or a fault of the indoor motor. Here, the frequency threshold can be pre-set in the control system of the air conditioner 1. The value of the frequency threshold can be determined according to actual needs, which is not limited by the embodiments of the present application. For example, the value of the frequency threshold can be 4-6 times, for example, 4, 5 or 6 times.

[0031] S40: When it is determined that the speed adjustment frequency of the indoor motor is less than or equal to the frequency threshold, the indoor motor is controlled to adjust the speed once to make the running speed of the indoor motor within the set speed range, and the speed adjustment frequency of the indoor motor is updated.

[0032] When it is determined that the speed adjustment frequency of the indoor motor is less than or equal to the frequency threshold, it can be determined that the indoor motor is temporarily not adjusted to the set speed range, and it is temporarily impossible to rule out various influencing factors such as the indoor motor reaching a dangerous state of being unable to operate normally, or a fault. At this time, the indoor motor can be controlled to adjust the speed once, and when the running speed of the indoor motor is greater than the upper limit value of the set speed range, the indoor motor is controlled to reduce the running speed by a target speed reduction amplitude, and when the running speed of the indoor motor is less than the lower limit value of the set speed range, the indoor motor is controlled to increase the running speed by a target speed increase amplitude, to adjust the running speed of the indoor motor to be within the set speed range.

[0033] After the indoor motor is adjusted in speed once, the number of speed adjustment of the indoor motor is increased by one, and the number of speed adjustment of the indoor motor is updated accordingly. Thereafter, S20 can be executed again to determine whether the running speed of the indoor motor is within the set speed range, and S30 is executed again when it is determined that the running speed of the indoor motor is outside the set speed range, and then S40 or S50 described below is executed accordingly to continue to adjust the speed of the indoor motor when the number of speed adjustment of the indoor motor is less than or equal to the adjustment threshold, or to control the air conditioner 1 to stop when it is greater than the adjustment threshold.

[0034] S50: When it is determined that the number of speed adjustment of the indoor motor is greater than the adjustment threshold, the air conditioner is controlled to stop.

[0035] When it is determined that the number of speed adjustment of the indoor motor is greater than the adjustment threshold, it can be determined that after the indoor motor is adjusted in speed for multiple times, the running speed of the indoor motor still cannot be adjusted to be within the set speed range. At this time, it can be determined that the indoor motor has failed, and the air conditioner 1 needs to be controlled to stop to avoid structural damage of the air conditioner 1 due to continued operation, effectively protecting the operation safety of the air conditioner 1.

[0036] As shown in FIG. 6, in some embodiments, the fault detection method can further include S60 to determine whether the air conditioner is dirty and blocked. Figure 2

[0037] S60: When it is determined that the running speed of the indoor motor is within the set speed range, it is determined whether the air conditioner is dirty and blocked according to the running electrical parameter of the indoor motor. The running electrical parameter includes at least one of the running voltage and the running current of the indoor motor.

[0038] When it is determined that the running speed of the indoor motor is within the set speed range, it can be determined that the indoor motor can drive the indoor fan blade to operate at a set wind speed, and can meet the fan operation requirement of the air conditioner 1, and the indoor motor has not failed. At this time, it can be further determined whether the air conditioner 1 is dirty and blocked.

[0039] Here, the running electrical parameter includes at least one of the running voltage and the running current of the indoor motor. In some examples, the running electrical parameter can adopt the running voltage of the indoor motor. In other examples, the running electrical parameter can adopt the running current of the indoor motor. In yet other examples, the running electrical parameter can adopt both the running voltage and the running current of the indoor motor.

[0040] As shown in FIG. 6, in some examples, S60 can include S61-S63. Figure 3

[0041] S61: Obtain the running electrical parameter of the indoor motor.

[0042] ​​Here, the operating voltage can be measured in real time by a voltage sensor arranged on the indoor motor, and the operating current can be measured in real time by a current sensor arranged on the indoor motor.

[0043] S62: Determine whether the operating electrical parameter of the indoor motor is greater than the dirty block threshold.

[0044] Here, the dirty block threshold and the operating electrical parameter correspond to be set, including at least one of a dirty block voltage threshold and a dirty block current threshold, for determining whether the air conditioner 1 is dirty blocked. The dirty block voltage threshold is used as a judgment threshold for the operating voltage of the indoor motor, and the dirty block current threshold is used as a judgment threshold for the operating current of the indoor motor. The dirty block threshold can be determined in advance according to, for example, experimental test data, historical operation data, etc., which is not limited in the embodiments of the present application. In some embodiments, the operating electrical parameter can adopt the operating voltage of the indoor motor, and accordingly, the dirty block threshold can adopt the dirty block voltage threshold. In other embodiments, the operating electrical parameter can adopt the operating current of the indoor motor, and accordingly, the dirty block threshold can adopt the dirty block current threshold. In still other embodiments, the operating electrical parameter can adopt both the operating voltage and the operating current of the indoor motor, and accordingly, the dirty block threshold can adopt both the dirty block voltage threshold and the dirty block current threshold.

[0045] Figure 4 The corresponding relationship between the operating electrical parameter of the indoor motor and the dirty block degree of the air conditioner 1 determined under different dirty block test conditions is shown. Among them, V0 is the operating voltage of the indoor motor, I0 is the operating current of the indoor motor; V max is the operating voltage of the indoor motor when the dirty block degree is the most serious, I max is the operating current of the indoor motor when the dirty block degree is the most serious; V min is the operating voltage of the indoor motor when not dirty blocked, I min is the operating current of the indoor motor when not dirty blocked. As Figure 4As shown, the inventor researches and finds that the dirty degree of the air conditioner 1 is positively correlated with the operating electrical parameter of the indoor motor. With the dirty degree of the air conditioner 1 gradually increasing, the air resistance of the air conditioner 1 gradually increases, so that the operating electrical parameter of the indoor motor when driving the indoor fan blade to operate at the set rotating speed gradually increases, and the set rotating speed of the indoor fan blade is consistent with the operating rotating speed of the indoor motor. The set rotating speed can be determined according to the set air volume, and the set air volume can be manually set by the user or automatically set by the air conditioner 1 according to the use habit of the user. When the dirty degree of the air conditioner 1 is light and has not reached the dirty state, the air resistance of the air conditioner 1 is small, and the operating electrical parameter of the indoor motor when driving the indoor fan blade to operate at the set rotating speed is small and less than or equal to the dirty threshold value, so that the air conditioner 1 can maintain a relatively efficient and clean operating state; when the dirty degree of the air conditioner 1 is relatively serious and has reached the dirty state, the air resistance of the air conditioner 1 is large, and the operating electrical parameter of the indoor motor when driving the indoor fan blade to operate at the set rotating speed is large and greater than the dirty threshold value, so that the dust and dirt accumulated in the air duct device such as the filter screen in the air conditioner 1 are relatively serious, which obviously reduces the air inlet amount of the air conditioner 1 and significantly interferes with the normal operation of the air conditioner 1.

[0046] S63: determining that the air conditioner 1 is dirty when it is determined that the operating electrical parameter of the indoor motor is greater than the dirty threshold value.

[0047] In some embodiments, the air conditioner 1 can be determined to be dirty when it is determined that the operating voltage of the indoor motor is greater than the dirty voltage threshold value. In other embodiments, the air conditioner 1 can be determined to be dirty when it is determined that the operating current of the indoor motor is greater than the dirty current threshold value. In still other embodiments, the air conditioner 1 can be determined to be dirty when it is determined that the operating voltage of the indoor motor is greater than the dirty voltage threshold value and the operating current of the indoor motor is greater than the dirty current threshold value.

[0048] Compared with the related art, the fault detection method provided in the embodiments of the present application can accurately determine whether the air conditioner 1 is dirty according to the operating electrical parameter of the indoor motor and the dirty threshold value, so as to clean the dirt in time when the air conditioner 1 is dirty, restore the air conditioner 1 to a clean state, and better meet the efficient and clean operation requirements of the air conditioner 1.

[0049] As shown in FIG. 6, in some embodiments, after S63, S60 can include S64-S65. Figure 5

[0050] S64: determining whether the operating electrical parameter of the indoor motor is greater than the dangerous threshold value.

[0051] ​Here, the dangerous threshold value and the operating electrical parameter correspondingly set, including at least one of a dangerous voltage threshold value and a dangerous current threshold value, the dangerous voltage threshold value being used as a judgment threshold value of an operating voltage of the indoor motor, and the dangerous current threshold value being used as a judgment threshold value of an operating current of the indoor motor. The dangerous threshold value is greater than the dirty block threshold value, and is used to further judge whether the air conditioner 1 has reached a dangerous state of being unable to normally operate when the air conditioner 1 has the dirty block. The dangerous threshold value can be determined in advance according to, for example, experimental test data, historical operation data, etc., which is not limited in the embodiments of the present application.

[0052] In some embodiments, the operating electrical parameter can adopt an operating voltage of the indoor motor, and correspondingly, the dirty block threshold value can adopt a dirty block voltage threshold value, and the dangerous threshold value can adopt a dangerous voltage threshold value, the dangerous voltage threshold value being greater than the dirty block voltage threshold value. In other embodiments, the operating electrical parameter can adopt an operating current of the indoor motor, and correspondingly, the dirty block threshold value can adopt a dirty block current threshold value, and the dangerous threshold value can adopt a dangerous current threshold value, the dangerous current threshold value being greater than the dirty block current threshold value. In still other embodiments, the operating electrical parameter can simultaneously adopt an operating voltage and an operating current of the indoor motor, and correspondingly, the dirty block threshold value can adopt a dirty block voltage threshold value and a dirty block current threshold value, and the dangerous threshold value can adopt a dangerous voltage threshold value and a dangerous current threshold value, the dangerous voltage threshold value being greater than the dirty block voltage threshold value, and the dangerous current threshold value being greater than the dirty block current threshold value.

[0053] S65: when it is determined that the operating electrical parameter of the indoor motor is greater than the dangerous threshold value, controlling the air conditioner 1 to stop.

[0054] When the operating electrical parameter of the indoor motor is greater than the dangerous threshold value, it can be determined that the air conditioner 1 has the dirty block and has reached a dangerous state of being unable to normally operate. At this time, the air conditioner 1 can be immediately controlled to stop, avoiding structural damage of the air conditioner 1 due to continued operation.

[0055] By setting S64-S65, the embodiments of the present application can further judge whether the air conditioner 1 has reached a dangerous state of being unable to normally operate when the air conditioner 1 has the dirty block, and immediately control the air conditioner 1 to stop when it is determined that the dangerous state has been reached, avoiding structural damage of the air conditioner 1 due to continued operation, and effectively protecting the operation safety of the air conditioner 1.

[0056] In some examples, after the air conditioner 1 is controlled to stop according to S65, the fault detection method can include S70.

[0057] S70: controlling the air conditioner 1 to alarm.

[0058] Here, the air conditioner 1 can alarm in different ways such as sound alarm, light alarm, image display alarm, etc., to remind the user to maintain and repair the air conditioner 1, so that the air conditioner 1 can be restored to a normal operating state as soon as possible.

[0059] In some embodiments, after S60 or S63, the fault detection method can comprise S603.

[0060] S603: controlling the air conditioner 1 to display a dirty blockage warning information.

[0061] Here, the dirty blockage warning information can comprise at least one of a sound warning information, a light warning information, an image display warning information, etc., to remind the user to clean the air conditioner 1 in advance, so as to make the air conditioner 1 recover to a clean state in advance, and avoid the air conditioner 1 further dirtying to a dangerous state of being unable to operate normally.

[0062] In some embodiments, before S62, the fault detection method can comprise S001-S003.

[0063] S001: setting filter screens of different layers at the return air inlet of the air conditioner 1 to form a plurality of dirty blockage simulation scenarios.

[0064] The inventors have found that different dirty blockage degrees can be simulated by filter screens of different layers. In some examples, the environment state when the air conditioner 1 has not been dirty can be simulated by one layer of filter screen or two layers of filter screen, the environment state when the air conditioner 1 has been dirty and different dirty blockage degrees can be simulated by three layers of filter screen or four layers of filter screen, and the dangerous state of the air conditioner 1 being dirty to the extent of being unable to operate normally can be simulated by five layers of filter screen.

[0065] S002: controlling the air conditioner 1 to operate under the plurality of dirty blockage simulation scenarios, and measuring the operating electrical parameters of the indoor motor and the air inlet volume of the return air inlet.

[0066] By controlling the air conditioner 1 to operate under the plurality of dirty blockage simulation scenarios, and measuring the operating electrical parameters of the indoor motor under different dirty blockage simulation scenarios and the air inlet volume of the return air inlet under different dirty blockage simulation scenarios, the measurement data of the operating electrical parameters of the indoor motor and the measurement data of the air inlet volume of the return air inlet under the plurality of dirty blockage simulation scenarios can be obtained.

[0067] S003: determining a dirty blockage threshold value according to the measurement data of the operating electrical parameters of the indoor motor and the measurement data of the air inlet volume of the return air inlet.

[0068] According to the measurement data of the operating electrical parameters of the indoor motor and the measurement data of the air inlet volume of the return air inlet, the corresponding relationship between the operating electrical parameters of the indoor motor and the air inlet volume of the return air inlet can be determined by statistical methods such as fitting algorithms, and then the corresponding relationship between the operating electrical parameters of the indoor motor and the air resistance of the air conditioner 1 can be determined, and then the corresponding relationship between the operating electrical parameters of the indoor motor and the dirty state of the air conditioner 1 can be determined. According to the corresponding relationship between the operating electrical parameters of the indoor motor and the dirty state of the air conditioner 1, the dirty blockage threshold value can be determined, and the dangerous threshold value can be further determined.

[0069] The embodiments of the present application can accurately determine the dirty block threshold and the dangerous threshold of the air conditioner 1 in advance through simulation testing, so as to accurately determine the dirty block risk of the air conditioner 1 according to the dirty block threshold and the dangerous threshold of the air conditioner 1.

[0070] In a second aspect, the embodiments of the present application provide a fault detection device, which comprises: a rotation speed calculation module configured to determine a set rotation speed range of an indoor motor according to a set air volume of an indoor fan; a rotation speed comparison module configured to determine whether a running rotation speed of the indoor motor is located in the set rotation speed range; a threshold comparison module configured to determine whether a rotation speed adjustment frequency of the indoor motor is greater than a frequency threshold when it is determined that the running rotation speed of the indoor motor is located outside the set rotation speed range; a rotation speed adjustment module configured to control the indoor motor to perform a rotation speed adjustment once to make the running rotation speed of the indoor motor located in the set rotation speed range and update the rotation speed adjustment frequency of the indoor motor when it is determined that the rotation speed adjustment frequency of the indoor motor is less than or equal to the frequency threshold; and a shutdown control module configured to control the air conditioner to shut down when it is determined that the rotation speed adjustment frequency of the indoor motor is greater than the frequency threshold.

[0071] As shown in Figure 6 In a third aspect, the embodiments of the present application provide an air conditioner 1, which comprises an indoor fan, a processor 10 and a memory 20. The indoor fan comprises an indoor fan blade and an indoor motor, the indoor motor is used to drive the indoor fan blade to rotate, and the memory 20 stores a computer program, the computer program is executed by the processor 10 to implement the fault detection method of any one of the above embodiments. The type of the air conditioner 1 can be determined according to actual needs, which can be, for example, a wall-mounted air conditioner, a cabinet air conditioner, a window air conditioner, a ceiling machine, etc., and the embodiments of the present application do not limit this.

[0072] The processor 10 is connected to the memory 20 and can perform various actions and processes according to the program stored in the memory 20. Specifically, the processor 10 can be an integrated circuit chip with signal processing capability. The above processor 10 can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a ready-to-program gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, and can implement or execute the disclosed methods, steps and logic block diagrams in the embodiments of the present application. The general-purpose processor can be a microprocessor or any conventional processor, etc., which can be of X86 architecture or ARM architecture.

[0073] The memory 20 can be volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. Nonvolatile memory can be read only memory (ROM), programmable ROM (PROM), erasable programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory can be random access memory (RAM), which acts as external cache. By way of example and not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), Synchlink dynamic random access memory (SLDRAM), and direct Rambus random access memory (DRRAM). Note that the memory 20 of the methods described herein is intended to include, without being limited to, these and any other suitable types of memory.

[0074] In a fourth aspect, the embodiments of the present application provide a computer readable storage medium, having stored thereon a computer program, the computer program being loaded by the processor 10 to execute the steps in the control method of any of the above embodiments.

[0075] By way of example, and not limitation, such computer-readable storage media can include volatile memory, non-volatile memory, hard disks, solid state drives, compact discs (CDs), digital versatile discs (DVDs), and the like. The computer-readable storage medium can also be distributed over network-coupled or the storage devices, such as through a stand-alone system or a distributed system of systems. The computer-readable storage medium can be embodied in a computer program product. By way of example, and not limitation, a computer program product can include a computer-readable storage medium in packaging materials. Programs, such as programs of instructions, can be written in any of various high-level languages, including an object-oriented programming language such as Java, and can be executed in a virtual machine or an interpreter.

[0076] The above describes in detail the fault detection method, device, air conditioner and computer readable storage medium provided by the embodiments of the present application. The principles and implementation manners of the present application are described by applying specific examples in this paper. The above embodiment is only used to help understand the method and core idea of the present application. Meanwhile, according to the idea of the present application, the specific implementation manner and application range will be changed by the person skilled in the art. In summary, the content of the specification should not be understood as the limitation of the present application.

Claims

1. A fault detection method, characterized in that, The invention is applied to an air conditioner, the air conditioner including an indoor fan, the indoor fan including indoor fan blades and an indoor motor, the indoor motor being used to drive the indoor fan blades to rotate; The fault detection method includes: The set speed range of the indoor motor is determined based on the set fan speed of the indoor fan; Determine whether the operating speed of the indoor motor is within the set speed range; When it is determined that the operating speed of the indoor motor is outside the set speed range, it is determined whether the number of speed adjustments of the indoor motor is greater than the adjustment number threshold. When it is determined that the number of speed adjustments of the indoor motor is less than or equal to the adjustment number threshold, the indoor motor is controlled to perform a speed adjustment once so that the operating speed of the indoor motor is within the set speed range, and the number of speed adjustments of the indoor motor is updated. When it is determined that the number of speed adjustments of the indoor motor exceeds the adjustment number threshold, the air conditioner is controlled to stop.

2. The fault detection method according to claim 1, characterized in that, The fault detection method includes: When it is determined that the operating speed of the indoor motor is within the set speed range, the air conditioner is determined to be dirty or clogged based on the operating electrical parameters of the indoor motor. The operating electrical parameters include at least one of the operating voltage and operating current of the indoor motor.

3. The fault detection method according to claim 2, characterized in that, Determining whether the air conditioner is clogged based on the operating electrical parameters of the indoor motor includes: Obtain the operating electrical parameters of the indoor motor; Determine whether the operating electrical parameters of the indoor motor are greater than the dirt blockage threshold, wherein the dirt blockage threshold includes at least one of the dirt blockage voltage threshold and the dirt blockage current threshold; When the operating electrical parameters of the indoor motor are determined to be greater than the dirt blockage threshold, the air conditioner is determined to be dirty and clogged.

4. The fault detection method according to claim 3, characterized in that, After determining that the air conditioner is dirty or clogged, the fault detection method includes: Determine whether the operating electrical parameters of the indoor motor are greater than a danger threshold, wherein the danger threshold includes at least one of a danger voltage threshold and a danger current threshold, and the danger threshold is greater than the dirt and blockage threshold; When the operating electrical parameters of the indoor motor are determined to be greater than the danger threshold, the air conditioner is controlled to shut down.

5. The fault detection method according to claim 4, characterized in that, When controlling the air conditioner to stop, the fault detection method includes: Control the air conditioner to sound an alarm.

6. The fault detection method according to claim 2 or 3, characterized in that, After determining that the air conditioner is dirty or clogged, the fault detection method includes: Control the air conditioner to display a dirt / clogging warning message.

7. The fault detection method according to claim 3, characterized in that, Before determining whether the operating electrical parameters of the indoor motor exceed the dirt / clogging threshold, the fault detection method includes: Different layers of filters are installed at the return air vent of the air conditioner to create multiple simulated dirt scenarios; The air conditioner is controlled to operate under multiple simulated dirty scenarios, and the operating electrical parameters of the indoor motor and the air intake volume of the return air vent are measured. The dirt and clogging threshold is determined based on the measurement data of the operating electrical parameters of the indoor motor and the measurement data of the air intake of the return air vent.

8. A fault detection device, characterized in that, The invention is applied to an air conditioner, the air conditioner including an indoor fan, the indoor fan including indoor fan blades and an indoor motor, the indoor motor being used to drive the indoor fan blades to rotate; The fault detection device includes: The speed calculation module is configured to determine the set speed range of the indoor motor based on the set fan speed of the indoor fan; The speed comparison module is configured to determine whether the operating speed of the indoor motor is within the set speed range; The threshold comparison module is configured to determine whether the number of speed adjustments of the indoor motor is greater than the adjustment number threshold when it is determined that the operating speed of the indoor motor is outside the set speed range; The speed adjustment module is configured to control the indoor motor to perform a speed adjustment once when it is determined that the number of speed adjustments of the indoor motor is less than or equal to the adjustment number threshold, so that the operating speed of the indoor motor is within the set speed range, and update the number of speed adjustments of the indoor motor. The shutdown control module is configured to control the air conditioner to shut down when it is determined that the number of speed adjustments of the indoor motor is greater than a threshold number.

9. An air conditioner, characterized in that, include: An indoor fan includes indoor fan blades and an indoor motor, wherein the indoor motor is used to drive the indoor fan blades to rotate; Memory, which stores computer programs; A processor, wherein the computer program, when executed by the processor, implements the fault detection method as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, It stores a computer program, which is loaded by a processor to execute the steps of the fault detection method according to any one of claims 1 to 7.

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