Air conditioner indoor unit plugging identification method and device and air conditioner

Abstract

The application belongs to the technical field of air conditioners, and particularly relates to a plugging identification method and device of an air conditioner indoor unit and an air conditioner. The plugging identification method of the air conditioner indoor unit comprises the following steps: acquiring an ambient temperature, a rotating speed of a motor of the air conditioner indoor unit and an actual voltage output value of the motor; determining a preset voltage output value of the motor according to the ambient temperature and the rotating speed of the motor; determining an actual difference value of voltage output of the motor according to the actual voltage output value and the preset voltage output value; and determining a plugging condition of a filter screen of the air conditioner indoor unit according to the actual difference value. The plugging identification method of the air conditioner indoor unit provided in the application can accurately determine the plugging condition of the filter screen, and a user can determine whether to clean or replace the filter screen according to the plugging condition of the filter screen, thereby improving the use experience of the user.

Description

Technical Field

[0001] This application belongs to the field of air conditioning technology, specifically relating to a method, device and air conditioner for identifying blockages in an indoor unit of an air conditioner. Background Technology

[0002] Air conditioning uses refrigerant to exchange heat with air to achieve air conditioning. The indoor unit of an air conditioner has an air inlet with a filter to remove dust and other airborne particles. However, after prolonged use, the filter can become clogged with dust and debris, leading to a decrease in the airflow into the indoor unit.

[0003] In existing technologies, a target time is typically set during the installation of the indoor air conditioning unit. The running time of the indoor unit and the target time are used to determine the degree of dirt clogging on the filter. After the indoor unit has run for the target time, it is determined that there is significant dirt clogging on the filter, prompting the user to clean it. The target time is usually determined based on the usage environment and experience.

[0004] However, the running time and target time of the indoor unit of the air conditioner cannot accurately determine the degree of dirt and clogging of the filter, which affects the user experience. Summary of the Invention

[0005] This application provides a method, device, and air conditioner for identifying filter blockage in an indoor air conditioner, in order to solve the problem that the operating time and target time of the indoor air conditioner cannot accurately determine the filter blockage, thus affecting the user experience.

[0006] In a first aspect, this application provides a method for identifying blockages in an air conditioner indoor unit, the method comprising:

[0007] The ambient temperature, the speed of the motor in the indoor unit of the air conditioner, and the actual voltage output value of the motor are obtained.

[0008] The preset voltage output value of the motor is determined based on the ambient temperature and the motor speed.

[0009] The actual difference between the actual voltage output value and the preset voltage output value is determined.

[0010] Based on the actual difference, the blockage status of the filter screen of the indoor unit of the air conditioner is determined.

[0011] In one possible implementation, determining the preset voltage output value of the motor based on the ambient temperature and the motor speed includes:

[0012] The initial voltage output value of the motor is determined based on the ambient temperature and the motor speed.

[0013] The preset voltage output value is determined based on the initial voltage output value and the correction constant.

[0014] In one possible implementation, determining the preset voltage output value based on the initial voltage output value and the correction constant includes:

[0015] The correction constant is obtained after the initial installation of the indoor unit of the air conditioner, after a change in the operating environment of the indoor unit of the air conditioner, or after the filter is cleaned;

[0016] The preset voltage output value is obtained by summing the initial voltage output value and the correction constant.

[0017] In one possible implementation, obtaining the correction constant after the initial installation of the indoor unit, a change in the operating environment of the indoor unit, or cleaning of the filter includes:

[0018] After the initial installation of the indoor unit of the air conditioner, after a change in the operating environment of the indoor unit of the air conditioner, or after cleaning the filter, the current ambient temperature, the speed of the motor at its highest setting, and the installation voltage output value of the motor at its highest setting under the current ambient temperature are obtained.

[0019] The initial voltage output value of the motor is determined based on the current ambient temperature and the motor speed at its highest gear.

[0020] The correction constant is determined based on the installed voltage output value and the initial voltage output value, wherein the correction constant is the difference between the installed voltage output value and the initial voltage output value.

[0021] In one possible implementation, determining the clogging status of the air conditioner indoor unit's filter based on the actual difference includes:

[0022] Determine a preset difference range of the motor's voltage output under multiple different blockage conditions of the filter screen;

[0023] Based on the actual difference, determine the preset difference range corresponding to the actual difference, and the blocking situation corresponding to the preset difference range.

[0024] In one possible implementation, the air conditioner indoor unit blockage identification method provided in this application further includes:

[0025] Based on the set blockage status indication value, determine the setting difference of the motor corresponding to the blockage status indication value;

[0026] If the actual difference is greater than or equal to the set difference, a filter cleaning prompt will be issued.

[0027] In one possible implementation, the air conditioner indoor unit blockage identification method provided in this application further includes:

[0028] If the current actual difference is greater than or equal to the actual difference when the indoor unit of the air conditioner was last turned on, a foreign object blockage alarm will be issued.

[0029] Secondly, this application provides a device for identifying blockages in an air conditioner indoor unit, comprising:

[0030] The acquisition module is used to acquire the ambient temperature, the speed of the motor of the indoor unit of the air conditioner, and the actual voltage output value of the motor;

[0031] The determining module is used to determine the preset voltage output value of the motor based on the ambient temperature and the motor speed;

[0032] The determining module is further configured to determine the actual difference in voltage output of the motor based on the actual voltage output value and the preset voltage output value;

[0033] The determining module is also used to determine the clogging status of the filter screen of the indoor unit of the air conditioner based on the actual difference.

[0034] Thirdly, this application provides an air conditioner, comprising:

[0035] The memory stores computer-executed instructions;

[0036] A processor, which is communicatively connected to the memory, executes computer execution instructions stored in the memory to implement the blocking identification method for any of the air conditioning indoor units in the first aspect described above.

[0037] Fourthly, this application provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, are used to implement the blocking identification method for any of the air conditioning indoor units described in the first aspect.

[0038] The air conditioner indoor unit blockage identification method, device, and air conditioner provided in this application determine the preset voltage output value of the motor by using ambient temperature and motor speed, and determine the actual voltage output difference of the motor by comparing the actual voltage output value with the preset voltage output value. The actual difference determines the change in the load borne by the motor, thereby more accurately judging the blockage of the filter. Users can determine whether to clean or replace the filter based on the blockage condition, improving the user experience. Attached Figure Description

[0039] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0040] Figure 1 This is a schematic diagram of the structure of an indoor air conditioning unit in the prior art;

[0041] Figure 2 The flowchart of the air conditioner indoor unit blockage identification method provided in the embodiments of this application Figure 1 ;

[0042] Figure 3 The flowchart of the air conditioner indoor unit blockage identification method provided in the embodiments of this application Figure 2 ;

[0043] Figure 4 The flowchart of the air conditioner indoor unit blockage identification method provided in the embodiments of this application Figure 3 ;

[0044] Figure 5 A schematic diagram of the structure of the air conditioner indoor unit blocking identification device provided in the embodiments of this application;

[0045] Figure 6 This is a schematic diagram of the hardware structure of an air conditioner provided in an embodiment of this application.

[0046] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0048] Figure 1 This is a schematic diagram of the structure of an indoor air conditioning unit in the prior art. (Example:) Figure 1As shown, the indoor unit 100 of the air conditioner includes a housing 110, a filter 120, a motor 130, a fan 140, and a heat exchanger 150. The filter 120, motor 130, fan 140, and heat exchanger 150 are all housed within the housing 110. The housing 110 has an air inlet and an air outlet. Indoor air enters the housing 110 through the air inlet, and after heat exchange by the heat exchanger 150, it is delivered to the room through the air outlet. The filter 120 covers the air inlet to filter dust and floating particles in the indoor air entering the housing 110 through the air inlet, preventing dust and floating particles from entering the housing 110 and clogging the fan 140 or the heat exchanger 150. The motor 130 drives the fan 140 to rotate, so as to draw indoor air into the housing 110 through the air inlet, and send the air after heat exchange by the heat exchanger 150 out of the housing 110 through the air outlet. At the same time, it can adsorb dust and floating objects in the air onto the filter 120.

[0049] After prolonged use, dust and floating debris will accumulate on the filter 120, causing it to partially block the filter 120. This reduces the air intake area of ​​the filter 120, decreases the air intake volume of the air conditioner indoor unit 100, and affects the cleanliness of the indoor air. Consequently, the quality of the air delivered to the room through the air conditioner indoor unit 100 deteriorates, and the motor 130 will operate under a higher load, affecting its lifespan.

[0050] In existing technologies, a target time is typically set during the installation of the indoor unit 100 of the air conditioner. The running time of the indoor unit 100 and the target time are used to determine the degree of dirt clogging on the filter. Specifically, a fixed target time is set during the installation of the indoor unit 100. After the cumulative running time of the indoor unit 100 reaches the target time, if it is determined that there is significant dirt clogging on the filter, the user can be reminded to clean the filter 120 via the display panel or indicator light of the indoor unit 100. The target time is usually determined by the installer based on the usage environment and experience. However, the usage scenarios of air conditioner indoor units are varied, and the accuracy of determining the target time based on the usage environment and experience is poor. Using the running time and target time of the indoor unit cannot accurately determine the degree of dirt clogging on the filter 120, resulting in inaccurate reminders to the user for filter cleaning. These reminders may be delayed or premature, affecting the user experience.

[0051] Based on this, this application provides a method for identifying filter blockage in an indoor air conditioner unit. The method determines the preset voltage output value of the motor by using the ambient temperature and motor speed, and determines the actual voltage output difference between the actual voltage output value and the preset voltage output value. The actual difference is used to determine the change in the load on the motor, thereby more accurately judging the filter blockage. Users can determine whether to clean or replace the filter based on the filter blockage, thus improving the user experience.

[0052] The technical solutions of this application and how they solve the aforementioned technical problems are described in detail below with specific embodiments. These specific embodiments may exist independently or in combination with each other. Identical or similar concepts or processes may not be repeated in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0053] Figure 2 The flowchart of the air conditioner indoor unit blockage identification method provided in the embodiments of this application Figure 1 .like Figure 2 As shown, the air conditioner indoor unit blockage identification method provided in this embodiment includes:

[0054] S201: Obtain the ambient temperature T, the speed F of the motor of the indoor unit of the air conditioner, and the actual voltage output value Us of the motor.

[0055] The actual voltage output value Us refers to the measured voltage output value of the motor when the indoor unit of the air conditioner is in use. The ambient temperature T is approximately equal to the inlet air temperature of the indoor unit, which refers to the temperature at the air inlet of the indoor unit. The ambient temperature T can be obtained by measuring a temperature sensor. The motor has at least two speed settings, each corresponding to a different speed. The motor speed F can be the speed corresponding to the current speed setting. Alternatively, the motor speed F can be obtained through measurement.

[0056] The voltage output value refers to the motor's PWM value. PWM (Pulse Width Modulation) refers to the use of a microprocessor's digital output to control analog circuits. PWM simulates different voltage levels by rapidly switching the power supply's on and off states; that is, it changes the duty cycle of the high-level time within a fixed period, which is the on-time. Air conditioner indoor units typically use a brushless DC motor to drive the fan, drawing air into the unit or expelling heated air. During motor operation, adjusting the PWM duty cycle changes the motor's average voltage, thereby controlling the motor's speed.

[0057] S202: Determine the preset voltage output value Ux of the motor based on the ambient temperature T and the motor speed F.

[0058] The motor's voltage output value is affected by the heat exchanger resistance, ambient temperature T, filter clogging status, fan size, and motor speed F. The motor's preset voltage output value Ux refers to the motor's voltage output value when the filter is not clogged.

[0059] S203: Determine the actual voltage output difference △U of the motor based on the actual voltage output value Us and the preset voltage output value Ux.

[0060] The actual voltage output difference ΔU of the motor is the difference between the actual voltage output value Us and the preset voltage output value Ux, that is: ΔU=Us-Ux.

[0061] S204: Determine the blockage status of the filter screen of the indoor unit of the air conditioner based on the actual difference △U.

[0062] When the filter becomes clogged with dust and floating debris, the load on the fan increases, leading to increased torque on the motor. To maintain the target speed, the motor needs to overcome greater torque, requiring a higher voltage output. Therefore, by detecting the change in the PWM signal—the change in voltage output, or the actual difference ΔU—the change in the motor's load can be determined. This change in load can then be used to determine the degree of filter clogging; a larger ΔU indicates a larger clogged area on the filter.

[0063] The air conditioner indoor unit blockage identification method provided in this application determines the preset voltage output value Ux of the motor by using the ambient temperature T and the motor speed F, and determines the actual voltage output difference ΔU of the motor by using the actual voltage output value Us and the preset voltage output value Ux. The actual difference ΔU determines the change in the load borne by the motor, and at the same time, the change in the torque borne by the motor can be determined. Thus, the blockage of the filter can be judged more accurately. Users can determine whether to clean or replace the filter based on the blockage of the filter, improving the user experience.

[0064] Figure 3 The flowchart of the air conditioner indoor unit blockage identification method provided in the embodiments of this application Figure 2 The air conditioner indoor unit blockage identification method provided in this embodiment includes:

[0065] S301: Obtain the correction constant B1, ambient temperature T, motor speed F of the indoor unit of the air conditioner, and actual voltage output value Us of the motor.

[0066] The explanations for obtaining the ambient temperature T, the motor speed F, and the actual voltage output value Us of the motor are similar to those in step S201, and will not be repeated here.

[0067] After the initial installation of the indoor unit of the air conditioner or after changes in the operating environment of the indoor unit, the voltage output value of the motor when the filter is unblocked may deviate from the initial voltage output value U0 calibrated at the factory due to the influence of the air inlet and outlet. It is necessary to obtain a correction constant B1 to correct the initial voltage output value U0. Even after cleaning the filter, the voltage output value of the motor when the filter is unblocked may still deviate from the initial voltage output value U0 calibrated at the factory. Again, it is necessary to obtain a correction constant B1 to correct the initial voltage output value U0. That is, based on the initial voltage output value U0 and the correction constant B1, the preset voltage output value Ux is determined.

[0068] Specifically, after the initial installation of the indoor unit, changes in the operating environment, or after cleaning the filter (provided the filter is clean and unblocked, and the surrounding environment is in a normal operating condition), pressing and holding the fan speed button for five seconds will activate the motor PWM self-correction control. For ceiling-mounted air conditioners, a normal operating environment means the ceiling and air intake grille are installed. Motor PWM self-correction refers to using the correction constant B1 to correct the initial voltage output value U0.

[0069] After the indoor unit of the air conditioner enters the motor PWM self-correction control, the indoor unit automatically obtains the current ambient temperature Ta, the motor speed Fa when it is at the highest gear, and the installation voltage output value Ua when the motor is at the highest gear. It also obtains the initial voltage output value U0 of the motor corresponding to the motor speed Fa when it is at the highest gear. Based on the installation voltage output value Ua and the initial voltage output value U0, the correction constant B1 is determined. The correction constant B1 is the difference between the installation voltage output value Ua and the initial voltage output value U0, that is, B1 = Ua - U0.

[0070] The current ambient temperature Ta, the motor speed Fa at its highest gear, and the motor's installation voltage output value Ua at the current ambient temperature Ta and the highest gear can all be obtained through measurement. When the filter is not clogged, the initial motor voltage output value U0 can be calculated using the following formula:

[0071] The initial voltage output value U0 = K1 × current ambient temperature Ta + K2 × motor speed Fa + B when it is in the highest gear.

[0072] It should be noted that when the operating environment of the indoor air conditioner unit changes, such as during renovation of the room where the unit is installed, alteration of the air duct, or after cleaning the filter, motor PWM self-correction is required to redetermine the correction constant B1. During motor PWM self-correction, the filter must be clean, i.e., unblocked.

[0073] S302: Determine the initial voltage value U0 of the motor based on the ambient temperature T and the motor speed F.

[0074] The initial voltage output value of the motor refers to the voltage output value of the motor before the indoor unit of the air conditioner leaves the factory, and when the filter is not blocked.

[0075] The initial voltage output value U0 of the motor is related to the ambient temperature T and the motor speed F. Specifically, the initial voltage output value U0 of the motor can be determined by the following formula:

[0076] The initial voltage output value U0 = first coefficient K1 × ambient temperature T + second coefficient K2 × motor speed F + B.

[0077] Where B is a constant. Before the indoor unit of the air conditioner leaves the factory, the selection of the heat exchanger, fan, and motor is determined to ensure that the resistance of the heat exchanger and the size of the fan remain constant. Then, under different ambient temperatures T and different motor speeds F, the initial voltage output value U0 of the motor is measured, and the first coefficient K1, the second coefficient K2, and B are obtained by fitting the formula.

[0078] Specifically, the ambient temperature T range can be the typical indoor temperature range, i.e., 5℃-35℃. Each 5℃ interval serves as a calibration point. The motor speed F is determined using the speed F corresponding to different fan speed settings in the design, with each setting serving as a calibration point. Then, the initial voltage output value U0 corresponding to different ambient temperatures T and different motor speeds F with constant motor speed F is measured using the single-variable method. Finally, the first coefficient K1, the second coefficient K2, and B are obtained through formula fitting, thus revealing the relationship between the initial voltage output value U0, ambient temperature T, and motor speed F before the air conditioner indoor unit leaves the factory, assuming the filter is not clogged.

[0079] S303: Determine the preset voltage output value Ux of the motor based on the initial voltage output value U0 and the correction constant B1.

[0080] The preset voltage output value Ux is the motor voltage output value when the filter is not clogged. The preset voltage output value Ux is the sum of the initial voltage output value U0 and the correction constant B1, i.e.: Ux = U0 + B1. Furthermore, the preset voltage output value Ux can be calculated using the following formula:

[0081] The preset voltage output value Ux = K1 × ambient temperature T + K2 × motor speed F + B + B1.

[0082] S304: Determine the actual voltage output difference △U of the motor based on the actual voltage output value Us and the preset voltage output value Ux.

[0083] Wherein, the actual difference ΔU is the difference between the actual voltage output value Us and the preset voltage output value Ux, that is: ΔU = Us - Ux. Therefore, the actual voltage difference ΔU of the motor can be calculated using the following formula:

[0084] Actual difference △U = Actual voltage output value Us - First coefficient K1 × Ambient temperature T - Second coefficient K2 × Motor speed FB - B1.

[0085] S305: Determines the preset difference range of motor voltage output when the filter is in multiple different blockage conditions.

[0086] Before the indoor unit of the air conditioner leaves the factory, multiple different blockage conditions can be simulated on the filter screen, and the preset difference range of the motor voltage output corresponding to each blockage condition can be obtained.

[0087] For example, manual clogging can be simulated on the filter screen. For instance, a matrix method can be used to partially block the filter screen to simulate clogging. Specifically, 1 / 4, 1 / 2, and 3 / 4 of the filter screen can be blocked sequentially, and the voltage output values ​​U1, U2, and U3 under each simulated clogging condition, along with the preset voltage output value U0 corresponding to the ambient temperature and motor speed, can be obtained. Finally, the preset differences ΔU1, ΔU2, and ΔU3 under each simulated clogging condition can be calculated, where ΔU1 = U1 - U0, ΔU2 = U2 - U0, and ΔU3 = U3 - U0. The preset difference range refers to the interval formed between two adjacent preset differences when the preset differences are arranged in descending or ascending order.

[0088] S306: Based on the actual difference, determine the preset difference range corresponding to the actual difference, and the blocking situation corresponding to the preset difference range.

[0089] The blockage status corresponding to the preset difference range is the blockage status of the filter.

[0090] Understandably, the more preset differences there are, and the more preset difference intervals there are, the higher the accuracy of determining the filter blockage status of the indoor unit of the air conditioner through the actual difference ΔU and each preset difference interval.

[0091] For example, if the actual difference is less than or equal to △U1, it indicates that the actual blocking area of ​​the filter is less than or equal to 1 / 4 of the filter; if the actual difference is less than or equal to △U2 and greater than △U1, it indicates that the actual blocking area of ​​the filter is greater than 1 / 4 of the filter and less than or equal to 1 / 2 of the filter; if the actual difference is less than or equal to △U3 and less than △U2, it indicates that the actual blocking area of ​​the filter is greater than 1 / 2 of the filter and less than or equal to 3 / 4 of the filter; if the actual difference is greater than △U3, it indicates that the actual blocking area of ​​the filter is greater than 3 / 4 of the filter.

[0092] The air conditioner indoor unit blockage identification method provided in this application embodiment obtains the actual difference value △U and compares the actual difference value △U with each preset difference value interval, thereby determining the preset difference value interval corresponding to the actual difference value △U and determining the blockage situation corresponding to the preset difference value interval. The blockage situation corresponding to the preset difference value interval is the blockage situation of the filter, thereby accurately determining the current filter blockage situation.

[0093] In some embodiments, after determining the preset difference in the voltage output of the motor under multiple different clogging conditions of the filter screen, the preset difference closest to the actual difference can be determined by comparing the actual difference with the preset difference. The clogging condition corresponding to the preset difference is the clogging condition of the filter screen.

[0094] Figure 4 The flowchart of the air conditioner indoor unit blockage identification method provided in the embodiments of this application Figure 3 .like Figure 4 As shown in the embodiments of this application, the method for identifying blockages in an air conditioning indoor unit further includes:

[0095] S401: Based on the set blockage status indication value, determine the set difference of the motor voltage output corresponding to the blockage status indication value.

[0096] The blocking status indicator can be set by the user according to their needs.

[0097] For example, the user-defined clogging status prompt values ​​may include: prompts for slight clogging, moderate clogging, and heavy clogging. The preset difference for slight clogging can be a preset difference △U1 corresponding to a clogging area of ​​1 / 4 of the filter; the preset difference for moderate clogging can be a preset difference △U2 corresponding to a clogging area of ​​1 / 2 of the filter; and the preset difference for heavy clogging can be a preset difference △U3 corresponding to a clogging area of ​​3 / 4 of the filter.

[0098] S402: If the actual difference △U is greater than or equal to the set difference, a filter cleaning prompt will be issued.

[0099] When the actual difference △U is greater than or equal to the set difference, it indicates that the current blockage of the filter has reached the blockage warning value set by the user. At this time, the indoor unit of the air conditioner can issue a filter cleaning reminder, reminding the user to clean the filter by themselves or contact a maintenance person to clean the filter, so as to ensure the normal operation of the indoor unit of the air conditioner.

[0100] The air conditioner indoor unit blockage identification method provided in this application receives a blockage status prompt value set by the user, determines a set difference in the motor voltage output corresponding to the blockage status prompt value, compares the actual difference ΔU with the set difference, and issues a filter cleaning prompt when the actual difference ΔU is greater than or equal to the set difference. Therefore, it can accurately remind the user to clean the filter based on the actual blockage status of the filter and the user's usage needs, improving the user experience.

[0101] In some embodiments, the air conditioner indoor unit blockage identification method provided in this application further includes: if the difference between the current actual difference and the actual difference of the air conditioner indoor unit last time it was turned on is greater than or equal to the target difference, then a foreign object blockage alarm is issued.

[0102] Air conditioner indoor units are used in a variety of scenarios. If a large object obstructs the air inlet, it can cause extensive clogging of the filter in a short period of time. For example, ceiling decoration materials can suddenly clog the filter. Existing air conditioner indoor units cannot detect or alert users, making it difficult for users to know about extensive filter clogging and affecting their user experience.

[0103] In this embodiment, by judging the relationship between the current actual difference and the difference between the actual difference when the indoor unit was last turned on and the target difference, it is possible to determine whether the filter has become heavily blocked in a short period of time, and thus determine whether there are foreign objects blocking or obstructing the air inlet of the indoor unit. Simultaneously, when the difference between the motor's voltage output value and the voltage output value when the indoor unit was last turned on is greater than or equal to the target difference, indicating that the filter has become heavily blocked in a short period of time, a foreign object blockage alarm is issued, informing the user that the filter has suddenly become heavily blocked, reminding the user to promptly check the cause of the filter blockage and clean the filter.

[0104] For example, the target difference can be set adaptively according to actual needs. For instance, the target difference can be a preset difference △U1 corresponding to a blocking area of ​​1 / 4 of the filter screen.

[0105] Figure 5 This is a schematic diagram of the structure of the air conditioner indoor unit blockage identification device provided in an embodiment of this application. Figure 5 As shown in the figure, this application embodiment provides a device for identifying blockages in an air conditioner indoor unit. The device for identifying blockages in an air conditioner indoor unit includes:

[0106] The acquisition module 501 is used to acquire the ambient temperature, the speed F of the motor of the indoor unit of the air conditioner, and the actual voltage output value of the motor;

[0107] The determining module 502 is used to determine the preset voltage output value of the motor based on the ambient temperature and the motor speed; the determining module 502 is also used to determine the actual difference between the actual voltage output value and the preset voltage output value of the motor; the determining module 502 is also used to determine the clogging status of the filter of the indoor unit of the air conditioner based on the actual difference.

[0108] In one possible implementation, the acquisition module 501 is specifically used to acquire the current ambient temperature and the installation voltage output value of the motor at its highest gear after the indoor unit of the air conditioner enters the motor PWM self-correction control.

[0109] In one possible implementation, the determining module 502 is specifically used to calculate the correction constant based on the current ambient temperature, the motor speed at its highest gear, and the installed voltage output value after the indoor unit of the air conditioner performs motor PWM self-correction control.

[0110] In one possible implementation, the determining module 502 is specifically used to calculate the preset voltage output value of the motor when no blockage occurs based on the ambient temperature, the motor speed and the correction constant, and to calculate the actual difference between the actual voltage output value and the preset voltage output value of the motor.

[0111] In one possible implementation, the determining module 502 is specifically used to determine the set difference of the motor's voltage output based on the blocking status indication value.

[0112] In one possible implementation, the determining module 502 is specifically used to determine a preset difference range of the motor's voltage output under multiple different blockage conditions of the filter screen.

[0113] In one possible implementation, the determining module 502 is specifically used to determine the preset difference range in which the actual difference value lies.

[0114] In one possible implementation, the blockage identification device for the indoor unit of the air conditioner further includes a receiving module for receiving a blockage status prompt value set by the user.

[0115] The air conditioner indoor unit blockage identification device provided in this application embodiment further includes a judgment module 503 and a prompting module 504. The judgment module 503 is used to judge whether the actual difference is greater than or equal to the set difference, and the prompting module 504 is used to issue a filter cleaning prompt when the actual difference is greater than or equal to the set difference.

[0116] In one possible implementation, the judgment module 503 is used to determine whether the difference between the current actual difference and the actual difference of the air conditioner indoor unit last time it was turned on is greater than or equal to the target difference, and the prompting module 504 is used to issue a foreign object blockage alarm when the difference between the current actual difference and the actual difference of the air conditioner indoor unit last time it was turned on is greater than or equal to the target difference.

[0117] Figure 6 A schematic diagram of the hardware structure of the air conditioner provided in this application is shown below. Figure 6 As shown, the air conditioner 600 may include a memory 601 and at least one processor 602. The memory 601 is used to store computer programs. The processor 602 is used to execute the computer programs stored in the memory 601 to implement the air conditioner indoor unit blockage identification method shown in any of the above method embodiments.

[0118] The processor 602 and the memory 601 can communicate. For example, the processor 602 and the memory 601 communicate via a communication bus 603. Optionally, the air conditioner may also include a communication interface, which may include a transmitter and / or a receiver.

[0119] Optionally, the processor 602 described above can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), etc. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in the embodiments of this application can be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules in the processor.

[0120] Specifically, the air conditioner 600 includes both the indoor unit and the outdoor unit.

[0121] This application also provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, are used to implement the blockage identification method for an indoor air conditioning unit as described above.

[0122] It will be understood by those skilled in the art that all or some of the steps, systems, or apparatuses disclosed above, and their functional modules / units, can be implemented as software, firmware, hardware, or suitable combinations thereof. In hardware implementations, the division between functional modules / units mentioned in the above description does not necessarily correspond to the division of physical components; for example, a physical component may have multiple functions, or a function or step may be performed collaboratively by several physical components. Some or all physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit (ASIC). Such software may be distributed on a computer-readable medium, which may include computer storage media (or non-transitory media) and communication media (or transient media). As is known to those skilled in the art, the term computer storage media 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 disc (DVD) or other optical disc storage, magnetic cartridges, magnetic tape, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and can be accessed by a computer. Furthermore, it is well known to those skilled in the art that communication media typically contain computer-readable instructions, data structures, program modules, or other data in modulated data signals such as carrier waves or other transmission mechanisms, and may include any information delivery medium.

[0123] The technical solutions of this application have been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it is readily understood by those skilled in the art that the scope of protection of this application is obviously not limited to these specific embodiments. The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A method for identifying blockages in an air conditioner indoor unit, characterized in that, The method includes: The ambient temperature, the speed of the motor in the indoor unit of the air conditioner, and the actual voltage output value of the motor are obtained. The preset voltage output value of the motor is determined based on the ambient temperature and the motor speed. The actual difference between the actual voltage output value and the preset voltage output value is determined. Based on the actual difference, the blockage status of the filter screen of the indoor unit of the air conditioner is determined.

2. The method according to claim 1, characterized in that, Determining the preset voltage output value of the motor based on the ambient temperature and the motor speed includes: The initial voltage output value of the motor is determined based on the ambient temperature and the motor speed. The preset voltage output value is determined based on the initial voltage output value and the correction constant.

3. The method according to claim 2, characterized in that, The step of determining the preset voltage output value based on the initial voltage output value and the correction constant includes: The correction constant is obtained after the initial installation of the indoor unit of the air conditioner, after a change in the operating environment of the indoor unit of the air conditioner, or after the filter is cleaned; The preset voltage output value is obtained by summing the initial voltage output value and the correction constant.

4. The method according to claim 2, characterized in that, The process of obtaining the correction constant after the initial installation of the indoor unit of the air conditioner, after a change in the operating environment of the indoor unit, or after cleaning the filter includes: After the initial installation of the indoor unit of the air conditioner, after a change in the operating environment of the indoor unit of the air conditioner, or after cleaning the filter, the current ambient temperature, the speed of the motor at its highest setting, and the installation voltage output value of the motor at its highest setting under the current ambient temperature are obtained. The initial voltage output value of the motor is determined based on the current ambient temperature and the motor speed at its highest gear. The correction constant is determined based on the installed voltage output value and the initial voltage output value, wherein the correction constant is the difference between the installed voltage output value and the initial voltage output value.

5. The method according to any one of claims 1-4, characterized in that, The step of determining the clogging status of the filter screen of the indoor unit of the air conditioner based on the actual difference includes: Determine a preset difference range of the motor's voltage output under multiple different blockage conditions of the filter screen; Based on the actual difference, determine the preset difference range corresponding to the actual difference, and the blocking situation corresponding to the preset difference range.

6. The method according to any one of claims 1-4, characterized in that, Also includes: Based on the set blockage status indication value, determine the set difference in the voltage output of the motor corresponding to the blockage status indication value; If the actual difference is greater than or equal to the set difference, a filter cleaning prompt will be issued.

7. The method according to any one of claims 1-4, characterized in that, Also includes: If the current actual difference is greater than or equal to the actual difference when the indoor unit of the air conditioner was last turned on, a foreign object blockage alarm will be issued.

8. A device for identifying blockages in an air conditioner indoor unit, characterized in that, include: The acquisition module is used to acquire the ambient temperature, the speed of the motor of the indoor unit of the air conditioner, and the actual voltage output value of the motor; The determining module is used to determine the preset voltage output value of the motor based on the ambient temperature and the motor speed; The determining module is further configured to determine the actual difference in voltage output of the motor based on the actual voltage output value and the preset voltage output value; The determining module is also used to determine the clogging status of the filter screen of the indoor unit of the air conditioner based on the actual difference.

9. An air conditioner, characterized in that, include: The memory stores computer-executed instructions; A processor, which is communicatively connected to the memory, executes computer execution instructions stored in the memory to implement the blockage identification method for an indoor air conditioning unit as described in any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions, which, when executed by a processor, are used to implement the blockage identification method for an indoor air conditioning unit as described in any one of claims 1 to 7.

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